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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4,500 |
1710.10121
|
Yiping Lu
|
Yiping Lu, Aoxiao Zhong, Quanzheng Li, Bin Dong
|
Beyond Finite Layer Neural Networks: Bridging Deep Architectures and
Numerical Differential Equations
| null | null | null | null |
cs.CV cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In our work, we bridge deep neural network design with numerical differential
equations. We show that many effective networks, such as ResNet, PolyNet,
FractalNet and RevNet, can be interpreted as different numerical
discretizations of differential equations. This finding brings us a brand new
perspective on the design of effective deep architectures. We can take
advantage of the rich knowledge in numerical analysis to guide us in designing
new and potentially more effective deep networks. As an example, we propose a
linear multi-step architecture (LM-architecture) which is inspired by the
linear multi-step method solving ordinary differential equations. The
LM-architecture is an effective structure that can be used on any ResNet-like
networks. In particular, we demonstrate that LM-ResNet and LM-ResNeXt (i.e. the
networks obtained by applying the LM-architecture on ResNet and ResNeXt
respectively) can achieve noticeably higher accuracy than ResNet and ResNeXt on
both CIFAR and ImageNet with comparable numbers of trainable parameters. In
particular, on both CIFAR and ImageNet, LM-ResNet/LM-ResNeXt can significantly
compress ($>50$\%) the original networks while maintaining a similar
performance. This can be explained mathematically using the concept of modified
equation from numerical analysis. Last but not least, we also establish a
connection between stochastic control and noise injection in the training
process which helps to improve generalization of the networks. Furthermore, by
relating stochastic training strategy with stochastic dynamic system, we can
easily apply stochastic training to the networks with the LM-architecture. As
an example, we introduced stochastic depth to LM-ResNet and achieve significant
improvement over the original LM-ResNet on CIFAR10.
|
[{'version': 'v1', 'created': 'Fri, 27 Oct 2017 13:19:59 GMT'}
{'version': 'v2', 'created': 'Wed, 1 Nov 2017 09:19:19 GMT'}
{'version': 'v3', 'created': 'Mon, 23 Mar 2020 04:20:58 GMT'}]
|
2020-03-24
|
[array(['Lu', 'Yiping', ''], dtype=object)
array(['Zhong', 'Aoxiao', ''], dtype=object)
array(['Li', 'Quanzheng', ''], dtype=object)
array(['Dong', 'Bin', ''], dtype=object)]
|
4,501 |
cond-mat/0508123
|
Andreas Honecker
|
A. Honecker, S. Wessel
|
Magnetocaloric effect in two-dimensional spin-1/2 antiferromagnets
|
2 pages, 2 figures included, to appear in Physica B (proceedings of
SCES'05)
|
Physica B378-380 (2006) 1098-1099
|
10.1016/j.physb.2006.01.436
| null |
cond-mat.str-el cond-mat.stat-mech
| null |
The magnetocaloric effect is studied at the transition to saturation in the
antiferromagnetic spin-1/2 Heisenberg model on the simplest two-dimensional
lattices, namely the square and the triangular lattice. Numerical results are
presented for the entropy which are consistent with identical universal
properties. However, the absolute values of the entropy are bigger on the
geometrically frustrated triangular lattice than on the non-frustrated square
lattice, indicating that frustration improves the magnetocaloric properties.
|
[{'version': 'v1', 'created': 'Thu, 4 Aug 2005 08:35:14 GMT'}]
|
2007-05-23
|
[array(['Honecker', 'A.', ''], dtype=object)
array(['Wessel', 'S.', ''], dtype=object)]
|
4,502 |
hep-ph/0611096
|
Fl. Stancu
|
N. Matagne and Fl. Stancu
|
Baryon resonances in large $N_c$ QCD
|
6 pages, based on a talk given by Fl. Stancu at the Miniworkshop
"Progress in Quark Models" Bled, Slovenia, July 10-17, 2006, to be published
in Bled Workshops in Physics, vol. 7 no. 1
| null | null | null |
hep-ph
| null |
The baryon spectra are discussed in the context of the $1/N_c$ expansion
approach, with emphasis on mixed symmetric states. The contributions of the
spin dependent terms as a function of the excitation energy are shown
explicitly. At large energies these contributions are expected to vanish.
|
[{'version': 'v1', 'created': 'Wed, 8 Nov 2006 10:47:50 GMT'}]
|
2007-05-23
|
[array(['Matagne', 'N.', ''], dtype=object)
array(['Stancu', 'Fl.', ''], dtype=object)]
|
4,503 |
2111.12026
|
Pietro Biondi
|
Giampaolo Bella, Pietro Biondi, Gianpiero Costantino, Ilaria Matteucci
|
CINNAMON: A Module for AUTOSAR Secure Onboard Communication
| null |
G. Bella, P. Biondi, G. Costantino and I. Matteucci, "CINNAMON: A
Module for AUTOSAR Secure Onboard Communication," 2020 16th European
Dependable Computing Conference (EDCC), 2020, pp. 103-110
|
10.1109/EDCC51268.2020.00026
| null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper introduces CINNAMON, a software module that extends and seamlessly
integrates with the AUTOSAR "Secure Onboard Communication" (SecOC) module to
also account for confidentiality of data in transit. It stands for
Confidential, INtegral aNd Authentic on board coMunicatiON (CINNAMON). It takes
a resource-efficient and practical approach to ensure, at the same time,
confidentiality, integrity and authenticity of frames. The main new requirement
that CINNAMON puts forward is the use of encryption and thus, as a result,
CINNAMON exceeds SecOC against information gathering attacks. This paper sets
forth the essential requirements and specification of the new module by
detailing where and how to position it within AUTOSAR and by emphasizing the
relevant upgrades with respect to SecOC. The presentation continues with the
definition of a Security Profile and a summary of a prototype implementation of
ours. While CINNAMON is easily extensible, for example through the definition
of additional profiles, the current performances obtained on inexpensive boards
support the claim that the approach is feasible.
|
[{'version': 'v1', 'created': 'Sat, 20 Nov 2021 18:31:17 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Nov 2021 16:47:31 GMT'}]
|
2021-11-25
|
[array(['Bella', 'Giampaolo', ''], dtype=object)
array(['Biondi', 'Pietro', ''], dtype=object)
array(['Costantino', 'Gianpiero', ''], dtype=object)
array(['Matteucci', 'Ilaria', ''], dtype=object)]
|
4,504 |
2306.17301
|
Shijun Zhang
|
Shijun Zhang, Hongkai Zhao, Yimin Zhong, Haomin Zhou
|
Why Shallow Networks Struggle with Approximating and Learning High
Frequency: A Numerical Study
| null | null | null | null |
cs.LG cs.NA math.NA stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, a comprehensive numerical study involving analysis and
experiments shows why a two-layer neural network has difficulties handling high
frequencies in approximation and learning when machine precision and
computation cost are important factors in real practice. In particular, the
following fundamental computational issues are investigated: (1) the best
accuracy one can achieve given a finite machine precision, (2) the computation
cost to achieve a given accuracy, and (3) stability with respect to
perturbations. The key to the study is the spectral analysis of the
corresponding Gram matrix of the activation functions which also shows how the
properties of the activation function play a role in the picture.
|
[{'version': 'v1', 'created': 'Thu, 29 Jun 2023 20:58:48 GMT'}]
|
2023-07-03
|
[array(['Zhang', 'Shijun', ''], dtype=object)
array(['Zhao', 'Hongkai', ''], dtype=object)
array(['Zhong', 'Yimin', ''], dtype=object)
array(['Zhou', 'Haomin', ''], dtype=object)]
|
4,505 |
2007.01790
|
Jihong Park
|
Anis Elgabli, Jihong Park, Chaouki Ben Issaid, Mehdi Bennis
|
Harnessing Wireless Channels for Scalable and Privacy-Preserving
Federated Learning
|
14 pages, 7 figures; This article has been submitted to IEEE for
possible publication
| null | null | null |
cs.LG cs.IT cs.NI math.IT stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Wireless connectivity is instrumental in enabling scalable federated learning
(FL), yet wireless channels bring challenges for model training, in which
channel randomness perturbs each worker's model update while multiple workers'
updates incur significant interference under limited bandwidth. To address
these challenges, in this work we formulate a novel constrained optimization
problem, and propose an FL framework harnessing wireless channel perturbations
and interference for improving privacy, bandwidth-efficiency, and scalability.
The resultant algorithm is coined analog federated ADMM (A-FADMM) based on
analog transmissions and the alternating direction method of multipliers
(ADMM). In A-FADMM, all workers upload their model updates to the parameter
server (PS) using a single channel via analog transmissions, during which all
models are perturbed and aggregated over-the-air. This not only saves
communication bandwidth, but also hides each worker's exact model update
trajectory from any eavesdropper including the honest-but-curious PS, thereby
preserving data privacy against model inversion attacks. We formally prove the
convergence and privacy guarantees of A-FADMM for convex functions under
time-varying channels, and numerically show the effectiveness of A-FADMM under
noisy channels and stochastic non-convex functions, in terms of convergence
speed and scalability, as well as communication bandwidth and energy
efficiency.
|
[{'version': 'v1', 'created': 'Fri, 3 Jul 2020 16:31:15 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Nov 2020 09:17:13 GMT'}]
|
2020-11-18
|
[array(['Elgabli', 'Anis', ''], dtype=object)
array(['Park', 'Jihong', ''], dtype=object)
array(['Issaid', 'Chaouki Ben', ''], dtype=object)
array(['Bennis', 'Mehdi', ''], dtype=object)]
|
4,506 |
2102.00531
|
Mir Lodro
|
Mir Lodro (1), Gabriele Gradoni (1 and 2), Christopher Smartt (1), Ana
Vukovic (1), David Thomas (1) and Steve Greedy (1) ((1) George Green
Institute for Electromagnetics Research-GGIEMR, the University of Nottingham,
UK (2) Cavendish Laboratory, the University of Cambridge, UK)
|
Near-field Image Transmission and EVM Measurements in Rich Scattering
Environment
| null | null | null | null |
eess.SP cs.IT math.IT
|
http://creativecommons.org/licenses/by/4.0/
|
In this work, we present near-field image transmission and error vector
magnitude measurement in a rich scattering environment in a metal enclosure. We
check the effect of loading metal enclosure on the performance of SDR based
near-field communication link. We focus on the key communication receiver
parameters to observe the effect of near-field link in presence of
rich-scattering and in presence of loading with RF absorber cones. The
near-field performance is measured by transmitting wideband OFDM-modulated
packets containing image information. Our finding suggests that the performance
of OFDM based wideband near-field communication improves when the metal
enclosure is loaded with RF absorbers. Near-field EVM improves when the
enclosure is loaded with RF absorber cones. Loading of the metal enclosure has
the effect of increased coherence bandwidth. Frequency selectivity was observed
in an empty enclosure which suggests coherence bandwidth less than the signal
bandwidth.
|
[{'version': 'v1', 'created': 'Sun, 31 Jan 2021 20:51:21 GMT'}]
|
2021-02-02
|
[array(['Lodro', 'Mir', '', '1 and 2'], dtype=object)
array(['Gradoni', 'Gabriele', '', '1 and 2'], dtype=object)
array(['Smartt', 'Christopher', ''], dtype=object)
array(['Vukovic', 'Ana', ''], dtype=object)
array(['Thomas', 'David', ''], dtype=object)
array(['Greedy', 'Steve', ''], dtype=object)]
|
4,507 |
2204.10973
|
Nuo Chen
|
Yushu Zhang, Nuo Chen, Shuren Qi, Mingfu Xue, and Xiaochun Cao
|
Detecting Recolored Image by Spatial Correlation
|
11 pages, 13 figures
| null | null | null |
cs.CV cs.MM
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Image forensics, aiming to ensure the authenticity of the image, has made
great progress in dealing with common image manipulation such as copy-move,
splicing, and inpainting in the past decades. However, only a few researchers
pay attention to an emerging editing technique called image recoloring, which
can manipulate the color values of an image to give it a new style. To prevent
it from being used maliciously, the previous approaches address the
conventional recoloring from the perspective of inter-channel correlation and
illumination consistency. In this paper, we try to explore a solution from the
perspective of the spatial correlation, which exhibits the generic detection
capability for both conventional and deep learning-based recoloring. Through
theoretical and numerical analysis, we find that the recoloring operation will
inevitably destroy the spatial correlation between pixels, implying a new prior
of statistical discriminability. Based on such fact, we generate a set of
spatial correlation features and learn the informative representation from the
set via a convolutional neural network. To train our network, we use three
recoloring methods to generate a large-scale and high-quality data set.
Extensive experimental results in two recoloring scenes demonstrate that the
spatial correlation features are highly discriminative. Our method achieves the
state-of-the-art detection accuracy on multiple benchmark datasets and exhibits
well generalization for unknown types of recoloring methods.
|
[{'version': 'v1', 'created': 'Sat, 23 Apr 2022 01:54:06 GMT'}]
|
2022-04-26
|
[array(['Zhang', 'Yushu', ''], dtype=object)
array(['Chen', 'Nuo', ''], dtype=object)
array(['Qi', 'Shuren', ''], dtype=object)
array(['Xue', 'Mingfu', ''], dtype=object)
array(['Cao', 'Xiaochun', ''], dtype=object)]
|
4,508 |
2305.05846
|
Wataru Kawabe
|
Wataru Kawabe, Yuri Nakao, Akihisa Shitara, and Yusuke Sugano
|
Technical Understanding from IML Hands-on Experience: A Study through a
Public Event for Science Museum Visitors
|
26 pages, 9 figures
| null | null | null |
cs.HC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
While AI technology is becoming increasingly prevalent in our daily lives,
the comprehension of machine learning (ML) among non-experts remains limited.
Interactive machine learning (IML) has the potential to serve as a tool for end
users, but many existing IML systems are designed for users with a certain
level of expertise. Consequently, it remains unclear whether IML experiences
can enhance the comprehension of ordinary users. In this study, we conducted a
public event using an IML system to assess whether participants could gain
technical comprehension through hands-on IML experiences. We implemented an
interactive sound classification system featuring visualization of internal
feature representation and invited visitors at a science museum to freely
interact with it. By analyzing user behavior and questionnaire responses, we
discuss the potential and limitations of IML systems as a tool for promoting
technical comprehension among non-experts.
|
[{'version': 'v1', 'created': 'Wed, 10 May 2023 02:37:13 GMT'}
{'version': 'v2', 'created': 'Fri, 12 May 2023 01:26:07 GMT'}]
|
2023-05-15
|
[array(['Kawabe', 'Wataru', ''], dtype=object)
array(['Nakao', 'Yuri', ''], dtype=object)
array(['Shitara', 'Akihisa', ''], dtype=object)
array(['Sugano', 'Yusuke', ''], dtype=object)]
|
4,509 |
1102.4619
|
Takahiko Matsubara
|
Takahiko Matsubara
|
Nonlinear Perturbation Theory Integrated with Nonlocal Bias,
Redshift-space Distortions, and Primordial Non-Gaussianity
|
20 pages, 17 figures, submitted to PRD, revised version, references
are added
|
Phys.Rev.D83:083518,2011
|
10.1103/PhysRevD.83.083518
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The standard nonlinear perturbation theory of the gravitational instability
is extended to incorporate the nonlocal bias, redshift-space distortions, and
primordial non-Gaussianity. We show that local Eulerian bias is not generally
compatible to local Lagrangian bias in nonlinear regime. The Eulerian and
Lagrangian biases are nonlocally related order by order in the general
perturbation theory. The relation between Eulerian and Lagrangian kernels of
density perturbations with biasing are derived. The effects of primordial
non-Gaussianity and redshift-space distortions are also incorporated in our
general formalism, and diagrammatic methods are introduced. Vertex resummations
of higher-order perturbations in the presence of bias are considered.
Resummations of Lagrangian bias are shown to be essential to handle biasing
schemes in a general framework.
|
[{'version': 'v1', 'created': 'Tue, 22 Feb 2011 21:02:36 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Mar 2011 09:56:29 GMT'}]
|
2011-05-05
|
[array(['Matsubara', 'Takahiko', ''], dtype=object)]
|
4,510 |
astro-ph/9911298
|
Novak
|
J. Novak and J.M. Ibanez
|
Gravitational waves from the collapse and bounce of a stellar core in
tensor-scalar gravity
|
30 pages, 17 figures, uses AASLATEX v4.0 Accepted for publication in
the Astrophysical Journal
|
Astrophys.J. 533 (2000) 392-405
|
10.1086/308627
| null |
astro-ph gr-qc
| null |
Tensor-scalar theory of gravity allows the generation of gravitational waves
from astrophysical sources, like Supernov\ae{}, even in the spherical case.
That motivated us to study the collapse of a degenerate stellar core, within
tensor-scalar gravity, leading to the formation of a neutron star through a
bounce and the formation of a shock. We discuss in this paper the effects of
the scalar field on the evolution of the system, as well as the appearance of
strong non-perturbative effects of this scalar field (the so-called
``spontaneous scalarization''). As a main result, we describe the resulting
gravitational monopolar radiation (form and amplitude) and discuss the
possibility of its detection by the gravitational detectors currently under
construction, taking into account the existing constraints on the scalar field.
From the numerical point of view it is worthy to point out that we have
developed a combined code which uses pseudo-spectral methods, for the evolution
of the scalar field, and High Resolution Shock-Capturing schemes, for the
evolution of the hydrodynamical system. Although this code has been used to
integrate the field equations of that theory of gravity, in the spherically
symmetric case, a by-product of the present work is to gain experience for an
ulterior extension to multidimensional problems in Numerical Relativity of such
numerical strategy.
|
[{'version': 'v1', 'created': 'Tue, 16 Nov 1999 09:47:05 GMT'}]
|
2009-10-31
|
[array(['Novak', 'J.', ''], dtype=object)
array(['Ibanez', 'J. M.', ''], dtype=object)]
|
4,511 |
2001.01308
|
Alexandra Kuznetsova
|
Alexandra Kuznetsova
|
Finite 3-subgroups in Cremona group of rank 3
|
17 pages; minor updates
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider 3-subgroups in groups of birational automorphisms of rationally
connected threefolds and show that any 3-subgroup can be generated by at most
five elements. Moreover, we study groups of regular automorphisms of terminal
Fano threefolds and prove that in all cases which are not among several
explicitly described exceptions any 3-subgroup of such group can be generated
by at most four elements.
|
[{'version': 'v1', 'created': 'Sun, 5 Jan 2020 20:21:15 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Jun 2020 14:07:08 GMT'}]
|
2020-06-09
|
[array(['Kuznetsova', 'Alexandra', ''], dtype=object)]
|
4,512 |
1903.01624
|
Benjamin Nachman
|
Benjamin Nachman and Alex Spies
|
Nonlocal Thresholds for Improving the Spatial Resolution of Pixel
Detectors
|
15 pages, 6 figures
|
Journal of Instrumentation, Volume 14, September 2019
|
10.1088/1748-0221/14/09/P09028
| null |
physics.ins-det hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Pixel detectors only record signals above a tuned threshold in order to
suppress noise. As sensors become thinner, pitches decrease, and radiation
damage reduces the collected charge, it is increasingly desirable to lower
thresholds. By making the simple, but powerful observation that hit pixels tend
to be spatially close to each other, we introduce a scheme for dynamic
thresholds. This dynamic scheme can enhance the signal efficiency without
significantly increasing the occupancy. In addition to presenting a selection
of empirical results, we also discuss some potential methods for implementing
dynamic thresholds in a realistic readout chip for the Large Hadron Collider or
other future colliders.
|
[{'version': 'v1', 'created': 'Tue, 5 Mar 2019 01:37:17 GMT'}]
|
2019-10-02
|
[array(['Nachman', 'Benjamin', ''], dtype=object)
array(['Spies', 'Alex', ''], dtype=object)]
|
4,513 |
2002.09507
|
Vanda Pereira
|
V. M. Pereira, C. N. Wu, C. E. Liu, S.-S. Liao, C. F. Chang, C.-Y.
Kuo, C. Koz, U. Schwarz, H.-J. Lin, C. T. Chen. L. H. Tjeng, S. G. Altendorf
|
Molecular beam epitaxy preparation and in situ characterization of FeTe
thin films
|
6 pages, 6 figures accepted for publication in Physical Review
Materials
|
Phys. Rev. Materials 4, 023405, 2020
|
10.1103/PhysRevMaterials.4.023405
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have synthesized Fe$_{1+y}$Te thin films by means of molecular beam
epitaxy (MBE) under Te-limited growth conditions. We found that epitaxial
layer-by-layer growth is possible for a wide range of excess Fe values, wider
than expected from what is known on the bulk material. Using x-ray magnetic
circular dichroism spectroscopy at the Fe L$_{2,3}$ and Te M$_{4,5}$ edges, we
observed that films with high excess Fe contain ferromagnetic clusters while
films with lower excess Fe remain nonmagnetic. Moreover, x-ray absorption
spectroscopy showed that it is possible to obtain films with very similar
electronic structure as that of a high quality bulk single crystal
Fe$_{1.14}$Te. Our results suggest that MBE with Te-limited growth may provide
an opportunity to synthesize FeTe films with smaller amounts of excess Fe as to
come closer to a possible superconducting phase.
|
[{'version': 'v1', 'created': 'Fri, 21 Feb 2020 19:06:38 GMT'}]
|
2020-03-05
|
[array(['Pereira', 'V. M.', ''], dtype=object)
array(['Wu', 'C. N.', ''], dtype=object)
array(['Liu', 'C. E.', ''], dtype=object)
array(['Liao', 'S. -S.', ''], dtype=object)
array(['Chang', 'C. F.', ''], dtype=object)
array(['Kuo', 'C. -Y.', ''], dtype=object)
array(['Koz', 'C.', ''], dtype=object)
array(['Schwarz', 'U.', ''], dtype=object)
array(['Lin', 'H. -J.', ''], dtype=object)
array(['Tjeng', 'C. T. Chen. L. H.', ''], dtype=object)
array(['Altendorf', 'S. G.', ''], dtype=object)]
|
4,514 |
1807.08696
|
Guanying Chen
|
Guanying Chen, Kai Han, Kwan-Yee K. Wong
|
PS-FCN: A Flexible Learning Framework for Photometric Stereo
|
ECCV 2018: https://guanyingc.github.io/PS-FCN
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper addresses the problem of photometric stereo for non-Lambertian
surfaces. Existing approaches often adopt simplified reflectance models to make
the problem more tractable, but this greatly hinders their applications on
real-world objects. In this paper, we propose a deep fully convolutional
network, called PS-FCN, that takes an arbitrary number of images of a static
object captured under different light directions with a fixed camera as input,
and predicts a normal map of the object in a fast feed-forward pass. Unlike the
recently proposed learning based method, PS-FCN does not require a pre-defined
set of light directions during training and testing, and can handle multiple
images and light directions in an order-agnostic manner. Although we train
PS-FCN on synthetic data, it can generalize well on real datasets. We further
show that PS-FCN can be easily extended to handle the problem of uncalibrated
photometric stereo.Extensive experiments on public real datasets show that
PS-FCN outperforms existing approaches in calibrated photometric stereo, and
promising results are achieved in uncalibrated scenario, clearly demonstrating
its effectiveness.
|
[{'version': 'v1', 'created': 'Mon, 23 Jul 2018 16:13:27 GMT'}]
|
2018-07-24
|
[array(['Chen', 'Guanying', ''], dtype=object)
array(['Han', 'Kai', ''], dtype=object)
array(['Wong', 'Kwan-Yee K.', ''], dtype=object)]
|
4,515 |
1511.03028
|
Chang Tang
|
Chang Tang, Pichao Wang, Wanqing Li
|
Online Action Recognition based on Incremental Learning of Weighted
Covariance Descriptors
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Different from traditional action recognition based on video segments, online
action recognition aims to recognize actions from unsegmented streams of data
in a continuous manner. One way for online recognition is based on the evidence
accumulation over time to make predictions from stream videos. This paper
presents a fast yet effective method to recognize actions from stream of noisy
skeleton data, and a novel weighted covariance descriptor is adopted to
accumulate evidence. In particular, a fast incremental updating method for the
weighted covariance descriptor is developed for accumulation of temporal
information and online prediction. The weighted covariance descriptor takes the
following principles into consideration: past frames have less contribution for
recognition and recent and informative frames such as key frames contribute
more to the recognition. The online recognition is achieved using a simple
nearest neighbor search against a set of offline trained action models.
Experimental results on MSC-12 Kinect Gesture dataset and our newly constructed
online action recognition dataset have demonstrated the efficacy of the
proposed method.
|
[{'version': 'v1', 'created': 'Tue, 10 Nov 2015 09:18:30 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Apr 2017 02:04:51 GMT'}
{'version': 'v3', 'created': 'Wed, 5 Apr 2017 06:45:02 GMT'}
{'version': 'v4', 'created': 'Thu, 6 Jul 2017 11:22:38 GMT'}]
|
2017-07-07
|
[array(['Tang', 'Chang', ''], dtype=object)
array(['Wang', 'Pichao', ''], dtype=object)
array(['Li', 'Wanqing', ''], dtype=object)]
|
4,516 |
1508.01037
|
Stephen Walker
|
S. A. Walker, P. Kosec, A. C. Fabian, J. S. Sanders
|
X-ray Analysis of Filaments in Galaxy Clusters
|
11 pages, 11 figures. Accepted for publication in MNRAS
| null |
10.1093/mnras/stv1829
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We perform a detailed X-ray study of the filaments surrounding the brightest
cluster galaxies in a sample of nearby galaxy clusters using deep Chandra
observations, namely the Perseus, Centaurus and Virgo clusters, and Abell 1795.
We compare the X-ray properties and spectra of the filaments in all of these
systems, and find that their Chandra X-ray spectra are all broadly consistent
with an absorbed two temperature thermal model, with temperature components at
0.75 and 1.7 keV. We find that it is also possible to model the Chandra ACIS
filament spectra with a charge exchange model provided a thermal component is
also present, and the abundance of oxygen is suppressed relative to the
abundance of Fe. In this model, charge exchange provides the dominant
contribution to the spectrum in the 0.5-1.0 keV band. However, when we study
the high spectral resolution RGS spectrum of the filamentary plume seen in
X-rays in Centaurus, the opposite appears to be the case. The properties of the
filaments in our sample of clusters are also compared to the X-ray tails of
galaxies in the Coma cluster and Abell 3627. In the Perseus cluster, we search
for signs of absorption by a prominent region of molecular gas in the
filamentary structure around NGC 1275. We do find a decrement in the X-ray
spectrum below 2 keV, indicative of absorption. However the spectral shape is
inconsistent with this decrement being caused by simply adding an additional
absorbing component. We find that the spectrum can be well fit (with physically
sensible parameters) with a model that includes both absorption by molecular
gas and X-ray emission from the filament, which partially counteracts the
absorption.
|
[{'version': 'v1', 'created': 'Wed, 5 Aug 2015 11:25:41 GMT'}]
|
2015-09-16
|
[array(['Walker', 'S. A.', ''], dtype=object)
array(['Kosec', 'P.', ''], dtype=object)
array(['Fabian', 'A. C.', ''], dtype=object)
array(['Sanders', 'J. S.', ''], dtype=object)]
|
4,517 |
1806.07255
|
Hermann Matthies
|
Hermann G. Matthies and Roger Ohayon
|
Analysis of parametric models for coupled systems
|
14 pages. It contains a synopsis of arXiv:1806.01101. arXiv admin
note: substantial text overlap with arXiv:1806.01101
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In many instances one has to deal with parametric models. Such models in
vector spaces are connected to a linear map. The reproducing kernel Hilbert
space and affine- / linear- representations in terms of tensor products are
directly related to this linear operator. This linear map leads to a
generalised correlation operator, in fact it provides a factorisation of the
correlation operator and of the reproducing kernel. The spectral decomposition
of the correlation and kernel, as well as the associated Karhunen-Lo\`eve or
proper orthogonal decomposition are a direct consequence. This formulation thus
unifies many such constructions under a functional analytic view. Recursively
applying factorisations in higher order tensor representations leads to
hierarchical tensor decompositions. This format also allows refinements for
cases when the parametric model has more structure. Examples are shown for
vector- and tensor-fields with certain required properties. Another kind of
structure is the parametric model of a coupled system. It is shown that this
can also be reflected in the theoretical framework.
|
[{'version': 'v1', 'created': 'Sun, 17 Jun 2018 19:25:41 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Nov 2018 17:28:27 GMT'}]
|
2018-11-26
|
[array(['Matthies', 'Hermann G.', ''], dtype=object)
array(['Ohayon', 'Roger', ''], dtype=object)]
|
4,518 |
2204.12067
|
Emily Bartusiak
|
Kratika Bhagtani, Amit Kumar Singh Yadav, Emily R. Bartusiak, Ziyue
Xiang, Ruiting Shao, Sriram Baireddy, Edward J. Delp
|
An Overview of Recent Work in Media Forensics: Methods and Threats
|
This is a longer version of a paper accepted to the 2022 IEEE
International Conference on Multimedia Information Processing and Retrieval
entitled "An Overview of Recent Work in Multimedia Forensics"
| null | null | null |
cs.CV cs.MM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we review recent work in media forensics for digital images,
video, audio (specifically speech), and documents. For each data modality, we
discuss synthesis and manipulation techniques that can be used to create and
modify digital media. We then review technological advancements for detecting
and quantifying such manipulations. Finally, we consider open issues and
suggest directions for future research.
|
[{'version': 'v1', 'created': 'Tue, 26 Apr 2022 04:17:19 GMT'}
{'version': 'v2', 'created': 'Thu, 12 May 2022 20:09:42 GMT'}]
|
2022-05-16
|
[array(['Bhagtani', 'Kratika', ''], dtype=object)
array(['Yadav', 'Amit Kumar Singh', ''], dtype=object)
array(['Bartusiak', 'Emily R.', ''], dtype=object)
array(['Xiang', 'Ziyue', ''], dtype=object)
array(['Shao', 'Ruiting', ''], dtype=object)
array(['Baireddy', 'Sriram', ''], dtype=object)
array(['Delp', 'Edward J.', ''], dtype=object)]
|
4,519 |
physics/0410114
|
David Blaschke
|
D.B. Blaschke, A.V. Prozorkevich, S.A. Smolyansky, A.V. Tarakanov
|
Pulsations of the electron-positron plasma in the field of optical
lasers
|
6 pages, 2 figures, Contribution to the workshop on Kinetic Theory of
Nonideal Plasmas, 27.-29. September, Kiel, Germany
| null | null | null |
physics.plasm-ph hep-ph physics.acc-ph quant-ph
| null |
The possibility to observe vacuum electron-positron pair creation due to a
powerful optical laser pulse is discussed. We employ a quantum kinetic
formulation of the problem with a source term describing the vacuum pair
production in a homogeneous electric field with arbitrary time dependence
(dynamical Schwinger mechanism). For a periodic field weak in comparison with
the critical value E_{cr}=m^2/|e|, the electron-positron plasma density changes
approximately periodically with twice the field frequency. Under these
conditions, the mean value $<n>$ for the density per period in the volume
lambda^3 is a more appropriate characteristic quantity than the residual
density n_r which is taken over an integer number of field periods and
calculated using the imaginary time method. The value <n> is proportional to
the squared field intensity and does not depend on the frequency. We show that
in terms of the parameter <n> an optical laser can be more effective than a
X-ray one. We expect that it is possible to observe the vacuum creation effect
not only by means of the planned X-ray free electron lasers but already at
present-day optical lasers.
|
[{'version': 'v1', 'created': 'Sat, 16 Oct 2004 21:20:04 GMT'}]
|
2007-05-23
|
[array(['Blaschke', 'D. B.', ''], dtype=object)
array(['Prozorkevich', 'A. V.', ''], dtype=object)
array(['Smolyansky', 'S. A.', ''], dtype=object)
array(['Tarakanov', 'A. V.', ''], dtype=object)]
|
4,520 |
hep-ex/0104007
|
Jan Timmermans
|
The DELPHI Collaboration, P. Abreu, et al
|
Search for sleptons in e+e- collisions at sqrt(s) = 183 to 189 GeV
|
25 pages, 9 figures
|
Eur.Phys.J.C19:29-42,2001
|
10.1007/s100520100595
|
CERN-EP/2000-134
|
hep-ex
| null |
Data taken by the DELPHI experiment at centre-of-mass energies of 183 GeV and
189 GeV with a total integrated luminosity of 212 pb^{-1} have been used to
search for the supersymmetric partners of the electrons, muons, and taus in the
context of the Minimal Supersymmetric Standard Model (MSSM). The decay
topologies searched for were the direct decay ({\tilde \ell} -> \ell {\tilde
\chi_1^0}), producing acoplanar lepton pairs plus missing energy, and the
cascade decay ({\tilde \ell} -> \ell {\tilde \chi_2^0} -> \ell \gamma {\tilde
\chi_1^0}), producing acoplanar lepton and photon pairs plus missing energy.
The observed number of events is in agreement with Standard Model predictions.
The 95% CL excluded mass limits for selectrons, smuons and staus are m_{\tilde
{e}} \leq 87 GeV/c^2, m_{\tilde {\mu}} \leq 80 GeV/c^2 and m_{\tilde {\tau}}
\leq 75 GeV/c^2, respectively, for values of \mu=-200 GeV/c^2 and
tan(beta)=1.5.
|
[{'version': 'v1', 'created': 'Tue, 3 Apr 2001 16:21:30 GMT'}]
|
2010-04-08
|
[array(['The DELPHI Collaboration', '', ''], dtype=object)
array(['Abreu', 'P.', ''], dtype=object)]
|
4,521 |
1304.0857
|
Mohammed Nabil El Korso M. N. El Korso
|
R\'emy Boyer, Mohammed Nabil El Korso, Alexandre Renaux and Sylvie
Marcos
|
Coexistence of Near-Field and Far-Field Sources: the Angular Resolution
Limit
| null | null |
10.1088/1742-6596/464/1/012002
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Passive source localization is a well known inverse problem in which we
convert the observed measurements into information about the direction of
arrivals. In this paper we focus on the optimal resolution of such problem.
More precisely, we propose in this contribution to derive and analyze the
Angular Resolution Limit (ARL) for the scenario of mixed Near-Field (NF) and
Far-Field (FF) Sources. This scenario is relevant to some realistic situations.
We base our analysis on the Smith's equation which involves the Cram\'er-Rao
Bound (CRB). This equation provides the theoretical ARL which is independent of
a specific estimator. Our methodology is the following: first, we derive a
closed-form expression of the CRB for the considered problem. Using these
expressions, we can rewrite the Smith's equation as a 4-th order polynomial by
assuming a small separation of the sources. Finally, we derive in closed-form
the analytic ARL under or not the assumption of low noise variance. The
obtained expression is compact and can provide useful qualitative informations
on the behavior of the ARL.
|
[{'version': 'v1', 'created': 'Wed, 3 Apr 2013 07:31:19 GMT'}
{'version': 'v2', 'created': 'Tue, 16 Apr 2013 12:50:05 GMT'}]
|
2015-06-15
|
[array(['Boyer', 'Rémy', ''], dtype=object)
array(['Korso', 'Mohammed Nabil El', ''], dtype=object)
array(['Renaux', 'Alexandre', ''], dtype=object)
array(['Marcos', 'Sylvie', ''], dtype=object)]
|
4,522 |
2009.07382
|
Junjie Yang
|
Junjie Yang, Zhuosheng Zhang, Hai Zhao
|
Multi-span Style Extraction for Generative Reading Comprehension
|
AAAI-21 SDU Workshop
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Generative machine reading comprehension (MRC) requires a model to generate
well-formed answers. For this type of MRC, answer generation method is crucial
to the model performance. However, generative models, which are supposed to be
the right model for the task, in generally perform poorly. At the same time,
single-span extraction models have been proven effective for extractive MRC,
where the answer is constrained to a single span in the passage. Nevertheless,
they generally suffer from generating incomplete answers or introducing
redundant words when applied to the generative MRC. Thus, we extend the
single-span extraction method to multi-span, proposing a new framework which
enables generative MRC to be smoothly solved as multi-span extraction. Thorough
experiments demonstrate that this novel approach can alleviate the dilemma
between generative models and single-span models and produce answers with
better-formed syntax and semantics.
|
[{'version': 'v1', 'created': 'Tue, 15 Sep 2020 23:06:48 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Dec 2020 13:56:13 GMT'}]
|
2020-12-29
|
[array(['Yang', 'Junjie', ''], dtype=object)
array(['Zhang', 'Zhuosheng', ''], dtype=object)
array(['Zhao', 'Hai', ''], dtype=object)]
|
4,523 |
2005.10700
|
Hayden Helm
|
Hayden S. Helm, Amitabh Basu, Avanti Athreya, Youngser Park, Joshua T.
Vogelstein, Carey E. Priebe, Michael Winding, Marta Zlatic, Albert Cardona,
Patrick Bourke, Jonathan Larson, Marah Abdin, Piali Choudhury, Weiwei Yang,
Christopher W. White
|
Distance-based Positive and Unlabeled Learning for Ranking
|
21 pages, 5 figures
| null | null | null |
cs.LG cs.IR stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Learning to rank -- producing a ranked list of items specific to a query and
with respect to a set of supervisory items -- is a problem of general interest.
The setting we consider is one in which no analytic description of what
constitutes a good ranking is available. Instead, we have a collection of
representations and supervisory information consisting of a (target item,
interesting items set) pair. We demonstrate analytically, in simulation, and in
real data examples that learning to rank via combining representations using an
integer linear program is effective when the supervision is as light as "these
few items are similar to your item of interest." While this nomination task is
quite general, for specificity we present our methodology from the perspective
of vertex nomination in graphs. The methodology described herein is model
agnostic.
|
[{'version': 'v1', 'created': 'Wed, 20 May 2020 01:53:58 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Aug 2020 13:37:50 GMT'}
{'version': 'v3', 'created': 'Wed, 28 Sep 2022 16:24:42 GMT'}]
|
2022-09-29
|
[array(['Helm', 'Hayden S.', ''], dtype=object)
array(['Basu', 'Amitabh', ''], dtype=object)
array(['Athreya', 'Avanti', ''], dtype=object)
array(['Park', 'Youngser', ''], dtype=object)
array(['Vogelstein', 'Joshua T.', ''], dtype=object)
array(['Priebe', 'Carey E.', ''], dtype=object)
array(['Winding', 'Michael', ''], dtype=object)
array(['Zlatic', 'Marta', ''], dtype=object)
array(['Cardona', 'Albert', ''], dtype=object)
array(['Bourke', 'Patrick', ''], dtype=object)
array(['Larson', 'Jonathan', ''], dtype=object)
array(['Abdin', 'Marah', ''], dtype=object)
array(['Choudhury', 'Piali', ''], dtype=object)
array(['Yang', 'Weiwei', ''], dtype=object)
array(['White', 'Christopher W.', ''], dtype=object)]
|
4,524 |
1710.07665
|
Kyounghee Kim
|
Jeffrey Diller, Kyounghee Kim
|
Entropy of real rational surface automorphisms
| null | null | null | null |
math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compare real and complex dynamics for automorphisms of rational surfaces
that are obtained by lifting \chg{some} quadratic birational maps of the plane.
In particular, we show how to exploit the existence of an invariant cubic curve
to understand how the real part of an automorphism acts on homology. We apply
this understanding to give examples where the entropy of the full (complex)
automorphism is the same as its real restriction. Conversely and by different
methods, we exhibit different examples where the entropy is strictly decreased
by restricting to the real part of the surface. Finally, we give an example of
a rational surface automorphism with positive entropy whose periodic cycles are
all real.
|
[{'version': 'v1', 'created': 'Fri, 20 Oct 2017 18:48:09 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Aug 2018 18:46:02 GMT'}]
|
2018-08-28
|
[array(['Diller', 'Jeffrey', ''], dtype=object)
array(['Kim', 'Kyounghee', ''], dtype=object)]
|
4,525 |
1612.05770
|
Draper Patrick
|
Michael Dine, Patrick Draper, Laurel Stephenson-Haskins, and Di Xu
|
$\theta$ and the $\eta^\prime$ in Large $N$ Supersymmetric QCD
|
20 pages; v2: references updated; v3: expanded introduction, accepted
for publication in JHEP
| null |
10.1007/JHEP05(2017)122
| null |
hep-th hep-lat hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the large $N$ $\theta$ dependence and the $\eta^\prime$ potential in
supersymmetric QCD with small soft SUSY-breaking terms. Known exact results in
SUSY QCD are found to reflect a variety of expectations from large $N$
perturbation theory, including the presence of branches and the behavior of
theories with matter (both with $N_f \ll N$ and $N_f \sim N$). However, there
are also striking departures from ordinary QCD and the conventional large $N$
description: instanton effects, when under control, are not exponentially
suppressed at large $N$, and branched structure in supersymmetric QCD is always
associated with approximate discrete symmetries. We suggest that these
differences motivate further study of large $N$ QCD on the lattice.
|
[{'version': 'v1', 'created': 'Sat, 17 Dec 2016 14:08:41 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Feb 2017 20:44:49 GMT'}
{'version': 'v3', 'created': 'Sun, 21 May 2017 17:40:18 GMT'}]
|
2017-08-23
|
[array(['Dine', 'Michael', ''], dtype=object)
array(['Draper', 'Patrick', ''], dtype=object)
array(['Stephenson-Haskins', 'Laurel', ''], dtype=object)
array(['Xu', 'Di', ''], dtype=object)]
|
4,526 |
1310.7345
|
Tobias Korn
|
R. Voelkl, M. Schwemmer, M. Griesbeck, S. A. Tarasenko, D. Schuh, W.
Wegscheider, C. Schueller, and T. Korn
|
Spin polarization, dephasing and photoinduced spin diffusion in
(110)-grown two-dimensional electron systems
|
10 pages, 6 figures
| null |
10.1103/PhysRevB.89.075424
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the optically induced spin polarization, spin dephasing and
diffusion in several high-mobility two-dimensional electron systems, which are
embedded in GaAs quantum wells grown on (110)-oriented substrates. The
experimental techniques comprise a two-beam magneto-optical spectroscopy system
and polarization-resolved photoluminescence. Under weak excitation conditions
at liquid-helium temperatures, we observe spin lifetimes above 100 ns in one of
our samples, which are reduced with increasing excitation density due to
additional, hole-mediated, spin dephasing. The spin dynamic is strongly
influenced by the carrier density and the ionization of remote donors, which
can be controlled by temperature and above-barrier illumination. The absolute
value of the average electron spin polarization in the samples is directly
observable in the circular polarization of photoluminescence collected under
circularly polarized excitation and reaches values of about 5 percent. Spin
diffusion is studied by varying the distance between pump and probe beams in
micro-spectroscopy experiments. We observe diffusion lengths above 100 $\mu$m
and, at high excitation intensity, a nonmonotonic dependence of the spin
polarization on the pump-probe distance.
|
[{'version': 'v1', 'created': 'Mon, 28 Oct 2013 08:58:14 GMT'}]
|
2015-06-17
|
[array(['Voelkl', 'R.', ''], dtype=object)
array(['Schwemmer', 'M.', ''], dtype=object)
array(['Griesbeck', 'M.', ''], dtype=object)
array(['Tarasenko', 'S. A.', ''], dtype=object)
array(['Schuh', 'D.', ''], dtype=object)
array(['Wegscheider', 'W.', ''], dtype=object)
array(['Schueller', 'C.', ''], dtype=object)
array(['Korn', 'T.', ''], dtype=object)]
|
4,527 |
1608.03691
|
Shinya Matsuzaki
|
Shinya Matsuzaki, Hiroshi Ohki, and Koichi Yamawaki
|
Dark Side of the Standard Model: Dormant New Physics Awaken
|
11 pages, 3 eps figures, further several discussions added
| null | null | null |
hep-ph astro-ph.CO hep-ex hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We find that the nonperturbative physics of the standard-model Higgs
Lagrangian provides a dark matter candidate, "dormant skyrmion in the standard
model", the same type of the skyrmion, a soliton, as in the hadron physics. It
is stabilized by another nonperturbative object in the standard model, the
dynamical gauge boson of the hidden local symmetry, which is also an analogue
of the rho meson.
|
[{'version': 'v1', 'created': 'Fri, 12 Aug 2016 07:09:42 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Feb 2017 09:27:30 GMT'}
{'version': 'v3', 'created': 'Thu, 11 May 2017 19:45:06 GMT'}]
|
2017-05-15
|
[array(['Matsuzaki', 'Shinya', ''], dtype=object)
array(['Ohki', 'Hiroshi', ''], dtype=object)
array(['Yamawaki', 'Koichi', ''], dtype=object)]
|
4,528 |
1806.05199
|
Alexandre de Siqueira
|
Alexandre Fioravante de Siqueira and Wagner Massayuki Nakasuga and
Sandro Guedes
|
Skeletracks: automatic separation of overlapping fission tracks in
apatite and muscovite using image processing
|
14 pages, 10 figures
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One of the major difficulties of automatic track counting using
photomicrographs is separating overlapped tracks. We address this issue
combining image processing algorithms such as skeletonization, and we test our
algorithm with several binarization techniques. The counting algorithm was
successfully applied to determine the efficiency factor GQR, necessary for
standardless fission-track dating, involving counting induced tracks in apatite
and muscovite with superficial densities of about $6 \times 10^5$
tracks/$cm^2$.
|
[{'version': 'v1', 'created': 'Wed, 13 Jun 2018 18:03:47 GMT'}
{'version': 'v2', 'created': 'Tue, 18 Dec 2018 20:59:40 GMT'}]
|
2018-12-20
|
[array(['de Siqueira', 'Alexandre Fioravante', ''], dtype=object)
array(['Nakasuga', 'Wagner Massayuki', ''], dtype=object)
array(['Guedes', 'Sandro', ''], dtype=object)]
|
4,529 |
1310.6862
|
Paola Magrone
|
Paola Magrone
|
Minimax solutions for a problem with sign changing nonlinearity and lack
of strict convexity
|
15 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A result of existence of a nonnegative and a nontrivial solution is proved
via critical point theorems for non smooth functionals. The equation considered
presents a convex part and a nonlinearity which changes sign.
|
[{'version': 'v1', 'created': 'Fri, 25 Oct 2013 09:38:20 GMT'}]
|
2013-10-28
|
[array(['Magrone', 'Paola', ''], dtype=object)]
|
4,530 |
2111.09933
|
Ruijiang Gao
|
Max Biggs, Ruijiang Gao, Wei Sun
|
Loss Functions for Discrete Contextual Pricing with Observational Data
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a pricing setting where each customer is offered a contextualized
price based on customer and/or product features. Often only historical sales
data are available, so we observe whether a customer purchased a product at the
price prescribed rather than the customer's true valuation. Such observational
data are influenced by historical pricing policies, which introduce
difficulties in evaluating the effectiveness of future policies. The goal of
this paper is to formulate loss functions that can be used for evaluating
pricing policies directly from observational data, rather than going through an
intermediate demand estimation stage, which may suffer from bias. To achieve
this, we adapt ideas from machine learning with corrupted labels, where we
consider each observed purchase decision as a known probabilistic
transformation of the customer's valuation. From this transformation, we derive
a class of unbiased loss functions. Within this class, we identify minimum
variance estimators and estimators robust to poor demand estimation.
Furthermore, we show that for contextual pricing, estimators popular in the
off-policy evaluation literature fall within this class of loss functions. We
offer managerial insights into scenarios under which these estimators are
effective.
|
[{'version': 'v1', 'created': 'Thu, 18 Nov 2021 20:12:57 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Feb 2023 20:55:08 GMT'}]
|
2023-02-24
|
[array(['Biggs', 'Max', ''], dtype=object)
array(['Gao', 'Ruijiang', ''], dtype=object)
array(['Sun', 'Wei', ''], dtype=object)]
|
4,531 |
cond-mat/9806359
|
David Meyer
|
David A. Meyer and Thad A. Brown
|
Statistical mechanics of voting
|
9 pages, plain TeX, 2 PostScript figures included with epsf.tex
(ignore the under/overfull \vbox error messages)
| null |
10.1103/PhysRevLett.81.1718
| null |
cond-mat.stat-mech chao-dyn nlin.CD
| null |
Decision procedures aggregating the preferences of multiple agents can
produce cycles and hence outcomes which have been described heuristically as
`chaotic'. We make this description precise by constructing an explicit
dynamical system from the agents' preferences and a voting rule. The dynamics
form a one dimensional statistical mechanics model; this suggests the use of
the topological entropy to quantify the complexity of the system. We formulate
natural political/social questions about the expected complexity of a voting
rule and degree of cohesion/diversity among agents in terms of random matrix
models---ensembles of statistical mechanics models---and compute quantitative
answers in some representative cases.
|
[{'version': 'v1', 'created': 'Mon, 29 Jun 1998 22:43:42 GMT'}]
|
2009-10-31
|
[array(['Meyer', 'David A.', ''], dtype=object)
array(['Brown', 'Thad A.', ''], dtype=object)]
|
4,532 |
1704.05885
|
Talukder Jubery
|
Talukder Z. Jubery, Baskar Ganapathysubramanian, Matthew E. Gilbert,
and Daniel Attinger
|
Integrating optimization with thermodynamics and plant physiology for
crop ideotype design
| null | null | null | null |
physics.bio-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A computational framework integrating optimization algorithms, parallel
computing and plant physiology was developed to explore crop ideotype design.
The backbone of the framework is a plant physiology model that accurately
tracks water use (i.e. a plant hydraulic model) coupled with mass transport
(CO2 exchange and transport), energy conversion (leaf temperature due to
radiation, convection and mass transfer) and photosynthetic biochemistry of an
adult maize plant. For a given trait configuration, soil parameters and hourly
weather data, the model computes water use and photosynthetic output over the
life of an adult maize plant. We coupled this validated model with a parallel,
meta-heuristic optimization algorithm, specifically a genetic algorithm (GA),
to identify trait sets (ideotypes) that resulted in desired water use behavior
of the adult maize plant. We detail features of the model as well as the
implementation details of the coupling with the optimization framework and
deployment on high performance computing platforms. We illustrate a
representative result of this framework by identifying maize ideotypes with
optimized photosynthetic yields using weather and soil conditions corresponding
to Davis, CA. Finally, we show how the framework can be used to identify broad
ideotype trends that can inform breeding efforts. The developed presented tool
has the potential to inform the development of future climate-resilient crops.
|
[{'version': 'v1', 'created': 'Wed, 19 Apr 2017 18:27:10 GMT'}]
|
2017-04-21
|
[array(['Jubery', 'Talukder Z.', ''], dtype=object)
array(['Ganapathysubramanian', 'Baskar', ''], dtype=object)
array(['Gilbert', 'Matthew E.', ''], dtype=object)
array(['Attinger', 'Daniel', ''], dtype=object)]
|
4,533 |
1001.0869
|
Petr Nemec
|
D. Sprinzl, P. Horodyska, E. Belas, R. Grill, P. Maly, and P. Nemec
|
Systematic investigation of influence of n-type doping on electron spin
dephasing in CdTe
|
8 pages, 2 figures; accepted in Phys. Rev. B
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We used time-resolved Kerr rotation technique to study the electron spin
coherence in a comprehensive set of bulk CdTe samples with various
concentrations of electrons that were supplied by n-type doping. The electron
spin coherence time of 40 ps was observed at temperature of 7 K in p-type CdTe
and in n-type CdTe with a low concentration of electrons. The increase of the
concentration of electrons leads to a substantial prolongation of the spin
coherence time, which can be as long as 2.5 ns at 7 K in optimally doped
samples, and to a modification of the g factor of electrons. The influence of
the concentration of electrons is the most pronounced at low temperatures but
it has a sizable effect also at room temperature. The optimal concentration of
electrons to achieve the longest spin coherence time is 17-times higher in CdTe
than in GaAs and the maximal low-temperature value of the spin coherence time
in CdTe is 70 times shorter than the corresponding value in GaAs. Our data can
help in cross-checking the predictions of various theoretical models that were
suggested in literature as an explanation of the observed non-monotonous doping
dependence of the electron spin coherence time in GaAs.
|
[{'version': 'v1', 'created': 'Wed, 6 Jan 2010 11:38:34 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Sep 2010 07:21:16 GMT'}]
|
2010-09-17
|
[array(['Sprinzl', 'D.', ''], dtype=object)
array(['Horodyska', 'P.', ''], dtype=object)
array(['Belas', 'E.', ''], dtype=object)
array(['Grill', 'R.', ''], dtype=object)
array(['Maly', 'P.', ''], dtype=object)
array(['Nemec', 'P.', ''], dtype=object)]
|
4,534 |
astro-ph/9907006
|
Alexander Potekhin
|
A.Y. Potekhin (1), G. Chabrier (2), Yu.A. Shibanov (1) ((1) Ioffe
Phys.-Tech. Inst., St.Petersburg; (2) CRAL, ENS-Lyon)
|
Partially ionized hydrogen plasma in strong magnetic fields
|
17 pages, 11 figures (embedded using epsf.sty), REVTeX3. V2: two
curves on the right panel of Fig. 8 are corrected. V3: a misprint (missed
brackets) in Eq. (55) is corrected
|
Phys.Rev. E60 (1999) 2193
|
10.1103/PhysRevE.60.2193
| null |
astro-ph physics.plasm-ph
| null |
We study the thermodynamic properties of a partially ionized hydrogen plasma
in strong magnetic fields, B ~ 10^{12}-10^{13} G, typical of neutron stars. The
properties of the plasma depend significantly on the quantum-mechanical sizes
and binding energies of the atoms, which are strongly modified by thermal
motion across the field. We use new fitting formulas for the atomic binding
energies and sizes, based on accurate numerical calculations and valid for any
state of motion of the atom. In particular, we take into account decentered
atomic states, neglected in previous studies of thermodynamics of magnetized
plasmas. We also employ analytic fits for the thermodynamic functions of
nonideal fully ionized electron-ion Coulomb plasmas. This enables us to
construct an analytic model of the free energy. An ionization equilibrium
equation is derived, taking into account the strong magnetic field effects and
the nonideality effects. This equation is solved by an iteration technique.
Ionization degrees, occupancies, and the equation of state are calculated.
|
[{'version': 'v1', 'created': 'Thu, 1 Jul 1999 10:53:35 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Aug 2000 11:13:38 GMT'}
{'version': 'v3', 'created': 'Sun, 21 Apr 2002 19:31:12 GMT'}]
|
2007-05-23
|
[array(['Potekhin', 'A. Y.', ''], dtype=object)
array(['Chabrier', 'G.', ''], dtype=object)
array(['Shibanov', 'Yu. A.', ''], dtype=object)]
|
4,535 |
cs/0605072
|
Wei Wu
|
Wei Wu, Sriram Vishwanath and Ari Arapostathis
|
On the Capacity of Gaussian Weak Interference Channels with Degraded
Message sets
|
This paper appears in CISS 2006, Princeton, NJ
| null | null | null |
cs.IT math.IT
| null |
This paper is motivated by a sensor network on a correlated field where
nearby sensors share information, and can thus assist rather than interfere
with one another. We consider a special class of two-user Gaussian interference
channels (IFCs) where one of the two transmitters knows both the messages to be
conveyed to the two receivers. Both achievability and converse arguments are
provided for a channel with Gaussian inputs and Gaussian noise when the
interference is weaker than the direct link (a so called weak IFC). In general,
this region serves as an outer bound on the capacity of weak IFCs with no
shared knowledge between transmitters.
|
[{'version': 'v1', 'created': 'Wed, 17 May 2006 07:34:50 GMT'}]
|
2007-07-13
|
[array(['Wu', 'Wei', ''], dtype=object)
array(['Vishwanath', 'Sriram', ''], dtype=object)
array(['Arapostathis', 'Ari', ''], dtype=object)]
|
4,536 |
1405.4296
|
Andrei Lavrenov
|
Andrei Lavrenov
|
Another presentation for symplectic Steinberg groups
| null | null | null | null |
math.KT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We solve a classical problem of centrality of symplectic $\mathrm K_2$,
namely we show that for an arbitrary commutative ring $R$, $l\geq3$ the
symplectic Steinberg group $\mathrm{StSp}(2l,\,R)$ as an extension of the
elementary symplectic group $\mathrm{Ep}(2l,\,R)$ is a central extension. This
allows to conclude that the explicit definition of symplectic
$\mathrm{K_2Sp}(2l,\,R)$ as a kernel of this extension, i.e. as a group of
non-elementary relations among symplectic transvections, coincides with the
usual implicit definition via plus-construction. We proceed from van der
Kallen's classical paper, where he shows an analogous result for linear
K-theory. We find a new set of generators for the symplectic Steinberg group
and a defining system of relations among them. In this new presentation it is
obvious that the symplectic Steinberg group is a central extension.
|
[{'version': 'v1', 'created': 'Fri, 16 May 2014 20:02:23 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Dec 2014 05:15:25 GMT'}]
|
2014-12-12
|
[array(['Lavrenov', 'Andrei', ''], dtype=object)]
|
4,537 |
cond-mat/0410698
|
Gavrilov Sergey
|
V.P.Plakhty, L.P.Regnault, A.V.Goltsev, S.V.Gavrilov, F.Yakhou,
J.Flouquet, C.Vettier, S.Kunii
|
Itinerant magnetism in Kondo crystal CeB6 as indicated by polarized
neutron scattering
|
4 pages, 3 figures
| null |
10.1103/PhysRevB.71.100407
| null |
cond-mat.str-el
| null |
A magnetic Bragg reflection corresponding to the wave vector k13 =
(2pi/a)[1/2,1/2,1/2] of the antiferro-quadrupolar ordering is found in CeB6 in
zero magnetic field below the Neel temperature TN. Its intensity is two orders
of magnitude weaker than those due to the basic magnetic structure [O. Zaharko
et al., Phys. Rev. B 68, 214401 (2003)]. The peak has a width of the other
Bragg reflections below TN, but widens abruptly at T = TN with simultaneous
increase of intensity. Correlation length just above TN is of the order of 70
A. The peak intensity decreases to zero at T = 7 K with no visible anomaly at
the antiferro-quadrupolar ordering temperature TQ = 3.3 K. The features of this
magnetic ordering are typical for the itinerant magnetism with 5d electron of
Ce3+ [Yu.S. Grushko et al., phys. stat. sol. (b) 128, 591 (1985)] being
involved.
|
[{'version': 'v1', 'created': 'Wed, 27 Oct 2004 11:00:35 GMT'}]
|
2009-11-10
|
[array(['Plakhty', 'V. P.', ''], dtype=object)
array(['Regnault', 'L. P.', ''], dtype=object)
array(['Goltsev', 'A. V.', ''], dtype=object)
array(['Gavrilov', 'S. V.', ''], dtype=object)
array(['Yakhou', 'F.', ''], dtype=object)
array(['Flouquet', 'J.', ''], dtype=object)
array(['Vettier', 'C.', ''], dtype=object)
array(['Kunii', 'S.', ''], dtype=object)]
|
4,538 |
0806.0596
|
Gopal Prasad
|
Gopal Prasad and Andrei S. Rapinchuk
|
Local-global principles for embedding of fields with involution into
simple algebras with involution
| null | null | null | null |
math.NT math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we prove local-global principles for embedding of fields with
involution into central simple algebras with involution over a global field.
These should be of interest in study of classical groups over global fields. We
deduce from our results that in a group of type D_n, n>4 even, two weakly
commensurable Zariski-dense S-arithmetic subgroups are actually commensurable.
A consequence of this result is that given an absolutely simple algebraic
K-group G of type D_n, n>4 even, K a number field, any K-form G' of G having
the same set of isomorphism classes of maximal K-tori as G, is necessarily
K-isomorphic to G. These results lead to results about isolength and
isospectral compact hyperbolic spaces of dimension 2n-1 with n even.
|
[{'version': 'v1', 'created': 'Tue, 3 Jun 2008 17:13:11 GMT'}
{'version': 'v2', 'created': 'Wed, 18 Jun 2008 14:56:45 GMT'}
{'version': 'v3', 'created': 'Wed, 8 Oct 2008 15:43:51 GMT'}
{'version': 'v4', 'created': 'Mon, 27 Oct 2008 14:39:39 GMT'}
{'version': 'v5', 'created': 'Thu, 2 Jul 2009 16:38:29 GMT'}]
|
2009-07-02
|
[array(['Prasad', 'Gopal', ''], dtype=object)
array(['Rapinchuk', 'Andrei S.', ''], dtype=object)]
|
4,539 |
2204.08756
|
Stanislav Baturin
|
S.S. Baturin
|
Flat bubble regime and laminar plasma flow in a plasma wake field
accelerator
|
9 pages 5 Figures
| null |
10.1103/PhysRevAccelBeams.25.081301
| null |
physics.plasm-ph physics.acc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A simple 2D model of the bubble formation in a plasma wakefield accelerator
is developed and investigated. It is shown that in the case of a flat driver
the bubble may consist of two parts that correspond to two different types of
the plasma flow: a laminar flow where plasma electron streams do not cross and
a two-stream (turbulent) flow. The laminar flow turns out to be robust to the
symmetry breaking. Building-of of the developed model we demonstrate that in
the case of the laminar flow and non-relativistic plasma electrons the
transverse wake field is absent inside the bubble even in the case of a
transversely nonuniform plasma.
|
[{'version': 'v1', 'created': 'Tue, 19 Apr 2022 08:53:37 GMT'}]
|
2022-08-31
|
[array(['Baturin', 'S. S.', ''], dtype=object)]
|
4,540 |
1710.01282
|
David Radice
|
David Radice and Ernazar Abdikamalov and Christian D. Ott and Philipp
Moesta and Sean M. Couch and Luke F. Roberts
|
Turbulence in Core-Collapse Supernovae
|
27 pages, 8 figures. Invited review for J. Phys. G special issue:
"Focus on microphysics in core-collapse supernovae: 30 years since SN1987A".
Accepted version
|
J. Phys. G: Nucl. Part. Phys. 45 (2018) 053003
|
10.1088/1361-6471/aab872
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multidimensional simulations show that non-radial, turbulent, fluid motion is
a fundamental component of the core-collapse supernova (CCSN) explosion
mechanism. Neutrino-driven convection, the standing accretion shock
instability, and relic-perturbations from advanced stages of nuclear burning
can all impact the outcome of core collapse in a qualitative and quantitative
way. Here, we review the current understanding of these phenomena and their
role in the explosion of massive stars. We also discuss the role of
protoneutron star convection and of magnetic fields in the context of the
delayed neutrino mechanism.
|
[{'version': 'v1', 'created': 'Tue, 3 Oct 2017 17:25:13 GMT'}
{'version': 'v2', 'created': 'Fri, 23 Mar 2018 14:17:30 GMT'}]
|
2018-04-10
|
[array(['Radice', 'David', ''], dtype=object)
array(['Abdikamalov', 'Ernazar', ''], dtype=object)
array(['Ott', 'Christian D.', ''], dtype=object)
array(['Moesta', 'Philipp', ''], dtype=object)
array(['Couch', 'Sean M.', ''], dtype=object)
array(['Roberts', 'Luke F.', ''], dtype=object)]
|
4,541 |
1104.4927
|
Xiao Ma
|
Xiao Ma, Kai Zhang, Baoming Bai and Xiaoyi Zhang
|
Serial Concatenation of RS Codes with Kite Codes: Performance Analysis,
Iterative Decoding and Design
|
34 pages, 15 figures
| null | null | null |
cs.IT cs.PF math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we propose a new ensemble of rateless forward error correction
(FEC) codes. The proposed codes are serially concatenated codes with
Reed-Solomon (RS) codes as outer codes and Kite codes as inner codes. The inner
Kite codes are a special class of prefix rateless low-density parity-check
(PRLDPC) codes, which can generate potentially infinite (or as many as
required) random-like parity-check bits. The employment of RS codes as outer
codes not only lowers down error-floors but also ensures (with high
probability) the correctness of successfully decoded codewords. In addition to
the conventional two-stage decoding, iterative decoding between the inner code
and the outer code are also implemented to improve the performance further. The
performance of the Kite codes under maximum likelihood (ML) decoding is
analyzed by applying a refined Divsalar bound to the ensemble weight
enumerating functions (WEF). We propose a simulation-based optimization method
as well as density evolution (DE) using Gaussian approximations (GA) to design
the Kite codes. Numerical results along with semi-analytic bounds show that the
proposed codes can approach Shannon limits with extremely low error-floors. It
is also shown by simulation that the proposed codes performs well within a wide
range of signal-to-noise-ratios (SNRs).
|
[{'version': 'v1', 'created': 'Tue, 26 Apr 2011 14:05:51 GMT'}]
|
2011-04-27
|
[array(['Ma', 'Xiao', ''], dtype=object)
array(['Zhang', 'Kai', ''], dtype=object)
array(['Bai', 'Baoming', ''], dtype=object)
array(['Zhang', 'Xiaoyi', ''], dtype=object)]
|
4,542 |
astro-ph/0112530
|
Megan Donahue
|
Megan Donahue, Jennifer Mack, Caleb Scharf, Paul Lee, Marc Postman,
Piero Rosati, Mark Dickinson, G. Mark Voit, John T. Stocke
|
Distant Cluster Hunting I: A Comparison Between the Optical and X-ray
Luminosity Functions from an Optical/X-ray Survey
|
11 pages, 3 figures. ApJ Letters published
|
2001 ApJ Letters 552, L93-L96
|
10.1086/320334
| null |
astro-ph
| null |
We present a comparison of X-ray and optical luminosities and luminosity
functions of cluster candidates from a joint optical/X-ray survey, the ROSAT
Optical X-Ray Survey. Completely independent X-ray and optical catalogs of 23
ROSAT fields (4.8 deg2) were created by a matched-filter optical algorithm and
by a wavelet technique in the X-ray. We directly compare the results of the
optical and X-ray selection techniques. The matched-filter technique detected
74% (26 out of 35) of the most reliable cluster candidates in the
X-ray-selected sample; the remainder could be either constellations of X-ray
point sources or z>1 clusters. The matched-filter technique identified
approximately 3 times the number of candidates (152 candidates) found in the
X-ray survey of nearly the same sky (57 candidates). While the estimated
optical and X-ray luminosities of clusters of galaxies are correlated, the
intrinsic scatter in this relationship is very large. We can reproduce the
number and distribution of optical clusters with a model defined by the X-ray
luminosity function and by an LX Lambda cl relation if H0=75 km s-1 Mpc-1 and
if the LX Lambda cl relation is steeper than the expected LX Lambda 2cl. On
statistical grounds, a bimodal distribution of X-ray luminous and X-ray faint
clusters is unnecessary to explain our observations. Follow-up work is required
to confirm whether the clusters without bright X-ray counterparts are simply
X-ray faint for their optical luminosity because of their low mass or youth or
are a distinct population of clusters that do not, for some reason, have dense
intracluster media. We suspect that these optical clusters are low-mass
systems, with correspondingly low X-ray temperatures and luminosities, or that
they are not yet completely virialized systems.
|
[{'version': 'v1', 'created': 'Fri, 21 Dec 2001 22:45:15 GMT'}]
|
2009-11-07
|
[array(['Donahue', 'Megan', ''], dtype=object)
array(['Mack', 'Jennifer', ''], dtype=object)
array(['Scharf', 'Caleb', ''], dtype=object)
array(['Lee', 'Paul', ''], dtype=object)
array(['Postman', 'Marc', ''], dtype=object)
array(['Rosati', 'Piero', ''], dtype=object)
array(['Dickinson', 'Mark', ''], dtype=object)
array(['Voit', 'G. Mark', ''], dtype=object)
array(['Stocke', 'John T.', ''], dtype=object)]
|
4,543 |
hep-th/0702212
|
Stephon Alexander
|
Stephon Alexander
|
The Hubble Web: The Dark Matter Problem and Cosmic Strings
|
5 pages
|
AIP Conf.Proc.1140:46-53,2009
|
10.1063/1.3183527
| null |
hep-th astro-ph
| null |
I propose a reinterpretation of cosmic dark matter in which a rigid network
of cosmic strings formed at the end of inflation. The cosmic strings fulfill
three functions: At recombination they provide an accretion mechanism for
virializing baryonic and warm dark matter into disks. These cosmic strings
survive as configurations which thread spiral and elliptical galaxies leading
to the observed flatness of rotation curves and the Tully-Fisher relation. We
find a relationship between the rotational velocity of the galaxy and the
string tension and discuss the testability of this model.
|
[{'version': 'v1', 'created': 'Tue, 27 Feb 2007 15:48:25 GMT'}]
|
2009-07-22
|
[array(['Alexander', 'Stephon', ''], dtype=object)]
|
4,544 |
2212.14423
|
Zihui He
|
Zihui He
|
Three-dimensional stationary incompressible inhomogeneous Navier-Stokes
equation in the axially symmetric case
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show the existence of (a class of) weak solutions to the three-dimensional
stationary incompressible inhomogeneous Navier--Stokes equations with
density-dependent viscosity coefficient in the axially symmetric case. Further
symmetric solutions in cylindrical coordinates, spherical coordinates and
Cartesian coordinates are also discussed.
|
[{'version': 'v1', 'created': 'Thu, 29 Dec 2022 18:52:51 GMT'}]
|
2023-01-02
|
[array(['He', 'Zihui', ''], dtype=object)]
|
4,545 |
2108.11373
|
Pablo M. Saz Parkinson
|
V. A. Acciari (1), S. Ansoldi (2), L. A. Antonelli (3), A. Arbet
Engels (4), M. Artero (5), K. Asano (6), D. Baack (7), A. Babi\'c (8), A.
Baquero (9), U. Barres de Almeida (10), J. A. Barrio (9), I. Batkovi\'c (11),
J. Becerra Gonz\'alez (1), W. Bednarek (12), L. Bellizzi (13), E. Bernardini
(14), M. Bernardos (11), A. Berti (15), J. Besenrieder (16), W. Bhattacharyya
(14), C. Bigongiari (3), A. Biland (4), O. Blanch (5), G. Bonnoli (13),
\v{Z}. Bo\v{s}njak (8), G. Busetto (11), R. Carosi (17), G. Ceribella (16),
M. Cerruti (18), Y. Chai (16), A. Chilingarian, S. Cikota (8), S. M. Colak
(5), E. Colombo (1), J. L. Contreras (9), J. Cortina (20), S. Covino (3), G.
D'Amico (16), V. D'Elia (3), P. Da Vela (17 now at 21), F. Dazzi (3), A. De
Angelis (11), B. De Lotto (2), M. Delfino (5 and 22), J. Delgado (5 and 22),
C. Delgado Mendez (20), D. Depaoli (15), F. Di Pierro (15), L. Di Venere
(23), E. Do Souto Espi\~neira (5), D. Dominis Prester (24), A. Donini (2), D.
Dorner (25), M. Doro (11), D. Elsaesser (7), V. Fallah Ramazani (26 now at
27), A. Fattorini (7), G. Ferrara (3), M. V. Fonseca (9), L. Font (28), C.
Fruck (16), S. Fukami (6), R. J. Garc\'ia L\'opez (1), M. Garczarczyk (14),
S. Gasparyan (29), M. Gaug (28), N. Giglietto (23), F. Giordano (23), P.
Gliwny (12), N. Godinovi\'c (30), J. G. Green (3), D. Green (16), D. Hadasch
(6), A. Hahn (16), L. Heckmann (16), J. Herrera (1), J. Hoang (9), D. Hrupec
(31), M. H\"utten (16), T. Inada (6), S. Inoue (32), K. Ishio (16), Y.
Iwamura (6), I. Jim\'enez (20), J. Jormanainen (26), L. Jouvin (5), Y.
Kajiwara (33), M. Karjalainen (1), D. Kerszberg (5), Y. Kobayashi (6), H.
Kubo (33), J. Kushida (34), A. Lamastra (3), D. Lelas (30), F. Leone (3), E.
Lindfors (26), S. Lombardi (3), F. Longo (2), R. L\'opez-Coto (11), M.
L\'opez-Moya (9), A. L\'opez-Oramas (1), S. Loporchio (23), B. Machado de
Oliveira Fraga (10), C. Maggio (28), P. Majumdar (35), M. Makariev (36), M.
Mallamaci (11), G. Maneva (36), M. Manganaro (24), K. Mannheim (25),
L.Maraschi (3), M. Mariotti (11), M. Mart\'inez (5), D. Mazin (7 and 16), S.
Menchiari (13), S. Mender (7), S. Mi\'canovi\'c (24), D. Miceli (2), T.
Miener (9), M. Minev (36), J. M. Miranda (13), R. Mirzoyan (16), E. Molina
(18), A. Moralejo (5), D. Morcuende (9), V. Moreno (28), E. Moretti (5), V.
Neustroev (37), C. Nigro (5), K. Nilsson (26), K. Nishijima (34), K. Noda
(6), S. Nozaki (33), Y. Ohtani (6), T. Oka (33), J. Otero Santos (1), S.
Paiano (3), M. Palatiello (2), D. Paneque (16), R. Paoletti (13), J. M.
Paredes (18), L. Pavleti\'c (24), P. Pe\~nil (9), C. Perennes (11), M. Persic
(2 and 38), P. G. Prada Moroni (17), E. Prandini (11), C. Priyadarshi (5),
I.Puljak (30), W. Rhode (7), M. Rib\'o (18), J. Rico (5), C. Righi (3), A.
Rugliancich (17), L. Saha (9), N. Sahakyan (29), T. Saito (6), S. Sakurai
(6), K. Satalecka (14), F. G. Saturni (3), B. Schleicher (25), K. Schmidt
(7), T. Schweizer (16), J. Sitarek (12), I. \v{S}nidari\'c (8), D. Sobczynska
(12), A. Spolon (11), A. Stamerra (3), D. Strom (16), M. Strzys (6), Y. Suda
(16), T. Suri\'c (8), M. Takahashi (6), F. Tavecchio (3), P. Temnikov (36),
T. Terzi\'c (24), M. Teshima (6), L. Tosti (39), S. Truzzi (13), A. Tutone
(3), S. Ubach (28), J. van Scherpenberg (16), G. Vanzo (1), M. Vazquez Acosta
(1), S. Ventura (13), V. Verguilov (36), C. F. Vigorito (15), V. Vitale (40),
I. Vovk (6), M. Will (16), C. Wunderlich (13), D. Zari\'c (30) (the MAGIC
Collaboration), and P. A. Caraveo (41), I. Cognard (42 and 43), L. Guillemot
(42 and 43), A. K. Harding (44), J. Li (45 and 46), B. Limyansky (47), C. Y.
Ng (48 and 49), D. F. Torres (50, 51, and 52), and P. M. Saz Parkinson
(47,48, and 49) ((1) Inst. de Astrof\'isica de Canarias, La Laguna, Tenerife,
Spain, (2) Universit\`a di Udine and INFN Trieste, Udine, Italy, (3) National
Institute for Astrophysics (INAF), Rome, Italy, (4) ETH Z\"urich, Z\"urich,
Switzerland, (5) Institut de F\'isica d'Altes Energies (IFAE), The Barcelona
Institute of Science and Technology (BIST), Bellaterra (Barcelona), Spain,
(6) Japanese MAGIC Group: Institute for Cosmic Ray Research (ICRR), The
University of Tokyo, Chiba, Japan, (7) Technische Universit\"at Dortmund,
Dortmund, Germany, (8) Croatian MAGIC Group: University of Zagreb, Zagreb,
Croatia, (9) IPARCOS Institute and EMFTEL Department, Universidad Complutense
de Madrid, Madrid, Spain, (10) Centro Brasileiro de Pesquisas F\'isicas
(CBPF), Rio de Janeiro (RJ), Brazil, (11) Universit\`a di Padova and INFN,
Padova, Italy, (12) University of Lodz, Faculty of Physics and Applied
Informatics, Department of Astrophysics, Lodz, Poland, (13) Universit\`a di
Siena and INFN Pisa, Siena, Italy, (14) Deutsches Elektronen-Synchrotron
(DESY), Zeuthen, Germany, (15) INFN MAGIC Group: INFN Sezione di Torino and
Universit\`a degli Studi di Torino, Torino, Italy, (16) Max-Planck-Institut
f\"ur Physik, M\"unchen, Germany, (17) Universit\`a di Pisa and INFN Pisa,
Pisa, Italy, (18) Universitat de Barcelona, ICCUB, IEEC-UB, Barcelona, Spain,
(19) Armenian MAGIC Group: A. Alikhanyan National Science Laboratory, (20)
Centro de Investigaciones Energ\'eticas, Medioambientales y Tecnol\'ogicas,
Madrid, Spain, (21) University of Innsbruck, Innsbruck, Austria, (22) Port
d'Informaci\'o Cient\'ifica (PIC), Bellaterra (Barcelona), Spain, (23) INFN
MAGIC Group: INFN Sezione di Bari and Dipartimento Interateneo di Fisica
dell'Universit\`a e del Politecnico di Bari, Bari, Italy, (24) Croatian MAGIC
Group: University of Rijeka, Department of Physics, Rijeka, Croatia, (25)
Universit\"at W\"urzburg, W\"urzburg, Germany, (26) Finnish MAGIC Group:
Finnish Centre for Astronomy with ESO, University of Turku, Turku, Finland
(27) Ruhr-Universit\"at Bochum, Fakult\"at f\"ur Physik und Astronomie,
Astronomisches Institut (AIRUB), Bochum, Germany, (28) Departament de
F\'isica, and CERES-IEEC, Universitat Aut\`onoma de Barcelona, Bellaterra,
Spain, (29) Armenian MAGIC Group: ICRANet-Armenia at NAS RA, (30) Croatian
MAGIC Group: University of Split, Faculty of Electrical Engineering,
Mechanical Engineering and Naval Architecture (FESB), Split, Croatia, (31)
Croatian MAGIC Group: Josip Juraj Strossmayer University of Osijek,
Department of Physics, Osijek, Croatia, (32) Japanese MAGIC Group: RIKEN,
Wako, Saitama, Japan, (33) Japanese MAGIC Group: Department of Physics, Kyoto
University, Kyoto, Japan, (34) Japanese MAGIC Group: Department of Physics,
Tokai University, Kanagawa, Japan, (35) Saha Institute of Nuclear Physics,
Kolkata, India, (36) Inst. for Nucl. Research and Nucl. Energy, Bulgarian
Academy of Sciences, Sofia, Bulgaria, (37) Finnish MAGIC Group: Astronomy
Research Unit, University of Oulu, Oulu, Finland, (38) INAF Trieste and Dept.
of Physics and Astronomy, University of Bologna, (39) INFN MAGIC Group: INFN
Sezione di Perugia, Perugia, Italy, (40) INFN MAGIC Group: INFN Roma Tor
Vergata, Roma, Italy, (41) INAF-Istituto di Astrofisica Spaziale e Fisica
Cosmica Milano, Milano, Italy, (42) Laboratoire de Physique et Chimie de
l'Environnement et de l'Espace -- Universit\'e d'Orl\'eans, Orl\'eans,
France, (43) Station de radioastronomie de Nan\c{c}ay, Observatoire de Paris,
Nan\c{c}ay, France, (44) NASA Goddard Space Flight Center, Greenbelt, MD,
USA, (45) CAS Key Laboratory for Research in Galaxies and Cosmology,
Department of Astronomy, University of Science and Technology of China,
Hefei, People's Republic of China, (46) School of Astronomy and Space
Science, University of Science and Technology of China, Hefei, People's
Republic of China, (47) Santa Cruz Institute for Particle Physics, Department
of Physics, University of California at Santa Cruz, Santa Cruz, CA, USA, (48)
Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong,
China, (49) Laboratory for Space Research, The University of Hong Kong, Hong
Kong, China, (50) Institute of Space Sciences (ICE, CSIC), Campus UAB,
Barcelona, Spain, (51) Institut d'Estudis Espacials de Catalunya (IEEC),
Barcelona, Spain, (52) Instituci\'o Catalana de Recerca i Estudis
Avan\c{c}ats (ICREA), Barcelona, Spain)
|
Search for Very High-Energy Emission from the millisecond pulsar PSR
J0218+4232
|
19 pages, 9 figures, Accepted to ApJ
| null |
10.3847/1538-4357/ac20d7
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
PSR J0218+4232 is one of the most energetic millisecond pulsars known and has
long been considered as one of the best candidates for very high-energy (VHE;
>100 GeV) gamma-ray emission. Using 11.5 years of Fermi Large Area Telescope
(LAT) data between 100 MeV and 870 GeV, and ~90 hours of MAGIC observations in
the 20 GeV to 20 TeV range, we have searched for the highest energy gamma-ray
emission from PSR J0218+4232. Based on the analysis of the LAT data, we find
evidence for pulsed emission above 25 GeV, but see no evidence for emission
above 100 GeV (VHE) with MAGIC. We present the results of searches for
gamma-ray emission, along with theoretical modeling, to interpret the lack of
VHE emission. We conclude that, based on the experimental observations and
theoretical modeling, it will remain extremely challenging to detect VHE
emission from PSR J0218+4232 with the current generation of Imaging Atmospheric
Cherenkov Telescopes (IACTs), and maybe even with future ones, such as the
Cherenkov Telescope Array (CTA).
|
[{'version': 'v1', 'created': 'Wed, 25 Aug 2021 17:59:48 GMT'}]
|
2021-12-15
|
[array(['Acciari', 'V. A.', '', '17 now at 21'], dtype=object)
array(['Ansoldi', 'S.', '', '17 now at 21'], dtype=object)
array(['Antonelli', 'L. A.', '', '17 now at 21'], dtype=object)
array(['Engels', 'A. Arbet', '', '17 now at 21'], dtype=object)
array(['Artero', 'M.', '', '17 now at 21'], dtype=object)
array(['Asano', 'K.', '', '17 now at 21'], dtype=object)
array(['Baack', 'D.', '', '17 now at 21'], dtype=object)
array(['Babić', 'A.', '', '17 now at 21'], dtype=object)
array(['Baquero', 'A.', '', '17 now at 21'], dtype=object)
array(['de Almeida', 'U. Barres', '', '17 now at 21'], dtype=object)
array(['Barrio', 'J. A.', '', '17 now at 21'], dtype=object)
array(['Batković', 'I.', '', '17 now at 21'], dtype=object)
array(['González', 'J. Becerra', '', '17 now at 21'], dtype=object)
array(['Bednarek', 'W.', '', '17 now at 21'], dtype=object)
array(['Bellizzi', 'L.', '', '17 now at 21'], dtype=object)
array(['Bernardini', 'E.', '', '17 now at 21'], dtype=object)
array(['Bernardos', 'M.', '', '17 now at 21'], dtype=object)
array(['Berti', 'A.', '', '17 now at 21'], dtype=object)
array(['Besenrieder', 'J.', '', '17 now at 21'], dtype=object)
array(['Bhattacharyya', 'W.', '', '17 now at 21'], dtype=object)
array(['Bigongiari', 'C.', '', '17 now at 21'], dtype=object)
array(['Biland', 'A.', '', '17 now at 21'], dtype=object)
array(['Blanch', 'O.', '', '17 now at 21'], dtype=object)
array(['Bonnoli', 'G.', '', '17 now at 21'], dtype=object)
array(['Bošnjak', 'Ž.', '', '17 now at 21'], dtype=object)
array(['Busetto', 'G.', '', '17 now at 21'], dtype=object)
array(['Carosi', 'R.', '', '17 now at 21'], dtype=object)
array(['Ceribella', 'G.', '', '17 now at 21'], dtype=object)
array(['Cerruti', 'M.', '', '17 now at 21'], dtype=object)
array(['Chai', 'Y.', '', '17 now at 21'], dtype=object)
array(['Chilingarian', 'A.', '', '17 now at 21'], dtype=object)
array(['Cikota', 'S.', '', '17 now at 21'], dtype=object)
array(['Colak', 'S. M.', '', '17 now at 21'], dtype=object)
array(['Colombo', 'E.', '', '17 now at 21'], dtype=object)
array(['Contreras', 'J. L.', '', '17 now at 21'], dtype=object)
array(['Cortina', 'J.', '', '17 now at 21'], dtype=object)
array(['Covino', 'S.', '', '17 now at 21'], dtype=object)
array(["D'Amico", 'G.', '', '17 now at 21'], dtype=object)
array(["D'Elia", 'V.', '', '17 now at 21'], dtype=object)
array(['Da Vela', 'P.', '', '17 now at 21'], dtype=object)
array(['Dazzi', 'F.', '', '5 and 22'], dtype=object)
array(['De Angelis', 'A.', '', '5 and 22'], dtype=object)
array(['De Lotto', 'B.', '', '5 and 22'], dtype=object)
array(['Delfino', 'M.', '', '5 and 22'], dtype=object)
array(['Delgado', 'J.', '', '5 and 22'], dtype=object)
array(['Mendez', 'C. Delgado', '', '26 now at\n 27'], dtype=object)
array(['Depaoli', 'D.', '', '26 now at\n 27'], dtype=object)
array(['Di Pierro', 'F.', '', '26 now at\n 27'], dtype=object)
array(['Di Venere', 'L.', '', '26 now at\n 27'], dtype=object)
array(['Espiñeira', 'E. Do Souto', '', '26 now at\n 27'], dtype=object)
array(['Prester', 'D. Dominis', '', '26 now at\n 27'], dtype=object)
array(['Donini', 'A.', '', '26 now at\n 27'], dtype=object)
array(['Dorner', 'D.', '', '26 now at\n 27'], dtype=object)
array(['Doro', 'M.', '', '26 now at\n 27'], dtype=object)
array(['Elsaesser', 'D.', '', '26 now at\n 27'], dtype=object)
array(['Ramazani', 'V. Fallah', '', '26 now at\n 27'], dtype=object)
array(['Fattorini', 'A.', '', '7 and 16'], dtype=object)
array(['Ferrara', 'G.', '', '7 and 16'], dtype=object)
array(['Fonseca', 'M. V.', '', '7 and 16'], dtype=object)
array(['Font', 'L.', '', '7 and 16'], dtype=object)
array(['Fruck', 'C.', '', '7 and 16'], dtype=object)
array(['Fukami', 'S.', '', '7 and 16'], dtype=object)
array(['López', 'R. J. García', '', '7 and 16'], dtype=object)
array(['Garczarczyk', 'M.', '', '7 and 16'], dtype=object)
array(['Gasparyan', 'S.', '', '7 and 16'], dtype=object)
array(['Gaug', 'M.', '', '7 and 16'], dtype=object)
array(['Giglietto', 'N.', '', '7 and 16'], dtype=object)
array(['Giordano', 'F.', '', '7 and 16'], dtype=object)
array(['Gliwny', 'P.', '', '7 and 16'], dtype=object)
array(['Godinović', 'N.', '', '7 and 16'], dtype=object)
array(['Green', 'J. G.', '', '7 and 16'], dtype=object)
array(['Green', 'D.', '', '7 and 16'], dtype=object)
array(['Hadasch', 'D.', '', '7 and 16'], dtype=object)
array(['Hahn', 'A.', '', '7 and 16'], dtype=object)
array(['Heckmann', 'L.', '', '7 and 16'], dtype=object)
array(['Herrera', 'J.', '', '7 and 16'], dtype=object)
array(['Hoang', 'J.', '', '7 and 16'], dtype=object)
array(['Hrupec', 'D.', '', '7 and 16'], dtype=object)
array(['Hütten', 'M.', '', '7 and 16'], dtype=object)
array(['Inada', 'T.', '', '7 and 16'], dtype=object)
array(['Inoue', 'S.', '', '7 and 16'], dtype=object)
array(['Ishio', 'K.', '', '7 and 16'], dtype=object)
array(['Iwamura', 'Y.', '', '7 and 16'], dtype=object)
array(['Jiménez', 'I.', '', '7 and 16'], dtype=object)
array(['Jormanainen', 'J.', '', '7 and 16'], dtype=object)
array(['Jouvin', 'L.', '', '7 and 16'], dtype=object)
array(['Kajiwara', 'Y.', '', '7 and 16'], dtype=object)
array(['Karjalainen', 'M.', '', '7 and 16'], dtype=object)
array(['Kerszberg', 'D.', '', '7 and 16'], dtype=object)
array(['Kobayashi', 'Y.', '', '7 and 16'], dtype=object)
array(['Kubo', 'H.', '', '7 and 16'], dtype=object)
array(['Kushida', 'J.', '', '7 and 16'], dtype=object)
array(['Lamastra', 'A.', '', '7 and 16'], dtype=object)
array(['Lelas', 'D.', '', '7 and 16'], dtype=object)
array(['Leone', 'F.', '', '7 and 16'], dtype=object)
array(['Lindfors', 'E.', '', '7 and 16'], dtype=object)
array(['Lombardi', 'S.', '', '7 and 16'], dtype=object)
array(['Longo', 'F.', '', '7 and 16'], dtype=object)
array(['López-Coto', 'R.', '', '7 and 16'], dtype=object)
array(['López-Moya', 'M.', '', '7 and 16'], dtype=object)
array(['López-Oramas', 'A.', '', '7 and 16'], dtype=object)
array(['Loporchio', 'S.', '', '7 and 16'], dtype=object)
array(['Fraga', 'B. Machado de Oliveira', '', '7 and 16'], dtype=object)
array(['Maggio', 'C.', '', '7 and 16'], dtype=object)
array(['Majumdar', 'P.', '', '7 and 16'], dtype=object)
array(['Makariev', 'M.', '', '7 and 16'], dtype=object)
array(['Mallamaci', 'M.', '', '7 and 16'], dtype=object)
array(['Maneva', 'G.', '', '7 and 16'], dtype=object)
array(['Manganaro', 'M.', '', '7 and 16'], dtype=object)
array(['Mannheim', 'K.', '', '7 and 16'], dtype=object)
array(['Maraschi', 'L.', '', '7 and 16'], dtype=object)
array(['Mariotti', 'M.', '', '7 and 16'], dtype=object)
array(['Martínez', 'M.', '', '7 and 16'], dtype=object)
array(['Mazin', 'D.', '', '7 and 16'], dtype=object)
array(['Menchiari', 'S.', '', '2 and 38'], dtype=object)
array(['Mender', 'S.', '', '2 and 38'], dtype=object)
array(['Mićanović', 'S.', '', '2 and 38'], dtype=object)
array(['Miceli', 'D.', '', '2 and 38'], dtype=object)
array(['Miener', 'T.', '', '2 and 38'], dtype=object)
array(['Minev', 'M.', '', '2 and 38'], dtype=object)
array(['Miranda', 'J. M.', '', '2 and 38'], dtype=object)
array(['Mirzoyan', 'R.', '', '2 and 38'], dtype=object)
array(['Molina', 'E.', '', '2 and 38'], dtype=object)
array(['Moralejo', 'A.', '', '2 and 38'], dtype=object)
array(['Morcuende', 'D.', '', '2 and 38'], dtype=object)
array(['Moreno', 'V.', '', '2 and 38'], dtype=object)
array(['Moretti', 'E.', '', '2 and 38'], dtype=object)
array(['Neustroev', 'V.', '', '2 and 38'], dtype=object)
array(['Nigro', 'C.', '', '2 and 38'], dtype=object)
array(['Nilsson', 'K.', '', '2 and 38'], dtype=object)
array(['Nishijima', 'K.', '', '2 and 38'], dtype=object)
array(['Noda', 'K.', '', '2 and 38'], dtype=object)
array(['Nozaki', 'S.', '', '2 and 38'], dtype=object)
array(['Ohtani', 'Y.', '', '2 and 38'], dtype=object)
array(['Oka', 'T.', '', '2 and 38'], dtype=object)
array(['Santos', 'J. Otero', '', '2 and 38'], dtype=object)
array(['Paiano', 'S.', '', '2 and 38'], dtype=object)
array(['Palatiello', 'M.', '', '2 and 38'], dtype=object)
array(['Paneque', 'D.', '', '2 and 38'], dtype=object)
array(['Paoletti', 'R.', '', '2 and 38'], dtype=object)
array(['Paredes', 'J. M.', '', '2 and 38'], dtype=object)
array(['Pavletić', 'L.', '', '2 and 38'], dtype=object)
array(['Peñil', 'P.', '', '2 and 38'], dtype=object)
array(['Perennes', 'C.', '', '2 and 38'], dtype=object)
array(['Persic', 'M.', '', '2 and 38'], dtype=object)
array(['Moroni', 'P. G. Prada', '', '42 and 43'], dtype=object)
array(['Prandini', 'E.', '', '42 and 43'], dtype=object)
array(['Priyadarshi', 'C.', '', '42 and 43'], dtype=object)
array(['Puljak', 'I.', '', '42 and 43'], dtype=object)
array(['Rhode', 'W.', '', '42 and 43'], dtype=object)
array(['Ribó', 'M.', '', '42 and 43'], dtype=object)
array(['Rico', 'J.', '', '42 and 43'], dtype=object)
array(['Righi', 'C.', '', '42 and 43'], dtype=object)
array(['Rugliancich', 'A.', '', '42 and 43'], dtype=object)
array(['Saha', 'L.', '', '42 and 43'], dtype=object)
array(['Sahakyan', 'N.', '', '42 and 43'], dtype=object)
array(['Saito', 'T.', '', '42 and 43'], dtype=object)
array(['Sakurai', 'S.', '', '42 and 43'], dtype=object)
array(['Satalecka', 'K.', '', '42 and 43'], dtype=object)
array(['Saturni', 'F. G.', '', '42 and 43'], dtype=object)
array(['Schleicher', 'B.', '', '42 and 43'], dtype=object)
array(['Schmidt', 'K.', '', '42 and 43'], dtype=object)
array(['Schweizer', 'T.', '', '42 and 43'], dtype=object)
array(['Sitarek', 'J.', '', '42 and 43'], dtype=object)
array(['Šnidarić', 'I.', '', '42 and 43'], dtype=object)
array(['Sobczynska', 'D.', '', '42 and 43'], dtype=object)
array(['Spolon', 'A.', '', '42 and 43'], dtype=object)
array(['Stamerra', 'A.', '', '42 and 43'], dtype=object)
array(['Strom', 'D.', '', '42 and 43'], dtype=object)
array(['Strzys', 'M.', '', '42 and 43'], dtype=object)
array(['Suda', 'Y.', '', '42 and 43'], dtype=object)
array(['Surić', 'T.', '', '42 and 43'], dtype=object)
array(['Takahashi', 'M.', '', '42 and 43'], dtype=object)
array(['Tavecchio', 'F.', '', '42 and 43'], dtype=object)
array(['Temnikov', 'P.', '', '42 and 43'], dtype=object)
array(['Terzić', 'T.', '', '42 and 43'], dtype=object)
array(['Teshima', 'M.', '', '42 and 43'], dtype=object)
array(['Tosti', 'L.', '', '42 and 43'], dtype=object)
array(['Truzzi', 'S.', '', '42 and 43'], dtype=object)
array(['Tutone', 'A.', '', '42 and 43'], dtype=object)
array(['Ubach', 'S.', '', '42 and 43'], dtype=object)
array(['van Scherpenberg', 'J.', '', '42 and 43'], dtype=object)
array(['Vanzo', 'G.', '', '42 and 43'], dtype=object)
array(['Acosta', 'M. Vazquez', '', '42 and 43'], dtype=object)
array(['Ventura', 'S.', '', '42 and 43'], dtype=object)
array(['Verguilov', 'V.', '', '42 and 43'], dtype=object)
array(['Vigorito', 'C. F.', '', '42 and 43'], dtype=object)
array(['Vitale', 'V.', '', '42 and 43'], dtype=object)
array(['Vovk', 'I.', '', '42 and 43'], dtype=object)
array(['Will', 'M.', '', '42 and 43'], dtype=object)
array(['Wunderlich', 'C.', '', '42 and 43'], dtype=object)
array(['Zarić', 'D.', '', '42 and 43'], dtype=object)
array(['Caraveo', 'P. A.', '', '42 and 43'], dtype=object)
array(['Cognard', 'I.', '', '42 and 43'], dtype=object)
array(['Guillemot', 'L.', '', '42 and 43'], dtype=object)
array(['Harding', 'A. K.', '', '45 and 46'], dtype=object)
array(['Li', 'J.', '', '45 and 46'], dtype=object)
array(['Limyansky', 'B.', '', '48 and 49'], dtype=object)
array(['Ng', 'C. Y.', '', '48 and 49'], dtype=object)
array(['Torres', 'D. F.', '', '50, 51, and 52'], dtype=object)
array(['Parkinson', 'P. M. Saz', '', '47,48, and 49'], dtype=object)]
|
4,546 |
2006.10598
|
Bryan Plummer
|
Bryan A. Plummer, Nikoli Dryden, Julius Frost, Torsten Hoefler, Kate
Saenko
|
Neural Parameter Allocation Search
|
Accepted at ICLR 2022
| null | null | null |
cs.LG cs.CL cs.CV stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Training neural networks requires increasing amounts of memory. Parameter
sharing can reduce memory and communication costs, but existing methods assume
networks have many identical layers and utilize hand-crafted sharing strategies
that fail to generalize. We introduce Neural Parameter Allocation Search
(NPAS), a novel task where the goal is to train a neural network given an
arbitrary, fixed parameter budget. NPAS covers both low-budget regimes, which
produce compact networks, as well as a novel high-budget regime, where
additional capacity can be added to boost performance without increasing
inference FLOPs. To address NPAS, we introduce Shapeshifter Networks (SSNs),
which automatically learn where and how to share parameters in a network to
support any parameter budget without requiring any changes to the architecture
or loss function. NPAS and SSNs provide a complete framework for addressing
generalized parameter sharing, and can also be combined with prior work for
additional performance gains. We demonstrate the effectiveness of our approach
using nine network architectures across four diverse tasks, including ImageNet
classification and transformers.
|
[{'version': 'v1', 'created': 'Thu, 18 Jun 2020 15:01:00 GMT'}
{'version': 'v2', 'created': 'Wed, 2 Dec 2020 18:43:30 GMT'}
{'version': 'v3', 'created': 'Tue, 13 Apr 2021 14:08:20 GMT'}
{'version': 'v4', 'created': 'Wed, 16 Mar 2022 03:29:34 GMT'}]
|
2022-03-17
|
[array(['Plummer', 'Bryan A.', ''], dtype=object)
array(['Dryden', 'Nikoli', ''], dtype=object)
array(['Frost', 'Julius', ''], dtype=object)
array(['Hoefler', 'Torsten', ''], dtype=object)
array(['Saenko', 'Kate', ''], dtype=object)]
|
4,547 |
1810.09476
|
Clare Saunders
|
C. Saunders, G. Aldering, P. Antilogus, S. Bailey, C. Baltay, K.
Barbary, D. Baugh, K. Boone, S. Bongard, C. Buton, J. Chen, N. Chotard, Y.
Copin, S. Dixon, P. Fagrelius, H. K. Fakhouri, U. Feindt, D. Fouchez, E.
Gangler, B. Hayden, P.-F. L\'eget, W. Hillebrandt, A. G. Kim, M. Kowalski, D.
K\"usters, S. Lombardo, J. Nordin, R. Pain, E. Pecontal, R. Pereira, D.
Rabinowitz, M. Rigault, D. Rubin, K. Runge, G. Smadja, S. Perlmutter, C.
Sofiatti, N. Suzuki, C. Tao, S. Taubenberger, R. C. Thomas, M. Vincenzi
|
SNEMO: Improved Empirical Models for Type Ia Supernovae
|
51 page, 19 figures, accepted in ApJ
| null |
10.3847/1538-4357/aaec7e
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Type Ia supernova cosmology depends on the ability to fit and standardize
observations of supernova magnitudes with an empirical model. We present here a
series of new models of Type Ia Supernova spectral time series that capture a
greater amount of supernova diversity than possible with the models that are
currently customary. These are entitled SuperNova Empirical MOdels
(\textsc{SNEMO}\footnote{https://snfactory.lbl.gov/snemo}). The models are
constructed using spectrophotometric time series from $172$ individual
supernovae from the Nearby Supernova Factory, comprising more than $2000$
spectra. Using the available observations, Gaussian Processes are used to
predict a full spectral time series for each supernova. A matrix is constructed
from the spectral time series of all the supernovae, and Expectation
Maximization Factor Analysis is used to calculate the principal components of
the data. K-fold cross-validation then determines the selection of model
parameters and accounts for color variation in the data. Based on this process,
the final models are trained on supernovae that have been dereddened using the
Fitzpatrick and Massa extinction relation. Three final models are presented
here: \textsc{SNEMO2}, a two-component model for comparison with current
Type~Ia models; \textsc{SNEMO7}, a seven component model chosen for
standardizing supernova magnitudes which results in a total dispersion of
$0.100$~mag for a validation set of supernovae, of which $0.087$~mag is
unexplained (a total dispersion of $0.113$~mag with unexplained dispersion of
$0.097$~mag is found for the total set of training and validation supernovae);
and \textsc{SNEMO15}, a comprehensive $15$ component model that maximizes the
amount of spectral time series behavior captured.
|
[{'version': 'v1', 'created': 'Mon, 22 Oct 2018 18:02:44 GMT'}]
|
2018-12-26
|
[array(['Saunders', 'C.', ''], dtype=object)
array(['Aldering', 'G.', ''], dtype=object)
array(['Antilogus', 'P.', ''], dtype=object)
array(['Bailey', 'S.', ''], dtype=object)
array(['Baltay', 'C.', ''], dtype=object)
array(['Barbary', 'K.', ''], dtype=object)
array(['Baugh', 'D.', ''], dtype=object)
array(['Boone', 'K.', ''], dtype=object)
array(['Bongard', 'S.', ''], dtype=object)
array(['Buton', 'C.', ''], dtype=object)
array(['Chen', 'J.', ''], dtype=object)
array(['Chotard', 'N.', ''], dtype=object)
array(['Copin', 'Y.', ''], dtype=object)
array(['Dixon', 'S.', ''], dtype=object)
array(['Fagrelius', 'P.', ''], dtype=object)
array(['Fakhouri', 'H. K.', ''], dtype=object)
array(['Feindt', 'U.', ''], dtype=object)
array(['Fouchez', 'D.', ''], dtype=object)
array(['Gangler', 'E.', ''], dtype=object)
array(['Hayden', 'B.', ''], dtype=object)
array(['Léget', 'P. -F.', ''], dtype=object)
array(['Hillebrandt', 'W.', ''], dtype=object)
array(['Kim', 'A. G.', ''], dtype=object)
array(['Kowalski', 'M.', ''], dtype=object)
array(['Küsters', 'D.', ''], dtype=object)
array(['Lombardo', 'S.', ''], dtype=object)
array(['Nordin', 'J.', ''], dtype=object)
array(['Pain', 'R.', ''], dtype=object)
array(['Pecontal', 'E.', ''], dtype=object)
array(['Pereira', 'R.', ''], dtype=object)
array(['Rabinowitz', 'D.', ''], dtype=object)
array(['Rigault', 'M.', ''], dtype=object)
array(['Rubin', 'D.', ''], dtype=object)
array(['Runge', 'K.', ''], dtype=object)
array(['Smadja', 'G.', ''], dtype=object)
array(['Perlmutter', 'S.', ''], dtype=object)
array(['Sofiatti', 'C.', ''], dtype=object)
array(['Suzuki', 'N.', ''], dtype=object)
array(['Tao', 'C.', ''], dtype=object)
array(['Taubenberger', 'S.', ''], dtype=object)
array(['Thomas', 'R. C.', ''], dtype=object)
array(['Vincenzi', 'M.', ''], dtype=object)]
|
4,548 |
1810.08291
|
Prineha Narang
|
Will Finigan and Michael Cubeddu and Thomas Lively and Johannes Flick
and Prineha Narang
|
Qubit Allocation for Noisy Intermediate-Scale Quantum Computers
|
6 pages, 3 figures
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the era of noisy-intermediate-scale quantum computers, we expect to see
quantum devices with increasing numbers of qubits emerge in the foreseeable
future. To practically run quantum programs, logical qubits have to be mapped
to the physical qubits by a qubit allocation algorithm. However, on present day
devices, qubits differ by their error rate and connectivity. Here, we establish
and demonstrate on current experimental devices a new allocation algorithm that
combines the simulated annealing method with local search of the solution space
using Dijkstra's algorithm. Our algorithm takes into account the weighted
connectivity constraints of both the quantum hardware and the quantum program
being compiled. New quantum programs will enable unprecedented developments in
physics, chemistry, and materials science and our work offers an important new
pathway toward optimizing compilers for quantum programs.
|
[{'version': 'v1', 'created': 'Thu, 18 Oct 2018 22:21:01 GMT'}]
|
2018-10-22
|
[array(['Finigan', 'Will', ''], dtype=object)
array(['Cubeddu', 'Michael', ''], dtype=object)
array(['Lively', 'Thomas', ''], dtype=object)
array(['Flick', 'Johannes', ''], dtype=object)
array(['Narang', 'Prineha', ''], dtype=object)]
|
4,549 |
1304.2694
|
Mathias Niepert
|
Mathias Niepert
|
Symmetry-Aware Marginal Density Estimation
|
To appear in proceedings of AAAI 2013
| null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Rao-Blackwell theorem is utilized to analyze and improve the scalability
of inference in large probabilistic models that exhibit symmetries. A novel
marginal density estimator is introduced and shown both analytically and
empirically to outperform standard estimators by several orders of magnitude.
The developed theory and algorithms apply to a broad class of probabilistic
models including statistical relational models considered not susceptible to
lifted probabilistic inference.
|
[{'version': 'v1', 'created': 'Tue, 9 Apr 2013 18:47:47 GMT'}]
|
2013-04-10
|
[array(['Niepert', 'Mathias', ''], dtype=object)]
|
4,550 |
1202.3482
|
Ramon Van Handel
|
Elisabeth Gassiat (LM-Orsay), Ramon Van Handel
|
The local geometry of finite mixtures
|
25 pages
|
Trans. Amer. Math. Soc. 366, 1047-1072 (2014)
|
10.1090/S0002-9947-2013-06041-2
| null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We establish that for q>=1, the class of convex combinations of q translates
of a smooth probability density has local doubling dimension proportional to q.
The key difficulty in the proof is to control the local geometric structure of
mixture classes. Our local geometry theorem yields a bound on the (bracketing)
metric entropy of a class of normalized densities, from which a local entropy
bound is deduced by a general slicing procedure.
|
[{'version': 'v1', 'created': 'Thu, 16 Feb 2012 00:59:11 GMT'}
{'version': 'v2', 'created': 'Wed, 1 Aug 2012 16:06:38 GMT'}]
|
2015-02-04
|
[array(['Gassiat', 'Elisabeth', '', 'LM-Orsay'], dtype=object)
array(['Van Handel', 'Ramon', ''], dtype=object)]
|
4,551 |
2301.03842
|
Adriana Postiglione
|
Adriana Postiglione (on behalf of Ilaria De Angelis, Massimiliano Di
Blasi)
|
AstroGarden of Roma Tre University: from presence to online tour
|
preprint
|
IL NUOVO CIMENTO 45 C (2022) 91
|
10.1393/ncc/i2022-22091-x
| null |
physics.ed-ph
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The transition of teaching activities to online mode, forced by the Covid-19
emergency, had also positive aspects, as it pushed to create new contents and
use new approaches. An example is represented by our experience at the
Department of Mathematics and Physics ofRoma Tre University, where we had to
revolutionise an activity we carried on countless times over the years: the
guided visit to our astronomical garden, the AstroGarden. In this paper, we
analyse the new approach we used especially regarding the activities with the
so-called oriented globe, the different audiences we reached and the positive
feedback we received.
|
[{'version': 'v1', 'created': 'Tue, 10 Jan 2023 08:20:22 GMT'}]
|
2023-01-11
|
[array(['Postiglione', 'Adriana', '',
'on behalf of Ilaria De Angelis, Massimiliano Di\n Blasi'],
dtype=object) ]
|
4,552 |
2003.08170
|
Teemu Lehto
|
Teemu Lehto and Markku Hinkka
|
Discovering Business Area Effects to Process Mining Analysis Using
Clustering and Influence Analysis
|
12 pages. Paper accepted in 23rd International Conference on Business
Information Systems (BIS 2020) to be published in a proceedings edition of
the Lecture Notes in Business Information Processing
|
Abramowicz W., Klein G. (eds) Business Information Systems. BIS
2020. Lecture Notes in Business Information Processing, vol 389. Springer,
Cham
|
10.1007/978-3-030-53337-3_18
|
LNBIP, volume 389
|
cs.DB cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A common challenge for improving business processes in large organizations is
that business people in charge of the operations are lacking a fact-based
understanding of the execution details, process variants, and exceptions taking
place in business operations. While existing process mining methodologies can
discover these details based on event logs, it is challenging to communicate
the process mining findings to business people. In this paper, we present a
novel methodology for discovering business areas that have a significant effect
on the process execution details. Our method uses clustering to group similar
cases based on process flow characteristics and then influence analysis for
detecting those business areas that correlate most with the discovered
clusters. Our analysis serves as a bridge between BPM people and business,
people facilitating the knowledge sharing between these groups. We also present
an example analysis based on publicly available real-life purchase order
process data.
|
[{'version': 'v1', 'created': 'Wed, 18 Mar 2020 11:58:01 GMT'}]
|
2021-08-26
|
[array(['Lehto', 'Teemu', ''], dtype=object)
array(['Hinkka', 'Markku', ''], dtype=object)]
|
4,553 |
1902.10627
|
Yucai Su
|
Yucai Su, R.B. Zhang
|
Mixed cohomology of Lie superalgebras
|
21 pages
| null | null | null |
math.RT math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate a new cohomology of Lie superalgebras, which may be compared
to a de Rham cohomology of Lie supergroups involving both differential and
integral forms. It is defined by a BRST complex of Lie superalgebra modules,
which is formulated in terms of a Weyl superalgebra and incorporates
inequivalent representations of the bosonic Weyl subalgebra. The new cohomology
includes the standard Lie superalgebra cohomology as a special case. Examples
of new cohomology groups are computed.
|
[{'version': 'v1', 'created': 'Tue, 26 Feb 2019 08:51:00 GMT'}]
|
2019-02-28
|
[array(['Su', 'Yucai', ''], dtype=object)
array(['Zhang', 'R. B.', ''], dtype=object)]
|
4,554 |
nucl-ex/0412038
|
Roberta Ghetti
|
R. Ghetti, J. Helgesson, G. Lanzano', E. De Filippo, M. Geraci, S.
Aiello, S. Cavallaro, A. Pagano, G. Politi, J. L. Charvet, R. Dayras, E.
Pollacco, C. Volant, C. Beck, D. Mahboub, R. Nouicer
|
Correlation functions and emission time sequence of light charged
particles from projectile-like fragment source in E/A = 44 and 77 MeV 40Ar +
27Al collisions
|
18 pages, 5 figures, submitted to Nuclear Physics A
| null |
10.1016/j.nuclphysa.2005.11.019
| null |
nucl-ex
| null |
Two-particle correlation functions, involving protons, deuterons, tritons,
and alpha-particles, have been measured at very forward angles (0.7 deg <
theta_lab < 7 deg), in order to study projectile-like fragment (PLF) emission
in E/A = 44 and 77 MeV 40Ar + 27Al collisions. Peaks, originating from
resonance decays, are larger at E/A = 44 than at 77 MeV. This reflects the
larger relative importance of independently emitted light particles, as
compared to two-particle decay from unstable fragments, at the higher beam
energy. The time sequence of the light charged particles, emitted from the PLF,
has been deduced from particle-velocity-gated correlation functions (discarding
the contribution from resonance decays). Alpha-particles are found to have an
average emission time shorter than protons but longer than tritons and
deuterons.
|
[{'version': 'v1', 'created': 'Fri, 17 Dec 2004 14:11:02 GMT'}]
|
2010-04-05
|
[array(['Ghetti', 'R.', ''], dtype=object)
array(['Helgesson', 'J.', ''], dtype=object)
array(["Lanzano'", 'G.', ''], dtype=object)
array(['De Filippo', 'E.', ''], dtype=object)
array(['Geraci', 'M.', ''], dtype=object)
array(['Aiello', 'S.', ''], dtype=object)
array(['Cavallaro', 'S.', ''], dtype=object)
array(['Pagano', 'A.', ''], dtype=object)
array(['Politi', 'G.', ''], dtype=object)
array(['Charvet', 'J. L.', ''], dtype=object)
array(['Dayras', 'R.', ''], dtype=object)
array(['Pollacco', 'E.', ''], dtype=object)
array(['Volant', 'C.', ''], dtype=object)
array(['Beck', 'C.', ''], dtype=object)
array(['Mahboub', 'D.', ''], dtype=object)
array(['Nouicer', 'R.', ''], dtype=object)]
|
4,555 |
2004.07199
|
Matthew Argall
|
Matthew R. Argall, Colin Small, Samantha Piatt, Liam Breen, Marek
Petrik, Kim Kokkonen, Julie Barnum, Kristopher Larsen, Frederick D. Wilder,
Mitsuo Oka, William R. Paterson, Roy B. Torbert, Robert E. Ergun, Tai Phan,
Barbara L. Giles, James L. Burch
|
MMS SITL Ground Loop: Automating the burst data selection process
|
21 pages, 8 figures, 3 tables, submitted to Frontiers: Space Science
| null | null | null |
physics.space-ph astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Global-scale energy flow throughout Earth's magnetosphere (MSP) is catalyzed
by processes that occur at Earth's magnetopause (MP). Magnetic reconnection is
one process responsible for solar wind entry into and global convection within
the MSP, and the MP location, orientation, and motion have an impact on the
dynamics. Statistical studies that focus on these and other MP phenomena and
characteristics inherently require MP identification in their event search
criteria, a task that can be automated using machine learning. We introduce a
Long-Short Term Memory (LSTM) Recurrent Neural Network model to detect MP
crossings and assist studies of energy transfer into the MSP. As its first
application, the LSTM has been implemented into the operational data stream of
the Magnetospheric Multiscale (MMS) mission. MMS focuses on the electron
diffusion region of reconnection, where electron dynamics break magnetic field
lines and plasma is energized. MMS employs automated burst triggers onboard the
spacecraft and a Scientist-in-the-Loop (SITL) on the ground to select intervals
likely to contain diffusion regions. Only low-resolution data is available to
the SITL, which is insufficient to resolve electron dynamics. A strategy for
the SITL, then, is to select all MP crossings. Of all 219 SITL selections
classified as MP crossings during the first five months of model operations,
the model predicted 166 (76%) of them, and of all 360 model predictions, 257
(71%) were selected by the SITL. Most predictions that were not classified as
MP crossings by the SITL were still MP-like; the intervals contained mixed
magnetosheath and magnetospheric plasmas. The LSTM model and its predictions
are public to ease the burden of arduous event searches involving the MP,
including those for EDRs. For MMS, this helps free up mission operation costs
by consolidating manual classification processes into automated routines.
|
[{'version': 'v1', 'created': 'Wed, 15 Apr 2020 16:58:13 GMT'}
{'version': 'v2', 'created': 'Mon, 20 Jul 2020 19:03:54 GMT'}]
|
2020-07-22
|
[array(['Argall', 'Matthew R.', ''], dtype=object)
array(['Small', 'Colin', ''], dtype=object)
array(['Piatt', 'Samantha', ''], dtype=object)
array(['Breen', 'Liam', ''], dtype=object)
array(['Petrik', 'Marek', ''], dtype=object)
array(['Kokkonen', 'Kim', ''], dtype=object)
array(['Barnum', 'Julie', ''], dtype=object)
array(['Larsen', 'Kristopher', ''], dtype=object)
array(['Wilder', 'Frederick D.', ''], dtype=object)
array(['Oka', 'Mitsuo', ''], dtype=object)
array(['Paterson', 'William R.', ''], dtype=object)
array(['Torbert', 'Roy B.', ''], dtype=object)
array(['Ergun', 'Robert E.', ''], dtype=object)
array(['Phan', 'Tai', ''], dtype=object)
array(['Giles', 'Barbara L.', ''], dtype=object)
array(['Burch', 'James L.', ''], dtype=object)]
|
4,556 |
chao-dyn/9608012
|
Predrag Cvitanovic
|
Predrag Cvitanovic, Gabor Vattay and Andreas Wirzba
|
Quantum Fluids and Classical Determinants
|
33 pages, LaTeX with lamuphys.sty, epsf.sty, epsfig.sty macros,
available at http://www.nbi.dk/~predrag/
|
Classical, Semiclassical and Quantum Dynamics in Atoms, Lecture
Notes in Physics vol. 485, H. Friedrich and B. Eckhardt, eds, (Springer,
Heidelberg, 1997) pp 29-62
|
10.1007/BFb0105968
| null |
chao-dyn nlin.CD
| null |
A "quasiclassical" approximation to the quantum spectrum of the Schroedinger
equation is obtained from the trace of a quasiclassical evolution operator for
the "hydrodynamical" version of the theory, in which the dynamical evolution
takes place in the extended phase space $[q(t),p(t),M(t)] = [q_i, \partial_i S,
\partial_i \partial_j S ]$. The quasiclassical evolution operator is
multiplicative along the classical flow, the corresponding quasiclassical zeta
function is entire for nice hyperbolic flows, and its eigenvalue spectrum
contains the spectrum of the semiclassical zeta function. The advantage of the
quasiclassical zeta function is that it has a larger analyticity domain than
the original semiclassical zeta function; the disadvantage is that it contains
eigenvalues extraneous to the quantum problem. Numerical investigations
indicate that the presence of these extraneous eigenvalues renders the original
Gutzwiller-Voros semiclassical zeta function preferable in practice to the
quasiclassical zeta function presented here. The cumulant expansion of the
exact quantum mechanical scattering kernel and the cycle expansion of the
corresponding semiclassical zeta function part ways at a threshold given by the
topological entropy; beyond this threshold quantum mechanics cannot resolve
fine details of the classical chaotic dynamics.
|
[{'version': 'v1', 'created': 'Thu, 15 Aug 1996 13:31:02 GMT'}]
|
2009-10-28
|
[array(['Cvitanovic', 'Predrag', ''], dtype=object)
array(['Vattay', 'Gabor', ''], dtype=object)
array(['Wirzba', 'Andreas', ''], dtype=object)]
|
4,557 |
1608.06318
|
Thomas Vidick
|
Gil Cohen, Thomas Vidick
|
Privacy Amplification Against Active Quantum Adversaries
|
The result is invalidated due to a mistake, pointed out by an
anonymous referee, in the use of the Markov condition at the beginning of the
proof of Theorem 31
| null | null | null |
quant-ph cs.CC cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Privacy amplification is the task by which two cooperating parties transform
a shared weak secret, about which an eavesdropper may have side information,
into a uniformly random string uncorrelated from the eavesdropper. Privacy
amplification against passive adversaries, where it is assumed that the
communication is over a public but authenticated channel, can be achieved in
the presence of classical as well as quantum side information by a
single-message protocol based on strong extractors.
In 2009 Dodis and Wichs devised a two-message protocol to achieve privacy
amplification against active adversaries, where the public communication
channel is no longer assumed to be authenticated, through the use of a
strengthening of strong extractors called non-malleable extractors which they
introduced. Dodis and Wichs only analyzed the case of classical side
information.
We consider the task of privacy amplification against active adversaries with
quantum side information. Our main result is showing that the Dodis-Wichs
protocol remains secure in this scenario provided its main building block, the
non-malleable extractor, satisfies a notion of quantum-proof non-malleability
which we introduce. We show that an adaptation of a recent construction of
non-malleable extractors due to Chattopadhyay et al. is quantum proof, thereby
providing the first protocol for privacy amplification that is secure against
active quantum adversaries. Our protocol is quantitatively comparable to the
near-optimal protocols known in the classical setting.
|
[{'version': 'v1', 'created': 'Mon, 22 Aug 2016 21:33:30 GMT'}
{'version': 'v2', 'created': 'Sun, 3 Sep 2017 18:45:43 GMT'}]
|
2017-09-05
|
[array(['Cohen', 'Gil', ''], dtype=object)
array(['Vidick', 'Thomas', ''], dtype=object)]
|
4,558 |
2103.17163
|
Caroline Costa
|
C. S. R. Costa, Adam Freese, Ian C. Clo\"et, Bruno El-Bennich,
Gast\~ao Krein, and Peter C. Tandy
|
Intrinsic Glue and Wilson lines within Dressed Quarks
|
12 pages
|
Phys. Rev. C 104, 045201 (2021)
|
10.1103/PhysRevC.104.045201
| null |
hep-ph nucl-th
|
http://creativecommons.org/licenses/by/4.0/
|
We construct a quark target model (QTM) to incorporate intrinsic glue into
effective low-energy models of QCD, which often contain only quark degrees of
freedom. This method guarantees the gauge invariance of observables
order-by-order in the strong coupling. The quark and gluon PDFs for the dressed
quarks are obtained in the QTM at leading order. We demonstrate gauge
invariance of the results by comparing both covariant and light cone gauges,
with the former including an explicit Wilson line contribution. A key finding
is that in covariant gauges the Wilson line can carry a significant amount of
the light cone momentum. With coupling strength $\alpha_s = 0.5$ and dressed
quark mass $M_q = 0.4\,$GeV, we find quark and gluon momentum fractions of
$\left<x\right>_q = 0.81$ and $\left<x\right>_g = 0.19$, where the Wilson line
contribution to the quark momentum fraction is $-0.18$. We use the on-shell
renormalization scheme and find that at one-loop this Wilson line contribution
does not depend on the covariant gauge but does vanish in light cone gauge as
expected. This result demonstrates that it is crucial to account for Wilson
line contributions when calculating quantum correlation functions in covariant
gauges. We also consider the impact of a gluon mass using the gauge invariant
formalism proposed by Cornwall, and combine these QTM results with two
quark-level models to obtain quark and gluon PDFs for the pion.
|
[{'version': 'v1', 'created': 'Wed, 31 Mar 2021 15:26:39 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Oct 2021 18:17:50 GMT'}]
|
2021-10-27
|
[array(['Costa', 'C. S. R.', ''], dtype=object)
array(['Freese', 'Adam', ''], dtype=object)
array(['Cloët', 'Ian C.', ''], dtype=object)
array(['El-Bennich', 'Bruno', ''], dtype=object)
array(['Krein', 'Gastão', ''], dtype=object)
array(['Tandy', 'Peter C.', ''], dtype=object)]
|
4,559 |
1507.03546
|
Zi-Wen Liu
|
Zi-Wen Liu, Christopher Perry, Yechao Zhu, Dax Enshan Koh, Scott
Aaronson
|
Doubly infinite separation of quantum information and communication
|
16 pages, 2 figures. v4: minor errors fixed; close to published
version; v5: financial support info added
|
Phys. Rev. A 93, 012347 (2016)
|
10.1103/PhysRevA.93.012347
|
MIT-CTP/4692
|
quant-ph cs.CC cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove the existence of (one-way) communication tasks with a subconstant
versus superconstant asymptotic gap, which we call "doubly infinite," between
their quantum information and communication complexities. We do so by studying
the exclusion game [C. Perry et al., Phys. Rev. Lett. 115, 030504 (2015)] for
which there exist instances where the quantum information complexity tends to
zero as the size of the input $n$ increases. By showing that the quantum
communication complexity of these games scales at least logarithmically in $n$,
we obtain our result. We further show that the established lower bounds and
gaps still hold even if we allow a small probability of error. However in this
case, the $n$-qubit quantum message of the zero-error strategy can be
compressed polynomially.
|
[{'version': 'v1', 'created': 'Mon, 13 Jul 2015 18:49:52 GMT'}
{'version': 'v2', 'created': 'Fri, 25 Sep 2015 23:41:52 GMT'}
{'version': 'v3', 'created': 'Tue, 24 Nov 2015 20:40:11 GMT'}
{'version': 'v4', 'created': 'Sat, 30 Jan 2016 22:12:29 GMT'}
{'version': 'v5', 'created': 'Thu, 5 May 2016 20:23:20 GMT'}]
|
2016-05-09
|
[array(['Liu', 'Zi-Wen', ''], dtype=object)
array(['Perry', 'Christopher', ''], dtype=object)
array(['Zhu', 'Yechao', ''], dtype=object)
array(['Koh', 'Dax Enshan', ''], dtype=object)
array(['Aaronson', 'Scott', ''], dtype=object)]
|
4,560 |
2004.13131
|
Ece Mutlu
|
Ece \c{C}i\u{g}dem Mutlu, Ivan Garibay
|
Effects of Assortativity on Consensus Formation with Heterogeneous
Agents
| null | null | null | null |
cs.SI physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Despite the widespread use of Barabasi's scale-free networks and Erdos-Renyi
networks of which degree correlation (assortativity) is neutral, numerous
studies demonstrated that online social networks tend to show assortative
mixing (positive degree correlation), while non-social networks show a
disassortative mixing (negative degree correlation). First, we analyzed the
variability in the assortativity coefficients of different groups of the same
platform by using three different subreddits in Reddit. Our data analysis
results showed that Reddit is disassortative, and assortativity coefficients of
the aforementioned subreddits are computed as -0.0384, -0.0588 and -0.1107,
respectively. Motivated by the variability in the results even in the same
platform, we decided to investigate the sensitivity of dynamics of consensus
formation to the assortativity of the network. We concluded that the system is
more likely to reach a consensus when the network is disassortatively mixed or
neutral; however, the likelihood of the consensus significantly decreases when
the network is assortatively mixed. Surprisingly, the time elapsed until all
nodes fix their opinions is slightly lower when the network is neutral compared
to either assortative or disassortative networks. These results are more
pronounced when the thresholds of agents are more heterogeneously distributed.
|
[{'version': 'v1', 'created': 'Mon, 27 Apr 2020 19:57:00 GMT'}]
|
2020-04-29
|
[array(['Mutlu', 'Ece Çiğdem', ''], dtype=object)
array(['Garibay', 'Ivan', ''], dtype=object)]
|
4,561 |
1209.4704
|
Wei Fang
|
Yize Lu, Fuxing Gu, Chao Meng, Huakang Yu, Yaoguang Ma, Wei Fang and
Limin Tong
|
Multicolour wavelength-tunable lasing from a single bandgap-graded alloy
nanoribbon
| null | null | null | null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Tunable lasing from 578 nm to 640 nm is observed from a single CdSSe
bandgap-graded alloy nanoribbon, by selecting the excited spot at room
temperature. Though reabsorption is a serious problem to achieve lasing at
short wavelength, multiple scatters on the nanoribbon form localized cavities,
and thus realize lasing at different wavelengths. By increasing the excitation
area, we also observe multicolour lasing from the same nanoribbon
simultaneously.
|
[{'version': 'v1', 'created': 'Fri, 21 Sep 2012 05:27:12 GMT'}]
|
2012-09-24
|
[array(['Lu', 'Yize', ''], dtype=object)
array(['Gu', 'Fuxing', ''], dtype=object)
array(['Meng', 'Chao', ''], dtype=object)
array(['Yu', 'Huakang', ''], dtype=object)
array(['Ma', 'Yaoguang', ''], dtype=object)
array(['Fang', 'Wei', ''], dtype=object)
array(['Tong', 'Limin', ''], dtype=object)]
|
4,562 |
1303.0432
|
Fayyaz Ahmad Mr.
|
Laila M Assas, Fayyaz Ahmad, Malik Zaka Ullah
|
A correction note on "Three-step iterative methods for nonlinear
equations" and generalization of method
|
Authors decided to withdraw from the paper because these correction
are well known and there is no need of this article to make things more
clear. (After a reviewing literature)
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the paper [Muhammad Aslam Noor, Khalida Inayat Noor, Three-step iterative
methods for nonlinear equations, Applied Mathematics and Computation, 183
(2006), pp. 322-327 ], Authors presented an algorithm (\textbf{Algorithm 2.3})
and stated a theorem (\textbf{Theorem 2.3}) to prove the cubic order of
convergence but the given proof does not show cubic order of convergence.
Actually, the mathematical derivation steps to develop the \textbf{Algorithm
2.3} are wrong. In this note, we present the correct mathematical developments
and finally provide computational order of convergence in the favor of our
claim and provide the generalization of the method.
|
[{'version': 'v1', 'created': 'Sat, 2 Mar 2013 22:22:38 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Mar 2013 22:57:29 GMT'}
{'version': 'v3', 'created': 'Tue, 9 Apr 2013 13:14:04 GMT'}]
|
2015-03-13
|
[array(['Assas', 'Laila M', ''], dtype=object)
array(['Ahmad', 'Fayyaz', ''], dtype=object)
array(['Ullah', 'Malik Zaka', ''], dtype=object)]
|
4,563 |
2109.06718
|
Leonid Petrov
|
Amol Aggarwal, Alexei Borodin, Leonid Petrov, Michael Wheeler
|
Free Fermion Six Vertex Model: Symmetric Functions and Random Domino
Tilings
|
121 pages, 21 figures. v2: Added references, corrected typos. To
appear in Selecta Math
| null | null | null |
math.PR math-ph math.CO math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Our work deals with symmetric rational functions and probabilistic models
based on the fully inhomogeneous six vertex (ice type) model satisfying the
free fermion condition. Two families of symmetric rational functions
$F_\lambda,G_\lambda$ are defined as certain partition functions of the six
vertex model, with variables corresponding to row rapidities, and the labeling
signatures $\lambda=(\lambda_1\ge \ldots\ge \lambda_N)\in \mathbb{Z}^N$
encoding boundary conditions. These symmetric functions generalize Schur
symmetric polynomials, as well as some of their variations, such as factorial
and supersymmetric Schur polynomials. Cauchy type summation identities for
$F_\lambda,G_\lambda$ and their skew counterparts follow from the Yang-Baxter
equation. Using algebraic Bethe Ansatz, we obtain a double alternant type
formula for $F_\lambda$ and a Sergeev-Pragacz type formula for $G_\lambda$.
In the spirit of the theory of Schur processes, we define probability
measures on sequences of signatures with probability weights proportional to
products of our symmetric functions. We show that these measures can be viewed
as determinantal point processes, and we express their correlation kernels in a
double contour integral form. We present two proofs: The first is a direct
computation of Eynard-Mehta type, and the second uses non-standard,
inhomogeneous versions of fermionic operators in a Fock space coming from the
algebraic Bethe Ansatz for the six vertex model.
We also interpret our determinantal processes as random domino tilings of a
half-strip with inhomogeneous domino weights. In the bulk, we show that the
lattice asymptotic behavior of such domino tilings is described by a new
determinantal point process on $\mathbb{Z}^{2}$, which can be viewed as an
doubly-inhomogeneous generalization of the extended discrete sine process.
|
[{'version': 'v1', 'created': 'Tue, 14 Sep 2021 14:33:13 GMT'}
{'version': 'v2', 'created': 'Fri, 27 Jan 2023 11:58:03 GMT'}]
|
2023-01-30
|
[array(['Aggarwal', 'Amol', ''], dtype=object)
array(['Borodin', 'Alexei', ''], dtype=object)
array(['Petrov', 'Leonid', ''], dtype=object)
array(['Wheeler', 'Michael', ''], dtype=object)]
|
4,564 |
1712.10247
|
Simon Larson
|
Simon Larson
|
Maximizing Riesz means of anisotropic harmonic oscillators
|
Accepted and final version. 24 pages
| null | null | null |
math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider problems related to the asymptotic minimization of eigenvalues of
anisotropic harmonic oscillators in the plane. In particular we study Riesz
means of the eigenvalues and the trace of the corresponding heat kernels. The
eigenvalue minimization problem can be reformulated as a lattice point problem
where one wishes to maximize the number of points of
$(\mathbb{N}-\tfrac12)\times(\mathbb{N}-\tfrac12)$ inside triangles with
vertices $(0, 0), (0, \lambda \sqrt{\beta})$ and $(\lambda/{\sqrt{\beta}}, 0)$
with respect to $\beta>0$, for fixed $\lambda\geq 0$. This lattice point
formulation of the problem naturally leads to a family of generalized problems
where one instead considers the shifted lattice
$(\mathbb{N}+\sigma)\times(\mathbb{N}+\tau)$, for $\sigma, \tau >-1$. We show
that the nature of these problems are rather different depending on the shift
parameters, and in particular that the problem corresponding to harmonic
oscillators, $\sigma=\tau=-\tfrac12$, is a critical case.
|
[{'version': 'v1', 'created': 'Fri, 29 Dec 2017 14:58:21 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Oct 2018 12:35:36 GMT'}]
|
2018-10-09
|
[array(['Larson', 'Simon', ''], dtype=object)]
|
4,565 |
2103.04336
|
Christos Garoufis
|
Christos Garoufis, Athanasia Zlatintsi and Petros Maragos
|
HTMD-Net: A Hybrid Masking-Denoising Approach to Time-Domain Monaural
Singing Voice Separation
|
submitted for publication in EUSIPCO 2021
| null | null | null |
eess.AS cs.SD
|
http://creativecommons.org/licenses/by/4.0/
|
The advent of deep learning has led to the prevalence of deep neural network
architectures for monaural music source separation, with end-to-end approaches
that operate directly on the waveform level increasingly receiving research
attention. Among these approaches, transformation of the input mixture to a
learned latent space, and multiplicative application of a soft mask to the
latent mixture, achieves the best performance, but is prone to the introduction
of artifacts to the source estimate. To alleviate this problem, in this paper
we propose a hybrid time-domain approach, termed the HTMD-Net, combining a
lightweight masking component and a denoising module, based on skip
connections, in order to refine the source estimated by the masking procedure.
Evaluation of our approach in the task of monaural singing voice separation in
the musdb18 dataset indicates that our proposed method achieves competitive
performance compared to methods based purely on masking when trained under the
same conditions, especially regarding the behavior during silent segments,
while achieving higher computational efficiency.
|
[{'version': 'v1', 'created': 'Sun, 7 Mar 2021 12:24:37 GMT'}]
|
2021-03-09
|
[array(['Garoufis', 'Christos', ''], dtype=object)
array(['Zlatintsi', 'Athanasia', ''], dtype=object)
array(['Maragos', 'Petros', ''], dtype=object)]
|
4,566 |
hep-th/0506159
|
Sergio Montanez
|
Cesar Gomez, Sergio Montanez, Pedro Resco
|
Semi-Classical Mechanics in Phase Space: The Quantum Target of Minimal
Strings
|
16 pages, 6 figures
|
JHEP 0511 (2005) 049
|
10.1088/1126-6708/2005/11/049
|
IFT 05/30
|
hep-th
| null |
The target space $M_{p,q}$ of $(p,q)$ minimal strings is embedded into the
phase space of an associated integrable classical mechanical model. This map is
derived from the matrix model representation of minimal strings. Quantum
effects on the target space are obtained from the semiclassical mechanics in
phase space as described by the Wigner function. In the classical limit the
target space is a fold catastrophe of the Wigner function that is smoothed out
by quantum effects. Double scaling limit is obtained by resolving the
singularity of the Wigner function. The quantization rules for backgrounds with
ZZ branes are also derived.
|
[{'version': 'v1', 'created': 'Mon, 20 Jun 2005 12:10:38 GMT'}
{'version': 'v2', 'created': 'Tue, 13 Dec 2005 17:05:41 GMT'}]
|
2009-11-11
|
[array(['Gomez', 'Cesar', ''], dtype=object)
array(['Montanez', 'Sergio', ''], dtype=object)
array(['Resco', 'Pedro', ''], dtype=object)]
|
4,567 |
0810.2689
|
Marianne Lemoine-Goumard
|
HESS Collaboration: F. Aharonian, et al
|
Discovery of gamma-ray emission from the shell-type supernova remnant
RCW 86 with H.E.S.S
|
6 pages, 5 figures; Accepted for publication in ApJ on October 14,
2008
| null |
10.1088/0004-637X/692/2/1500
| null |
astro-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The shell-type supernova remnant (SNR) RCW 86, possibly associated with the
historical supernova SN 185, with its relatively large size (about 40' in
diameter) and the presence of non-thermal X-rays is a promising target for
gamma-ray observations. The high sensitivity, good angular resolution of a few
arc minutes and the large field of view of the High Energy Stereoscopic System
(H.E.S.S.) make it ideally suited for the study of the gamma-ray morphology of
such extended sources. H.E.S.S. observations have indeed led to the discovery
of the SNR RCW 86 in very high energy (VHE; E > 100 GeV) gamma-rays. With 31
hours of observation time, the source is detected with a statistical
significance of 8.5 sigma and is significantly more extended than the H.E.S.S.
point spread function. Morphological studies have been performed and show that
the gamma-ray flux does not correlate perfectly with the X-ray emission. The
flux from the remnant is ~10% of the flux from the Crab nebula, with a similar
photon index of about 2.5. Possible origins of the very high energy gamma-ray
emission, via either Inverse Compton scattering by electrons or the decay of
neutral pions produced by proton interactions, are discussed on the basis of
spectral features obtained both in the X-ray and gamma-ray regimes.
|
[{'version': 'v1', 'created': 'Wed, 15 Oct 2008 13:24:56 GMT'}]
|
2015-05-13
|
[array(['HESS Collaboration', '', ''], dtype=object)
array(['Aharonian', 'F.', ''], dtype=object)]
|
4,568 |
1911.01246
|
Misha Sumetsky
|
Qi Yu, Sajid Zaki, Yong Yang, Nikita Toropov, Xuewen Shu, and Misha
Sumetsky
|
Rectangular SNAP microresonator fabricated with a femtosecond laser
|
4 pages, 5 figures
|
Optics Letters 2019
|
10.1364/OL.44.005606
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
SNAP microresonators, which are fabricated by nanoscale effective radius
variation (ERV) of the optical fiber with sub-angstrom precision, can be
potentially used as miniature classical and quantum signal processors,
frequency comb generators, as well as ultraprecise microfluidic and
environmental optical sensors. Many of these applications require the
introduction of nanoscale ERV with a large contrast {\alpha} which is defined
as the maximum shift of the fiber cutoff wavelength introduced per unit length
of the fiber axis. The previously developed fabrication methods of SNAP
structures, which used focused CO2 and femtosecond laser beams, achieved
{\alpha} ~ 0.02 nm/um. Here we develop a new fabrication method of SNAP
microresonators with a femtosecond laser which allows us to demonstrate a
50-fold improvement of previous results and achieve {\alpha} ~ 1 nm/um.
Furthermore, our fabrication method enables the introduction of ERV which is
several times larger than the maximum ERV demonstrated previously. As an
example, we fabricate a rectangular SNAP resonator and investigate its group
delay characteristics. Our experimental results are in good agreement with
theoretical simulations. Overall, the developed approach allows us to reduce
the axial scale of SNAP structures by an order of magnitude.
|
[{'version': 'v1', 'created': 'Mon, 4 Nov 2019 14:33:42 GMT'}]
|
2020-01-08
|
[array(['Yu', 'Qi', ''], dtype=object)
array(['Zaki', 'Sajid', ''], dtype=object)
array(['Yang', 'Yong', ''], dtype=object)
array(['Toropov', 'Nikita', ''], dtype=object)
array(['Shu', 'Xuewen', ''], dtype=object)
array(['Sumetsky', 'Misha', ''], dtype=object)]
|
4,569 |
1512.05445
|
Alexis Rodriguez Carranza
|
Alexis Rodriguez Carranza, Marco A. P. Cabral, Juan C. Ponte Bejarano
|
Evidence of chaos and nonlinear dynamics in the Peruvian financial
market
| null | null | null | null |
nlin.CD
|
http://creativecommons.org/licenses/by/4.0/
|
Physicists experimentalists use a large number of observations of a
phenomenon, where are the unknown equations that describe it, in order to play
the dynamics and obtain information on their future behavior. In this article
we study the possibility of reproducing the dynamics of the phenomenon using
only a measurement scale. The Whitney immersion theorem ideas are presented and
generalization of Sauer for fractal sets to rebuild the asymptotic behaviour of
the phenomena and to investigate, chaotic behavior evidence in the reproduced
dynamics. The applications are made in the financial market which are only
known stock prices.
|
[{'version': 'v1', 'created': 'Thu, 17 Dec 2015 02:49:57 GMT'}]
|
2015-12-18
|
[array(['Carranza', 'Alexis Rodriguez', ''], dtype=object)
array(['Cabral', 'Marco A. P.', ''], dtype=object)
array(['Bejarano', 'Juan C. Ponte', ''], dtype=object)]
|
4,570 |
cond-mat/9703220
|
Frederic Lesage
|
F. Lesage, H. Saleur, P. Simonetti
|
Tunneling in quantum wires I: Exact solution of the spin isotropic case
|
Revtex, epsf, 14pgs, 4 figs. One reference added
| null |
10.1103/PhysRevB.56.7598
| null |
cond-mat.str-el hep-th
| null |
We show that the problem of impurity tunneling in a Luttinger liquid of
electrons with spin is solvable in the spin isotropic case ($g_\sigma=2$,
$g_\rho$ arbitrary). The resulting integrable model is similar to a two channel
anisotropic Kondo model, but with the impurity spin in a "cyclic
representation" of the quantum algebra $su(2)_q$ associated with the
anisotropy. Using exact, non-perturbative techniques we study the RG flow, and
compute the DC conductance. As expected from the analysis of Kane and Fisher we
find that the IR fixed point corresponds to two separate leads. We also prove
an exact duality between the UV and IR expansions of the current at vanishing
temperature.
|
[{'version': 'v1', 'created': 'Wed, 26 Mar 1997 00:05:39 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Apr 1997 17:33:08 GMT'}]
|
2009-10-30
|
[array(['Lesage', 'F.', ''], dtype=object)
array(['Saleur', 'H.', ''], dtype=object)
array(['Simonetti', 'P.', ''], dtype=object)]
|
4,571 |
1804.09261
|
Ali Hyder
|
Ali Hyder, Luca Martinazzi
|
Gluing metrics with prescribed $Q$-curvature and different asymptotic
behaviour in high dimension
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show a new example of blow-up behaviour for the prescribed $Q$-curvature
equation in even dimension $6$ and higher, namely given a sequence
$(V_k)\subset C^0(\mathbb{R}^{2n})$ suitably converging we construct {for
$n\geq 3$} a sequence $(u_k)$ of radially symmetric solutions to the equation
$${(-\Delta)^n u_k=V_k e^{2n u_k} \quad \text{in }\mathbb{R}^{2n},}$$ with
$u_k$ blowing up at the origin \emph{and} on a sphere. We also prove sharp
blow-up estimates. This is in sharp contrast with the $4$-dimensional case
studied by F. Robert (J. Diff. Eq. 2006).
|
[{'version': 'v1', 'created': 'Tue, 24 Apr 2018 21:20:30 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Jun 2019 20:02:25 GMT'}]
|
2019-06-05
|
[array(['Hyder', 'Ali', ''], dtype=object)
array(['Martinazzi', 'Luca', ''], dtype=object)]
|
4,572 |
cond-mat/9907125
|
Federico Ricci-Tersenghi
|
A. Pagnani, G. Parisi and F. Ricci-Tersenghi
|
Glassy transition in a disordered model for the RNA secondary structure
|
4 pages, 3 figures
|
Phys. Rev. Lett. 84, 2026 (2000)
|
10.1103/PhysRevLett.84.2026
| null |
cond-mat.dis-nn cond-mat.stat-mech q-bio.BM
| null |
We numerically study a disordered model for the RNA secondary structure and
we find that it undergoes a phase transition, with a breaking of the replica
symmetry in the low temperature region (like in spin glasses). Our results are
based on the exact evaluation of the partition function.
|
[{'version': 'v1', 'created': 'Thu, 8 Jul 1999 18:17:11 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Jul 1999 19:16:35 GMT'}
{'version': 'v3', 'created': 'Thu, 2 Mar 2000 10:05:36 GMT'}
{'version': 'v4', 'created': 'Wed, 6 Dec 2000 09:25:33 GMT'}]
|
2009-10-31
|
[array(['Pagnani', 'A.', ''], dtype=object)
array(['Parisi', 'G.', ''], dtype=object)
array(['Ricci-Tersenghi', 'F.', ''], dtype=object)]
|
4,573 |
0912.2148
|
Amir Shahmoradi
|
Amir Shahmoradi, Robert J. Nemiroff
|
Hardness as a Spectral Peak Estimator for Gamma-Ray Bursts
|
MNRAS submitted, Some technical side analyses removed or reduced
following the referee's review, 68 pages, 13 figures
| null |
10.1111/j.1365-2966.2010.16793.x
| null |
astro-ph.HE astro-ph.IM physics.data-an
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Simple hardness ratios are found to be a good estimator for the spectral peak
energy in Gamma-Ray Bursts (GRBs). Specifically, a high correlation strength is
found between the $\nu F_{\nu}$ peak in the spectrum of BATSE GRBs, $\epo$, and
the hardness of GRBs, $\hr$, as defined by the fluences in channels 3 and 4,
divided by the combined fluences in channels 1 and 2 of the BATSE Large Area
Detectors. The correlation is independent of the type of the burst, whether
Long-duration GRB (LGRB) or Short-duration (SGRB) and remains almost linear
over the wide range of the BATSE energy window (20-2000 KeV). Based on Bayes
theorem and Markov Chain Monte Carlo techniques, we also present multivariate
analyses of the observational data while accounting for data truncation and
sample-incompleteness. Prediction intervals for the proposed \hrep ~relation
are derived. Results and further simulations are used to compute $\epo$
estimates for nearly the entire BATSE catalog: 2130 GRBs. These results may be
useful for investigating the cosmological utility of the spectral peak in GRBs
intrinsic luminosity estimates.
|
[{'version': 'v1', 'created': 'Fri, 11 Dec 2009 16:22:29 GMT'}
{'version': 'v2', 'created': 'Thu, 4 Feb 2010 21:08:16 GMT'}]
|
2018-02-05
|
[array(['Shahmoradi', 'Amir', ''], dtype=object)
array(['Nemiroff', 'Robert J.', ''], dtype=object)]
|
4,574 |
1308.5314
|
Eitan Tadmor
|
Claude Bardos, Eitan Tadmor
|
Stability and spectral convergence of Fourier method for nonlinear
problems. On the shortcomings of the 2/3 de-aliasing method
| null | null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The high-order accuracy of Fourier method makes it the method of choice in
many large scale simulations. We discuss here the stability of Fourier method
for nonlinear evolution problems, focusing on the two prototypical cases of the
inviscid Burgers' equation and the multi-dimensional incompressible Euler
equations. The Fourier method for such problems with quadratic nonlinearities
comes in two main flavors. One is the spectral Fourier method. The other is the
2/3 pseudo-spectral Fourier method, where one removes the highest 1/3 portion
of the spectrum; this is often the method of choice to maintain the balance of
quadratic energy and avoid aliasing errors. Two main themes are discussed in
this paper. First, we prove that as long as the underlying exact solution has a
minimal C^{1+\alpha} spatial regularity, then both the spectral and the 2/3
pseudo-spectral Fourier methods are stable. Consequently, we prove their
spectral convergence for smooth solutions of the inviscid Burgers equation and
the incompressible Euler equations. On the other hand, we prove that after a
critical time at which the underlying solution lacks sufficient smoothness,
then both the spectral and the 2/3 pseudo-spectral Fourier methods exhibit
nonlinear instabilities which are realized through spurious oscillations. In
particular, after shock formation in inviscid Burgers' equation, the total
variation of bounded (pseudo-) spectral Fourier solutions must increase with
the number of increasing modes and we stipulate the analogous situation occurs
with the 3D incompressible Euler equations: the limiting Fourier solution is
shown to enforce L^2-energy conservation, and the contrast with energy
dissipating Onsager solutions is reflected through spurious oscillations.
|
[{'version': 'v1', 'created': 'Sat, 24 Aug 2013 10:38:18 GMT'}]
|
2013-08-27
|
[array(['Bardos', 'Claude', ''], dtype=object)
array(['Tadmor', 'Eitan', ''], dtype=object)]
|
4,575 |
1402.2098
|
Jan Moser
|
Jan Moser
|
Jacob's ladders, reverse iterations and new infinite set of
$L_2$-orthogonal systems generated by the Riemann $\zf$-function
| null | null | null | null |
math.CA
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
It is proved in this paper that continuum set of $L_2$-orthogonal systems
generated by the Riemann zeta-function on the critical line corresponds to
every fixed $L_2$-orthogonal system on a fixed segment. This theorem serves as
a resource for new set of integrals not accessible by the current methods in
the theory of the Riemann zeta-function.
\noindent Dedicated to the 100th anniversary of G.H. Hardy's fundamental
theorem: the function $\zf$ has an infinite set of zeros, \cite{1}.
|
[{'version': 'v1', 'created': 'Mon, 10 Feb 2014 10:55:44 GMT'}]
|
2014-02-11
|
[array(['Moser', 'Jan', ''], dtype=object)]
|
4,576 |
1210.7392
|
Amrit De
|
Amrit De and Craig E. Pryor
|
Electronic Structure and Optical Properties of the Lonsdaleite Phase of
Si, Ge and diamond
| null | null |
10.1088/0953-8984/26/4/045801
| null |
cond-mat.mtrl-sci cond-mat.mes-hall cond-mat.other quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Crystalline semiconductors may exist in different polytypic phases with
significantly different electronic and optical properties. In this paper, we
calculate the electronic structure and optical properties of diamond, Si and Ge
in the lonsdaleite (hexagonal-diamond) phase. We use an empirical
pseudopotentials method based on transferable model potentials, including
spin-orbit interactions. We obtain band structures, densities of states and
complex dielectric functions calculated in the dipole approximation for light
polarized perpendicular and parallel to the c-axis of the crystal. We find
strong polarization dependent optical anisotropy. Simple analytical expressions
are provided for the dispersion relations. We find that in the lonsdaleite
phase, diamond and Si remain indirect gap semiconductors while Ge is
transformed into a direct gap semiconductor with a significantly smaller band
gap.
|
[{'version': 'v1', 'created': 'Sun, 28 Oct 2012 02:39:50 GMT'}]
|
2014-02-27
|
[array(['De', 'Amrit', ''], dtype=object)
array(['Pryor', 'Craig E.', ''], dtype=object)]
|
4,577 |
2304.11997
|
Ramgopal Agrawal
|
Ramgopal Agrawal, Leticia F. Cugliandolo, Lara Faoro, Lev B. Ioffe,
and Marco Picco
|
Nonequilibrium critical dynamics of the bi-dimensional $\pm J$ Ising
model
|
26 pages, 10 figures
| null | null | null |
cond-mat.stat-mech quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The $\pm J$ Ising model is a simple frustrated spin model, where the exchange
couplings independently take the discrete value $-J$ with probability $p$ and
$+J$ with probability $1-p$. It is especially appealing due to its connection
to quantum error correcting codes. Here, we investigate the nonequilibrium
critical behavior of the bi-dimensional $\pm J$ Ising model, after a quench
from different initial conditions to a critical point $T_c(p)$ on the
paramagnetic-ferromagnetic (PF) transition line, especially, above, below and
at the multicritical Nishimori point (NP). The dynamical critical exponent
$z_c$ seems to exhibit non-universal behavior for quenches above and below the
NP, which is identified as a pre-asymptotic feature due to the repulsive fixed
point at the NP. Whereas, for a quench directly to the NP, the dynamics reaches
the asymptotic regime with $z_c \simeq 6.02(6)$. We also consider the
geometrical spin clusters (of like spin signs) during the critical dynamics.
Each universality class on the PF line is uniquely characterized by the
stochastic Loewner evolution (SLE) with corresponding parameter $\kappa$.
Moreover, for the critical quenches from the paramagnetic phase, the model,
irrespective of the frustration, exhibits an emergent critical percolation
topology at the large length scales.
|
[{'version': 'v1', 'created': 'Mon, 24 Apr 2023 11:02:33 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Apr 2023 16:29:01 GMT'}
{'version': 'v3', 'created': 'Tue, 30 May 2023 17:25:38 GMT'}]
|
2023-05-31
|
[array(['Agrawal', 'Ramgopal', ''], dtype=object)
array(['Cugliandolo', 'Leticia F.', ''], dtype=object)
array(['Faoro', 'Lara', ''], dtype=object)
array(['Ioffe', 'Lev B.', ''], dtype=object)
array(['Picco', 'Marco', ''], dtype=object)]
|
4,578 |
hep-ph/0508172
|
Osamu Seto
|
Osamu Seto and Jun'ichi Yokoyama
|
Hiding cosmic strings in supergravity D-term inflation
|
15 pages, 4 figures
|
Phys.Rev. D73 (2006) 023508
|
10.1103/PhysRevD.73.023508
|
RESCEU-35/05
|
hep-ph astro-ph
| null |
The influence of higher-order terms in the K\"{a}hler potential of the
supergravity D-term inflation model on the density perturbation is studied. We
show that these terms can make the inflaton potential flatter, which lowers the
energy scale of inflation under the COBE/WMAP normalization. As a result, the
mass per unit length of cosmic strings, which are produced at the end of
inflation, can be reduced to a harmless but detectable level without
introducing a tiny Yukawa coupling. Our scenario can naturally be implemented
in models with a low cut-off as in Type I or Type IIB orientifold models.
|
[{'version': 'v1', 'created': 'Tue, 16 Aug 2005 13:41:51 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Mar 2006 12:28:50 GMT'}]
|
2009-11-11
|
[array(['Seto', 'Osamu', ''], dtype=object)
array(['Yokoyama', "Jun'ichi", ''], dtype=object)]
|
4,579 |
2212.02811
|
Jiakang Zheng
|
Jiakang Zheng, Jiayi Zhang, Julian Cheng, Victor C. M. Leung, Derrick
Wing Kwan Ng, Bo Ai
|
Asynchronous Cell-Free Massive MIMO With Rate-Splitting
|
34 pages, 11 figures, Accepted in IEEE Journal on Selected Areas in
Communications
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In practical cell-free (CF) massive multiple-input multiple-output (MIMO)
networks with distributed and low-cost access points, the asynchronous arrival
of signals at the user equipments increases multi-user interference that
degrades the system performance. Meanwhile, rate-splitting (RS), exploiting the
transmission of both common and private messages, has demonstrated to offer
considerable spectral efficiency (SE) improvements and its robustness against
channel state information (CSI) imperfection. The signal performance of a CF
massive MIMO system is first analyzed for asynchronous reception capturing the
joint effects of propagation delays and oscillator phases of transceivers.
Taking into account the imperfect CSI caused by asynchronous phases and pilot
contamination, we derive novel and closed-form downlink SE expressions for
characterizing the performance of both the RS-assisted and conventional
non-RS-based systems adopting coherent and non-coherent data transmission
schemes, respectively. Moreover, we formulate the design of robust precoding
for the common messages as an optimization problem that maximizes the minimum
individual SE of the common message. To address the non-convexity of the design
problem, a bisection method is proposed to solve the problem optimally.
Simulation results show that asynchronous reception indeed destroys both the
orthogonality of the pilots and the coherent data transmission resulting in
poor system performance. Besides, thanks to the uniform coverage properties of
CF massive MIMO systems, RS with a simple low-complexity precoding for the
common message obtained by the equal ratio sum of the private precoding is able
to achieve substantial downlink sum SE gains, while the application of robust
precoding to the common message is shown to be useful in some extreme cases,
e.g., serious oscillator mismatch and unknown delay phase.
|
[{'version': 'v1', 'created': 'Tue, 6 Dec 2022 08:01:50 GMT'}]
|
2022-12-07
|
[array(['Zheng', 'Jiakang', ''], dtype=object)
array(['Zhang', 'Jiayi', ''], dtype=object)
array(['Cheng', 'Julian', ''], dtype=object)
array(['Leung', 'Victor C. M.', ''], dtype=object)
array(['Ng', 'Derrick Wing Kwan', ''], dtype=object)
array(['Ai', 'Bo', ''], dtype=object)]
|
4,580 |
1210.6558
|
Aigen Li
|
Aigen Li and B. T. Draine
|
The Carriers of the Interstellar Unidentified Infrared Emission
Features: Aromatic or Aliphatic?
|
10 pages, 2 figures, accepted for publication in ApJ Letters
| null |
10.1088/2041-8205/760/2/L35
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, and
11.3 micrometer, commonly attributed to polycyclic aromatic hydrocarbon (PAH)
molecules, have been recently ascribed to coal- or kerogen-like organic
nanoparticles with a mixed aromatic-aliphatic structure. However, we show in
this Letter that this hypothesis is inconsistent with observations. We estimate
the aliphatic fraction of the UIE carriers based on the observed intensities of
the 3.4 and 6.85 micrometer emission features by attributing them exclusively
to aliphatic C-H stretch and aliphatic C-H deformation vibrational modes,
respectively. We derive the fraction of carbon atoms in aliphatic form to be
<15%. We conclude that the UIE emitters are predominantly aromatic with
aliphatic material at most a minor part of the UIE carriers. The PAH model is
consistent with astronomical observations and PAHs dominate the strong UIE
bands.
|
[{'version': 'v1', 'created': 'Wed, 24 Oct 2012 14:55:46 GMT'}]
|
2015-06-11
|
[array(['Li', 'Aigen', ''], dtype=object)
array(['Draine', 'B. T.', ''], dtype=object)]
|
4,581 |
1812.05999
|
Renaud Chr\'etien
|
Renaud Chr\'etien, Josef Rammensee, Julien Dujardin, Cyril Petitjean,
and Peter Schlagheck
|
Al'tshuler-Aronov-Spivak oscillations of bosonic matter-wave beams in
the presence of interaction
| null |
Phys. Rev. A 100, 033606 (2019)
|
10.1103/PhysRevA.100.033606
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We theoretically study the propagation of a guided atom laser across an
Aharonov-Bohm ring which is exposed to a synthetic gauge field. The presence of
disorder within the ring gives rise to Al'tshuler-Aronov-Spivak oscillations,
seen in the disorder average of the transmission as a function of the effective
gauge flux that is contained within the ring. Those oscillations are induced by
coherent backscattering and represent a manifestation of weak localization.
Through analytical and numerical calculations that are based on the mean-field
Gross-Pitaevskii approximation for the propagating Bose-Einstein condensate, we
show that the presence of a very weak atom-atom interaction within the ring
leads to an inversion of the Al'tshuler-Aronov-Spivak oscillations, in a very
similar manner as for the coherent backscattering of Bose-Einstein condensates
within two-dimensional disorder potentials. Numerical simulations based on the
Truncated Wigner method reveal that this signature of weak antilocalization
becomes washed out if the interaction strength is increased.
|
[{'version': 'v1', 'created': 'Fri, 14 Dec 2018 16:06:55 GMT'}
{'version': 'v2', 'created': 'Fri, 6 Sep 2019 08:14:58 GMT'}]
|
2019-09-09
|
[array(['Chrétien', 'Renaud', ''], dtype=object)
array(['Rammensee', 'Josef', ''], dtype=object)
array(['Dujardin', 'Julien', ''], dtype=object)
array(['Petitjean', 'Cyril', ''], dtype=object)
array(['Schlagheck', 'Peter', ''], dtype=object)]
|
4,582 |
1806.02978
|
Zhe Gan
|
Yunchen Pu, Shuyang Dai, Zhe Gan, Weiyao Wang, Guoyin Wang, Yizhe
Zhang, Ricardo Henao, Lawrence Carin
|
JointGAN: Multi-Domain Joint Distribution Learning with Generative
Adversarial Nets
|
Accepted by ICML 2018
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A new generative adversarial network is developed for joint distribution
matching. Distinct from most existing approaches, that only learn conditional
distributions, the proposed model aims to learn a joint distribution of
multiple random variables (domains). This is achieved by learning to sample
from conditional distributions between the domains, while simultaneously
learning to sample from the marginals of each individual domain. The proposed
framework consists of multiple generators and a single softmax-based critic,
all jointly trained via adversarial learning. From a simple noise source, the
proposed framework allows synthesis of draws from the marginals, conditional
draws given observations from a subset of random variables, or complete draws
from the full joint distribution. Most examples considered are for joint
analysis of two domains, with examples for three domains also presented.
|
[{'version': 'v1', 'created': 'Fri, 8 Jun 2018 06:01:34 GMT'}]
|
2018-06-11
|
[array(['Pu', 'Yunchen', ''], dtype=object)
array(['Dai', 'Shuyang', ''], dtype=object)
array(['Gan', 'Zhe', ''], dtype=object)
array(['Wang', 'Weiyao', ''], dtype=object)
array(['Wang', 'Guoyin', ''], dtype=object)
array(['Zhang', 'Yizhe', ''], dtype=object)
array(['Henao', 'Ricardo', ''], dtype=object)
array(['Carin', 'Lawrence', ''], dtype=object)]
|
4,583 |
0908.1676
|
Patrick Kuppinger
|
Patrick Kuppinger, Giuseppe Durisi, and Helmut B\"olcskei
|
Improved Sparsity Thresholds Through Dictionary Splitting
|
IEEE Information Theory Workshop (ITW), Taormina, Italy, Oct. 2009,
to appear
| null |
10.1109/ITW.2009.5351511
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Known sparsity thresholds for basis pursuit to deliver the maximally sparse
solution of the compressed sensing recovery problem typically depend on the
dictionary's coherence. While the coherence is easy to compute, it can lead to
rather pessimistic thresholds as it captures only limited information about the
dictionary. In this paper, we show that viewing the dictionary as the
concatenation of two general sub-dictionaries leads to provably better sparsity
thresholds--that are explicit in the coherence parameters of the dictionary and
of the individual sub-dictionaries. Equivalently, our results can be
interpreted as sparsity thresholds for dictionaries that are unions of two
general (i.e., not necessarily orthonormal) sub-dictionaries.
|
[{'version': 'v1', 'created': 'Wed, 12 Aug 2009 10:48:51 GMT'}]
|
2016-11-18
|
[array(['Kuppinger', 'Patrick', ''], dtype=object)
array(['Durisi', 'Giuseppe', ''], dtype=object)
array(['Bölcskei', 'Helmut', ''], dtype=object)]
|
4,584 |
hep-th/0509199
|
Mattias N. R. Wohlfarth
|
Georg M. von Hippel, Mattias N.R. Wohlfarth
|
Covariant canonical quantization
|
27 pages, REVTeX4, revised version
|
Eur.Phys.J.C47:861-872,2006
|
10.1140/epjc/s2006-02595-5
|
ZMP-HH/05-18
|
hep-th
| null |
We present a manifestly covariant quantization procedure based on the de
Donder--Weyl Hamiltonian formulation of classical field theory. This procedure
agrees with conventional canonical quantization only if the parameter space is
$d=1$ dimensional time. In $d>1$ dimensions, covariant canonical quantization
requires a fundamental length scale, and any bosonic field generates a
spinorial wave function, leading to the emergence of spinors as a byproduct of
quantization. We provide a probabilistic interpretation of the wave functions
for the fields, and apply the formalism to a number of simple examples. These
show that covariant canonical quantization produces both the Klein-Gordon and
the Dirac equation, while also predicting the existence of discrete towers of
identically charged fermions with different masses. Covariant canonical
quantization can thus be understood as a `first' or pre-quantization within the
framework of conventional QFT.
|
[{'version': 'v1', 'created': 'Tue, 27 Sep 2005 13:38:48 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Jun 2006 17:13:22 GMT'}]
|
2009-01-07
|
[array(['von Hippel', 'Georg M.', ''], dtype=object)
array(['Wohlfarth', 'Mattias N. R.', ''], dtype=object)]
|
4,585 |
2006.07168
|
Brian C. Hall
|
Brian C. Hall and Ching-Wei Ho
|
The Brown measure of the sum of a self-adjoint element and an imaginary
multiple of a semicircular element
|
50 pages and 9 figures. Minor revisions in this version. To appear on
Letters in Mathematical Physics
|
Letters in Mathematical Physics, Volume 112, Article 19 (2022)
|
10.1007/s11005-022-01516-3
| null |
math.PR hep-th math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compute the Brown measure of $x_{0}+i\sigma_{t}$, where $\sigma_{t}$ is a
free semicircular Brownian motion and $x_{0}$ is a freely independent
self-adjoint element that is not a multiple of the identity. The Brown measure
is supported in the closure of a certain bounded region $\Omega_{t}$ in the
plane. In $\Omega_{t},$ the Brown measure is absolutely continuous with respect
to Lebesgue measure, with a density that is constant in the vertical direction.
Our results refine and rigorize results of Janik, Nowak, Papp, Wambach, and
Zahed and of Jarosz and Nowak in the physics literature.
We also show that pushing forward the Brown measure of $x_{0}+i\sigma_{t}$ by
a certain map $Q_{t}:\Omega_{t}\rightarrow\mathbb{R}$ gives the distribution of
$x_{0}+\sigma_{t}.$ We also establish a similar result relating the Brown
measure of $x_{0}+i\sigma_{t}$ to the Brown measure of $x_{0}+c_{t}$, where
$c_{t}$ is the free circular Brownian motion.
|
[{'version': 'v1', 'created': 'Fri, 12 Jun 2020 13:24:38 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Feb 2022 19:51:52 GMT'}]
|
2022-05-02
|
[array(['Hall', 'Brian C.', ''], dtype=object)
array(['Ho', 'Ching-Wei', ''], dtype=object)]
|
4,586 |
0811.3756
|
Manwai Yuen
|
Manwai Yuen
|
Analytical Collapsing Solutions to Pressureless Navier-Stokes-Poisson
Equations with Density-dependent Viscosity $\theta=1/2$ in $R^{2}$
|
8 pages
| null | null | null |
astro-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the 2-dimensional Navier-Stokes-Poisson equations with
density-dependent viscosity $\theta=1/2$ without pressure of gaseous stars in
astrophysics. The analytical solutions with collapsing in radial symmetry, are
constructed in this paper.
|
[{'version': 'v1', 'created': 'Mon, 24 Nov 2008 08:53:31 GMT'}]
|
2008-11-25
|
[array(['Yuen', 'Manwai', ''], dtype=object)]
|
4,587 |
quant-ph/0211198
|
Thomas David Voice
|
Y. Suhov and T. Voice
|
Entanglement For Ideal Quantum Ensembles
|
paper withdrawn
| null | null | null |
quant-ph
| null |
This paper has been withdrawn by the authors, due to the discovery of paper
0201028 which predates it and contains most of it's results.
|
[{'version': 'v1', 'created': 'Fri, 29 Nov 2002 12:52:58 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Jan 2003 13:38:14 GMT'}
{'version': 'v3', 'created': 'Tue, 14 Jan 2003 13:31:45 GMT'}
{'version': 'v4', 'created': 'Thu, 13 Feb 2003 16:43:34 GMT'}
{'version': 'v5', 'created': 'Fri, 14 Feb 2003 15:01:42 GMT'}]
|
2007-05-23
|
[array(['Suhov', 'Y.', ''], dtype=object)
array(['Voice', 'T.', ''], dtype=object)]
|
4,588 |
cond-mat/0102441
|
Mike Sumption
|
M.D. Sumption (1), X. Peng (1), E. Lee (1), M. Tomsic (2), and E.W.
Collings (1) ((1) LASM, MSE, The Ohio State University, (2) Hyper Tech
Research)
|
Transport Current in MgB2 based Superconducting Strand at 4.2 K and
Self-Field
|
7 pages, 1 Fig. 2 tables, minor editiorial revision
| null | null | null |
cond-mat.supr-con
| null |
Transport current values of 7.5 x 104 A/cm2 at 4.2 K and self-field are
reported for MbB2-based tapes. MgB2 strands were formed by directly filling
commercially available MgB2 powder into Nb-lined, monel tubes and wire drawing.
The wires were then rolled into tapes 2.56 x 0.32 mm2, with a total
superconducting cross section of 0.2319 mm2. Transport measurements were
performed using a standard four-point technique at T = 4.2 K (in liquid helium)
and at self field. Three samples were prepared, with heat treatments of
900C for 1, 2, and 3 h under 1/3 at Ar. Measured values of transport
current were 4.7, 7.5, and 1.1 x 104 A/cm2, respectively, at 4.2 K and self
field. M-H loops taken on the sample HT for 1 h showed magnetic Jcs of 4.2 x
104 A/cm2 at 4.2 K and 1 T, indicating that the material had reasonably well
connected grains.
|
[{'version': 'v1', 'created': 'Fri, 23 Feb 2001 22:13:06 GMT'}
{'version': 'v2', 'created': 'Mon, 26 Feb 2001 14:22:11 GMT'}]
|
2007-05-23
|
[array(['Sumption', 'M. D.', ''], dtype=object)
array(['Peng', 'X.', ''], dtype=object)
array(['Lee', 'E.', ''], dtype=object)
array(['Tomsic', 'M.', ''], dtype=object)
array(['Collings', 'E. W.', ''], dtype=object)]
|
4,589 |
1502.00804
|
Ronan Cummins
|
Ronan Cummins, Jiaul Hoque Paik, and Yuanhua Lv
|
A Polya Urn Document Language Model for Improved Information Retrieval
|
37 page journal submission (accepted for publication in TOIS)
| null | null | null |
cs.IR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The multinomial language model has been one of the most effective models of
retrieval for over a decade. However, the multinomial distribution does not
model one important linguistic phenomenon relating to term-dependency, that is
the tendency of a term to repeat itself within a document (i.e. word
burstiness). In this article, we model document generation as a random process
with reinforcement (a multivariate Polya process) and develop a Dirichlet
compound multinomial language model that captures word burstiness directly.
We show that the new reinforced language model can be computed as efficiently
as current retrieval models, and with experiments on an extensive set of TREC
collections, we show that it significantly outperforms the state-of-the-art
language model for a number of standard effectiveness metrics. Experiments also
show that the tuning parameter in the proposed model is more robust than in the
multinomial language model. Furthermore, we develop a constraint for the
verbosity hypothesis and show that the proposed model adheres to the
constraint. Finally, we show that the new language model essentially introduces
a measure closely related to idf which gives theoretical justification for
combining the term and document event spaces in tf-idf type schemes.
|
[{'version': 'v1', 'created': 'Tue, 3 Feb 2015 10:41:12 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Mar 2015 23:39:28 GMT'}]
|
2015-03-09
|
[array(['Cummins', 'Ronan', ''], dtype=object)
array(['Paik', 'Jiaul Hoque', ''], dtype=object)
array(['Lv', 'Yuanhua', ''], dtype=object)]
|
4,590 |
1209.0132
|
Mikhail Litsarev S
|
Mikhail S. Litsarev, Igor Di Marco, Patrik Thunstrom, Olle Eriksson
|
Correlated electronic structure and chemical bonding of Ce pnictides and
gamma-Ce
|
7 pages, 8 figures
|
Phys. Rev. B 86, 115116 (2012)
|
10.1103/PhysRevB.86.115116
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present calculated spectral properties and lattice parameters for cerium
pnictides (CeN, CeP, CeAs, CeSb, CeBi) and gamma-Ce, within the LDA/GGA+DMFT
(local density approximation/generalized gradient approximation + dynamical
mean field theory) approach. The effective impurity model arising in the DMFT
is solved by using the spin-polarized T-matrix fluctuation-exchange (SPTF)
solver for CeN compound, and the Hubbard I (HI) solver for CeP, CeAs, CeSb, and
CeBi. For all the addressed compounds the calculated spectral properties are in
reasonable agreement with measured photoelectron spectra at high binding
energies. At low binding energies the HI approximation does not manage to
capture the Kondo-like peak observed for several of the Ce-pnictides.
Nevertheless, the calculated lattice constants are in a good agreement with
available experimental data, showing that the such a peak does not play a major
role on the bonding properties. Furthermore, the HI calculations are compared
to a simpler treatment of the Ce 4f electron as core-like in LDA/GGA for CeP,
CeAs, CeSb, and CeBi, and the two approaches are found to give similar results.
|
[{'version': 'v1', 'created': 'Sat, 1 Sep 2012 20:34:57 GMT'}]
|
2015-04-23
|
[array(['Litsarev', 'Mikhail S.', ''], dtype=object)
array(['Di Marco', 'Igor', ''], dtype=object)
array(['Thunstrom', 'Patrik', ''], dtype=object)
array(['Eriksson', 'Olle', ''], dtype=object)]
|
4,591 |
2003.05470
|
Phil Short
|
P. Short, M. Nicholl, A. Lawrence, S. Gomez, I. Arcavi, T. Wevers, G.
Leloudas, S. Schulze, J. P. Anderson, E. Berger, P. K. Blanchard, J. Burke,
N. Castro Segura, P. Charalampopoulos, R. Chornock, L. Galbany, M. Gromadzki,
L. J. Herzog, D. Hiramatsu, Keith Horne, G. Hosseinzadeh, D. Andrew Howell,
N. Ihanec, C. Inserra, E. Kankare, K. Maguire, C. McCully, T. E. M\"uller
Bravo, F. Onori, J. Sollerman, D. R. Young
|
The Tidal Disruption Event AT 2018hyz I: Double-peaked emission lines
and a flat Balmer decrement
|
Published in MNRAS. Accompanied by companion paper Gomez et al.
(2020)
| null |
10.1093/mnras/staa2065
| null |
astro-ph.GA astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present results from spectroscopic observations of AT 2018hyz, a transient
discovered by the ASAS-SN survey at an absolute magnitude of $M_V\sim -20.2$
mag, in the nucleus of a quiescent galaxy with strong Balmer absorption lines.
AT 2018hyz shows a blue spectral continuum and broad emission lines, consistent
with previous TDE candidates. High cadence follow-up spectra show broad Balmer
lines and He I in early spectra, with He II making an appearance after
$\sim70-100$ days. The Balmer lines evolve from a smooth broad profile, through
a boxy, asymmetric double-peaked phase consistent with accretion disc emission,
and back to smooth at late times. The Balmer lines are unlike typical AGN in
that they show a flat Balmer decrement (H$\alpha$/H$\beta\sim1.5$), suggesting
the lines are collisionally excited rather than being produced via
photo-ionisation. The flat Balmer decrement together with the complex profiles
suggest that the emission lines originate in a disc chromosphere, analogous to
those seen in cataclysmic variables. The low optical depth of material due to a
possible partial disruption may be what allows us to observe these
double-peaked, collisionally excited lines. The late appearance of He II may be
due to an expanding photosphere or outflow, or late-time shocks in debris
collisions.
|
[{'version': 'v1', 'created': 'Wed, 11 Mar 2020 18:15:06 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Sep 2020 16:07:04 GMT'}]
|
2020-09-25
|
[array(['Short', 'P.', ''], dtype=object)
array(['Nicholl', 'M.', ''], dtype=object)
array(['Lawrence', 'A.', ''], dtype=object)
array(['Gomez', 'S.', ''], dtype=object)
array(['Arcavi', 'I.', ''], dtype=object)
array(['Wevers', 'T.', ''], dtype=object)
array(['Leloudas', 'G.', ''], dtype=object)
array(['Schulze', 'S.', ''], dtype=object)
array(['Anderson', 'J. P.', ''], dtype=object)
array(['Berger', 'E.', ''], dtype=object)
array(['Blanchard', 'P. K.', ''], dtype=object)
array(['Burke', 'J.', ''], dtype=object)
array(['Segura', 'N. Castro', ''], dtype=object)
array(['Charalampopoulos', 'P.', ''], dtype=object)
array(['Chornock', 'R.', ''], dtype=object)
array(['Galbany', 'L.', ''], dtype=object)
array(['Gromadzki', 'M.', ''], dtype=object)
array(['Herzog', 'L. J.', ''], dtype=object)
array(['Hiramatsu', 'D.', ''], dtype=object)
array(['Horne', 'Keith', ''], dtype=object)
array(['Hosseinzadeh', 'G.', ''], dtype=object)
array(['Howell', 'D. Andrew', ''], dtype=object)
array(['Ihanec', 'N.', ''], dtype=object)
array(['Inserra', 'C.', ''], dtype=object)
array(['Kankare', 'E.', ''], dtype=object)
array(['Maguire', 'K.', ''], dtype=object)
array(['McCully', 'C.', ''], dtype=object)
array(['Bravo', 'T. E. Müller', ''], dtype=object)
array(['Onori', 'F.', ''], dtype=object)
array(['Sollerman', 'J.', ''], dtype=object)
array(['Young', 'D. R.', ''], dtype=object)]
|
4,592 |
1112.5100
|
Cms Collaboration
|
CMS Collaboration
|
Measurement of the charge asymmetry in top-quark pair production in
proton-proton collisions at sqrt(s) = 7 TeV
| null |
Phys. Lett. B 709 (2012) 28
|
10.1016/j.physletb.2012.01.078
|
CMS-TOP-11-014; CERN-PH-EP-2011-217
|
hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The difference in angular distributions between top quarks and antiquarks,
commonly referred to as the charge asymmetry, is measured in pp collisions at
the LHC with the CMS experiment. The data sample corresponds to an integrated
luminosity of 1.09 inverse femtobarns at a centre-of-mass energy of 7 TeV.
Top-quark pairs are selected in the final state with an electron or muon and
four or more jets. At least one jet is identified as originating from b-quark
hadronization. The charge asymmetry is measured in two variables, one based on
the pseudorapidities (eta) of the top quarks and the other on their rapidities
(y). The results A[C,eta] = -0.017 +/- 0.032 (stat.) + [+0.025/-0.036] (syst.)
and A[C,y] = -0.013 +/- 0.028 (stat.) + [+0.029/-0.031] (syst.) are consistent
within uncertainties with the standard-model predictions.
|
[{'version': 'v1', 'created': 'Wed, 21 Dec 2011 17:17:27 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Dec 2011 15:07:08 GMT'}]
|
2012-08-27
|
[array(['CMS Collaboration', '', ''], dtype=object)]
|
4,593 |
2306.05624
|
Yanxiong Li
|
Yufei Zeng, Yanxiong Li, Zhenfeng Zhou, Ruiqi Wang, Difeng Lu
|
Domestic Activities Classification from Audio Recordings Using
Multi-scale Dilated Depthwise Separable Convolutional Network
|
5 pages, 2 figures, 4 tables. Accepted for publication in IEEE
MMSP2021
| null | null | null |
eess.AS cs.SD
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Domestic activities classification (DAC) from audio recordings aims at
classifying audio recordings into pre-defined categories of domestic
activities, which is an effective way for estimation of daily activities
performed in home environment. In this paper, we propose a method for DAC from
audio recordings using a multi-scale dilated depthwise separable convolutional
network (DSCN). The DSCN is a lightweight neural network with small size of
parameters and thus suitable to be deployed in portable terminals with limited
computing resources. To expand the receptive field with the same size of DSCN's
parameters, dilated convolution, instead of normal convolution, is used in the
DSCN for further improving the DSCN's performance. In addition, the embeddings
of various scales learned by the dilated DSCN are concatenated as a multi-scale
embedding for representing property differences among various classes of
domestic activities. Evaluated on a public dataset of the Task 5 of the 2018
challenge on Detection and Classification of Acoustic Scenes and Events
(DCASE-2018), the results show that: both dilated convolution and multi-scale
embedding contribute to the performance improvement of the proposed method; and
the proposed method outperforms the methods based on state-of-the-art
lightweight network in terms of classification accuracy.
|
[{'version': 'v1', 'created': 'Fri, 9 Jun 2023 02:15:33 GMT'}]
|
2023-06-12
|
[array(['Zeng', 'Yufei', ''], dtype=object)
array(['Li', 'Yanxiong', ''], dtype=object)
array(['Zhou', 'Zhenfeng', ''], dtype=object)
array(['Wang', 'Ruiqi', ''], dtype=object)
array(['Lu', 'Difeng', ''], dtype=object)]
|
4,594 |
2209.15575
|
Yan Gao
|
Yan Gao, Javier Fernandez-Marques, Titouan Parcollet, Pedro P. B. de
Gusmao, Nicholas D. Lane
|
Match to Win: Analysing Sequences Lengths for Efficient Self-supervised
Learning in Speech and Audio
| null | null | null | null |
cs.SD cs.LG eess.AS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Self-supervised learning (SSL) has proven vital in speech and audio-related
applications. The paradigm trains a general model on unlabeled data that can
later be used to solve specific downstream tasks. This type of model is costly
to train as it requires manipulating long input sequences that can only be
handled by powerful centralised servers. Surprisingly, despite many attempts to
increase training efficiency through model compression, the effects of
truncating input sequence lengths to reduce computation have not been studied.
In this paper, we provide the first empirical study of SSL pre-training for
different specified sequence lengths and link this to various downstream tasks.
We find that training on short sequences can dramatically reduce resource costs
while retaining a satisfactory performance for all tasks. This simple one-line
change would promote the migration of SSL training from data centres to
user-end edge devices for more realistic and personalised applications.
|
[{'version': 'v1', 'created': 'Fri, 30 Sep 2022 16:35:42 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Oct 2022 20:15:26 GMT'}
{'version': 'v3', 'created': 'Fri, 11 Nov 2022 21:00:12 GMT'}
{'version': 'v4', 'created': 'Tue, 22 Nov 2022 12:05:42 GMT'}]
|
2022-11-23
|
[array(['Gao', 'Yan', ''], dtype=object)
array(['Fernandez-Marques', 'Javier', ''], dtype=object)
array(['Parcollet', 'Titouan', ''], dtype=object)
array(['de Gusmao', 'Pedro P. B.', ''], dtype=object)
array(['Lane', 'Nicholas D.', ''], dtype=object)]
|
4,595 |
2112.09527
|
Amir Boag
|
Gregory Ya. Slepyan, Dmitri Mogilevtsev, Ilay Levie, and Amir Boag
|
Modeling of Multimodal Scattering by Conducting Bodies in Quantum
Optics: the Method of Characteristic Modes
| null | null | null | null |
quant-ph physics.app-ph physics.comp-ph physics.optics
|
http://creativecommons.org/licenses/by/4.0/
|
We propose a numerical technique for modeling the quantum multimode light
scattering by a perfectly conducting body. Using the novel quantization
technique, we give the quantum adaptation of the characteristic mode approach
widely used in the classical electrodynamics. The method is universal with
respect to the body's configuration, as well as its dimensions relative to the
wavelength. Using this method and calculating the first- and the second-order
field correlation functions, we demonstrate how scattering affects
quantum-statistical features of the field. As an example, we consider
scattering of the two single-photon incident Gaussian beams on the cylinder
with circular cross-section. We show that the scattering is accompanied by the
two-photon interference and demonstrates the Hong-Ou-Mandel effect. It is
shown, that the scattered two-photon field and its correlations are able to
manifest a varying directive propagation, which is controllable by various
means (angles of incidence, configuration of the body, relations between its
sizes with the frequency). We expect that this method will be useful for
designing quantum-optical devices.
|
[{'version': 'v1', 'created': 'Fri, 17 Dec 2021 14:25:59 GMT'}]
|
2021-12-20
|
[array(['Slepyan', 'Gregory Ya.', ''], dtype=object)
array(['Mogilevtsev', 'Dmitri', ''], dtype=object)
array(['Levie', 'Ilay', ''], dtype=object)
array(['Boag', 'Amir', ''], dtype=object)]
|
4,596 |
0812.3886
|
Raphael Flauger
|
Raphael Flauger, Sonia Paban, Daniel Robbins, Timm Wrase
|
On Slow-roll Moduli Inflation in Massive IIA Supergravity with Metric
Fluxes
|
34 pages, v3: summary table added, comments added, accepted for
publication in PRD
|
Phys.Rev.D79:086011,2009
|
10.1103/PhysRevD.79.086011
|
UTTG-09-08,MPI-2008-170
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We derive several no-go theorems in the context of massive type IIA string
theory compactified to four dimensions in a way that, in the absence of fluxes,
preserves N=1 supersymmetry. Our derivation is based on the dilaton, Kaehler
and complex structure moduli dependence of the potential of the
four-dimensional effective field theory, that is generated by the presence of
D6-branes, O6-planes, RR-fluxes, NSNS 3-form flux, and geometric fluxes. To
demonstrate the usefulness of our theorems, we apply them to the most commonly
studied class of toroidal orientifolds. We show that for all but two of the
models in this class the slow-roll parameter \epsilon is bounded from below by
numbers of order unity as long as the fluxes satisfy the Bianchi identities,
ruling out slow-roll inflation and even the existence of de Sitter extrema in
these models. For the two cases that avoid the no-go theorems, we provide some
details of our numerical studies, demonstrating that small \epsilon can indeed
be achieved. We stress that there seems to be an \eta-problem, however,
suggesting that none of the models in this class are viable from a cosmological
point of view at least at large volume, small string coupling, and leading
order in the \alpha'-expansion.
|
[{'version': 'v1', 'created': 'Fri, 19 Dec 2008 20:57:31 GMT'}
{'version': 'v2', 'created': 'Sun, 21 Dec 2008 20:55:01 GMT'}
{'version': 'v3', 'created': 'Wed, 8 Apr 2009 15:58:18 GMT'}]
|
2009-08-03
|
[array(['Flauger', 'Raphael', ''], dtype=object)
array(['Paban', 'Sonia', ''], dtype=object)
array(['Robbins', 'Daniel', ''], dtype=object)
array(['Wrase', 'Timm', ''], dtype=object)]
|
4,597 |
2206.09792
|
Holly Mandel
|
Holly Mandel
|
Degenerations of Negative K\"ahler-Einstein Surfaces
| null | null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Every compact K\"ahler manifold with negative first Chern class admits a
unique metric $g$ such that $\text{Ric}(g) = -g$. Understanding how families of
these metrics degenerate gives insight into their geometry and is important for
understanding the compactification of the moduli space of negative
K\"ahler-Einstein metrics. I study a special class of such families in complex
dimension two. Following the work of Sun and Zhang (2019) in the Calabi-Yau
case, I construct a K\"ahler-Einstein neck region interpolating between
canonical metrics on components of the central fiber. This provides a model for
the limiting geometry of metrics in the family.
|
[{'version': 'v1', 'created': 'Mon, 20 Jun 2022 14:21:11 GMT'}]
|
2022-06-22
|
[array(['Mandel', 'Holly', ''], dtype=object)]
|
4,598 |
1201.3576
|
Clifford Bishop
|
Zhao-Ming Wang, Rui-Song Ma, C. Allen Bishop, and Yong-Jian Gu
|
Quantum state transfer through a spin chain in a multi-excitation
subspace
|
5 pages, 4 figures
|
Phys. Rev. A 86, 022330 (2012)
|
10.1103/PhysRevA.86.022330
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the quality of quantum state transfer through a uniformly
coupled antiferromagnetic spin chain in a multi-excitation subspace. The
fidelity of state transfer using multi-excitation channels is found to compare
well with communication protocols based on the ground state of a spin chain
with ferromagnetic interactions. Our numerical results support the conjecture
that the fidelity of state transfer through a multi-excitation subspace only
depends on the number of initial excitations present in the chain and is
independent of the excitation ordering. Based on these results, we describe a
communication scheme which requires little effort for preparation.
|
[{'version': 'v1', 'created': 'Tue, 17 Jan 2012 17:59:25 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Feb 2012 17:13:03 GMT'}
{'version': 'v3', 'created': 'Sun, 20 May 2012 19:13:52 GMT'}
{'version': 'v4', 'created': 'Tue, 28 Aug 2012 01:36:10 GMT'}]
|
2015-06-03
|
[array(['Wang', 'Zhao-Ming', ''], dtype=object)
array(['Ma', 'Rui-Song', ''], dtype=object)
array(['Bishop', 'C. Allen', ''], dtype=object)
array(['Gu', 'Yong-Jian', ''], dtype=object)]
|
4,599 |
2209.07262
|
Philipp Werner
|
Philipp Werner, Francesco Petocchi, Martin Eckstein
|
Time-resolved photoemission and RIXS study of a site-selective Mott
insulator
| null | null |
10.1103/PhysRevB.107.035157
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inspired by the physics of rare earth nickelates, we study the photoemission
(PES) and resonant inelastic X-ray scattering (RIXS) spectra of a correlated
electron system with two types of insulating sublattices. Sublattice A is
characterized by a hybridization gap and a low-spin state, while sublattice B
features a Mott gap and a local magnetic moment. We show how the coupling of
these two qualitatively different insulating states affects the dynamics of
photo-induced charge carriers and how the nonequilibrium states manifest
themselves in the PES and RIXS signals. In particular, we find that charge
carriers created on the B sublattice migrate to the A sublattice, where they
contribute to the creation of in-gap states in the PES signal, and to
characteristic peaks in the nonequilibrium RIXS spectrum. While the
contributions from the two sublattices cannot be easily distinguished in the
local photoemission spectrum, the weights of the RIXS signals in the
two-dimensional $\omega_\text{in}$-$\omega_\text{out}$ space provide
information on the local state evolution on both sublattices.
|
[{'version': 'v1', 'created': 'Thu, 15 Sep 2022 12:55:08 GMT'}]
|
2023-02-15
|
[array(['Werner', 'Philipp', ''], dtype=object)
array(['Petocchi', 'Francesco', ''], dtype=object)
array(['Eckstein', 'Martin', ''], dtype=object)]
|
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