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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1,800 |
1604.06992
|
Qingying Xue
|
Mingming Cao and Qingying Xue
|
A Revisit on Commutators of linear and bilinear Fractional Integral
Operator
|
17 pages
| null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $I_{\alpha}$ be the linear and $\mathcal{I}_{\alpha}$ be the bilinear
fractional integral operators. In the linear setting, it is known that the
two-weight inequality holds for the first order commutators of $I_{\alpha}$.
But the method can't be used to obtain the two weighted norm inequality for the
higher order commutators of $I_{\alpha}$. In this paper, we first give an
alternative proof for the first order commutators of $I_{\alpha}$. This new
approach allows us to consider the higher order commutators. This was done by
showing that the commutator $[b,I_{\alpha}]$ can be represented as a finite
linear combination of some paraproducts. Then, by using the Cauchy integral
theorem, we show that the two-weight inequality holds for the higher order
commutators of $I_{\alpha}$. In the bilinear setting, we present a dyadic proof
for the characterization between $BMO$ and the boundedness of
$[b,\mathcal{I}_{\alpha}]$. Moreover, some bilinear paraproducts are also
treated in order to obtain the boundedness of $[b,\mathcal{I}_{\alpha}]$.
|
[{'version': 'v1', 'created': 'Sun, 24 Apr 2016 06:57:04 GMT'}]
|
2016-04-26
|
[array(['Cao', 'Mingming', ''], dtype=object)
array(['Xue', 'Qingying', ''], dtype=object)]
|
1,801 |
0902.2754
|
Erasmo Caponio
|
Rossella Bartolo, Anna Maria Candela, Erasmo Caponio
|
Normal geodesics connecting two non-necessarily spacelike submanifolds
in a stationary spacetime
|
Minor revision; 16 pages
|
Adv. Nonlinear Stud., 10 (2010) 851--866
| null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we obtain an existence theorem for normal geodesics joining two
given submanifolds in a globally hyperbolic stationary spacetime. The proof is
based on both variational and geometric arguments involving the causal
structure of the spacetime, the completeness of suitable Finsler metrics
associated to it and some basic properties of a submersion. By this
interaction, unlike previous results on the topic, also non--spacelike
submanifolds can be handled.
|
[{'version': 'v1', 'created': 'Mon, 16 Feb 2009 18:19:42 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Sep 2009 16:29:31 GMT'}
{'version': 'v3', 'created': 'Mon, 6 Sep 2010 23:46:10 GMT'}]
|
2011-01-12
|
[array(['Bartolo', 'Rossella', ''], dtype=object)
array(['Candela', 'Anna Maria', ''], dtype=object)
array(['Caponio', 'Erasmo', ''], dtype=object)]
|
1,802 |
2204.12723
|
Haitian Xie
|
Haitian Xie, Ying Zhu, Denis Shishkin
|
Information-theoretic limitations of data-based price discrimination
| null | null | null | null |
cs.GT cs.IT cs.LG econ.EM econ.TH math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper studies third-degree price discrimination (3PD) based on a random
sample of valuation and covariate data, where the covariate is continuous, and
the distribution of the data is unknown to the seller. The main results of this
paper are twofold. The first set of results is pricing strategy independent and
reveals the fundamental information-theoretic limitation of any data-based
pricing strategy in revenue generation for two cases: 3PD and uniform pricing.
The second set of results proposes the $K$-markets empirical revenue
maximization (ERM) strategy and shows that the $K$-markets ERM and the uniform
ERM strategies achieve the optimal rate of convergence in revenue to that
generated by their respective true-distribution 3PD and uniform pricing optima.
Our theoretical and numerical results suggest that the uniform (i.e.,
$1$-market) ERM strategy generates a larger revenue than the $K$-markets ERM
strategy when the sample size is small enough, and vice versa.
|
[{'version': 'v1', 'created': 'Wed, 27 Apr 2022 06:33:37 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Feb 2023 06:08:17 GMT'}
{'version': 'v3', 'created': 'Thu, 30 Mar 2023 04:17:27 GMT'}]
|
2023-03-31
|
[array(['Xie', 'Haitian', ''], dtype=object)
array(['Zhu', 'Ying', ''], dtype=object)
array(['Shishkin', 'Denis', ''], dtype=object)]
|
1,803 |
1708.03724
|
Artem Chernikov
|
Artem Chernikov and Nadja Hempel
|
Mekler's construction and generalized stability
|
v.2 many minor corrections and presentation improvements throughout
the article, more details were added in some of the proofs; Remarks 2.12,
2.13 and Problem 5.8 are new; accepted to the Israel Journal of Mathematics
| null | null | null |
math.LO math.CO math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Mekler's construction gives an interpretation of any structure in a finite
relational language in a group (nilpotent of class $2$ and exponent $p>2$, but
not finitely generated in general). Even though this construction is not a
bi-interpretation, it is known to preserve some model-theoretic tameness
properties of the original structure including stability and simplicity. We
demonstrate that $k$-dependence of the theory is preserved, for all $k \in
\mathbb{N}$, and that NTP$_2$ is preserved. We apply this result to obtain
first examples of strictly $k$-dependent groups (with no additional structure).
|
[{'version': 'v1', 'created': 'Fri, 11 Aug 2017 22:48:56 GMT'}
{'version': 'v2', 'created': 'Sun, 8 Jul 2018 23:00:46 GMT'}]
|
2018-07-10
|
[array(['Chernikov', 'Artem', ''], dtype=object)
array(['Hempel', 'Nadja', ''], dtype=object)]
|
1,804 |
2209.07925
|
Benjamin Gr\'evin
|
Alo\"is Arrighi, Nathan Ullberg, Vincent Derycke, Benjamin Gr\'evin
|
A simple KPFM-based approach for electrostatic-free topographic
measurements: the case of MoS$_2$ on SiO$_2$
| null | null |
10.1088/1361-6528/acbe02
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A simple implementation of Kelvin probe force microscopy is reported that
enables recording topographic images in the absence of any component of the
electrostatic force. Our approach is based on a close loop z-spectroscopy
operated in data cube mode. Curves of the tip-sample distance as a function of
time are recorded onto a 2D grid. A dedicated circuit holds the KPFM
compensation bias and subsequently cut off the modulation voltage during
well-defined time-windows within the spectroscopic acquisition. Topographic
images are recalculated from the matrix of spectroscopic curves. This approach
is applied to the case of transition metal dichalcogenides (TMD) monolayers
grown by chemical vapour deposition on silicon oxide substrates. In addition,
we check to what extent a proper stacking height estimation can also be
performed by recording series of images for decreasing values of the bias
modulation amplitude. The outputs of both approaches are shown to be fully
consistent. The results exemplify how in the operating conditions of
non-contact AFM under ultra-high vacuum, the stacking height values can
dramatically be overestimated due to variations in the tip-surface capacitive
gradient, even though the KPFM controller nullifies the potential difference.
We show that the number of atomic layers of a TMD can be safely assessed, only
if the KPFM measurement is performed with a modulated bias amplitude reduced at
its strict minimum or, even better, without any modulated bias. Last, the
spectroscopic data reveal that defects at the TMD/oxide interface can have a
counterintuitive impact on the electrostatic landscape, resulting in an
apparent decrease of the measured stacking height by conventional nc-AFM/KPFM
compared to non-defective sample areas. Hence, electrostatic free z-imaging
proves to be a promising tool to assess the existence of defects in atomically
thin TMD layers grown on oxides
|
[{'version': 'v1', 'created': 'Fri, 16 Sep 2022 13:38:57 GMT'}]
|
2023-03-22
|
[array(['Arrighi', 'Aloïs', ''], dtype=object)
array(['Ullberg', 'Nathan', ''], dtype=object)
array(['Derycke', 'Vincent', ''], dtype=object)
array(['Grévin', 'Benjamin', ''], dtype=object)]
|
1,805 |
quant-ph/0501018
|
Buttiker
|
M. Buttiker, A. N. Jordan
|
Ground State Entanglement Energetics
|
10 pages, 6 figures
|
Physica E 29, 272 (2005)
|
10.1016/j.physe.2005.05.024
| null |
quant-ph cond-mat.mes-hall
| null |
We consider the ground state of simple quantum systems coupled to an
environment. In general the system is entangled with its environment. As a
consequence, even at zero temperature, the energy of the system is not sharp: a
projective measurement can find the system in an excited state. We show that
energy fluctuation measurements at zero temperature provide entanglement
information. For two-state systems which exhibit a persistent current in the
ground state, energy fluctuations and persistent current fluctuations are
closely related. The harmonic oscillator serves to illustrate energy
fluctuations in a system with an infinite number of states. In addition to the
energy distribution we discuss the energy-energy time-correlation function in
the zero-temperature limit.
|
[{'version': 'v1', 'created': 'Tue, 4 Jan 2005 14:50:01 GMT'}]
|
2007-05-23
|
[array(['Buttiker', 'M.', ''], dtype=object)
array(['Jordan', 'A. N.', ''], dtype=object)]
|
1,806 |
1610.10029
|
Bernhard Meister
|
Bernhard K. Meister
|
Meta-CTA Trading Strategies based on the Kelly Criterion
|
12 pages
| null | null | null |
q-fin.PM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The influence of Commodity Trading Advisors (CTA) on the price process is
explored with the help of a simple model. CTA managers are taken to be Kelly
optimisers, which invest a fixed proportion of their assets in the risky asset
and the remainder in a riskless asset. This requires regular adjustment of the
portfolio weights as prices evolve. The CTA trading activity impacts the price
change in the form of a power law. These two rules governing investment ratios
and price impact are combined and lead through updating at fixed time intervals
to a deterministic price dynamic. For different choices of the model parameters
one gets qualitatively different dynamics. The result can be expressed as a
phase diagram. Meta-CTA strategies can be devised to exploit the predictability
inherent in the model dynamics by avoiding critical areas of the phase diagram
or by taking a contrarian position at an opportune time.
|
[{'version': 'v1', 'created': 'Mon, 31 Oct 2016 17:32:37 GMT'}]
|
2016-11-01
|
[array(['Meister', 'Bernhard K.', ''], dtype=object)]
|
1,807 |
1712.01228
|
James Nguyen
|
James Nguyen, Nicholas J. Teh, and Laura Wells
|
Why surplus structure is not superfluous
| null | null | null | null |
physics.hist-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The idea that gauge theory has 'surplus' structure poses a puzzle: in one
much discussed sense, this structure is redundant; but on the other hand, it is
also widely held to play an essential role in the theory. In this paper, we
employ category-theoretic tools to illuminate an aspect of this puzzle. We
precisify what is meant by 'surplus' structure by means of functorial
comparisons with equivalence classes of gauge fields, and then show that such
structure is essential for any theory that represents a rich collection of
physically relevant fields which are 'local' in nature.
|
[{'version': 'v1', 'created': 'Mon, 4 Dec 2017 18:09:47 GMT'}]
|
2017-12-05
|
[array(['Nguyen', 'James', ''], dtype=object)
array(['Teh', 'Nicholas J.', ''], dtype=object)
array(['Wells', 'Laura', ''], dtype=object)]
|
1,808 |
cond-mat/0607194
|
Emmanuel Clouet
|
Emmanuel Clouet (SRMP)
|
The vacancy - edge dislocation interaction in fcc metals: a comparison
between atomic simulations and elasticity theory
| null |
Acta Materialia 54 (2006) 3543-3552
|
10.1016/j.actamat.2006.03.043
| null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
The interaction between vacancies and edge dislocations in face centered
cubic metals (Al, Au, Cu, Ni) is studied at different length scales. Using
empirical potentials and static relaxation, atomic simulations give us a
precise description of this interaction, mostly in the case when the separation
distance between both defects is small. At larger distances, elasticity theory
can be used to predict this interaction. From the comparison between both
approaches we obtain the minimal separation distance where elasticity applies
and we estimate the degree of refinement required in the calculation. In this
purpose, isotropic and anisotropic elasticity is used assuming a perfect or a
dissociated edge dislocation and considering the size effect as well as the
inhomogeneity interaction.
|
[{'version': 'v1', 'created': 'Fri, 7 Jul 2006 12:17:53 GMT'}
{'version': 'v2', 'created': 'Mon, 11 Jan 2021 09:41:12 GMT'}]
|
2021-01-12
|
[array(['Clouet', 'Emmanuel', '', 'SRMP'], dtype=object)]
|
1,809 |
1708.07465
|
Leonardo A. dos Santos
|
Leonardo A. dos Santos, Jorge Mel\'endez, Megan Bedell, Jacob L. Bean,
Lorenzo Spina, Alan Alves-Brito, Stefan Dreizler, Iv\'an Ram\'irez, Martin
Asplund
|
Spectroscopic binaries in the Solar Twin Planet Search program: from
substellar-mass to M dwarf companions
|
13 pages, 7 figures, accepted for publication in MNRAS
| null |
10.1093/mnras/stx2199
| null |
astro-ph.SR astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Previous studies on the rotation of Sun-like stars revealed that the
rotational rates of young stars converge towards a well-defined evolution that
follows a power-law decay. It seems, however, that some binary stars do not
obey this relation, often by displaying enhanced rotational rates and activity.
In the Solar Twin Planet Search program we observed several solar twin
binaries, and found a multiplicity fraction of $42\% \pm 6\%$ in the whole
sample; moreover, at least three of these binaries (HIP 19911, HIP 67620 and
HIP 103983) clearly exhibit the aforementioned anomalies. We investigated the
configuration of the binaries in the program, and discovered new companions for
HIP 6407, HIP 54582, HIP 62039 and HIP 30037, of which the latter is orbited by
a $0.06$ M$_\odot$ brown dwarf in a 1-month long orbit. We report the orbital
parameters of the systems with well-sampled orbits and, in addition, the lower
limits of parameters for the companions that only display a curvature in their
radial velocities. For the linear trend binaries, we report an estimate of the
masses of their companions when their observed separation is available, and a
minimum mass otherwise. We conclude that solar twin binaries with low-mass
stellar companions at moderate orbital periods do not display signs of a
distinct rotational evolution when compared to single stars. We confirm that
the three peculiar stars are double-lined binaries, and that their companions
are polluting their spectra, which explains the observed anomalies.
|
[{'version': 'v1', 'created': 'Thu, 24 Aug 2017 15:46:14 GMT'}]
|
2017-08-25
|
[array(['Santos', 'Leonardo A. dos', ''], dtype=object)
array(['Meléndez', 'Jorge', ''], dtype=object)
array(['Bedell', 'Megan', ''], dtype=object)
array(['Bean', 'Jacob L.', ''], dtype=object)
array(['Spina', 'Lorenzo', ''], dtype=object)
array(['Alves-Brito', 'Alan', ''], dtype=object)
array(['Dreizler', 'Stefan', ''], dtype=object)
array(['Ramírez', 'Iván', ''], dtype=object)
array(['Asplund', 'Martin', ''], dtype=object)]
|
1,810 |
1811.00391
|
Michelle B\"ock
|
Michelle B\"ock, Kjell Eriksson, Anders Forsgren
|
On the Interplay between Robustness and Dynamic Planning for Adaptive
Radiation Therapy
| null |
Biomedical Physics & Engineering Express 2019
|
10.1088/2057-1976/ab1bfc
| null |
physics.med-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Interfractional geometric uncertainties can lead to deviations of the actual
delivered dose from the prescribed dose distribution. To better handle these
uncertainties during treatment, the authors propose a dynamic framework for
robust adaptive radiation therapy in which a variety of robust adaptive
treatment strategies are introduced and evaluated. This variety is a result of
optimization variables with various degrees of freedom within robust
optimization models that vary in their grade of conservativeness. We formulate
an adaptive framework with dependence on time and/or uncertainty or neither.
The framework is evaluated with either expected-value-, worst-case-, or
conditional-value-at-risk-(CVaR)-optimization. The goal of this study is to
identify the mathematical properties of the proposed robust adaptive strategies
in order to restore the planned dose distribution. We apply a result from
convex analysis to show that in our framework, the time-dependent problem has a
time-independent optimal solution. This implies that the time-dependent problem
can be solved by dynamically solving the corresponding time-independent
problem. This is especially relevant in a clinical context, since it implies
that adaptive radiation therapy can be implemented in clinical practice using
commercially available treatment planning systems. We demonstrate that
time-and-scenario-dependent variables are most compatible with
worst-case-optimization and that including dose prediction potentially improves
treatment compared to non-adaptive planning. Contrarily,
time-and-scenario-independent variables appear most compatible with
expected-value-optimization. Non-adaptive robust strategies may provide
sufficient target coverage, comparable to robust adaptive strategies, if the
occurring uncertainties follow the same distribution as those included in the
robust model.
|
[{'version': 'v1', 'created': 'Thu, 1 Nov 2018 14:01:52 GMT'}]
|
2019-05-16
|
[array(['Böck', 'Michelle', ''], dtype=object)
array(['Eriksson', 'Kjell', ''], dtype=object)
array(['Forsgren', 'Anders', ''], dtype=object)]
|
1,811 |
2012.08682
|
Eray Unsal Atay
|
Eray Unsal Atay, Igor Kadota and Eytan Modiano
|
Aging Bandits: Regret Analysis and Order-Optimal Learning Algorithm for
Wireless Networks with Stochastic Arrivals
| null | null | null | null |
eess.SY cs.IT cs.LG cs.SY math.IT stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a single-hop wireless network with sources transmitting
time-sensitive information to the destination over multiple unreliable
channels. Packets from each source are generated according to a stochastic
process with known statistics and the state of each wireless channel (ON/OFF)
varies according to a stochastic process with unknown statistics. The
reliability of the wireless channels is to be learned through observation. At
every time slot, the learning algorithm selects a single pair (source, channel)
and the selected source attempts to transmit its packet via the selected
channel. The probability of a successful transmission to the destination
depends on the reliability of the selected channel. The goal of the learning
algorithm is to minimize the Age-of-Information (AoI) in the network over $T$
time slots. To analyze the performance of the learning algorithm, we introduce
the notion of AoI regret, which is the difference between the expected
cumulative AoI of the learning algorithm under consideration and the expected
cumulative AoI of a genie algorithm that knows the reliability of the channels
a priori. The AoI regret captures the penalty incurred by having to learn the
statistics of the channels over the $T$ time slots. The results are two-fold:
first, we consider learning algorithms that employ well-known solutions to the
stochastic multi-armed bandit problem (such as $\epsilon$-Greedy, Upper
Confidence Bound, and Thompson Sampling) and show that their AoI regret scales
as $\Theta(\log T)$; second, we develop a novel learning algorithm and show
that it has $O(1)$ regret. To the best of our knowledge, this is the first
learning algorithm with bounded AoI regret.
|
[{'version': 'v1', 'created': 'Wed, 16 Dec 2020 00:58:26 GMT'}
{'version': 'v2', 'created': 'Mon, 21 Dec 2020 20:03:47 GMT'}]
|
2020-12-23
|
[array(['Atay', 'Eray Unsal', ''], dtype=object)
array(['Kadota', 'Igor', ''], dtype=object)
array(['Modiano', 'Eytan', ''], dtype=object)]
|
1,812 |
1409.4618
|
Immanuel Anjam
|
Immanuel Anjam, Jan Valdman
|
Fast MATLAB assembly of FEM matrices in 2D and 3D: Edge elements
|
12 pages, 5 figures, ESCO 2014 conference
| null |
10.1016/j.amc.2015.03.105
| null |
cs.MS math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose an effective and flexible way to assemble finite element stiffness
and mass matrices in MATLAB. We apply this for problems discretized by edge
finite elements. Typical edge finite elements are Raviart-Thomas elements used
in discretizations of H(div) spaces and Nedelec elements in discretizations of
H(curl) spaces. We explain vectorization ideas and comment on a freely
available MATLAB code which is fast and scalable with respect to time.
|
[{'version': 'v1', 'created': 'Tue, 16 Sep 2014 13:08:47 GMT'}
{'version': 'v2', 'created': 'Mon, 11 May 2015 13:19:00 GMT'}]
|
2015-05-12
|
[array(['Anjam', 'Immanuel', ''], dtype=object)
array(['Valdman', 'Jan', ''], dtype=object)]
|
1,813 |
hep-ph/0601144
|
Valery Lyubovitskij
|
Claudio Dib, Amand Faessler, Thomas Gutsche, Sergey Kovalenko, Jan
Kuckei, Valery E. Lyubovitskij, Kem Pumsa-ard
|
The neutron electric dipole form factor in the perturbative chiral quark
model
|
20 pages, 3 figures
|
J.Phys.G32:547-564,2006
|
10.1088/0954-3899/32/4/011
| null |
hep-ph
| null |
We calculate the electric dipole form factor of the neutron in a perturbative
chiral quark model, parameterizing CP-violation of generic origin by means of
effective electric dipole moments of the constituent quarks and their
CP-violating couplings to the chiral fields. We discuss the relation of these
effective parameters to more fundamental ones such as the intrinsic electric
and chromoelectric dipole moments of quarks and the Weinberg parameter. From
the existing experimental upper limits on the neutron EDM we derive constraints
on these CP-violating parameters.
|
[{'version': 'v1', 'created': 'Wed, 18 Jan 2006 08:13:17 GMT'}]
|
2008-11-26
|
[array(['Dib', 'Claudio', ''], dtype=object)
array(['Faessler', 'Amand', ''], dtype=object)
array(['Gutsche', 'Thomas', ''], dtype=object)
array(['Kovalenko', 'Sergey', ''], dtype=object)
array(['Kuckei', 'Jan', ''], dtype=object)
array(['Lyubovitskij', 'Valery E.', ''], dtype=object)
array(['Pumsa-ard', 'Kem', ''], dtype=object)]
|
1,814 |
1703.05863
|
Matias Korman
|
Oswin Aichholzer, Thomas Hackl, Matias Korman, Alexander Pilz,
G\"unter Rote, Andr\'e van Renssen, Marcel Roeloffzen, Birgit Vogtenhuber
|
Packing Short Plane Spanning Graphs in Complete Geometric Graphs
|
Preliminary version appeared in the proceedings of the 27th
International Symposium on Algorithms and Computation (ISAAC 2016), Leibniz
International Proceedings in Informatics (LIPIcs), Vol. 64, pp. 9:1-9:12
| null |
10.4230/LIPIcs.ISAAC.2016.9
| null |
cs.CG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given a set of points in the plane, we want to establish a connection network
between these points that consists of several disjoint layers. Motivated by
sensor networks, we want that each layer is spanning and plane, and that no
edge is very long (when compared to the minimum length needed to obtain a
spanning graph).
We consider two different approaches: first we show an almost optimal
centralized approach to extract two graphs. Then we show a constant factor
approximation for a distributed model in which each point can compute its
adjacencies using only local information. In both cases the obtained layers are
plane
|
[{'version': 'v1', 'created': 'Fri, 17 Mar 2017 01:31:12 GMT'}
{'version': 'v2', 'created': 'Tue, 18 Apr 2017 13:40:47 GMT'}
{'version': 'v3', 'created': 'Thu, 4 Apr 2019 04:44:03 GMT'}]
|
2019-04-05
|
[array(['Aichholzer', 'Oswin', ''], dtype=object)
array(['Hackl', 'Thomas', ''], dtype=object)
array(['Korman', 'Matias', ''], dtype=object)
array(['Pilz', 'Alexander', ''], dtype=object)
array(['Rote', 'Günter', ''], dtype=object)
array(['van Renssen', 'André', ''], dtype=object)
array(['Roeloffzen', 'Marcel', ''], dtype=object)
array(['Vogtenhuber', 'Birgit', ''], dtype=object)]
|
1,815 |
1809.06381
|
Christopher R. Burns
|
Christopher. R. Burns, Emilie Parent, M. M. Phillips, Maximillian
Stritzinger, Kevin Krisciunas, Nicholas B. Suntzeff, Eric Y. Hsiao, Carlos
Contreras, Jorge Anais, Luis Boldt, Luis Busta, Abdo Campillay, Sergio
Castellon, Gaston Folatelli, Wendy L. Freedman, Consuelo Gonzalez, Mario
Hamuy, Peter Heoflich, Wojtek Krzeminski, Barry F. Madore, Nidia Morrell, S.
E. Persson, Miguel Roth, Francisco Salgado, Jacqueline Seron, Simon Torres
|
The Carnegie Supernova Project: Absolute Calibration and the Hubble
Constant
|
Version 2: fixed author list. Originally submitted to ApJ Aug 30,
2018. Re-submitted Sept 12, 2018 following referee's report. 28 pages, 12
figures, 11 tables
| null |
10.3847/1538-4357/aae51c
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an analysis of the final data release of the Carnegie Supernova
Project I, focusing on the absolute calibration of the luminosity-decline-rate
relation for Type Ia supernovae (SNeIa) using new intrinsic color relations
with respect to the color-stretch parameter, $s_{BV}$, enabling improved dust
extinction corrections. We investigate to what degree the so-called
fast-declining SNeIa can be used to determine accurate extragalactic distances.
We estimate the intrinsic scatter in the luminosity-decline-rate relation, and
find it ranges from $\pm 0.13$ mag to $\pm 0.18$ mag with no obvious dependence
on wavelength. Using the Cepheid variable star data from the SH0ES project
(Riess et al., 2016), the SNIa distance scale is calibrated and the Hubble
constant is estimated using our optical and near-infrared sample, and these
results are compared to those determined exclusively from a near-infrared
sub-sample. The systematic effect of the supernova's host galaxy mass is
investigated as a function of wavelength and is found to decrease toward redder
wavelengths, suggesting this effect may be due to dust properties of the host.
Using estimates of the dust extinction derived from optical and NIR
wavelengths, and applying these to H band, we derive a Hubble constant $H_0 =
73.2 \pm 2.3$ km/s/Mpc, whereas using a simple $B-V$ color-correction applied
to B band yields $H_0 = 72.7 \pm 2.1$ km/s/Mpc. Photometry of two calibrating
SNeIa from the CSP-II sample, SN2012ht and SN2015F, is presented and used to
improve the calibration of the SNIa distance ladder.
|
[{'version': 'v1', 'created': 'Mon, 17 Sep 2018 18:00:07 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Sep 2018 15:30:07 GMT'}]
|
2018-12-19
|
[array(['Burns', 'Christopher. R.', ''], dtype=object)
array(['Parent', 'Emilie', ''], dtype=object)
array(['Phillips', 'M. M.', ''], dtype=object)
array(['Stritzinger', 'Maximillian', ''], dtype=object)
array(['Krisciunas', 'Kevin', ''], dtype=object)
array(['Suntzeff', 'Nicholas B.', ''], dtype=object)
array(['Hsiao', 'Eric Y.', ''], dtype=object)
array(['Contreras', 'Carlos', ''], dtype=object)
array(['Anais', 'Jorge', ''], dtype=object)
array(['Boldt', 'Luis', ''], dtype=object)
array(['Busta', 'Luis', ''], dtype=object)
array(['Campillay', 'Abdo', ''], dtype=object)
array(['Castellon', 'Sergio', ''], dtype=object)
array(['Folatelli', 'Gaston', ''], dtype=object)
array(['Freedman', 'Wendy L.', ''], dtype=object)
array(['Gonzalez', 'Consuelo', ''], dtype=object)
array(['Hamuy', 'Mario', ''], dtype=object)
array(['Heoflich', 'Peter', ''], dtype=object)
array(['Krzeminski', 'Wojtek', ''], dtype=object)
array(['Madore', 'Barry F.', ''], dtype=object)
array(['Morrell', 'Nidia', ''], dtype=object)
array(['Persson', 'S. E.', ''], dtype=object)
array(['Roth', 'Miguel', ''], dtype=object)
array(['Salgado', 'Francisco', ''], dtype=object)
array(['Seron', 'Jacqueline', ''], dtype=object)
array(['Torres', 'Simon', ''], dtype=object)]
|
1,816 |
1603.03646
|
Rohini Giles
|
Rohini S. Giles and Leigh N. Fletcher and Patrick G. J. Irwin and
Henrik Melin and Tom S. Stallard
|
Detection of H3+ auroral emission in Jupiter's 5-micron window
|
5 pages, 3 figures, accepted in A&A
|
A&A 589, A67 (2016)
|
10.1051/0004-6361/201628170
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use high-resolution ground-based observations from the VLT CRIRES
instrument in December 2012 to identify sixteen previously undetected H3+
emission lines from Jupiter's ionosphere. These emission lines are located in
Jupiter's 5-micron window (4.5-5.2 {\mu}m), an optically-thin region of the
planet's spectrum where the radiation mostly originates from the deep
troposphere. The H3+ emission lines are so strong that they are visible even
against this bright background. We measure the Doppler broadening of the H3+
emission lines in order to evaluate the kinetic temperature of the molecules,
and we obtain a value of 1390$\pm$160 K. We also measure the relative
intensities of lines in the {\nu}2 fundamental in order to calculate the
rotational temperature, obtaining a value of 960$\pm$40 K. Finally, we use the
detection of an emission line from the 2{\nu}2(2)-{\nu}2 overtone to measure a
vibrational temperature of 925$\pm$25 K. We use these three independent
temperature estimates to discuss the thermodynamic equilibrium of Jupiter's
ionosphere.
|
[{'version': 'v1', 'created': 'Fri, 11 Mar 2016 14:35:34 GMT'}]
|
2016-04-20
|
[array(['Giles', 'Rohini S.', ''], dtype=object)
array(['Fletcher', 'Leigh N.', ''], dtype=object)
array(['Irwin', 'Patrick G. J.', ''], dtype=object)
array(['Melin', 'Henrik', ''], dtype=object)
array(['Stallard', 'Tom S.', ''], dtype=object)]
|
1,817 |
1605.02261
|
Andrzej Roslanowski
|
Andrzej Roslanowski and Saharon Shelah
|
Small-large subgroups of the reals
| null | null | null |
Shelah [RoSh:1081]
|
math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We are interested in subgroups of the reals that are small in one and large
in another sense. We prove that, in ZFC, there exists a non-meager Lebesgue
null subgrooup of R, while it isconsistent there there is no non-null meager
subgroup of R.
|
[{'version': 'v1', 'created': 'Sun, 8 May 2016 02:14:29 GMT'}
{'version': 'v2', 'created': 'Tue, 31 May 2016 03:21:47 GMT'}]
|
2016-06-01
|
[array(['Roslanowski', 'Andrzej', ''], dtype=object)
array(['Shelah', 'Saharon', ''], dtype=object)]
|
1,818 |
1302.1961
|
Michel Destrade
|
Moniba Shams, Michel Destrade, Ray W. Ogden
|
Initial stresses in elastic solids: Constitutive laws and
acoustoelasticity
|
23 pages
|
Wave Motion, 48 (2011) 552-567
|
10.1016/j.wavemoti.2011.04.004
| null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
On the basis of the nonlinear theory of elasticity, the general constitutive
equation for an isotropic hyperelastic solid in the presence of initial stress
is derived. This derivation involves invariants that couple the deformation
with the initial stress and in general, for a compressible material, it
requires 10 invariants, reducing to 9 for an incompressible material.
Expressions for the Cauchy and nominal stress tensors in a finitely deformed
configuration are given along with the elasticity tensor and its specialization
to the initially stressed undeformed configuration. The equations governing
infinitesimal motions superimposed on a finite deformation are then used to
study the combined effects of initial stress and finite deformation on the
propagation of homogeneous plane waves in a homogeneously deformed and
initially stressed solid of infinite extent. This general framework allows for
various different specializations, which make contact with earlier works. In
particular, connections with results derived within Biot's classical theory are
highlighted. The general results are also specialized to the case of a small
initial stress and a small pre-deformation, i.e. to the evaluation of the
acoustoelastic effect. Here the formulas derived for the wave speeds cover the
case of a second-order elastic solid without initial stress and subject to a
uniaxial tension [Hughes and Kelly, Phys. Rev. 92 (1953) 1145] and are
consistent with results for an undeformed solid subject to a residual stress
[Man and Lu, J. Elasticity 17 (1987) 159]. These formulas provide a basis for
acoustic evaluation of the second- and third-order elasticity constants and of
the residual stresses. The results are further illustrated in respect of a
prototype model of nonlinear elasticity with initial stress, allowing for both
finite deformation and nonlinear dependence on the initial stress.
|
[{'version': 'v1', 'created': 'Fri, 8 Feb 2013 07:49:55 GMT'}]
|
2013-02-11
|
[array(['Shams', 'Moniba', ''], dtype=object)
array(['Destrade', 'Michel', ''], dtype=object)
array(['Ogden', 'Ray W.', ''], dtype=object)]
|
1,819 |
2303.11516
|
Fulin Liu
|
Fulin Liu, Yinlin Hu, Mathieu Salzmann
|
Linear-Covariance Loss for End-to-End Learning of 6D Pose Estimation
| null | null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Most modern image-based 6D object pose estimation methods learn to predict
2D-3D correspondences, from which the pose can be obtained using a PnP solver.
Because of the non-differentiable nature of common PnP solvers, these methods
are supervised via the individual correspondences. To address this, several
methods have designed differentiable PnP strategies, thus imposing supervision
on the pose obtained after the PnP step. Here, we argue that this conflicts
with the averaging nature of the PnP problem, leading to gradients that may
encourage the network to degrade the accuracy of individual correspondences. To
address this, we derive a loss function that exploits the ground truth pose
before solving the PnP problem. Specifically, we linearize the PnP solver
around the ground-truth pose and compute the covariance of the resulting pose
distribution. We then define our loss based on the diagonal covariance
elements, which entails considering the final pose estimate yet not suffering
from the PnP averaging issue. Our experiments show that our loss consistently
improves the pose estimation accuracy for both dense and sparse correspondence
based methods, achieving state-of-the-art results on both Linemod-Occluded and
YCB-Video.
|
[{'version': 'v1', 'created': 'Tue, 21 Mar 2023 00:32:31 GMT'}]
|
2023-03-22
|
[array(['Liu', 'Fulin', ''], dtype=object)
array(['Hu', 'Yinlin', ''], dtype=object)
array(['Salzmann', 'Mathieu', ''], dtype=object)]
|
1,820 |
1104.4541
|
Axel Brandenburg
|
P. J. K\"apyl\"a (1,2), A. Brandenburg (2,3), N. Kleeorin (4), M. J.
Mantere (1), I. Rogachevskii (4) ((1) University of Helsinki, (2) NORDITA,
(3) University of Stockholm, (4) Ben-Gurion University)
|
Negative effective magnetic pressure in turbulent convection
|
10 pages, 11 figures, MNRAS, published version
|
Monthly Notices Roy. Astron. Soc. 422, 2465-2473 (2012)
|
10.1111/j.1365-2966.2012.20801.x
|
NORDITA-2011-36
|
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the effects of weakly and strongly stratified turbulent
convection on the mean effective Lorentz force, and especially on the mean
effective magnetic pressure. Earlier studies with isotropically forced
non-stratified and stratified turbulence have shown that the contribution of
the turbulence to the mean magnetic pressure is negative for mean horizontal
magnetic fields that are smaller than the equipartition strength, so that the
effective mean magnetic pressure that takes into account the turbulence
effects, can be negative. Compared with earlier cases of forced turbulence with
an isothermal equation of state, we find that the turbulence effect is similar
to or even stronger in the present case of turbulent convection. This is argued
to be due to the anisotropy of turbulence in the vertical direction. Another
important difference compared with earlier studies is the presence of an
evolution equation for the specific entropy. Mean-field modelling with entropy
evolution indicates that the negative effective magnetic pressure can still
lead to a large-scale instability which forms local flux concentrations, even
though the specific entropy evolution tends to have a stabilizing effect when
applied to a stably stratified (e.g., isothermal) layer. It is argued that this
large-scale instability could be important for the formation of solar
large-scale magnetic structures such as active regions.
|
[{'version': 'v1', 'created': 'Sat, 23 Apr 2011 09:10:37 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Feb 2012 20:59:19 GMT'}
{'version': 'v3', 'created': 'Mon, 14 May 2012 06:34:21 GMT'}]
|
2012-05-15
|
[array(['Käpylä', 'P. J.', ''], dtype=object)
array(['Brandenburg', 'A.', ''], dtype=object)
array(['Kleeorin', 'N.', ''], dtype=object)
array(['Mantere', 'M. J.', ''], dtype=object)
array(['Rogachevskii', 'I.', ''], dtype=object)]
|
1,821 |
2108.13840
|
Weisheng Wu
|
Weisheng Wu
|
On the continuity of topological entropy of certain partially hyperbolic
diffeomorphisms
| null | null |
10.1088/1361-6544/ac636f
| null |
math.DS
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper, we consider certain partially hyperbolic diffeomorphisms with
center of arbitrary dimension and obtain continuity properties of the
topological entropy under $C^1$ perturbations. The systems considered have
subexponential growth in the center direction and uniform exponential growth
along the unstable foliation. Our result applies to partially hyperbolic
diffeomorphisms which are Lyapunov stable in the center direction. It applies
to another important class of systems which do have subexponential growth in
the center direction, for which we develop a technique to use exponential
mixing property of the systems to get uniform distribution of unstable
manifolds. A primary example is the translations on homogenous spaces which may
have center of arbitrary dimension and of polynomial orbit growth.
|
[{'version': 'v1', 'created': 'Tue, 31 Aug 2021 13:51:20 GMT'}]
|
2022-06-22
|
[array(['Wu', 'Weisheng', ''], dtype=object)]
|
1,822 |
2103.13888
|
Pritam Ganguly
|
Pritam Ganguly, Ramesh Manna, Sundaram Thangavelu
|
On a theorem of Chernoff on rank one Riemannian symmetric spaces
|
20 pages
| null | null | null |
math.FA math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In 1975, P.R. Chernoff used iterates of the Laplacian on $\mathbb{R}^n$ to
prove an $L^2$ version of the Denjoy-Carleman theorem which provides a
sufficient condition for a smooth function on $\mathbb{R}^n$ to be
quasi-analytic. In this paper, we prove an exact analogue of Chernoff's theorem
for all rank one Riemannian symmetric spaces (of noncompact and compact types)
using iterates of the associated Laplace-Beltrami operators.
|
[{'version': 'v1', 'created': 'Thu, 25 Mar 2021 14:49:46 GMT'}]
|
2021-03-26
|
[array(['Ganguly', 'Pritam', ''], dtype=object)
array(['Manna', 'Ramesh', ''], dtype=object)
array(['Thangavelu', 'Sundaram', ''], dtype=object)]
|
1,823 |
2012.03613
|
Yihui Han
|
Yihui Han, Xiao-Ping Wang, Xiaoping Xie
|
An eXtended HDG method for Darcy-Stokes-Brinkman interface problems
|
22 pages, 31 figures
| null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper proposes an interface/boundary-unfitted eXtended hybridizable
discontinuous Galerkin (X-HDG) method for Darcy-Stokes-Brinkman interface
problems in two and three dimensions. The method uses piecewise linear
polynomials for the velocity approximation and piecewise constants for both the
velocity gradient and pressure approximations in the interior of elements
inside the subdomains separated by the interface, uses piecewise constants for
the numerical traces of velocity on the inter-element boundaries inside the
subdomains, and uses piecewise constants or linear polynomials for the
numerical traces of velocity on the interface. Optimal error estimates are
derived for the interface-unfitted X-HDG scheme. Numerical experiments are
provided to verify the theoretical results and the robustness of the proposed
method.
|
[{'version': 'v1', 'created': 'Mon, 7 Dec 2020 12:01:53 GMT'}]
|
2020-12-08
|
[array(['Han', 'Yihui', ''], dtype=object)
array(['Wang', 'Xiao-Ping', ''], dtype=object)
array(['Xie', 'Xiaoping', ''], dtype=object)]
|
1,824 |
1505.04224
|
Hammurabi Mendes
|
Hammurabi Mendes and Maurice Herlihy
|
Tight Bounds for Connectivity and Set Agreement in Byzantine Synchronous
Systems
| null | null | null | null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we show that the protocol complex of a Byzantine synchronous
system can remain $(k - 1)$-connected for up to $\lceil t/k \rceil$ rounds,
where $t$ is the maximum number of Byzantine processes, and $t \ge k \ge 1$.
This topological property implies that $\lceil t/k \rceil + 1$ rounds are
necessary to solve $k$-set agreement in Byzantine synchronous systems, compared
to $\lfloor t/k \rfloor + 1$ rounds in synchronous crash-failure systems. We
also show that our connectivity bound is tight as we indicate solutions to
Byzantine $k$-set agreement in exactly $\lceil t/k \rceil + 1$ synchronous
rounds, at least when $n$ is suitably large compared to $t$. In conclusion, we
see how Byzantine failures can potentially require one extra round to solve
$k$-set agreement, and, for $n$ suitably large compared to $t$, at most that.
|
[{'version': 'v1', 'created': 'Sat, 16 May 2015 01:04:18 GMT'}
{'version': 'v2', 'created': 'Wed, 26 Aug 2015 13:25:32 GMT'}
{'version': 'v3', 'created': 'Wed, 8 Feb 2017 20:45:37 GMT'}]
|
2017-02-10
|
[array(['Mendes', 'Hammurabi', ''], dtype=object)
array(['Herlihy', 'Maurice', ''], dtype=object)]
|
1,825 |
1907.05834
|
Monica Vidaurri
|
Monica Vidaurri, Alia Wofford, Jonathan Brande, Gabriel Black-Planas,
Shawn Domagal-Goldman, Jacob Haqq-Misra
|
Absolute Prioritization of Planetary Protection, Safety, and Avoiding
Imperialism in All Future Science Missions: A Policy Perspective
|
11 pages
| null | null | null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The prioritization and improvement of ethics, planetary protection, and
safety standards in the astro-sciences is the most critical priority as our
scientific and exploratory capabilities progress, both within government
agencies and the private sector. These priorities lie in the belief that every
single science mission - crewed or non-crewed, ground-based or not - should
heed strict ethical and safety standards starting at the very beginning of a
mission. Given the inevitability of the private sector in influencing future
crewed missions both in and beyond low-Earth orbit, it is essential to the
science community to agree on universal standards of safety, mission assurance,
planetary protection, and especially anti-colonization. These issues will
impact all areas of space science. Examples that are particularly relevant to
the Astro2020 Decadal Survey include but are not limited to: light pollution
from satellites, the voices and rights of Native people when constructing
telescopes on their lands, and the need to be cognizant of contamination when
searching for and exploring habitable environments beyond Earth. Ultimately,
moving international space law and domestic space policy from a reactive nature
to a proactive one will ensure the future of space exploration is one that is
safe, transparent, and anti-imperialist.
|
[{'version': 'v1', 'created': 'Fri, 12 Jul 2019 16:50:50 GMT'}]
|
2019-07-15
|
[array(['Vidaurri', 'Monica', ''], dtype=object)
array(['Wofford', 'Alia', ''], dtype=object)
array(['Brande', 'Jonathan', ''], dtype=object)
array(['Black-Planas', 'Gabriel', ''], dtype=object)
array(['Domagal-Goldman', 'Shawn', ''], dtype=object)
array(['Haqq-Misra', 'Jacob', ''], dtype=object)]
|
1,826 |
2006.01300
|
Hanieh Hashemi
|
Hanieh Hashemi, Yongqin Wang, Murali Annavaram
|
DarKnight: A Data Privacy Scheme for Training and Inference of Deep
Neural Networks
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Protecting the privacy of input data is of growing importance as machine
learning methods reach new application domains. In this paper, we provide a
unified training and inference framework for large DNNs while protecting input
privacy and computation integrity. Our approach called DarKnight uses a novel
data blinding strategy using matrix masking to create input obfuscation within
a trusted execution environment (TEE). Our rigorous mathematical proof
demonstrates that our blinding process provides information-theoretic privacy
guarantee by bounding information leakage. The obfuscated data can then be
offloaded to any GPU for accelerating linear operations on blinded data. The
results from linear operations on blinded data are decoded before performing
non-linear operations within the TEE. This cooperative execution allows
DarKnight to exploit the computational power of GPUs to perform linear
operations while exploiting TEEs to protect input privacy. We implement
DarKnight on an Intel SGX TEE augmented with a GPU to evaluate its performance.
|
[{'version': 'v1', 'created': 'Mon, 1 Jun 2020 22:40:57 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Oct 2020 21:01:26 GMT'}]
|
2020-10-19
|
[array(['Hashemi', 'Hanieh', ''], dtype=object)
array(['Wang', 'Yongqin', ''], dtype=object)
array(['Annavaram', 'Murali', ''], dtype=object)]
|
1,827 |
1411.7626
|
Mingzhe Li
|
Mingzhe Li
|
Entropic mechanisms with generalized scalar fields in the Ekpyrotic
universe
|
11 pages, PLB version, minor typos were corrected
|
Phys. Lett. B 741, 320-326 (2015)
|
10.1016/j.physletb.2015.01.009
|
USTC-ICTS-14-19
|
hep-th astro-ph.CO gr-qc hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For the Ekpyrotic universe, the entropic mechanisms with minimal couplings,
which have been used to generate nearly scale invariant primordial
perturbations, was proved to be unstable. To overcome this difficulty, some
non-minimal coupling entropic models were proposed. In this paper we extend
these studies to the cases where all the scalar fields have non-standard
kinetic terms. We first prove that in these general cases, without non-minimal
couplings the entropic models are still unstable. The condition for the
stability conflicts with the requirement for achieving scale invariant
perturbations. Then we study the non-minimal coupling models and show that at
least for some simple cases these models are stable and able to generate the
primordial perturbations consistent with current observations.
|
[{'version': 'v1', 'created': 'Thu, 27 Nov 2014 15:23:15 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Jan 2015 04:01:03 GMT'}
{'version': 'v3', 'created': 'Wed, 28 Jan 2015 01:25:42 GMT'}]
|
2018-05-09
|
[array(['Li', 'Mingzhe', ''], dtype=object)]
|
1,828 |
1503.08714
|
Abdul Jawad
|
Ines. G. Salako and Abdul Jawad
|
Superresonance Phenomenon from Acoustic Black Holes in Neo-Newtonian
theory
|
9 pages; 1 figure. arXiv admin note: text overlap with
arXiv:1101.2891
|
Int. J. Mod. Phys. D 25(2016)1650055
|
10.1142/S0218271816500553
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We explore the possibility of the acoustic analogue of a super-radiance like
phenomenon, i.e., the amplification of a sound wave by reflection from the
ergo-region of a rotating acoustic black hole in the fluid draining bathtub
model in the presence of the pressure be amplified or reduced in agreement with
the value of the parameter $\left(\gamma=1+ \frac{kn\rho_0^{n-1}
}{c^2}\right)$. We remark that the interval of frequencies depend upon the
neo-newtonian parameter $\gamma$\, ($\bar{\Omega}_H = \frac{2
}{1+\gamma}\;\Omega_{H}$)\textbf{ and becomes narrow in this work}. As a
consequence, the tuning of the neo-newtonian parameter $\left(\gamma=1+
\frac{kn\rho_0^{n-1} }{c^2}\right)$ changes the rate of loss of the acoustic
black hole mass.
|
[{'version': 'v1', 'created': 'Fri, 27 Mar 2015 14:35:25 GMT'}
{'version': 'v2', 'created': 'Thu, 14 Apr 2016 11:26:14 GMT'}]
|
2016-04-15
|
[array(['Salako', 'Ines. G.', ''], dtype=object)
array(['Jawad', 'Abdul', ''], dtype=object)]
|
1,829 |
1003.0151
|
Bing Wang
|
Bing Wang
|
Ricci flow on Orbifold
| null | null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study the behavior of Ricci flows on compact orbifolds with
finite singularities. We show that Perelman's pseudolocality theorem also holds
on orbifold Ricci flow. Using this property, we obtain a weak compactness
theorem of Ricci flows on orbifolds under some natural technical conditions.
This generalizes the corresponding theorem on manifolds. As an application, we
can use K\"ahler Ricci flow to find new K\"ahler Einstein metrics on some
orbifold Fano surfaces. For example, if $Y$ is a cubic surface with only one
ordinary double point or $Y$ is an orbifold Fano surface with degree 1 and
every singularity on it is a rational double point of type $\A_k (1 \leq k \leq
6)$, then we can find a KE metric of $Y$ by running K\"ahler Ricci flow.
|
[{'version': 'v1', 'created': 'Sun, 28 Feb 2010 04:53:13 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Jul 2010 15:55:13 GMT'}]
|
2010-07-12
|
[array(['Wang', 'Bing', ''], dtype=object)]
|
1,830 |
2201.07116
|
Satya Prakash Nayak
|
Satya Prakash Nayak, Daniel Neider, Rajarshi Roy, Martin Zimmermann
|
Robust Computation Tree Logic
|
Published in the proceedings of NASA Formal Methods (NFM), 2022
| null | null | null |
cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is widely accepted that every system should be robust in that ``small''
violations of environment assumptions should lead to ``small'' violations of
system guarantees, but it is less clear how to make this intuition
mathematically precise. While significant efforts have been devoted to
providing notions of robustness for Linear Temporal Logic (LTL), branching-time
logics, such as Computation Tree Logic (CTL) and CTL*, have received less
attention in this regard. To address this shortcoming, we develop ``robust''
extensions of CTL and CTL*, which we name robust CTL (rCTL) and robust CTL*
(rCTL*). Both extensions are syntactically similar to their parent logics but
employ multi-valued semantics to distinguish between ``large'' and ``small''
violations of the specification. We show that the multi-valued semantics of
rCTL make it more expressive than CTL, while rCTL* is as expressive as CTL*.
Moreover, we show that the model checking problem, the satisfiability problem,
and the synthesis problem for rCTL and rCTL* have the same asymptotic
complexity as their non-robust counterparts, implying that robustness can be
added to branching-time logics for free.
|
[{'version': 'v1', 'created': 'Tue, 18 Jan 2022 16:45:08 GMT'}
{'version': 'v2', 'created': 'Thu, 31 Mar 2022 07:09:56 GMT'}
{'version': 'v3', 'created': 'Thu, 7 Apr 2022 09:33:26 GMT'}
{'version': 'v4', 'created': 'Sat, 7 May 2022 17:49:04 GMT'}
{'version': 'v5', 'created': 'Tue, 17 Jan 2023 04:28:29 GMT'}]
|
2023-01-18
|
[array(['Nayak', 'Satya Prakash', ''], dtype=object)
array(['Neider', 'Daniel', ''], dtype=object)
array(['Roy', 'Rajarshi', ''], dtype=object)
array(['Zimmermann', 'Martin', ''], dtype=object)]
|
1,831 |
1701.04613
|
A. N. Ivanov
|
A. N. Ivanov, R. H\"ollwieser, N. I. Troitskaya, M. Wellenzohn, and
Ya. A. Berdnikov
|
Precision Theoretical Analysis of Neutron Radiative Beta Decay
|
15 pages, 1 figure
|
Phys. Rev. D 95, 033007 (2017)
|
10.1103/PhysRevD.95.033007
| null |
hep-ph hep-ex nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the Standard Model of electroweak interactions and in the
tree--approximation we calculate the rate and branching ratio of the neutron
radiative beta decay with one-real photon emission by taking into account the
contributions of the weak magnetism and proton recoil to order 1/m_p of the
large proton mass m_p expansion. We find that the obtained contributions of the
weak magnetism and proton recoil increase the rate and branching ratio of the
neutron radiative beta decay by about 0.70%. This is large compared with the
contribution of the weak magnetism and proton recoil of about 0.16% to the rate
of the neutron beta decay, calculated in Phys. Rev. D88, 073002 (2013).
|
[{'version': 'v1', 'created': 'Tue, 17 Jan 2017 10:50:13 GMT'}]
|
2017-03-01
|
[array(['Ivanov', 'A. N.', ''], dtype=object)
array(['Höllwieser', 'R.', ''], dtype=object)
array(['Troitskaya', 'N. I.', ''], dtype=object)
array(['Wellenzohn', 'M.', ''], dtype=object)
array(['Berdnikov', 'Ya. A.', ''], dtype=object)]
|
1,832 |
math-ph/0410031
|
Andrzej Wereszczynski
|
A. Wereszczynski
|
Nested Multi-Soliton Solutions with Arbitrary Hopf Index
|
11 pages, 4 figures
|
ActaPhys.Polon.B35:2367-2376,2004
| null | null |
math-ph math.MP
| null |
Generalized Aratyn-Ferreira-Zimerman O(3) nonlinear sigma model with a
particular symmetry breaking term, so-called dielectric function, is discussed.
Static multi-soliton configurations with finite energy and nontrivial Hopf
index are found. We show that such configurations consist of nested toroidal
solitons. Moreover, nontrivial sphaleron-like solutions i.e. configurations
with zero total topological charge are also presented.
|
[{'version': 'v1', 'created': 'Mon, 11 Oct 2004 12:24:17 GMT'}]
|
2008-11-26
|
[array(['Wereszczynski', 'A.', ''], dtype=object)]
|
1,833 |
1311.7377
|
Istvan Nandori
|
I. G. Marian, U. D. Jentschura and I. Nandori
|
The Numerically Optimized Regulator and the Functional Renormalization
Group
|
15 pages, 9 figures, final version, published in Journal of Physics G
|
J. Phys. G: Nucl. Part. Phys. 41 (2014) 055001
|
10.1088/0954-3899/41/5/055001
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We aim to optimize the functional form of the compactly supported smooth
(CSS) regulator within the functional renormalization group (RG), in the
framework of bosonized two-dimensional Quantum Electrodynamics (QED_2) and of
the three-dimensional O(N=1) scalar field theory in the local potential
approximation (LPA). The principle of minimal sensitivity (PMS) is used for the
optimization of the CSS regulator, recovering all the major types of regulators
in appropriate limits. Within the investigated class of functional forms, a
thorough investigation of the CSS regulator, optimized with two different
normalizations within the PMS method, confirms that the functional form of a
regulator first proposed by Litim is optimal within the LPA. However, Litim's
exact form leads to a kink in the regulator function. A form of the CSS
regulator, numerically close to Litim's limit while maintaining infinite
differentiability, remains compatible with the gradient expansion to all
orders. A smooth analytic behaviour of the regulator is ensured by a small, but
finite value of the exponential fall-off parameter in the CSS regulator.
Consequently, a compactly supported regulator, in a parameter regime close to
Litim's optimized form, but regularized with an exponential factor, appears to
have favorable properties and could be used to address the scheme dependence of
the functional renormalization group, at least within the the approximations
employed in the studies reported here.
|
[{'version': 'v1', 'created': 'Thu, 28 Nov 2013 17:21:15 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Jan 2014 19:52:05 GMT'}
{'version': 'v3', 'created': 'Thu, 13 Mar 2014 21:38:55 GMT'}]
|
2014-03-17
|
[array(['Marian', 'I. G.', ''], dtype=object)
array(['Jentschura', 'U. D.', ''], dtype=object)
array(['Nandori', 'I.', ''], dtype=object)]
|
1,834 |
astro-ph/0503437
|
John M. Porter
|
John M. Porter (Liverpool John Moores University, UK) R. H. D.
Townsend (Bartol Research Institute, and University College London, UK)
|
On the evidence for discs around Blue Straggler stars
|
4 pages, 4 figures. Accepted for publication in Ap.J. Letters
|
Astrophys.J.623:L129-L132,2005
|
10.1086/430271
| null |
astro-ph
| null |
Recent observations of blue stragglers by De Marco et al. (2004) have
revealed continuum deficits on the blue side of the Balmer discontinuity,
leading these authors to infer the presence of discs around the stars. This
intriguing possibility may throw light on aspects of the mechanisms responsible
for at least some of these objects; current theories of blue straggler
formation invoke stellar collisions or interacting binaries, both of which
appear capable of forming a circumstellar disc.
However, by synthesizing photospheric spectra for models of rotating blue
stragglers, we demonstrate that the Balmer jump enhancements can be wholly
attributed to the influence of oblateness and gravity darkening on the
formation of the continuum. Therefore, we are led to conclude that the
observations of De Marco et al. can be ascribed a more prosaic explanation,
that of rapid stellar rotation arising from the merger/interaction formation
process.
|
[{'version': 'v1', 'created': 'Mon, 21 Mar 2005 11:16:05 GMT'}]
|
2011-05-12
|
[array(['Porter', 'John M.', '', 'Liverpool John Moores University, UK'],
dtype=object)
array(['Townsend', 'R. H. D.', '',
'Bartol Research Institute, and University College London, UK'],
dtype=object) ]
|
1,835 |
2104.10296
|
Sina Karimi
|
Sina Karimi, Rafael Gomes Braga, Ivanka Iordanova and David St-Onge
|
Semantic Navigation Using Building Information on Construction Sites
|
7 pages, 7 figures, conference
| null | null | null |
cs.RO
|
http://creativecommons.org/licenses/by/4.0/
|
With the growth in automated data collection of construction projects, the
need for semantic navigation of mobile robots is increasing. In this paper, we
propose an infrastructure to leverage building-related information for smarter,
safer and more precise robot navigation during construction phase. Our use of
Building Information Models (BIM) in robot navigation is twofold: (1) the
intuitive semantic information enables non-experts to deploy robots and (2) the
semantic data exposed to the navigation system allows optimal path planning
(not necessarily the shortest one). Our Building Information Robotic System
(BIRS) uses Industry Foundation Classes (IFC) as the interoperable data format
between BIM and the Robotic Operating System (ROS). BIRS generates topological
and metric maps from BIM for ROS usage. An optimal path planer, integrating
critical components for construction assessment is proposed using a cascade
strategy (global versus local). The results are validated through series of
experiments in construction sites.
|
[{'version': 'v1', 'created': 'Wed, 21 Apr 2021 01:02:50 GMT'}]
|
2021-04-22
|
[array(['Karimi', 'Sina', ''], dtype=object)
array(['Braga', 'Rafael Gomes', ''], dtype=object)
array(['Iordanova', 'Ivanka', ''], dtype=object)
array(['St-Onge', 'David', ''], dtype=object)]
|
1,836 |
2305.09315
|
Yuwei Zhang
|
Yuwei Zhang and Ge Li and Zhi Jin and Ying Xing
|
Neural Program Repair with Program Dependence Analysis and Effective
Filter Mechanism
|
12 pages, 7 figures
| null | null | null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Automated program repair is a crucial task for improving the efficiency of
software developers. Recently, neural-based techniques have demonstrated
significant promise in generating correct patches for buggy code snippets.
However, most existing approaches arbitrarily treat the buggy context without
any analysis to capture the semantic relationship between the buggy statement
and its context. Additionally, we observe that existing neural models may
output an unaltered patch consistent with the input buggy code snippet, which
fails to be the correct human-written one for fixing the given bug. To address
the aforementioned limitations, we present in this paper a novel neural program
repair framework called \approach, which adapts the general pre-trained
language model for fixing single-line Java bugs. We make the first attempt to
use program slicing to extract contextual information directly related to the
given buggy statement as repair ingredients from the corresponding program
dependence graph and eliminate unaltered patches using an intuitive but
effective filter mechanism. We demonstrate the effectiveness of \approach on
five benchmarks when compared with state-of-the-art baselines.
|
[{'version': 'v1', 'created': 'Tue, 16 May 2023 09:43:04 GMT'}]
|
2023-05-17
|
[array(['Zhang', 'Yuwei', ''], dtype=object)
array(['Li', 'Ge', ''], dtype=object)
array(['Jin', 'Zhi', ''], dtype=object)
array(['Xing', 'Ying', ''], dtype=object)]
|
1,837 |
0911.1308
|
Loet Leydesdorff
|
Diana Lucio-Arias, Loet Leydesdorff
|
The Dynamics of Exchanges and References among Scientific Texts, and the
Autopoiesis of Discursive Knowledge
| null |
Journal of Informetrics 3(3) (2009) 261-271
| null | null |
cs.CY cs.DL physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Discursive knowledge emerges as codification in flows of communication. The
flows of communication are constrained and enabled by networks of
communications as their historical manifestations at each moment of time. New
publications modify the existing networks by changing the distributions of
attributes and relations in document sets, while the networks are
self-referentially updated along trajectories. Codification operates
reflexively: the network structures are reconstructed from the perspective of
hindsight. Codification along different axes differentiates discursive
knowledge into specialties. These intellectual control structures are
constructed bottom-up, but feed top-down back upon the production of new
knowledge. However, the forward dynamics of diffusion in the development of the
communication networks along trajectories differs from the feedback mechanisms
of control. Analysis of the development of scientific communication in terms of
evolving scientific literatures provides us with a model which makes these
evolutionary processes amenable to measurement.
|
[{'version': 'v1', 'created': 'Fri, 6 Nov 2009 17:34:48 GMT'}]
|
2009-11-09
|
[array(['Lucio-Arias', 'Diana', ''], dtype=object)
array(['Leydesdorff', 'Loet', ''], dtype=object)]
|
1,838 |
2303.08160
|
Ayesha Asloob Qureshi
|
Asl{\i} Musapa\c{s}ao\u{g}lu, Mehrdad Nasernejad, Ayesha Asloob
Qureshi
|
The edge ideals of $\bf{t}$-spread $d$-partite hypergraphs
|
Comments are welcome
| null | null | null |
math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inspired by the definition of $\bf{t}$-spread monomial ideals, in this paper,
we introduce $\bf{t}$-spread $d$-partite hypergraph $K^{\bf t}_V$ and study its
edge ideal $I(K^{\bf t}_V)$. We prove that $I(K^{\bf t}_V)$ has linear
quotients, all powers of $I(K^{\bf t}_V)$ have linear resolution and the Rees
algebra of $I(K^{\bf t}_V)$ is a normal Cohen-Macaulay domain. It is also shown
that $I(K^{\bf t}_V)$ is normally torsion-free and a complete characterization
of Cohen-Macaulay $S/I(K^{\bf t}_V)$ is given.
|
[{'version': 'v1', 'created': 'Tue, 14 Mar 2023 18:21:12 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Mar 2023 12:59:09 GMT'}]
|
2023-03-23
|
[array(['Musapaşaoğlu', 'Aslı', ''], dtype=object)
array(['Nasernejad', 'Mehrdad', ''], dtype=object)
array(['Qureshi', 'Ayesha Asloob', ''], dtype=object)]
|
1,839 |
1804.04454
|
Kazi Rafsanjani Amin
|
Kazi Rafsanjani Amin, Samriddhi Sankar Ray, Nairita Pal, Rahul Pandit
and Aveek Bid
|
Exotic Multifractal Conductance Fluctuations in Graphene
| null |
Communications Physics, volume 1, Article number: 1 (2018)
|
10.1038/s42005-017-0001-4
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In quantum systems, signatures of multifractality are rare. They have been
found only in the multiscaling of eigenfunctions at critical points. Here we
demonstrate multifractality in the magnetic-field-induced universal conductance
fluctuations of the conductance in a quantum condensed-matter system, namely,
high-mobility single-layer graphene field-effect transistors. This
multifractality decreases as the temperature increases or as doping moves the
system away from the Dirac point. Our measurements and analysis present
evidence for an incipient Anderson-localization near the Dirac point as the
most plausible cause for this multifractality. Our experiments suggest that
multifractality in the scaling behaviour of local eigenfunctions are reflected
in macroscopic transport coefficients. We conjecture that an incipient
Anderson-localization transition may be the origin of this multifractality. It
is possible that multifractality is ubiquitous in transport properties of
low-dimensional systems. Indeed, our work suggests that we should look for
multifractality in transport in other low-dimensional quantum condensed-matter
systems.
|
[{'version': 'v1', 'created': 'Thu, 12 Apr 2018 12:06:18 GMT'}]
|
2018-04-13
|
[array(['Amin', 'Kazi Rafsanjani', ''], dtype=object)
array(['Ray', 'Samriddhi Sankar', ''], dtype=object)
array(['Pal', 'Nairita', ''], dtype=object)
array(['Pandit', 'Rahul', ''], dtype=object)
array(['Bid', 'Aveek', ''], dtype=object)]
|
1,840 |
2211.13133
|
Lukas Schneider
|
Philip de Rijk, Lukas Schneider, Marius Cordts, Dariu M. Gavrila
|
Structural Knowledge Distillation for Object Detection
| null | null | null | null |
cs.CV cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Knowledge Distillation (KD) is a well-known training paradigm in deep neural
networks where knowledge acquired by a large teacher model is transferred to a
small student. KD has proven to be an effective technique to significantly
improve the student's performance for various tasks including object detection.
As such, KD techniques mostly rely on guidance at the intermediate feature
level, which is typically implemented by minimizing an lp-norm distance between
teacher and student activations during training. In this paper, we propose a
replacement for the pixel-wise independent lp-norm based on the structural
similarity (SSIM). By taking into account additional contrast and structural
cues, feature importance, correlation and spatial dependence in the feature
space are considered in the loss formulation. Extensive experiments on MSCOCO
demonstrate the effectiveness of our method across different training schemes
and architectures. Our method adds only little computational overhead, is
straightforward to implement and at the same time it significantly outperforms
the standard lp-norms. Moreover, more complex state-of-the-art KD methods using
attention-based sampling mechanisms are outperformed, including a +3.5 AP gain
using a Faster R-CNN R-50 compared to a vanilla model.
|
[{'version': 'v1', 'created': 'Wed, 23 Nov 2022 17:06:52 GMT'}]
|
2022-11-24
|
[array(['de Rijk', 'Philip', ''], dtype=object)
array(['Schneider', 'Lukas', ''], dtype=object)
array(['Cordts', 'Marius', ''], dtype=object)
array(['Gavrila', 'Dariu M.', ''], dtype=object)]
|
1,841 |
cond-mat/0105232
|
Antonio Prados
|
J. Javier Brey and A. Prados
|
Memory effects in the relaxation of Ising models
|
7 pages, 2 figures; accepted (revised) version, to appear in
Europhysics Letters
|
Europhysics Letters 57, 171-177 (2002)
|
10.1209/epl/i2002-00558-3
| null |
cond-mat.stat-mech
| null |
It is analytically shown that the one-dimensional Ising model with Glauber
dynamics exhibits short time memory effects when submitted to an abrupt change
in the temperature. These effects are qualitatively similar to those
experimentally observed in the compaction of vibrated granular materials.
Moreover, a critical time separating regimes of ``normal'' and ``anomalous''
responses to the perturbation is found.
|
[{'version': 'v1', 'created': 'Fri, 11 May 2001 11:43:43 GMT'}
{'version': 'v2', 'created': 'Tue, 6 Nov 2001 15:22:38 GMT'}]
|
2009-11-07
|
[array(['Brey', 'J. Javier', ''], dtype=object)
array(['Prados', 'A.', ''], dtype=object)]
|
1,842 |
2102.03691
|
Alexander Gabourie
|
Alexander J. Gabourie, Zheyong Fan, Tapio Ala-Nissila, Eric Pop
|
Spectral Decomposition of Thermal Conductivity: Comparing Velocity
Decomposition Methods in Homogeneous Molecular Dynamics Simulations
|
19 Pages, 8 Figures
|
Phys. Rev. B 103, 205421 (2021)
|
10.1103/PhysRevB.103.205421
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The design of new applications, especially those based on heterogeneous
integration, must rely on detailed knowledge of material properties, such as
thermal conductivity (TC). To this end, multiple methods have been developed to
study TC as a function of vibrational frequency. Here, we compare three
spectral TC methods based on velocity decomposition in homogenous molecular
dynamics simulations: Green-Kubo modal analysis (GKMA), the spectral heat
current (SHC) method, and a method we propose called homogeneous nonequilibrium
modal analysis (HNEMA). First, we derive a convenient per-atom virial
expression for systems described by general many-body potentials, enabling
compact representations of the heat current, each velocity decomposition
method, and other related quantities. Next, we evaluate each method by
calculating the spectral TC for carbon nanotubes, graphene, and silicon. We
show that each method qualitatively agrees except at optical phonon
frequencies, where a combination of mismatched eigenvectors and a large density
of states produces artificial TC peaks for modal analysis methods. Our
calculations also show that the HNEMA and SHC methods converge much faster than
the GKMA method, with the SHC method being the most computationally efficient.
Finally, we demonstrate that our single-GPU modal analysis implementation in
GPUMD (Graphics Processing Units Molecular Dynamics) is over 1000 times faster
than the existing LAMMPS (Large-scale Atomic/Molecular Massively Parallel
Simulator) implementation on one CPU.
|
[{'version': 'v1', 'created': 'Sun, 7 Feb 2021 00:17:06 GMT'}]
|
2021-05-18
|
[array(['Gabourie', 'Alexander J.', ''], dtype=object)
array(['Fan', 'Zheyong', ''], dtype=object)
array(['Ala-Nissila', 'Tapio', ''], dtype=object)
array(['Pop', 'Eric', ''], dtype=object)]
|
1,843 |
quant-ph/0702022
|
Philippe Raynal
|
Philippe Raynal, Norbert L\"utkenhaus
|
Optimal unambiguous state discrimination of two density matrices: A
second class of exact solutions
|
final published version: 18 pages, 5 figures. to appear in PRA
|
Phys. Rev. A Vol 76, 052322 (2007)
|
10.1103/PhysRevA.76.052322
| null |
quant-ph
| null |
We consider the Unambiguous State Discrimination (USD) of two mixed quantum
states. We study the rank and the spectrum of the elements of an optimal USD
measurement. This naturally leads to a partial fourth reduction theorem. This
theorem shows that either the failure probability equals its overall lower
bound given in term of the fidelity or a two-dimensional subspace can be split
off from the original Hilbert space. We then use this partial reduction theorem
to derive the optimal solution for any two equally probable Geometrically
Uniform (GU) states $\rho_0$ and $\rho_1=U\rho_0 U^\dagger$, $U^2={\openone}$,
in a four-dimensional Hilbert space. This represents a second class of
analytical solutions for USD problems that cannot be reduced to some pure state
cases. We apply our result to answer two questions that are relevant in
implementations of the Bennett and Brassard 1984 quantum key distribution
protocol using weak coherent states.
|
[{'version': 'v1', 'created': 'Fri, 2 Feb 2007 19:26:31 GMT'}
{'version': 'v2', 'created': 'Sat, 3 Nov 2007 16:32:00 GMT'}]
|
2007-12-11
|
[array(['Raynal', 'Philippe', ''], dtype=object)
array(['Lütkenhaus', 'Norbert', ''], dtype=object)]
|
1,844 |
0912.3428
|
John Ellis
|
John Ellis, Nick E. Mavromatos, Dimitri V. Nanopoulos
|
D-Foam Phenomenology: Dark Energy, the Velocity of Light and a Possible
D-Void
|
10 pages, 3 figures
|
Int.J.Mod.Phys.A26:2243-2262,2011
|
10.1142/S0217751X11053353
|
CERN-PH-TH/2009-247
|
astro-ph.CO gr-qc hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a D-brane model of space-time foam, there are contributions to the dark
energy that depend on the D-brane velocities and on the density of D-particle
defects. The latter may also reduce the speeds of photons linearly with their
energies, establishing a phenomenological connection with astrophysical probes
of the universality of the velocity of light. Specifically, the cosmological
dark energy density measured at the present epoch may be linked to the apparent
retardation of energetic photons propagating from nearby AGNs. However, this
nascent field of `D-foam phenomenology' may be complicated by a dependence of
the D-particle density on the cosmological epoch. A reduced density of
D-particles at redshifts z ~ 1 - a `D-void' - would increase the dark energy
while suppressing the vacuum refractive index, and thereby might reconcile the
AGN measurements with the relatively small retardation seen for the energetic
photons propagating from GRB 090510, as measured by the Fermi satellite.
|
[{'version': 'v1', 'created': 'Thu, 17 Dec 2009 15:21:21 GMT'}]
|
2011-05-25
|
[array(['Ellis', 'John', ''], dtype=object)
array(['Mavromatos', 'Nick E.', ''], dtype=object)
array(['Nanopoulos', 'Dimitri V.', ''], dtype=object)]
|
1,845 |
2111.13810
|
Joseph Kuehl
|
Vitalii A. Sheremet, Arham Amin Khan, Joseph Kuehl
|
Multiple Equilibrium States of the Loop Current in the Gulf of Mexico
| null | null | null | null |
physics.ao-ph
|
http://creativecommons.org/licenses/by/4.0/
|
It is known that western boundary currents, which encounter a gap in their
supporting boundary, assume two dominant steady states: a loop current state
and a gap leaping state, and that transitions between these states display
hysteresis. However, a question of whether the idealized geometries considered
to date apply to the Gulf of Mexico Loop Current (LC) remained. Here, the
nonlinear potential vorticity advection-diffusions equations are solved, for
Gulf of Mexico topography, using Newton's Method. We demonstrate that, in
application to the LC in the Gulf of Mexico, the original conclusions do hold
and additionally describe peculiarities of the more realistic steady states
that have implications for the LC modeling and forecasting.
|
[{'version': 'v1', 'created': 'Sat, 27 Nov 2021 04:09:02 GMT'}]
|
2022-04-13
|
[array(['Sheremet', 'Vitalii A.', ''], dtype=object)
array(['Khan', 'Arham Amin', ''], dtype=object)
array(['Kuehl', 'Joseph', ''], dtype=object)]
|
1,846 |
2102.01587
|
Benjamin Golub
|
Evan Sadler and Benjamin Golub
|
Games on Endogenous Networks
| null | null | null | null |
econ.TH cs.GT cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study network games in which players choose both the partners with whom
they associate and an action level (e.g., effort) that creates spillovers for
those partners. We introduce a framework and two solution concepts, extending
standard approaches for analyzing each choice in isolation: Nash equilibrium in
actions and pairwise stability in links. Our main results show that, under
suitable order conditions on incentives, stable networks take simple forms. The
first condition concerns whether links create positive or negative payoff
spillovers. The second concerns whether actions are strategic complements to
links, or strategic substitutes. Together, these conditions yield a taxonomy of
the relationship between network structure and economic primitives organized
around two network architectures: ordered overlapping cliques and nested split
graphs. We apply our model to understand the consequences of competition for
status, to microfound matching models that assume clique formation, and to
interpret empirical findings that highlight unintended consequences of group
design.
|
[{'version': 'v1', 'created': 'Tue, 2 Feb 2021 16:27:00 GMT'}
{'version': 'v2', 'created': 'Fri, 14 May 2021 06:01:59 GMT'}
{'version': 'v3', 'created': 'Mon, 30 Aug 2021 05:58:52 GMT'}
{'version': 'v4', 'created': 'Sat, 18 Sep 2021 19:32:33 GMT'}
{'version': 'v5', 'created': 'Mon, 27 Sep 2021 05:46:40 GMT'}
{'version': 'v6', 'created': 'Sun, 11 Sep 2022 21:07:10 GMT'}
{'version': 'v7', 'created': 'Fri, 17 Feb 2023 20:16:19 GMT'}]
|
2023-02-21
|
[array(['Sadler', 'Evan', ''], dtype=object)
array(['Golub', 'Benjamin', ''], dtype=object)]
|
1,847 |
1502.01058
|
Sergii Strelchuk
|
Harry Buhrman, Lukasz Czekaj, Andrzej Grudka, Michal Horodecki, Pawel
Horodecki, Marcin Markiewicz, Florian Speelman, Sergii Strelchuk
|
Quantum communication complexity advantage implies violation of a Bell
inequality
|
main text did not change. Modified the acknowledgements section
|
PNAS March 22, 2016 vol. 113 no. 12 3191-3196
|
10.1073/pnas.1507647113
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We obtain a general connection between a quantum advantage in communication
complexity and non-locality. We show that given any protocol offering a
(sufficiently large) quantum advantage in communication complexity, there
exists a way of obtaining measurement statistics which violate some Bell
inequality. Our main tool is port-based teleportation. If the gap between
quantum and classical communication complexity can grow arbitrarily large, the
ratio of the quantum value to the classical value of the Bell quantity becomes
unbounded with the increase in the number of inputs and outputs.
|
[{'version': 'v1', 'created': 'Tue, 3 Feb 2015 22:39:48 GMT'}
{'version': 'v2', 'created': 'Sun, 28 Jun 2015 23:12:31 GMT'}
{'version': 'v3', 'created': 'Tue, 30 Jun 2015 17:28:48 GMT'}
{'version': 'v4', 'created': 'Thu, 2 Jul 2015 21:31:52 GMT'}]
|
2016-09-16
|
[array(['Buhrman', 'Harry', ''], dtype=object)
array(['Czekaj', 'Lukasz', ''], dtype=object)
array(['Grudka', 'Andrzej', ''], dtype=object)
array(['Horodecki', 'Michal', ''], dtype=object)
array(['Horodecki', 'Pawel', ''], dtype=object)
array(['Markiewicz', 'Marcin', ''], dtype=object)
array(['Speelman', 'Florian', ''], dtype=object)
array(['Strelchuk', 'Sergii', ''], dtype=object)]
|
1,848 |
1511.07855
|
Daniel Parry
|
Kathrin Bringmann, Robert Rhoades, Daniel Parry
|
On the Andrews-Zagier asymptotics for partitions without sequences
| null | null | null | null |
math.NT math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We establish the asymptotic behavior of the Andrews $G_k(q)$ function as
$q\to 1.$
|
[{'version': 'v1', 'created': 'Sun, 22 Nov 2015 20:24:59 GMT'}]
|
2017-05-16
|
[array(['Bringmann', 'Kathrin', ''], dtype=object)
array(['Rhoades', 'Robert', ''], dtype=object)
array(['Parry', 'Daniel', ''], dtype=object)]
|
1,849 |
2008.10659
|
Silvia Masi
|
S. Masi, E.S. Battistelli, P. de Bernardis, C. Chapron, F. Columbro,
G. D'Alessandro, M. De Petris, L. Grandsire, J.-Ch. Hamilton, S. Marnieros,
L. Mele, A. May, A. Mennella, C. O'Sullivan, A. Paiella, F. Piacentini, M.
Piat, L. Piccirillo, G. Presta, A. Schillaci, A. Tartari, J.-P. Thermeau,
S.A. Torchinsky, F. Voisin, M. Zannoni, P. Ade, J.G. Alberro, A. Almela, G.
Amico, L.H. Arnaldi, D. Auguste, J. Aumont, S. Azzoni, S. Banfi, B. B\'elier,
A. Ba\`u, D. Bennett, L. Berg\'e, J.-Ph. Bernard, M. Bersanelli, M.-A.
Bigot-Sazy, J. Bonaparte, J. Bonis, E. Bunn, D. Burke, D. Buzi, F. Cavaliere,
P. Chanial, R. Charlassier, A.C. Cobos Cerutti, A. Coppolecchia, G. De
Gasperis, M. De Leo, S. Dheilly, C. Duca, L. Dumoulin, A. Etchegoyen, A.
Fasciszewski, L.P. Ferreyro, D. Fracchia, C. Franceschet, M.M. Gamboa Lerena,
K.M. Ganga, B. Garc\'ia, M.E. Garc\'ia Redondo, M. Gaspard, D. Gayer, M.
Gervasi, M. Giard, V. Gilles, Y. Giraud-Heraud, M. G\'omez Berisso, M.
Gonz\'alez, M. Gradziel, M.R. Hampel, D. Harari, S. Henrot-Versill\'e, F.
Incardona, E. Jules, J. Kaplan, C. Kristukat, L. Lamagna, S. Loucatos, T.
Louis, B. Maffei, W. Marty, A. Mattei, M. McCulloch, D. Melo, L. Montier, L.
Mousset, L.M. Mundo, J.A. Murphy, J.D. Murphy, F. Nati, E. Olivieri, C.
Oriol, F. Pajot, A. Passerini, H. Pastoriza, A. Pelosi, C. Perbost, M.
Perciballi, F. Pezzotta, G. Pisano, M. Platino, G. Polenta, D. Pr\^ele, R.
Puddu, D. Rambaud, E. Rasztocky, P. Ringegni, G.E. Romero, J.M. Salum, C.G.
Sc\'occola, S. Scully, S. Spinelli, G. Stankowiak, M. Stolpovskiy, A.D.
Supanitsky, P. Timbie, M. Tomasi, G. Tucker, C. Tucker, D. Vigan\`o, N.
Vittorio, F. Wicek, M. Wright, A. Zullo
|
QUBIC V: Cryogenic system design and performance
|
This is one of a series of papers on the QUBIC experiment status -
This version of the paper matches the one accepted for publication on Journal
of Cosmology and Astroparticle Physics
| null |
10.1088/1475-7516/2022/04/038
| null |
astro-ph.IM physics.ins-det
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Current experiments aimed at measuring the polarization of the Cosmic
Microwave Background (CMB) use cryogenic detector arrays and cold optical
systems to boost the mapping speed of the sky survey. For these reasons, large
volume cryogenic systems, with large optical windows, working continuously for
years, are needed. Here we report on the cryogenic system of the QUBIC (Q and U
Bolometric Interferometer for Cosmology) experiment: we describe its design,
fabrication, experimental optimization and validation in the Technological
Demonstrator configuration. The QUBIC cryogenic system is based on a large
volume cryostat, using two pulse-tube refrigerators to cool at ~3K a large (~1
m^3) volume, heavy (~165kg) instrument, including the cryogenic polarization
modulator, the corrugated feedhorns array, and the lower temperature stages; a
4He evaporator cooling at ~1K the interferometer beam combiner; a 3He
evaporator cooling at ~0.3K the focal-plane detector arrays. The cryogenic
system has been tested and validated for more than 6 months of continuous
operation. The detector arrays have reached a stable operating temperature of
0.33K, while the polarization modulator has been operated from a ~10K base
temperature. The system has been tilted to cover the boresight elevation range
20 deg -90 deg without significant temperature variations. The instrument is
now ready for deployment to the high Argentinean Andes.
|
[{'version': 'v1', 'created': 'Mon, 24 Aug 2020 19:06:24 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Aug 2021 13:32:52 GMT'}]
|
2022-04-27
|
[array(['Masi', 'S.', ''], dtype=object)
array(['Battistelli', 'E. S.', ''], dtype=object)
array(['de Bernardis', 'P.', ''], dtype=object)
array(['Chapron', 'C.', ''], dtype=object)
array(['Columbro', 'F.', ''], dtype=object)
array(["D'Alessandro", 'G.', ''], dtype=object)
array(['De Petris', 'M.', ''], dtype=object)
array(['Grandsire', 'L.', ''], dtype=object)
array(['Hamilton', 'J. -Ch.', ''], dtype=object)
array(['Marnieros', 'S.', ''], dtype=object)
array(['Mele', 'L.', ''], dtype=object)
array(['May', 'A.', ''], dtype=object)
array(['Mennella', 'A.', ''], dtype=object)
array(["O'Sullivan", 'C.', ''], dtype=object)
array(['Paiella', 'A.', ''], dtype=object)
array(['Piacentini', 'F.', ''], dtype=object)
array(['Piat', 'M.', ''], dtype=object)
array(['Piccirillo', 'L.', ''], dtype=object)
array(['Presta', 'G.', ''], dtype=object)
array(['Schillaci', 'A.', ''], dtype=object)
array(['Tartari', 'A.', ''], dtype=object)
array(['Thermeau', 'J. -P.', ''], dtype=object)
array(['Torchinsky', 'S. A.', ''], dtype=object)
array(['Voisin', 'F.', ''], dtype=object)
array(['Zannoni', 'M.', ''], dtype=object)
array(['Ade', 'P.', ''], dtype=object)
array(['Alberro', 'J. G.', ''], dtype=object)
array(['Almela', 'A.', ''], dtype=object)
array(['Amico', 'G.', ''], dtype=object)
array(['Arnaldi', 'L. H.', ''], dtype=object)
array(['Auguste', 'D.', ''], dtype=object)
array(['Aumont', 'J.', ''], dtype=object)
array(['Azzoni', 'S.', ''], dtype=object)
array(['Banfi', 'S.', ''], dtype=object)
array(['Bélier', 'B.', ''], dtype=object)
array(['Baù', 'A.', ''], dtype=object)
array(['Bennett', 'D.', ''], dtype=object)
array(['Bergé', 'L.', ''], dtype=object)
array(['Bernard', 'J. -Ph.', ''], dtype=object)
array(['Bersanelli', 'M.', ''], dtype=object)
array(['Bigot-Sazy', 'M. -A.', ''], dtype=object)
array(['Bonaparte', 'J.', ''], dtype=object)
array(['Bonis', 'J.', ''], dtype=object)
array(['Bunn', 'E.', ''], dtype=object)
array(['Burke', 'D.', ''], dtype=object)
array(['Buzi', 'D.', ''], dtype=object)
array(['Cavaliere', 'F.', ''], dtype=object)
array(['Chanial', 'P.', ''], dtype=object)
array(['Charlassier', 'R.', ''], dtype=object)
array(['Cerutti', 'A. C. Cobos', ''], dtype=object)
array(['Coppolecchia', 'A.', ''], dtype=object)
array(['De Gasperis', 'G.', ''], dtype=object)
array(['De Leo', 'M.', ''], dtype=object)
array(['Dheilly', 'S.', ''], dtype=object)
array(['Duca', 'C.', ''], dtype=object)
array(['Dumoulin', 'L.', ''], dtype=object)
array(['Etchegoyen', 'A.', ''], dtype=object)
array(['Fasciszewski', 'A.', ''], dtype=object)
array(['Ferreyro', 'L. P.', ''], dtype=object)
array(['Fracchia', 'D.', ''], dtype=object)
array(['Franceschet', 'C.', ''], dtype=object)
array(['Lerena', 'M. M. Gamboa', ''], dtype=object)
array(['Ganga', 'K. M.', ''], dtype=object)
array(['García', 'B.', ''], dtype=object)
array(['Redondo', 'M. E. García', ''], dtype=object)
array(['Gaspard', 'M.', ''], dtype=object)
array(['Gayer', 'D.', ''], dtype=object)
array(['Gervasi', 'M.', ''], dtype=object)
array(['Giard', 'M.', ''], dtype=object)
array(['Gilles', 'V.', ''], dtype=object)
array(['Giraud-Heraud', 'Y.', ''], dtype=object)
array(['Berisso', 'M. Gómez', ''], dtype=object)
array(['González', 'M.', ''], dtype=object)
array(['Gradziel', 'M.', ''], dtype=object)
array(['Hampel', 'M. R.', ''], dtype=object)
array(['Harari', 'D.', ''], dtype=object)
array(['Henrot-Versillé', 'S.', ''], dtype=object)
array(['Incardona', 'F.', ''], dtype=object)
array(['Jules', 'E.', ''], dtype=object)
array(['Kaplan', 'J.', ''], dtype=object)
array(['Kristukat', 'C.', ''], dtype=object)
array(['Lamagna', 'L.', ''], dtype=object)
array(['Loucatos', 'S.', ''], dtype=object)
array(['Louis', 'T.', ''], dtype=object)
array(['Maffei', 'B.', ''], dtype=object)
array(['Marty', 'W.', ''], dtype=object)
array(['Mattei', 'A.', ''], dtype=object)
array(['McCulloch', 'M.', ''], dtype=object)
array(['Melo', 'D.', ''], dtype=object)
array(['Montier', 'L.', ''], dtype=object)
array(['Mousset', 'L.', ''], dtype=object)
array(['Mundo', 'L. M.', ''], dtype=object)
array(['Murphy', 'J. A.', ''], dtype=object)
array(['Murphy', 'J. D.', ''], dtype=object)
array(['Nati', 'F.', ''], dtype=object)
array(['Olivieri', 'E.', ''], dtype=object)
array(['Oriol', 'C.', ''], dtype=object)
array(['Pajot', 'F.', ''], dtype=object)
array(['Passerini', 'A.', ''], dtype=object)
array(['Pastoriza', 'H.', ''], dtype=object)
array(['Pelosi', 'A.', ''], dtype=object)
array(['Perbost', 'C.', ''], dtype=object)
array(['Perciballi', 'M.', ''], dtype=object)
array(['Pezzotta', 'F.', ''], dtype=object)
array(['Pisano', 'G.', ''], dtype=object)
array(['Platino', 'M.', ''], dtype=object)
array(['Polenta', 'G.', ''], dtype=object)
array(['Prêle', 'D.', ''], dtype=object)
array(['Puddu', 'R.', ''], dtype=object)
array(['Rambaud', 'D.', ''], dtype=object)
array(['Rasztocky', 'E.', ''], dtype=object)
array(['Ringegni', 'P.', ''], dtype=object)
array(['Romero', 'G. E.', ''], dtype=object)
array(['Salum', 'J. M.', ''], dtype=object)
array(['Scóccola', 'C. G.', ''], dtype=object)
array(['Scully', 'S.', ''], dtype=object)
array(['Spinelli', 'S.', ''], dtype=object)
array(['Stankowiak', 'G.', ''], dtype=object)
array(['Stolpovskiy', 'M.', ''], dtype=object)
array(['Supanitsky', 'A. D.', ''], dtype=object)
array(['Timbie', 'P.', ''], dtype=object)
array(['Tomasi', 'M.', ''], dtype=object)
array(['Tucker', 'G.', ''], dtype=object)
array(['Tucker', 'C.', ''], dtype=object)
array(['Viganò', 'D.', ''], dtype=object)
array(['Vittorio', 'N.', ''], dtype=object)
array(['Wicek', 'F.', ''], dtype=object)
array(['Wright', 'M.', ''], dtype=object)
array(['Zullo', 'A.', ''], dtype=object)]
|
1,850 |
2008.07131
|
Towfiq Ahmed
|
Towfiq Ahmed, Jinkyoung Yoo, Rohit Prasankumar, Jian-Xin Zhu
|
A real-time TDDFT study of femtosecond laser driven monolayer NbSe2
|
6 pages
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
High harmonic generation (HHG) spectra have the potential to show novel
signatures of ordered phases in condensed matter. We studied the femtosecond
laser-driven electronic response of monolayer NbSe2 using state-of-the-art
computational methods, which can guide future synthesis and optical
characterization. Earlier studies found distinct signatures of charge density
wave (CDW) ordered phases in the ground state of NbSe2 monolayers, in
co-existence with superconductivity. Driving such systems with ultrashort laser
pulses can shed new light on optically controlling various exotic phases (e.g.
CDW) in monolayer NbSe2. This will not only provide a fundamental understanding
of non-equilibrium phase-transitions in NbSe2, but also will open a path
forward for revolutionizing quantum information technologies, such as
valleytronics. To this end, we have studied high harmonic generation (HHG) in
monolayer NbSe2 under various optical pump intensities using real-time
time-dependent density functional theory (RT-TDDFT). Our calculations predict
distinct signatures in HHG spectra for certain harmonics in the presence of CDW
order in monolayer NbSe2. Finally, we also examined the dependence of HHG
spectra on excitation intensity and qualitatively revealed its power-law
behavior.
|
[{'version': 'v1', 'created': 'Mon, 17 Aug 2020 07:42:27 GMT'}
{'version': 'v2', 'created': 'Thu, 17 Dec 2020 23:26:10 GMT'}]
|
2020-12-21
|
[array(['Ahmed', 'Towfiq', ''], dtype=object)
array(['Yoo', 'Jinkyoung', ''], dtype=object)
array(['Prasankumar', 'Rohit', ''], dtype=object)
array(['Zhu', 'Jian-Xin', ''], dtype=object)]
|
1,851 |
astro-ph/9703001
| null |
Ruth Durrer
|
Signatures of Topological Defects in the Microwave Sky: An Introduction
|
LaTex file 18pages, 5 postscript figures Contribution to the
Proceedings of the conference on 'Topolocigal Defects in Cosmology' in Roma,
La Sapienza
| null | null | null |
astro-ph
| null |
An introduction to topological defects in cosmology is given. We discuss
their possible relevance for structure formation. Especial emphasis is given on
the signature of topological defects in the spectrum of anisotropies in the
cosmic microwave background. We present simple analytic estimates for the CMB
spectrum on large and intermediate scales and compare them with the
corresponding approximations for models where initial perturbations are
generated during an inflationary epoch.
|
[{'version': 'v1', 'created': 'Fri, 28 Feb 1997 09:40:01 GMT'}]
|
2007-05-23
|
[array(['Durrer', 'Ruth', ''], dtype=object)]
|
1,852 |
1007.4577
|
Juhani Riihentaus
|
Juhani Riihentaus
|
On an inequality related to the radial growth of quasinearly subharmonic
functions in locally uniformly homogeneous spaces
|
10 pages, conference talk at the International Conference on Complex
Analysis in Memory of A.A. Gol'dberg (1930-2008), Lviv, May 31 - June 5,
2010. Now a couple of details added in order to clarify and improve the
argument
|
Journal of Mathematical Sciences: Advances and Applications, 6,
No. 1 (2010), 17-40
| null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We begin by recalling the definition of nonnegative quasinearly subharmonic
functions on locally uniformly homogeneous spaces. Recall that these spaces and
this function class are rather general: among others subharmonic,
quasisubharmonic and nearly subharmonic functions on domains of Euclidean
spaces ${\mathbb{R}}^n$, $n\geq 2$, are included. The following result of
Gehring and Hallenbeck is classical: Every subharmonic function, defined and
${\mathcal{L}}^p$-integrable for some $p$, $0<p<+\infty$, on the unit disk
${\mathbb{D}}$ of the complex plane ${\mathbb{C}}$ is for almost all $\theta$
of the form $o((1-| z|)^{-1/p})$, uniformly as $z\to e^{i\theta}$ in any Stolz
domain. Recently both Pavlovi\'c and Riihentaus have given related and partly
more general results on domains of ${\mathbb{R}}^n$, $n\geq 2$. Now we extend
one of these results to quasinearly subharmonic functions on locally uniformly
homogeneous spaces.
|
[{'version': 'v1', 'created': 'Mon, 26 Jul 2010 21:29:17 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Sep 2010 16:56:33 GMT'}]
|
2011-01-28
|
[array(['Riihentaus', 'Juhani', ''], dtype=object)]
|
1,853 |
2212.07926
|
Christopher Hanusa
|
Christopher R. H. Hanusa
|
Encouraging student creativity in mathematics through 3D design and 3D
printing
|
27 pages, 42 figures. To appear in Proceedings of Symposia in Applied
Mathematics
| null | null | null |
math.HO
|
http://creativecommons.org/licenses/by/4.0/
|
This is a case study of teaching 3D design and 3D printing in a project-based
computing course for undergraduate math majors. This article discusses content
organization, implementation, project grading, and includes a personal
reflection. There is an emphasis on lessons learned and how to encourage
student creativity and artistic expression. An appendix details 3D design
techniques in Mathematica.
|
[{'version': 'v1', 'created': 'Thu, 15 Dec 2022 16:02:05 GMT'}]
|
2022-12-16
|
[array(['Hanusa', 'Christopher R. H.', ''], dtype=object)]
|
1,854 |
1812.09283
|
The ATLAS Collaboration
|
ATLAS Collaboration
|
Properties of $g\rightarrow b\bar{b}$ at small opening angles in $pp$
collisions with the ATLAS detector at $\sqrt{s}=13$ TeV
|
39 pages in total, author list starting page 23, 6 figures, 1 table,
submitted to PRD. All figures including auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-17
|
Phys. Rev. D 99, 052004 (2019)
|
10.1103/PhysRevD.99.052004
|
CERN-EP-2018-323
|
hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
The fragmentation of high-energy gluons at small opening angles is largely
unconstrained by present measurements. Gluon splitting to $b$-quark pairs is a
unique probe into the properties of gluon fragmentation because identified
$b$-tagged jets provide a proxy for the quark daughters of the initial gluon.
In this study, key differential distributions related to the $g\rightarrow
b\bar{b}$ process are measured using 33 fb$^{-1}$ of $\sqrt{s}=13$ TeV $pp$
collision data recorded by the ATLAS experiment at the LHC in 2016. Jets
constructed from charged-particle tracks, clustered with the anti-$k_t$ jet
algorithm with radius parameter $R = 0.2$, are used to probe angular scales
below the $R=0.4$ jet radius. The observables are unfolded to particle level in
order to facilitate direct comparisons with predictions from present and future
simulations. Multiple significant differences are observed between the data and
parton shower Monte Carlo predictions, providing input to improve these
predictions of the main source of background events in analyses involving
boosted Higgs bosons decaying into $b$-quarks.
|
[{'version': 'v1', 'created': 'Fri, 21 Dec 2018 17:46:39 GMT'}]
|
2019-03-27
|
[array(['ATLAS Collaboration', '', ''], dtype=object)]
|
1,855 |
1404.4250
|
Dmitry N. Kozlov
|
Dmitry N. Kozlov
|
Witness structures and immediate snapshot complexes
|
full paper version of the 1st part of the preprint arXiv:1402.4707;
to appear in DMTCS
|
Discrete Mathematics & Theoretical Computer Science, Vol. 19 no.
3, Distributed Computing and Networking (November 28, 2017) dmtcs:3122
|
10.23638/DMTCS-19-3-12
| null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we introduce and study a new family of combinatorial simplicial
complexes, which we call immediate snapshot complexes. Our construction and
terminology is strongly motivated by theoretical distributed computing, as
these complexes are combinatorial models of the standard protocol complexes
associated to immediate snapshot read/write shared memory communication model.
In order to define the immediate snapshot complexes we need a new combinatorial
object, which we call a witness structure. These objects are indexing the
simplices in the immediate snapshot complexes, while a special operation on
them, called ghosting, describes the combinatorics of taking simplicial
boundary. In general, we develop the theory of witness structures and use it to
prove several combinatorial as well as topological properties of the immediate
snapshot complexes.
|
[{'version': 'v1', 'created': 'Wed, 16 Apr 2014 14:06:12 GMT'}
{'version': 'v2', 'created': 'Mon, 30 Nov 2015 11:29:40 GMT'}
{'version': 'v3', 'created': 'Sun, 5 Feb 2017 08:39:38 GMT'}
{'version': 'v4', 'created': 'Fri, 24 Nov 2017 13:13:08 GMT'}]
|
2023-06-22
|
[array(['Kozlov', 'Dmitry N.', ''], dtype=object)]
|
1,856 |
hep-lat/9509095
|
Shailesh Chandrasekharan
|
Shailesh Chandrasekharan and Norman Christ
|
Dirac Spectrum, Axial Anomaly and the QCD Chiral Phase Transition
|
Contribution to Lattice 95. 8 pages. Latex source file Individual
figures available from [email protected] and also submitted seperately
as figures.uu as required!
|
Nucl.Phys.Proc.Suppl. 47 (1996) 527-534
|
10.1016/0920-5632(96)00115-6
|
CU-TP-711
|
hep-lat
| null |
The QCD phase transition is studied on $16^3$ and $32^3 \times 4$ lattices
both with and without quark loops. We introduce a new zero-flavor or quenched
species of quark $\zeta$ and study the resulting chiral condensate, $\azbz$ as
a function of the $\zeta$ mass, $m_\zeta$. By examining $\azbz$ for $10^{-10}
\le m_\zeta \le 10$ we gain considerable information about the spectrum of
Dirac eigenvalues. A comparison of $ma=0.01$ and 0.025 shows little dependence
of the Dirac spectrum on such a light, dynamical quark mass, after an overall
shift in $\beta$ is removed. The presence of sufficient small eigenvalues to
support anomalous chiral symmetry breaking in the high temperature phase is
examined quantitatively. In an effort to enhance these small eigenvalues,
$\azbz$ is also examined in the pure gauge theory in the region of the
deconfinement transition with unexpected results. Above the critical
temperature, the three $Z_3$ phases show dramatically different chiral
behavior. Surprisingly, the real phase shows chiral symmetry, suggesting that a
system with one flavor of staggered fermion at $N_t=4$ will possess a chiral a
phase transition---behavior not expected in the continuum limit.
|
[{'version': 'v1', 'created': 'Fri, 29 Sep 1995 22:16:33 GMT'}
{'version': 'v2', 'created': 'Sun, 1 Oct 1995 23:00:40 GMT'}]
|
2009-10-28
|
[array(['Chandrasekharan', 'Shailesh', ''], dtype=object)
array(['Christ', 'Norman', ''], dtype=object)]
|
1,857 |
1905.10548
|
Zhenzhou Wang
|
Zhenzhou Wang
|
A New Clustering Method Based on Morphological Operations
| null | null | null | null |
cs.CV cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the booming development of data science, many clustering methods have
been proposed. All clustering methods have inherent merits and deficiencies.
Therefore, they are only capable of clustering some specific types of data
robustly. In addition, the accuracies of the clustering methods rely heavily on
the characteristics of the data. In this paper, we propose a new clustering
method based on the morphological operations. The morphological dilation is
used to connect the data points based on their adjacency and form different
connected domains. The iteration of the morphological dilation process stops
when the number of connected domains equals the number of the clusters or when
the maximum number of iteration is reached. The morphological dilation is then
used to label the connected domains. The Euclidean distance between each data
point and the points in each labeled connected domain is calculated. For each
data point, there is a labeled connected domain that contains a point that
yields the smallest Euclidean distance. The data point is assigned with the
same labeling number as the labeled connected domain. We evaluate and compare
the proposed method with state of the art clustering methods with different
types of data. Experimental results show that the proposed method is more
robust and generic for clustering two-dimensional or three-dimensional data.
|
[{'version': 'v1', 'created': 'Sat, 25 May 2019 07:40:41 GMT'}]
|
2019-05-28
|
[array(['Wang', 'Zhenzhou', ''], dtype=object)]
|
1,858 |
1409.6191
|
Miguel A. Dur\'an-Olivencia
|
Miguel A. Dur\'an-Olivencia and James F. Lutsko
|
Extending classical nucleation theory to confined systems
|
16 pages, 4 figures
|
Physical Review E, Volume 91, Pages 022402, 5 February 2015
|
10.1103/PhysRevE.91.022402
| null |
cond-mat.soft cond-mat.stat-mech physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Classical nucleation theory has been recently reformulated based on
fluctuating hydrodynamics [J.F. Lutsko and M.A. Dur\'{a}n-Olivencia, J. Chem.
Phys. 138, 244908 (2013)]. The present work extends this effort to the case of
nucleation in confined systems such as small pores and vesicles. The finite
available mass imposes a maximal supercritical cluster size and prohibits
nucleation altogether if the system is too small. We quantity the effect of
system size on the nuceation rate. We also discuss the effect of relaxing the
capillary-model assumption of zero interfacial width resulting in significant
changes in the nucleation barrier and nucleation rate.
|
[{'version': 'v1', 'created': 'Mon, 22 Sep 2014 14:49:21 GMT'}]
|
2015-02-20
|
[array(['Durán-Olivencia', 'Miguel A.', ''], dtype=object)
array(['Lutsko', 'James F.', ''], dtype=object)]
|
1,859 |
2112.08579
|
Haemin Lee
|
Haemin Lee, Hyunhee Cho, Soyi Jung, Joongheon Kim
|
The Credibility Cryptocurrency Valuation: Statistical Learning Analysis
for Influencer Tweets
| null | null | null | null |
cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cryptocurrency has attracted significant attention. Considering the number of
individuals investing in bitcoin, their motivations are comparatively less
clear than traditional investment decisions. As of December 2020, the market
has continuously increased in cryptocurrency. Especially, the spike of joke
Dogecoin shows the weirdness of the modern meme economy with the support of
Elon Musk, whom himself appointed as "Dogefather". In this paper, we analysis
the impact of tweets by Elon musk and present some statistical analyze with
event study.
|
[{'version': 'v1', 'created': 'Thu, 16 Dec 2021 02:42:23 GMT'}]
|
2021-12-17
|
[array(['Lee', 'Haemin', ''], dtype=object)
array(['Cho', 'Hyunhee', ''], dtype=object)
array(['Jung', 'Soyi', ''], dtype=object)
array(['Kim', 'Joongheon', ''], dtype=object)]
|
1,860 |
2106.13132
|
Wilf A. Wilson
|
Christopher Jefferson, Markus Pfeiffer, Rebecca Waldecker, Wilf A.
Wilson
|
Permutation group algorithms based on directed graphs
|
Shorter and reworked version of arXiv:1911.04783; accepted for
publication in Journal of Algebra; 35 pages, 9 figures, 4 tables
| null | null | null |
math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a new framework for solving an important class of computational
problems involving finite permutation groups, which includes calculating set
stabilisers, intersections of subgroups, and isomorphisms of combinatorial
structures. Our techniques are inspired by and generalise 'partition
backtrack', which is the current state-of-the-art algorithm introduced by
Jeffrey Leon in 1991. But, instead of ordered partitions, we use labelled
directed graphs to organise our backtrack search algorithms, which allows for a
richer representation of many problems while often resulting in smaller search
spaces. In this article we present the theory underpinning our framework, we
describe our algorithms, and we show the results of some experiments. An
implementation of our algorithms is available as free software in the
GraphBacktracking package for GAP.
|
[{'version': 'v1', 'created': 'Thu, 24 Jun 2021 16:05:33 GMT'}]
|
2021-06-25
|
[array(['Jefferson', 'Christopher', ''], dtype=object)
array(['Pfeiffer', 'Markus', ''], dtype=object)
array(['Waldecker', 'Rebecca', ''], dtype=object)
array(['Wilson', 'Wilf A.', ''], dtype=object)]
|
1,861 |
1805.12454
|
Dario Spirito
|
Carmelo A. Finocchiaro, Marco Fontana and Dario Spirito
|
The upper Vietoris topology on the space of inverse-closed subsets of a
spectral space and applications
|
to apper in the Rocky Mountain J. Math
| null | null | null |
math.GN math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given an arbitrary spectral space $X$, we consider the set
${\boldsymbol{\mathcal{X}}}(X)$ of all nonempty subsets of $X$ that are closed
with respect to the inverse topology. We introduce a Zariski-like topology on
${\boldsymbol{\mathcal{X}}}(X)$ and, after observing that it coincides the
upper Vietoris topology, we prove that ${\boldsymbol{\mathcal{X}}}(X)$ is
itself a spectral space, that this construction is functorial, and that
${\boldsymbol{\mathcal{X}}}(X)$ provides an extension of $X$ in a more
`complete' spectral space. Among the applications, we show that, starting from
an integral domain $D$, ${\boldsymbol{\mathcal{X}}}(\mathrm{Spec}(D))$ is
homeomorphic to the (spectral) space of all the stable semistar operations of
finite type on $D$.
|
[{'version': 'v1', 'created': 'Thu, 31 May 2018 13:16:31 GMT'}]
|
2018-06-01
|
[array(['Finocchiaro', 'Carmelo A.', ''], dtype=object)
array(['Fontana', 'Marco', ''], dtype=object)
array(['Spirito', 'Dario', ''], dtype=object)]
|
1,862 |
2201.05712
|
Hristos Tyralis
|
Hristos Tyralis, Georgia Papacharalampous, Sina Khatami
|
Expectile-based hydrological modelling for uncertainty estimation: Life
after mean
|
23 pages, 7 figures
|
Journal of Hydrology 617(Part B) (2023) 128986
|
10.1016/j.jhydrol.2022.128986
| null |
stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
Predictions of hydrological models should be probabilistic in nature. Our aim
is to introduce a method that estimates directly the uncertainty of
hydrological simulations using expectiles, thus complementing previous
quantile-based direct approaches as well as generalizing mean-based approaches.
Expectiles are new risk measures in hydrology. Compared to quantiles that use
information of the frequency of process realizations over a specified value,
expectiles use additional information of the magnitude of the exceedances over
the specified value. Expectiles are least square analogues of quantiles and can
characterize the probability distribution in much the same way as quantiles do.
Moreover, the mean of the probability distribution is the special case of the
expectile at level 0.5. To this end, we propose calibrating hydrological models
using the expectile loss function, which is strictly consistent for expectiles.
We apply our method to 511 basins in contiguous US and deliver predictive
expectiles of hydrological simulations with the GR4J, GR5J and GR6J
hydrological models at expectile levels 0.5, 0.9, 0.95 and 0.975. An honest
assessment empirically proves that the GR6J model outperforms the other two
models at all expectile levels. Great opportunities are offered for moving
beyond the mean in hydrological modelling by simply adjusting the objective
function.
|
[{'version': 'v1', 'created': 'Fri, 14 Jan 2022 23:36:38 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Dec 2022 20:00:56 GMT'}]
|
2022-12-23
|
[array(['Tyralis', 'Hristos', ''], dtype=object)
array(['Papacharalampous', 'Georgia', ''], dtype=object)
array(['Khatami', 'Sina', ''], dtype=object)]
|
1,863 |
math/9902164
|
Alice Silverberg
|
Alice Silverberg, Yuri G. Zarhin
|
Polarizations on abelian varieties and self-dual ell-adic
representations of inertia groups
| null | null | null |
ANT-0171
|
math.NT
| null |
It is well-known that every finite subgroup of GL_d(Q_{\ell}) is conjugate to
a subgroup of GL_d(Z_{\ell}). However, this does not remain true if we replace
general linear groups by symplectic groups. We say that G is a group of inertia
type if G is a finite group which has a normal Sylow-p-subgroup with cyclic
quotient. We show that if \ell>d+1, and G is a subgroup of Sp_{2d}(Q_{\ell}) of
inertia type, then G is conjugate in GL_{2d}(Q_{\ell}) to a subgroup of
\Sp_{2d}(Z_{\ell}). Despite the fact that G can fail to be conjugate in
\GL_{2d}(Q_\ell) to a subgroup of \Sp_{2d}(Z_\ell), we prove that it can
nevertheless be embedded in \Sp_{2d}(F_\ell) in such a way that the
characteristic polynomials are preserved (mod \ell), as long as \ell>3. The
latter result holds for arbitrary finite groups, not necessarily of inertia
type, and holds also for symmetric forms, not just alternating forms. We give
examples which show that the bounds are sharp. We apply these results to
construct, for every odd prime \ell, isogeny classes of abelian varieties all
of whose polarizations have degree divisible by \ell.
This paper is a revised version of ANT-0151, titled `Self-dual ell-adic
representations of finite groups'.
|
[{'version': 'v1', 'created': 'Fri, 26 Feb 1999 00:00:00 GMT'}]
|
2007-05-23
|
[array(['Silverberg', 'Alice', ''], dtype=object)
array(['Zarhin', 'Yuri G.', ''], dtype=object)]
|
1,864 |
2304.06088
|
Junggi Yoon
|
Euihun Joung, Prithvi Narayan, Junggi Yoon
|
Gravitational Edge Mode in Asymptotically AdS$_2$: JT Gravity Revisited
|
32 pages, 6 figures; v2: typos corrected, references added
| null | null | null |
hep-th cond-mat.str-el gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the gravitational edge mode of the Jackiw-Teitelboim (JT) gravity
and the constrained $sl(2,\mathbb{R})$ BF theory for the asymptotically
AdS$_2$. We revisit the derivation of the Schwarzian theory from the wiggling
boundary as an action for the gravitational edge mode. We present an
alternative description for the gravitational edge mode from the metric
fluctuation with the fixed boundary, which is also known as the would-be gauge
mode in the gravity. We clarify the relation between the wiggling boundary and
the would-be gauge mode. We demonstrate a natural top-down derivation of
$PSL(2,\mathbb{R})$ gauging and the path integral measure of the Schwarzian
theory. In the constrained $sl(2,\mathbb{R})$ BF theory, we develop a method
for incorporating the gravitational edge mode in the BF theory. In this BF
theory coupled to the edge mode, we derive the Schwarzian theory with
$PSL(2,\mathbb{R})$ gauging. We show that the Haar measure for the Iwasawa
decomposition of $PSL(2,\mathbb{R})$ leads to the path integral measure.
|
[{'version': 'v1', 'created': 'Wed, 12 Apr 2023 18:10:25 GMT'}
{'version': 'v2', 'created': 'Thu, 4 May 2023 07:35:23 GMT'}]
|
2023-05-05
|
[array(['Joung', 'Euihun', ''], dtype=object)
array(['Narayan', 'Prithvi', ''], dtype=object)
array(['Yoon', 'Junggi', ''], dtype=object)]
|
1,865 |
2112.03161
|
The CMS Collaboration
|
CMS Collaboration
|
Search for heavy resonances decaying to a pair of Lorentz-boosted Higgs
bosons in final states with leptons and a bottom quark pair at $\sqrt{s} =$
13 TeV
|
Replaced with the published version. Added the journal reference and
the DOI. All the figures and tables can be found at
http://cms-results.web.cern.ch/cms-results/public-results/publications/B2G-20-007
(CMS Public Pages)
|
JHEP 05 (2022) 005
|
10.1007/JHEP05(2022)005
|
CMS-B2G-20-007, CERN-EP-2021-226
|
hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
A search for new heavy resonances decaying to a pair of Higgs bosons (HH) in
proton-proton collisions at a center-of-mass energy of 13 TeV is presented.
Data were collected with the CMS detector at the LHC in 2016-2018,
corresponding to an integrated luminosity of 138 fb$^{-1}$. Resonances with a
mass between 0.8 and 4.5 TeV are considered using events in which one Higgs
boson decays into a bottom quark pair and the other into final states with
either one or two charged leptons. Specifically, the single-lepton decay
channel HH $\to$ $\mathrm{b\bar{b}}$WW$^*$ $\to$ $\mathrm{b\bar{b}}\ell\nu
q\bar{q}'$ and the dilepton decay channels HH $\to$ $\mathrm{b\bar{b}}$WW$^*$
$\to$ $\mathrm{b\bar{b}}\ell\nu \ell\nu$ and HH $\to$
$\mathrm{b\bar{b}}\tau\tau$ $\to$ $\mathrm{b\bar{b}}\ell\nu\nu \ell\nu\nu$ are
examined, where $\ell$ in the final state corresponds to an electron or muon.
The signal is extracted using a two-dimensional maximum likelihood fit of the H
$\to$ $\mathrm{b\bar{b}}$ jet mass and HH invariant mass distributions. No
significant excess above the standard model expectation is observed in data.
Model-independent exclusion limits are placed on the product of the cross
section and branching fraction for narrow spin-0 and spin-2 massive bosons
decaying to HH. The results are also interpreted in the context of radion and
bulk graviton production in models with a warped extra spatial dimension. The
results provide the most stringent limits to date for X $\to$ HH signatures
with final-state leptons and at some masses provide the most sensitive limits
of all X $\to$ HH searches.
|
[{'version': 'v1', 'created': 'Mon, 6 Dec 2021 16:51:06 GMT'}
{'version': 'v2', 'created': 'Sat, 14 May 2022 11:26:34 GMT'}]
|
2022-05-17
|
[array(['CMS Collaboration', '', ''], dtype=object)]
|
1,866 |
2304.05946
|
Daniel Manzano
|
Julio Ure\~na, Antonio Sojo, Juani Bermejo, and Daniel Manzano
|
Entanglement detection with classical deep neural networks
|
16 pages, comments are welcome
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this study, we introduce an autonomous method for addressing the detection
and classification of quantum entanglement, a core element of quantum mechanics
that has yet to be fully understood. We employ a multi-layer perceptron to
effectively identify entanglement in both two- and three-qubit systems. Our
technique yields impressive detection results, achieving nearly perfect
accuracy for two-qubit systems and over $90\%$ accuracy for three-qubit
systems. Additionally, our approach successfully categorizes three-qubit
entangled states into distinct groups with a success rate of up to $77\%$.
These findings indicate the potential for our method to be applied to larger
systems, paving the way for advancements in quantum information processing
applications.
|
[{'version': 'v1', 'created': 'Wed, 12 Apr 2023 16:14:18 GMT'}]
|
2023-04-13
|
[array(['Ureña', 'Julio', ''], dtype=object)
array(['Sojo', 'Antonio', ''], dtype=object)
array(['Bermejo', 'Juani', ''], dtype=object)
array(['Manzano', 'Daniel', ''], dtype=object)]
|
1,867 |
gr-qc/9412043
|
Imtjj51
|
J.Julve, A.L\'opez--Pinto, A.Tiemblo and R.Tresguerres
|
Nonlinear Gauge Realization of Spacetime Symmetries Including
Translations
|
10 pages, plainTeX
| null | null |
IMAFF 94/2
|
gr-qc
| null |
We present a general scheme for the nonlinear gauge realizations of spacetime
groups on coset spaces of the groups considered. In order to show the relevance
of the method for the rigorous treatment of the translations in gravitational
gauge theories, we apply it in particular to the affine group. This is an
illustration of the family of spacetime symmetries having the form of a
semidirect product $H\semidirect T$, where $H$ is the stability subgroup and
$T$ are the translations . The translational component of the connection
behaves like a true tensor under $H$ when coset realizations are involved.
|
[{'version': 'v1', 'created': 'Thu, 15 Dec 1994 16:17:34 GMT'}]
|
2007-05-23
|
[array(['Julve', 'J.', ''], dtype=object)
array(['López--Pinto', 'A.', ''], dtype=object)
array(['Tiemblo', 'A.', ''], dtype=object)
array(['Tresguerres', 'R.', ''], dtype=object)]
|
1,868 |
1304.2239
|
Jerzy Dajka
|
Jerzy Dajka, Jerzy Luczka
|
Trace distance and linear entropy of qubit states: Role of initial
qubit-environment correlations
| null |
Rep. Math. Phys. 70, 193 (2012)
|
10.1016/S0034-4877(12)60039-1
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The role of initial qubit-environment correlations on trace distance between
two qubit states is studied in the framework of non--Markovian pure dephasing.
The growth of mixedness of reduced state quantified by linear entropy is shown
to be related to the degree of initial qubit--environment correlations.
|
[{'version': 'v1', 'created': 'Mon, 8 Apr 2013 15:36:22 GMT'}]
|
2015-06-15
|
[array(['Dajka', 'Jerzy', ''], dtype=object)
array(['Luczka', 'Jerzy', ''], dtype=object)]
|
1,869 |
2202.01238
|
Chuan Chen
|
Chuan Chen, Peng Rao, Inti Sodemann
|
Berry Phases of Vison Transport in $\mathbb{Z}_2$ Topologically Ordered
States from Exact Fermion-Flux Lattice Dualities
|
9+16 pages, 3+8 figures
|
Phys. Rev. Research 4, 043003 (2022)
|
10.1103/PhysRevResearch.4.043003
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop an exact map of all states and operators from 2D lattices of
spins-$1/2$ into lattices of fermions and bosons with mutual semionic
statistical interaction that goes beyond previous dualities of $\mathbb{Z}_2$
lattice gauge theories because it does not rely on imposing local conservation
laws and captures the motion of ``charges'' and ``fluxes'' on equal footing.
This map allows to explicitly compute the Berry phases for the transport of
fluxes in a large class of symmetry enriched topologically ordered states with
emergent $\mathbb{Z}_2$ gauge fields that includes chiral, non-chiral, abelian
or non-abelian, that can be perturbatively connected to models where the visons
are static and the emergent fermionic spinons have a non-interacting
dispersion. The numerical complexity of computing such vison phases reduces
therefore to computing overlaps of ground states of free-fermion Hamiltonians.
Among other results, we establish numerically the conditions under which the
Majorana-carrying flux excitation in Ising-Topologically-Ordered states
enriched by translations acquires $0$ or $\pi$ phase when moving around a
single plaquette.
|
[{'version': 'v1', 'created': 'Wed, 2 Feb 2022 19:00:07 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Oct 2022 03:20:58 GMT'}]
|
2022-10-12
|
[array(['Chen', 'Chuan', ''], dtype=object)
array(['Rao', 'Peng', ''], dtype=object)
array(['Sodemann', 'Inti', ''], dtype=object)]
|
1,870 |
2302.00435
|
Zhijie Fan
|
Zhijie Fan and Guixiang Hong and Liang Wang
|
Sharp endpoint $L_p$ estimates of quantum Schr\"{o}dinger groups
|
50 pages
| null | null | null |
math.AP
|
http://creativecommons.org/licenses/by/4.0/
|
In this article, we establish sharp endpoint $L_p$ estimates of Schr\"odinger
groups on general measure spaces which may not be equipped with good metrics
but admit submarkovian semigroups satisfying purely algebraic assumptions. One
of the key ingredients of our proof is to introduce and investigate a new
noncommutative high-cancellation BMO space by constructing an abstract form of
P-metric codifying some sort of underlying metric and position. This provides
the first form of Schr\"odinger group theory on arbitrary von Neumann algebras
and can be applied to many models, including Schr\"odinger groups associated
with non-negative self-adjoint operators satisfying purely Gaussian upper
bounds on doubling metric spaces, standard Schr\"odinger groups on quantum
Euclidean spaces, matrix algebras and group von Neumann algebras with finite
dimensional cocycles.
|
[{'version': 'v1', 'created': 'Wed, 1 Feb 2023 13:28:33 GMT'}]
|
2023-02-02
|
[array(['Fan', 'Zhijie', ''], dtype=object)
array(['Hong', 'Guixiang', ''], dtype=object)
array(['Wang', 'Liang', ''], dtype=object)]
|
1,871 |
0907.3883
|
Tomi Koivisto
|
Tomi S. Koivisto and Nelson J. Nunes
|
Three-form cosmology
|
6 pages, 2 figures; V2: typos corrected, refs added, to appear in PLB
| null |
10.1016/j.physletb.2010.01.051
| null |
astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cosmology of self-interacting three-forms is investigated. The minimally
coupled canonical theory can naturally generate a variety of isotropic
background dynamics, including scaling, possibly transient acceleration and
phantom crossing. An intuitive picture of the cosmological dynamics is
presented employing an effective potential. Numerical solutions and analytical
approximations are provided for scenarios which are potentially important for
inflation or dark energy.
|
[{'version': 'v1', 'created': 'Wed, 22 Jul 2009 16:59:00 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Jan 2010 00:09:35 GMT'}]
|
2015-05-13
|
[array(['Koivisto', 'Tomi S.', ''], dtype=object)
array(['Nunes', 'Nelson J.', ''], dtype=object)]
|
1,872 |
1207.0317
|
S\'ebastien Renaux-Petel
|
Liam McAllister, S\'ebastien Renaux-Petel, Gang Xu
|
A Statistical Approach to Multifield Inflation: Many-field Perturbations
Beyond Slow Roll
|
39 pages, 17 figures. References added. Matches version published in
JCAP
| null |
10.1088/1475-7516/2012/10/046
| null |
astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study multifield contributions to the scalar power spectrum in an ensemble
of six-field inflationary models obtained in string theory. We identify
examples in which inflation occurs by chance, near an approximate inflection
point, and we compute the primordial perturbations numerically, both exactly
and using an array of truncated models. The scalar mass spectrum and the number
of fluctuating fields are accurately described by a simple random matrix model.
During the approach to the inflection point, bending trajectories and
violations of slow roll are commonplace, and 'many-field' effects, in which
three or more fields influence the perturbations, are often important. However,
in a large fraction of models consistent with constraints on the tilt the
signatures of multifield evolution occur on unobservably large scales. Our
scenario is a concrete microphysical realization of quasi-single-field
inflation, with scalar masses of order $H$, but the cubic and quartic couplings
are typically too small to produce detectable non-Gaussianity. We argue that
our results are characteristic of a broader class of models arising from
multifield potentials that are natural in the Wilsonian sense.
|
[{'version': 'v1', 'created': 'Mon, 2 Jul 2012 09:36:59 GMT'}
{'version': 'v2', 'created': 'Tue, 2 Oct 2012 12:11:46 GMT'}]
|
2015-06-05
|
[array(['McAllister', 'Liam', ''], dtype=object)
array(['Renaux-Petel', 'Sébastien', ''], dtype=object)
array(['Xu', 'Gang', ''], dtype=object)]
|
1,873 |
1008.4960
|
Carl H. Gibson
|
Rajkumar Gangappa (Univ. of Glamorgan UK) Chandra Wickramasinghe
(Cardiff Univ. UK), Milton Wainwright (Univ. Sheffield UK), A. Santhosh Kumar
(Cochin University India) and Godfrey Louis (Cochin University India)
|
Growth and replication of red rain cells at 121 oC and their red
fluorescence
|
11 pages 10 figures SPIE Conference 7819 Instruments, Methods, and
Missions for Astrobiology XIII Aug. 3-5 2010 San Diego, Ed. Richard B. Hoover
| null |
10.1117/12.876393
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have shown that the red cells found in the Red Rain (which fell on Kerala,
India, in 2001) survive and grow after incubation for periods of up to two
hours at 121 oC . Under these conditions daughter cells appear within the
original mother cells and the number of cells in the samples increases with
length of exposure to 121 oC. No such increase in cells occurs at room
temperature, suggesting that the increase in daughter cells is brought about by
exposure of the Red Rain cells to high temperatures. This is an independent
confirmation of results reported earlier by two of the present authors,
claiming that the cells can replicate under high pressure at temperatures up to
300 oC. The flourescence behaviour of the red cells is shown to be in
remarkable correspondence with the extended red emission observed in the Red
Rectangle planetary nebula and other galactic and extragalactic dust clouds,
suggesting, though not proving, an extraterrestrial origin.
|
[{'version': 'v1', 'created': 'Sun, 29 Aug 2010 21:13:19 GMT'}]
|
2015-05-19
|
[array(['Gangappa', 'Rajkumar', '', 'Univ. of Glamorgan UK'], dtype=object)
array(['Wickramasinghe', 'Chandra', '', 'Cardiff Univ. UK'], dtype=object)
array(['Wainwright', 'Milton', '', 'Univ. Sheffield UK'], dtype=object)
array(['Kumar', 'A. Santhosh', '', 'Cochin University India'],
dtype=object)
array(['Louis', 'Godfrey', '', 'Cochin University India'], dtype=object)]
|
1,874 |
1210.2016
|
Ze-Chun Hu
|
Ze-Chun Hu, Wei Sun and Jing Zhang
|
New results on Hunt's hypothesis (H) for L\'{e}vy processes
|
24 pages
|
Potential Analysis, 42, 585-605, 2015
|
10.1007/s11118-014-9446-1
| null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we present new results on Hunt's hypothesis (H) for L\'{e}vy
processes. We start with a comparison result on L\'{e}vy processes which
implies that big jumps have no effect on the validity of (H). Based on this
result and the Kanda-Forst-Rao theorem, we give examples of subordinators
satisfying (H). Afterwards we give a new necessary and sufficient condition for
(H) and obtain an extended Kanda-Forst-Rao theorem. By virtue of this theorem,
we give a new class of L\'{e}vy processes satisfying (H). Finally, we construct
a type of subordinators that does not satisfy Rao's condition.
|
[{'version': 'v1', 'created': 'Sun, 7 Oct 2012 02:35:17 GMT'}
{'version': 'v2', 'created': 'Sat, 6 Jul 2013 06:36:41 GMT'}
{'version': 'v3', 'created': 'Tue, 15 Apr 2014 02:34:00 GMT'}]
|
2015-03-03
|
[array(['Hu', 'Ze-Chun', ''], dtype=object)
array(['Sun', 'Wei', ''], dtype=object)
array(['Zhang', 'Jing', ''], dtype=object)]
|
1,875 |
1003.2271
|
Annica Black-Schaffer
|
Annica M. Black-Schaffer
|
The importance of electron-electron interactions in the RKKY coupling in
graphene
|
4 pages, 3 figures
|
Phys. Rev. B 82, 073409 (2010)
|
10.1103/PhysRevB.82.073409
| null |
cond-mat.str-el cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that the carrier-mediated exchange interaction, the so-called RKKY
coupling, between two magnetic impurity moments in graphene is significantly
modified in the presence of electron-electron interactions. Using the
mean-field approximation of the Hubbard-$U$ model we show that the
$(1+\cos(2{\bf k}_D\cdot {\bf R})$-oscillations present in the bulk for
non-interacting electrons disappear and the power-law decay becomes more long
ranged with increasing electron interactions. In zigzag graphene nanoribbons
the effects are even larger with any finite $U$ rendering the long-distance
RKKY coupling distance independent. Comparing our mean-field results with
first-principles results we also extract a surprisingly large value of $U$
indicating that graphene is very close to an antiferromagnetic instability.
|
[{'version': 'v1', 'created': 'Thu, 11 Mar 2010 08:15:19 GMT'}]
|
2013-05-29
|
[array(['Black-Schaffer', 'Annica M.', ''], dtype=object)]
|
1,876 |
1812.05238
|
Nitin Samarth
|
Di Xiao, Lun-Hui Hu, Chao-Xing Liu, Nitin Samarth
|
Anomalous Quantum Oscillations of Interacting Electron-hole Gases in
Inverted Type-II InAs/GaSb Quantum Wells
| null |
Phys. Rev. Lett. 122, 186802 (2019)
|
10.1103/PhysRevLett.122.186802
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report magneto-transport studies of InAs/GaSb bilayer quantum wells in a
regime where the interlayer tunneling between the electron and hole gases is
suppressed. When the chemical potential is tuned close to the charge neutrality
point, we observe anomalous quantum oscillations that are inversely periodic in
magnetic field and that have an extremely high frequency despite the highly
insulating regime where they are observed. The seemingly contradictory
coexistence of a high sheet resistance and high frequency quantum oscillations
in the charge neutrality regime cannot be understood within the single-particle
picture. We propose an interpretation that attributes our experimental
observation to the Coulomb drag between the electron and hole gases, thus
providing strong evidence of the significance of Coulomb interaction in this
topological insulator.
|
[{'version': 'v1', 'created': 'Thu, 13 Dec 2018 02:49:52 GMT'}]
|
2019-05-15
|
[array(['Xiao', 'Di', ''], dtype=object)
array(['Hu', 'Lun-Hui', ''], dtype=object)
array(['Liu', 'Chao-Xing', ''], dtype=object)
array(['Samarth', 'Nitin', ''], dtype=object)]
|
1,877 |
2106.08824
|
Lars Bojer Madsen
|
Lars Bojer Madsen
|
Strong-field approximation for high-harmonic generation in infrared
laser pulses in the accelerated Kramers-Henneberger frame
|
10 pages, 5 figures
|
Phys. Rev. A 104, 033117 (2021)
|
10.1103/PhysRevA.104.033117
| null |
quant-ph physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The strong-field approximation for high-harmonic generation in near-infrared
and infrared laser pulses is formulated in the accelerated Kramers-Henneberger
frame. The accompanying physical picture is discussed and the nature of the
leading-order term is contrasted with that of the three-step model following
the strong-field-approximation formulation in the length or velocity gauges.
The theory is illustrated by high-harmonic generation spectra for atomic
hydrogen.
|
[{'version': 'v1', 'created': 'Wed, 16 Jun 2021 14:40:04 GMT'}]
|
2021-10-04
|
[array(['Madsen', 'Lars Bojer', ''], dtype=object)]
|
1,878 |
hep-th/0610334
|
Valentin V. Khoze
|
Steven A. Abel, Chong-Sun Chu, Joerg Jaeckel, Valentin V. Khoze
|
SUSY breaking by a metastable ground state: Why the early Universe
preferred the non-supersymmetric vacuum
|
17 pages, 3 figures, v3: References added, minor corrections
|
JHEP 0701:089,2007
|
10.1088/1126-6708/2007/01/089
|
IPPP/06/76, DCPT/06/152
|
hep-th astro-ph hep-ph
| null |
Supersymmetry breaking in a metastable vacuum is re-examined in a
cosmological context. It is shown that thermal effects generically drive the
Universe to the metastable minimum even if it begins in the
supersymmetry-preserving one. This is a generic feature of the ISS models of
metastable supersymmetry breaking due to the fact that SUSY preserving vacua
contain fewer light degrees of freedom than the metastable ground state at the
origin. These models of metastable SUSY breaking are thus placed on an equal
footing with the more usual dynamical SUSY breaking scenarios.
|
[{'version': 'v1', 'created': 'Tue, 31 Oct 2006 19:33:29 GMT'}
{'version': 'v2', 'created': 'Fri, 17 Nov 2006 15:22:54 GMT'}
{'version': 'v3', 'created': 'Tue, 16 Jan 2007 11:35:38 GMT'}]
|
2009-11-11
|
[array(['Abel', 'Steven A.', ''], dtype=object)
array(['Chu', 'Chong-Sun', ''], dtype=object)
array(['Jaeckel', 'Joerg', ''], dtype=object)
array(['Khoze', 'Valentin V.', ''], dtype=object)]
|
1,879 |
1902.10307
|
Tyler Derr
|
Tyler Derr, Hamid Karimi, Xiaorui Liu, Jiejun Xu, Jiliang Tang
|
Deep Adversarial Network Alignment
| null | null | null | null |
cs.SI cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Network alignment, in general, seeks to discover the hidden underlying
correspondence between nodes across two (or more) networks when given their
network structure. However, most existing network alignment methods have added
assumptions of additional constraints to guide the alignment, such as having a
set of seed node-node correspondences across the networks or the existence of
side-information. Instead, we seek to develop a general network alignment
algorithm that makes no additional assumptions. Recently, network embedding has
proven effective in many network analysis tasks, but embeddings of different
networks are not aligned. Thus, we present our Deep Adversarial Network
Alignment (DANA) framework that first uses deep adversarial learning to
discover complex mappings for aligning the embedding distributions of the two
networks. Then, using our learned mapping functions, DANA performs an efficient
nearest neighbor node alignment. We perform experiments on real world datasets
to show the effectiveness of our framework for first aligning the graph
embedding distributions and then discovering node alignments that outperform
existing methods.
|
[{'version': 'v1', 'created': 'Wed, 27 Feb 2019 02:14:42 GMT'}]
|
2019-02-28
|
[array(['Derr', 'Tyler', ''], dtype=object)
array(['Karimi', 'Hamid', ''], dtype=object)
array(['Liu', 'Xiaorui', ''], dtype=object)
array(['Xu', 'Jiejun', ''], dtype=object)
array(['Tang', 'Jiliang', ''], dtype=object)]
|
1,880 |
cond-mat/9310077
|
Peter Li
|
Q. P. Li and X. C. Xie
|
Transport of one-dimensional interacting Fermions through a barrier
|
10 pages (6 figures, available upon request), REVTEX, UMD-93-10-9
| null |
10.1103/PhysRevB.49.8273
| null |
cond-mat
| null |
We study the transport properties of one-dimensional (1D) interacting
Fermions through a barrier by numerically calculating the Kohn charge stiffness
constant and the relative Drude weight. We find that the transport properties
of the 1D Hubbard model are quite different from those of the 1D spinless
Fermion model. For example, the presence of the attractive interaction between
electrons in the 1D Hubbard model actually {\em suppresses} the DC conductance,
while a small repulsive interaction {\em enhances} the DC conductance. These
results show that the spin degree of freedom plays an important role in the
transport properties of the 1D interacting Fermion systems.
|
[{'version': 'v1', 'created': 'Fri, 29 Oct 1993 19:50:16 GMT'}]
|
2009-10-22
|
[array(['Li', 'Q. P.', ''], dtype=object)
array(['Xie', 'X. C.', ''], dtype=object)]
|
1,881 |
patt-sol/9805003
|
Manfred Luecke
|
St. Hollinger, M. Luecke, and H. W. Mueller
|
Model for convection in binary liquids
|
16 two-column pages with 9 figures included
|
Phys. Rev. E 57, 4250 - 4264 (1998)
|
10.1103/PhysRevE.57.4250
| null |
patt-sol nlin.PS
| null |
A minimal, analytically manageable Galerkin type model for convection in
binary mixtures subject to realistic boundary conditions is presented. The
model elucidates and reproduces the typical bifurcation topology of extended
stationary and oscillatory convective states seen for negative Soret coupling:
backwards stationary and Hopf bifurcations, saddle node bifurcations to stable
strongly nonlinear stationary and traveling wave (TW) states, and merging of
the TW solution branch with stationary states. Also unstable standing wave
solutions are obtained. A systematic analysis of the concentration balance for
liquid mixture parameters has lead to a representation of the concentration
field in terms of two linear and two nonlinear modes. This truncation captures
the important large--scale effects in the laterally averaged concentration
field resulting from advective and diffusive mixing. Also the fact that with
increasing flow intensity along the TW solution branch the frequency decreases
monotonically in the same way as the mixing increases --- the variance of the
concentration distribution decreases --- is ensured and reproduced well.
Universal scaling relations between flow intensity, frequency, and variance of
the concentration distribution (degree of mixing) in a TW are predicted by the
model and have been confirmed by numerical solutions of the full equations. The
validity of the model is checked by comparison with numerical solutions of the
full field equations.
|
[{'version': 'v1', 'created': 'Tue, 12 May 1998 10:22:08 GMT'}]
|
2009-10-31
|
[array(['Hollinger', 'St.', ''], dtype=object)
array(['Luecke', 'M.', ''], dtype=object)
array(['Mueller', 'H. W.', ''], dtype=object)]
|
1,882 |
2112.01045
|
Akihiro Shibata
|
Akihiro Shibata, Seikou Kato, and Kei-Ichi Kondo
|
Magnetic monopole dominance for the Wilson loops in higher
representations
|
9 pages, 1 figure ; Presented at the 38th International Symposium on
Lattice Field Theory, LATTICE2021 26th-30th July, 2021. arXiv admin note:
text overlap with arXiv:1812.05827
| null | null |
KEK Preprint 2021-56, CHIBA-EP-252
|
hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The dual superconductor picture is one of the most promising scenarios for
quark confinement. To investigate this picture in a gauge-invariant manner, we
have proposed a new formulation of Yang-Mills theory, named the decomposition
method, on the lattice. The so-called restricted field obtained from the
gauge-covariant decomposition plays the dominant role in quark confinement. It
has been known by preceding works that the restricted-field dominance is not
observed for the Wilson loop in higher representations if the restricted part
of the Wilson loop is obtained by adopting the Abelian projection or the field
decomposition naively in the same way as done in the fundamental
representation. Recently, through the non-Abelian Stokes theorem (NAST) for the
Wilson loop operator, we have proposed suitable gauge-invariant operators
constructed from the restricted field to reproduce the correct behavior of the
original Wilson loop averages for higher representations. We have demonstrated
the numerical evidence for the restricted-field dominance in the string
tension.
In this talk, we focus on the magnetic monopole. According to this picture,
magnetic monopoles causing the dual superconductivity are the dominant degrees
of freedom responsible for confinement. With the help of the NAST, we define
the magnetic monopole and the string tension extracted from the
magnetic-monopole part of the Wilson loop in a gauge-invariant manner. We will
further perform lattice simulations to measure the static potential for quarks
in higher representations using the proposed operators and examine the magnetic
monopole dominance in the string tension, which means that the string tension
extracted from the magnetic-monopole part of the Wilson loop reproduces the
proper string tension obtained from the original Wilson loop.
|
[{'version': 'v1', 'created': 'Thu, 2 Dec 2021 08:15:04 GMT'}]
|
2021-12-03
|
[array(['Shibata', 'Akihiro', ''], dtype=object)
array(['Kato', 'Seikou', ''], dtype=object)
array(['Kondo', 'Kei-Ichi', ''], dtype=object)]
|
1,883 |
2202.11418
|
Bifeng Guo
|
Bifeng Guo, Qingyu Peng, Ying Chen, Zhongjie Zheng, Yijia Shang, Dan
Li, Xiao Chen
|
The Astrometric Performance Test of 80-cm Telescope at Yaoan Station and
Precise CCD Positions of Apophis
| null | null |
10.1088/1674-4527/ac5959
| null |
astro-ph.IM
|
http://creativecommons.org/licenses/by/4.0/
|
The 80-cm azimuthal telescope is newly mounted at Yaoan Station, Purple
Mountain Observatory in 2018. The astrometric performance of the telescope is
tested in the following three aspects. (a) The geometric distortion of its CCD
attached. It is stable in both a single epoch and multi epochs. Eight
distortion solutions are derived over about one year. The maximum values range
from 0.75 to 0.79 pixel and the median values range from 0.14 to 0.16 pixel.
(b) The limit magnitude of stars. About 20.5 magnitude (Gaia-G) stars can be
detected with Johnson-V filter exposured in 300 seconds. The astrometric error
of about 20.5 magnitude stars is estimated at 0.14 arcsec using the fitted
sigmoidal function. (c) The astrometric accuracy and the precision of stacked
fast-moving faint object. 24 stacked frames of the potentially hazardous
asteroid (PHA) (99942) Apophis are derived on April 14 and 15, 2021 (fainter
than 18 mag) based on the ephemeris shifts. During data reduction, the newest
Gaia EDR3 Catalog and Jet Propulsion Laboratory Horizons ephemeris are
referenced as theoretical positions of stars and Apophis, respectively. Our
results show that the mean (O-C)s (observed minus computed) of Apophis are
-0.018 and 0.020 arcsec in right ascention and declination, and the dispersions
are estimated at 0.094 and 0.085 arcsec, respectively, which show the
consistency of the stacked results by Astrometrica.
|
[{'version': 'v1', 'created': 'Wed, 23 Feb 2022 11:01:55 GMT'}]
|
2022-05-04
|
[array(['Guo', 'Bifeng', ''], dtype=object)
array(['Peng', 'Qingyu', ''], dtype=object)
array(['Chen', 'Ying', ''], dtype=object)
array(['Zheng', 'Zhongjie', ''], dtype=object)
array(['Shang', 'Yijia', ''], dtype=object)
array(['Li', 'Dan', ''], dtype=object)
array(['Chen', 'Xiao', ''], dtype=object)]
|
1,884 |
gr-qc/9906015
|
Thomas Buchert
|
Thomas Buchert
|
On average properties of inhomogeneous fluids in general relativity I:
dust cosmologies
|
TeX 19 pages, matches published version in G.R.G
|
Gen.Rel.Grav. 32 (2000) 105-125
|
10.1023/A:1001800617177
| null |
gr-qc astro-ph
| null |
For general relativistic spacetimes filled with irrotational `dust' a
generalized form of Friedmann's equations for an `effective' expansion factor
$a_D (t)$ of inhomogeneous cosmologies is derived. Contrary to the standard
Friedmann equations, which hold for homogeneous-isotropic cosmologies, the new
equations include the `backreaction effect' of inhomogeneities on the average
expansion of the model. A universal relation between `backreaction' and average
scalar curvature is also given. For cosmologies whose averaged spatial scalar
curvature is proportional to $a_D^{-2}$, the expansion law governing a generic
domain can be found. However, as the general equations show, `backreaction'
acts as to produce average curvature in the course of structure formation, even
when starting with space sections that are spatially flat on average.
|
[{'version': 'v1', 'created': 'Fri, 4 Jun 1999 12:50:15 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Dec 1999 12:14:13 GMT'}]
|
2015-06-25
|
[array(['Buchert', 'Thomas', ''], dtype=object)]
|
1,885 |
1405.1309
|
Luciana Dalla Valle PhD
|
Luciana Dalla Valle, Maria Elena De Giuli, Claudia Tarantola, Claudio
Manelli
|
Default Probability Estimation via Pair Copula Constructions
|
40 pages, 11 figures
| null | null | null |
q-fin.RM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we present a novel approach for firm default probability
estimation. The methodology is based on multivariate contingent claim analysis
and pair copula constructions. For each considered firm, balance sheet data are
used to assess the asset value, and to compute its default probability. The
asset pricing function is expressed via a pair copula construction, and it is
approximated via Monte Carlo simulations. The methodology is illustrated
through an application to the analysis of both operative and defaulted firms.
|
[{'version': 'v1', 'created': 'Tue, 6 May 2014 15:19:46 GMT'}
{'version': 'v2', 'created': 'Thu, 13 Nov 2014 10:21:30 GMT'}
{'version': 'v3', 'created': 'Fri, 21 Aug 2015 18:15:32 GMT'}]
|
2015-08-24
|
[array(['Valle', 'Luciana Dalla', ''], dtype=object)
array(['De Giuli', 'Maria Elena', ''], dtype=object)
array(['Tarantola', 'Claudia', ''], dtype=object)
array(['Manelli', 'Claudio', ''], dtype=object)]
|
1,886 |
2006.05198
|
Michael F. Sterzik
|
Michael F. Sterzik, Stefano Bagnulo, Claudia Emde and Mihail Manev
|
The cloudbow of planet Earth observed in polarisation
|
13 pages, 7 figures
|
A&A 639, A89 (2020)
|
10.1051/0004-6361/202038270
| null |
astro-ph.EP astro-ph.IM
|
http://creativecommons.org/licenses/by/4.0/
|
Scattering processes in the atmospheres of planets cause characteristic
features that can be particularly well observed in polarisation. For planet
Earth, both molecular and scattering by small particles imprint specific
signatures in its phase curve. An unequivocal prediction of a
liquid-water-loaded atmosphere is the existence of a rainbow feature at a
scattering angle of around 138-144deg. Earthshine allows us to observe the
primary rainbow in linear polarisation. We observed polarisation spectra of
Earthshine using FORS2 at the Very Large Telescope for phase angles from 33deg
to 65deg (Sun--Earth--Moon angle). The spectra were used to derive the degree
of polarisation in the B, V, R, and I passbands and the phase curve from 33deg
to 136deg . The new observations extend to the smallest phases that can be
observed from the ground. The degree of polarisation of planet Earth is
increasing for decreasing phase angles downwards of 45deg. From comparison of
the phase curve observed with models of an Earth-type atmosphere we are able to
determine the refractive index of water and to constrain the mean water droplet
sizes to 6-7 mum. Furthermore, we can retrieve the mean cloud fraction of
liquid water clouds to 0.3, and the mean optical depth of the water clouds to
values between 10 and 20. Our observations allow us to discern two
fundamentally different scattering mechanisms of the atmosphere of planet
Earth: molecular and particle scattering. The physical and chemical properties
can be retrieved with high fidelity through suitable inversion of the phase
curve. Observations of polarimetric phase curves of planets beyond the Solar
System shall be extremely valuable for a thorough characterisation of their
atmospheres.
|
[{'version': 'v1', 'created': 'Tue, 9 Jun 2020 11:48:12 GMT'}]
|
2020-07-15
|
[array(['Sterzik', 'Michael F.', ''], dtype=object)
array(['Bagnulo', 'Stefano', ''], dtype=object)
array(['Emde', 'Claudia', ''], dtype=object)
array(['Manev', 'Mihail', ''], dtype=object)]
|
1,887 |
2205.01288
|
Jia Tian
|
Cheng Peng, Jia Tian and Yingyu Yang
|
Half-Wormholes and Ensemble Averages
|
87 pages, version 2, refs added and minor changes
| null | null | null |
hep-th
|
http://creativecommons.org/licenses/by/4.0/
|
We study "half-wormhole-like" saddle point contributions to spectral
correlators in a variety of ensemble average models, including various
statistical models, generalized 0d SYK models, 1d Brownian SYK models and an
extension of it. In statistical ensemble models, where more general
distributions of the random variables could be studied in great details, we
find the accuracy of the previously proposed approximation for the
half-wormholes could be improved when the distribution of the random variables
deviate significantly from Gaussian distributions. We propose a modified
approximation scheme of the half-wormhole contributions that also work well in
these more general theories. In various generalized 0d SYK models we identify
new half-wormhole-like saddle point contributions. In the 0d SYK model and 1d
Brownian SYK model, apart from the wormhole and half-wormhole saddles, we find
new non-trivial saddles in the spectral correlators that would potentially give
contributions of the same order as the trivial self-averaging saddles. However
after a careful Lefschetz-thimble analysis we show that these non-trivial
saddles should not be included. We also clarify the difference between "linked
half-wormholes" and "unlinked half-wormholes" in some models.
|
[{'version': 'v1', 'created': 'Tue, 3 May 2022 03:46:29 GMT'}
{'version': 'v2', 'created': 'Fri, 6 May 2022 12:17:12 GMT'}]
|
2022-05-09
|
[array(['Peng', 'Cheng', ''], dtype=object)
array(['Tian', 'Jia', ''], dtype=object)
array(['Yang', 'Yingyu', ''], dtype=object)]
|
1,888 |
1306.0795
|
Baoshan Zhang
|
Baoshan Zhang
|
Matrix Online Characteristic Number and Its applications in Goldbach
Conjecture,Polignac Conjecture,the Twin Prime Conjecture
|
32 pages. Prime numbers,Matrix master characteristic number,Matrix
master characteristic sequence,Goldbach conjecture,Polignac conjecture,The
twin prime conjecture
| null | null | null |
math.GM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This article consists of three chapters.In Chapter 1, it is determined by the
consecutive odd numbers, and study to the intrinsic properties of a class of
matrix sequence. Through the establishment of matrix online number concept,
characteristics and the online number column use mathematical induction to
prove the some properties of this kind of matrix on the number of online
features (Theorem 1). Finally, it is given a trial to prove the Goldbach
conjecture (Theorem 6). This is the author in the years to explore prime
properties in the process of research and discovery, and believe that this
finding is of great significance.In Chapter 2, it is defined the concepts of
matrix master characteristic number and the Matrix Master Characteristic
Sequence (Definition 1). Firstly, we prove that any even number can be
expressed as for the difference of two odd prime numbers at least two groups
(Theorem 4). Secondly, we prove that there are infinitely many odd prime
numbers separated by four (Theorem 9). Finally, we prove that if there is
greater than 1 in the intersection by S(3) and s(2m+3) for any natural number
m, so that there are infinitely many odd prime numbers separated by
2m(Theorem11). The results will undoubtedly promote the research for Polignac
conjecture.In Chapter 3, mainly as a result of any odd natural number a, the
intersection by S(a) and s(a+2) is not empty number set, and there are far more
than 1 number in the set, where S(a)={k,If 2k+a be prime as k be natural
number},and P is a prime number set, N is natural number set. we prove that
there are an infinite number of twin prime, and then solve the problem of the
twin primes in number theory.
|
[{'version': 'v1', 'created': 'Tue, 4 Jun 2013 14:04:33 GMT'}
{'version': 'v2', 'created': 'Tue, 11 Jun 2013 22:20:30 GMT'}]
|
2013-06-13
|
[array(['Zhang', 'Baoshan', ''], dtype=object)]
|
1,889 |
1904.05646
|
Antonio Sollima
|
A. Sollima
|
The stellar Initial Mass Function of the solar neighbourhood revealed by
Gaia
|
20 pages, 12 figures, accepted for publication by MNRAS
| null |
10.1093/mnras/stz2093
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
I use a sample of more than 120,000 stars in the solar neighbourhood with
parallaxes, magnitudes and colours estimated with unprecedented accuracy by the
second data release of the Gaia mission to derive the initial mass function of
the Galactic disc. A full-forward technique is used to take into account for
the population of unresolved binaries, the metallicity distribution, the star
formation history and their variation across the Galactic disk as well as all
the observational effects. The shape of the initial mass function is well
represented by a segmented power-law with two breaks at characteristic masses.
It has a maximum at M~0.15 Ms with significant flattening (possibly a
depletion) at lower masses and a slope of alpha=-1.34 +/- 0.07 in the range
0.25<M/Ms<1. Above 1 Ms the IMF shows an abrupt decline with a slope ranging
from alpha=-2.68 +/- 0.09 to alpha=-2.41 +/- 0.11 depending on the adopted
resolution of the star formation history.
|
[{'version': 'v1', 'created': 'Thu, 11 Apr 2019 11:54:29 GMT'}
{'version': 'v2', 'created': 'Fri, 26 Jul 2019 16:53:07 GMT'}]
|
2019-09-25
|
[array(['Sollima', 'A.', ''], dtype=object)]
|
1,890 |
hep-ph/9610320
|
Paul Frampton
|
P. H. Frampton
|
Lecture on a Z' Coupled to Beauty and Truth
|
12 pages, latex including 3 Figures. Lecture at Ettore Majorana
International School of Subnuclear Physics, Erice, Sicily, July 1996. This
lecture is an updated version of hep-ph/9604260 by P.H.Frampton, M.B. Wise
and B.D. Wright. Sections in italics, and the Figures, explain how this same
model-building strategy (with different details) can accommodate different
data on $R_b$ and $A^b$
| null | null |
IFP-727-UNC.
|
hep-ph
| null |
By extending the standard gauge group to $SU(3)_c \times SU(2)_L \times
U(1)_Y \times U(1)_X$ with $X$ charges carried only by the third family we
accommodate the LEP measurement of $R_b$ and predict a potentially measurable
discrepancy in $A_{FB}^{b}$ in $e^+e^-$ scattering and that $D^0 \bar D^0$
mixing may be near its experimental limit. The uniqueness of our model is that
the Z' couplings are generation-dependent and hence explicitly violate the GIM
mechanism, but can nevertheless be naturally consistent with FCNC constraints.
Direct detection of this Z' is possible but challenging.
|
[{'version': 'v1', 'created': 'Thu, 10 Oct 1996 21:00:03 GMT'}]
|
2016-09-06
|
[array(['Frampton', 'P. H.', ''], dtype=object)]
|
1,891 |
1310.6667
|
Markus Meinert
|
Markus Meinert and G\"unter Reiss
|
Electronic structure and optical band gap determination of NiFe2O4
|
4 pages, 4 figures
|
Journal of Physics: Condensed Matter 26, 115503 (2014)
|
10.1088/0953-8984/26/11/115503
| null |
cond-mat.str-el cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a theoretical study we investigate the electronic structure and the band
gap of the inverse spinel ferrite NiFe2O4. The experimental optical absorption
spectrum is accurately reproduced by fitting the Tran-Blaha parameter in the
modified Becke-Johnson potential. The accuracy of the commonly applied Tauc
plot to find the optical gap is assessed based on the computed spectra and we
find that this approach can lead to a misinterpretation of the experimental
data. The minimum gap of NiFe2O4 is found to be a 1.53eV wide indirect gap,
which is located in the minority spin channel.
|
[{'version': 'v1', 'created': 'Thu, 24 Oct 2013 16:45:32 GMT'}]
|
2014-06-25
|
[array(['Meinert', 'Markus', ''], dtype=object)
array(['Reiss', 'Günter', ''], dtype=object)]
|
1,892 |
hep-ph/0402287
|
Athanasios Dedes Dr
|
Steven Abel, Athanasios Dedes, Kyriakos Tamvakis
|
Naturally small Dirac neutrino masses in supergravity
|
6 pages, Revtex 4, published version
|
Phys.Rev. D71 (2005) 033003
|
10.1103/PhysRevD.71.033003
|
IPPP/0408, DCPT/0416
|
hep-ph
| null |
We show that Dirac neutrino masses of the right size can arise from the
Kahler potential of supergravity. They are proportional to the supersymmetry
and the electroweak breaking scales. We find that they have the experimentally
observed value provided that the ultraviolet cut-off of the Minimal
Supersymmetric Standard Model (MSSM) is between the Grand Unification (GUT)
scale and the heterotic string scale. If lepton number is not conserved, then
relatively suppressed Majorana masses can also be present, resulting in
pseudo-Dirac neutrino masses.
|
[{'version': 'v1', 'created': 'Fri, 27 Feb 2004 13:54:00 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Feb 2005 14:01:36 GMT'}]
|
2009-11-10
|
[array(['Abel', 'Steven', ''], dtype=object)
array(['Dedes', 'Athanasios', ''], dtype=object)
array(['Tamvakis', 'Kyriakos', ''], dtype=object)]
|
1,893 |
2105.02679
|
Ciaran Eising
|
Paul Moran, Leroy-Francisco Periera, Anbuchezhiyan Selvaraju, Tejash
Prakash, Pantelis Ermilios, John McDonald, Jonathan Horgan, Ciar\'an Eising
|
A 2.5D Vehicle Odometry Estimation for Vision Applications
| null |
Proceedings of the 2020 Irish Machine Vision and Image Processing
Conference
| null | null |
cs.RO cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
This paper proposes a method to estimate the pose of a sensor mounted on a
vehicle as the vehicle moves through the world, an important topic for
autonomous driving systems. Based on a set of commonly deployed vehicular
odometric sensors, with outputs available on automotive communication buses
(e.g. CAN or FlexRay), we describe a set of steps to combine a planar odometry
based on wheel sensors with a suspension model based on linear suspension
sensors. The aim is to determine a more accurate estimate of the camera pose.
We outline its usage for applications in both visualisation and computer
vision.
|
[{'version': 'v1', 'created': 'Thu, 6 May 2021 14:01:46 GMT'}]
|
2021-05-07
|
[array(['Moran', 'Paul', ''], dtype=object)
array(['Periera', 'Leroy-Francisco', ''], dtype=object)
array(['Selvaraju', 'Anbuchezhiyan', ''], dtype=object)
array(['Prakash', 'Tejash', ''], dtype=object)
array(['Ermilios', 'Pantelis', ''], dtype=object)
array(['McDonald', 'John', ''], dtype=object)
array(['Horgan', 'Jonathan', ''], dtype=object)
array(['Eising', 'Ciarán', ''], dtype=object)]
|
1,894 |
hep-lat/9405005
|
Martin Baeker
|
Martin B\"aker
|
Localization in Lattice Gauge Theory and a New Multigrid Method
|
LATeX style, 11 pages (plus 4 figure pages). Figure pages are
available as uuencoded ps-file via anonymous ftp from x4u2.desy.de, get
pub/outgoing/baeker/heplat.uu. DESY-preprint 94-079
|
Int.J.Mod.Phys. C6 (1995) 85-104
|
10.1142/S0129183195000083
| null |
hep-lat cond-mat
| null |
We show numerically that the lowest eigenmodes of the 2-dimensional
Laplace-operator with SU(2) gauge couplings are strongly localized. A
connection is drawn to the Anderson-Localization problem. A new Multigrid
algorithm, capable to deal with these modes, shows no critical slowing down for
this problem.
|
[{'version': 'v1', 'created': 'Thu, 5 May 1994 14:46:34 GMT'}]
|
2015-06-25
|
[array(['Bäker', 'Martin', ''], dtype=object)]
|
1,895 |
astro-ph/0005066
|
Giovanni Fossati
|
G. Fossati (1), A. Celotti (2), M. Chiaberge (2), Y.H. Zhang (2), L.
Chiappetti (3), G. Ghisellini (4), L. Maraschi (4), F. Tavecchio (4), E. Pian
(5), A. Treves (6) ((1) Center for Astrophysics and Space Sciences, UCSD, La
Jolla CA, USA; (2) SISSA, Trieste, Italy; (3) IFCTR/CNR, Milano, Italy; (4)
Osservatorio Astronomico di Brera, Milano, Italy; (5) ITESRE/CNR, Bologna,
Italy; (6) Universita` dell'Insubria, Como, Italy)
|
X-ray Emission of Mkn 421: New Clues From Its Spectral Evolution. I.
Temporal Analysis
|
Accepted for publication in The Astrophysical Journal. 13 pages,
LaTeX using emulateapj, onecolfloat and apsfonts, 14 PostScript figures, 5
Tables
|
The Astrophysical Journal, 541 (2000), 153-165
|
10.1086/309422
| null |
astro-ph
| null |
Mkn 421 was repeatedly observed with BeppoSAX in 1997-1998. This is the first
of two papers where we present the results of a thorough temporal and spectral
analysis of all the data available to us, focusing in particular on the flare
of April 1998, which was simultaneously observed also at TeV energies. Here we
focus on the time analysis, while the spectral analysis and physical
interpretation are presented in the companion paper. The detailed study of the
flare in different energy bands reveals very important new results: i) hard
photons lag the soft ones by 2-3 ks -a behavior opposite to what is normally
found in high energy peak BL Lacs X-ray spectra; ii) the flare light curve is
symmetric in the softest X-ray band, while it becomes increasingly asymmetric
at higher energies, with the decay being progressively slower than the rise;
iii) the flux decay of the flare can be intrinsically achromatic if a
stationary underlying emission component is present. The temporal and spectral
information obtained challenge the simplest models currently adopted for the
(synchrotron) emission and most importantly provide clues on the particle
acceleration process.
|
[{'version': 'v1', 'created': 'Wed, 3 May 2000 17:37:08 GMT'}]
|
2009-10-31
|
[array(['Fossati', 'G.', ''], dtype=object)
array(['Celotti', 'A.', ''], dtype=object)
array(['Chiaberge', 'M.', ''], dtype=object)
array(['Zhang', 'Y. H.', ''], dtype=object)
array(['Chiappetti', 'L.', ''], dtype=object)
array(['Ghisellini', 'G.', ''], dtype=object)
array(['Maraschi', 'L.', ''], dtype=object)
array(['Tavecchio', 'F.', ''], dtype=object)
array(['Pian', 'E.', ''], dtype=object)
array(['Treves', 'A.', ''], dtype=object)]
|
1,896 |
2002.12038
|
Daniela Zahn
|
Daniela Zahn, Patrick-Nigel Hildebrandt, Thomas Vasileiadis, Yoav
William Windsor, Yingpeng Qi, H\'el\`ene Seiler and Ralph Ernstorfer
|
Anisotropic Nonequilibrium Lattice Dynamics of Black Phosphorus
| null | null |
10.1021/acs.nanolett.0c00734
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Black phosphorus has recently attracted significant attention for its highly
anisotropic properties. A variety of ultrafast optical spectroscopies has been
applied to probe the carrier response to photoexcitation, but the complementary
lattice response has remained unaddressed. Here we employ femtosecond electron
diffraction to explore how the structural anisotropy impacts the lattice
dynamics after photoexcitation. We observe two timescales in the lattice
response, which we attribute to electron-phonon and phonon-phonon
thermalization. Pronounced differences between armchair and zigzag directions
are observed, indicating a nonthermal state of the lattice lasting up to ~60
ps. This nonthermal state is characterized by a modified anisotropy of the
atomic vibrations compared to equilibrium. Our findings provide insights in
both electron-phonon as well as phonon-phonon coupling and bear direct
relevance for any application of black phosphorus in nonequilibrium conditions.
|
[{'version': 'v1', 'created': 'Thu, 27 Feb 2020 11:17:08 GMT'}
{'version': 'v2', 'created': 'Sun, 1 Mar 2020 11:00:06 GMT'}
{'version': 'v3', 'created': 'Thu, 2 Apr 2020 13:50:03 GMT'}]
|
2020-04-03
|
[array(['Zahn', 'Daniela', ''], dtype=object)
array(['Hildebrandt', 'Patrick-Nigel', ''], dtype=object)
array(['Vasileiadis', 'Thomas', ''], dtype=object)
array(['Windsor', 'Yoav William', ''], dtype=object)
array(['Qi', 'Yingpeng', ''], dtype=object)
array(['Seiler', 'Hélène', ''], dtype=object)
array(['Ernstorfer', 'Ralph', ''], dtype=object)]
|
1,897 |
1812.11947
|
Dev Sinha
|
Dev P. Sinha
|
Progressions of reasoning in K-12 mathematics
|
5 pages, 2 figures; provisionally accepted to the Notices of the
American Mathematical Society
| null | null | null |
math.HO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a research mathematician's perspective on current developments
around in K-12 mathematics. We share activities, and highlight the different
ways in which students' reasoning can progress, such as amount of abstraction,
sophistication of representation, amount of autonomy and use of language. We
end with recommendations for college and university faculty to support greater
development of student reasoning in K-12.
|
[{'version': 'v1', 'created': 'Mon, 31 Dec 2018 18:37:43 GMT'}]
|
2019-01-01
|
[array(['Sinha', 'Dev P.', ''], dtype=object)]
|
1,898 |
1803.07481
|
Wenhan Zhang
|
Wenhan Zhang, M. X. Chen, Jixia Dai, Xueyun Wang, Zhicheng Zhong,
Sang-Wook Cheong and Weida Wu
|
Topological phase transition with nanoscale inhomogeneity in
(Bi$_{1-x}$In$_{x}$)$_{2}$Se$_{3}$
|
16 pages, 5 figures
| null |
10.1021/acs.nanolett.8b00597
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Topological insulators are a class of band insulators with non-trivial
topology, a result of band inversion due to the strong spin-orbit coupling. The
transition between topological and normal insulator can be realized by tuning
the spin-orbit coupling strength, and has been observed experimentally.
However, the impact of chemical disorders on the topological phase transition
was not addressed in previous studies. Herein, we report a systematic scanning
tunneling microscopy/spectroscopy and first-principles study of the topological
phase transition in single crystals of In doped Bi$_2$Se$_3$. Surprisingly, no
band gap closure was observed across the transition. Furthermore, our
spectroscopic-imaging results reveal that In defects are extremely effective
"suppressors" of the band inversion, which leads to microscopic phase
separation of topological-insulator-like and normal-insulator-like nano regions
across the "transition". The observed topological electronic inhomogeneity
demonstrates the significant impact of chemical disorders in topological
materials, shedding new light on the fundamental understanding of topological
phase transition.
|
[{'version': 'v1', 'created': 'Tue, 20 Mar 2018 15:20:50 GMT'}]
|
2018-03-29
|
[array(['Zhang', 'Wenhan', ''], dtype=object)
array(['Chen', 'M. X.', ''], dtype=object)
array(['Dai', 'Jixia', ''], dtype=object)
array(['Wang', 'Xueyun', ''], dtype=object)
array(['Zhong', 'Zhicheng', ''], dtype=object)
array(['Cheong', 'Sang-Wook', ''], dtype=object)
array(['Wu', 'Weida', ''], dtype=object)]
|
1,899 |
cond-mat/9711158
|
Tapash Chakraborty
|
Tapash Chakraborty (Max-Planck Institut f\"ur Physik Komplexer
Systeme, Dresden, Germany), K. Niemel\"a and P. Pietil\"ainen (Theoretical
Physics, University of Oulu, Finland)
|
Impurity Effects and Spin Polarizations in a Narrow Quantum Hall System
|
4 pages, REVTEX, and 4 .ps files
| null |
10.1103/PhysRevB.58.9890
| null |
cond-mat.mes-hall
| null |
The temperature dependence of electron spin polarization for a narrow quantum
Hall system shows behavior analogous to that of a two-dimensional system at
major filling factors. At the lowest half-filled quantum Hall state for which
no two-dimensional analog exists, we find a stable spin partially-polarized
system. Periodic Gaussian repulsive impurities (antidots) in such a system
leads to novel spin transitions at $\nu=\frac13$ and $\nu=\frac12$ and the
pair-correlation functions provide clues about nature of different ground
states in the system. These results can be explored in optical spectroscopy and
optically pumped NMR Knight shift measurements.
|
[{'version': 'v1', 'created': 'Mon, 17 Nov 1997 15:33:15 GMT'}]
|
2009-10-30
|
[array(['Chakraborty', 'Tapash', '',
'Max-Planck Institut für Physik Komplexer\n Systeme, Dresden, Germany'],
dtype=object)
array(['Niemelä', 'K.', '',
'Theoretical\n Physics, University of Oulu, Finland'],
dtype=object)
array(['Pietiläinen', 'P.', '',
'Theoretical\n Physics, University of Oulu, Finland'],
dtype=object) ]
|
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