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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
18,700 |
1801.10330
|
Xavier Blanc
|
Xavier Blanc, C. Le Bris (CERMICS), P.-L Lions (CdF)
|
On correctors for linear elliptic homogenization in the presence of
local defects: the case of advection-diffusion
|
Journal de Math{\'e}matiques Pures et Appliqu{\'e}es, Elsevier, A
Para{\^i}tre
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We follow-up on our works devoted to homogenization theory for linear
second-order elliptic equations with coefficients that are perturbations of
periodic coefficients. We have first considered equations in divergence form in
[6, 7, 8]. We have next shown, in our recent work [9], using a slightly
different strategy of proof than in our earlier works, that we may also address
the equation --aij$\partial$iju = f. The present work is devoted to
advection-diffusion equations: --aij$\partial$iju + bj$\partial$ju = f. We
prove, under suitable assumptions on the coefficients aij, bj, 1 $\le$ i, j
$\le$ d (typically that they are the sum of a periodic function and some
perturbation in L p , for suitable p < +$\infty$), that the equation admits a
(unique) invariant measure and that this measure may be used to transform the
problem into a problem in divergence form, amenable to the techniques we have
previously developed for the latter case.
|
[{'version': 'v1', 'created': 'Wed, 31 Jan 2018 08:01:14 GMT'}]
|
2018-02-01
|
[array(['Blanc', 'Xavier', '', 'CERMICS'], dtype=object)
array(['Bris', 'C. Le', '', 'CERMICS'], dtype=object)
array(['Lions', 'P. -L', '', 'CdF'], dtype=object)]
|
18,701 |
1909.01234
|
Vladislav Pokorn\'y
|
Vladislav Pokorn\'y, Martin \v{Z}onda, Georgios Loukeris, and
Tom\'a\v{s} Novotn\'y
|
Second Order Perturbation Theory for a Superconducting Double Quantum
Dot
|
8 pages, 4 figures, proceedings of the SCES 2019 conference
|
JPS Conf. Proc. 30, 011002 (2020)
|
10.7566/JPSCP.30.011002
| null |
cond-mat.mes-hall cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend our approach based on the second order perturbation theory in the
Coulomb interaction recently developed for quantum dots coupled to
superconducting leads to the superconducting double quantum dot setups. Using
our perturbative method we evaluate several single-particle quantities such as
on-dot induced gap and generalized occupations together with the Andreev in-gap
spectra and compare them with numerically exact results from the Numerical
Renormalization Group and Quantum Monte Carlo finding a very good
correspondence for not too strongly correlated regimes. Thus we can offer in a
wide parameter range this method as an efficient and reliable alternative to
the heavy numerical tools exclusively used so far for the description of such
experimentally relevant systems.
|
[{'version': 'v1', 'created': 'Tue, 3 Sep 2019 14:53:01 GMT'}]
|
2020-07-27
|
[array(['Pokorný', 'Vladislav', ''], dtype=object)
array(['Žonda', 'Martin', ''], dtype=object)
array(['Loukeris', 'Georgios', ''], dtype=object)
array(['Novotný', 'Tomáš', ''], dtype=object)]
|
18,702 |
1503.03542
|
Tadashi Takayanagi
|
Masamichi Miyaji and Tadashi Takayanagi
|
Surface/State Correspondence as a Generalized Holography
|
28 pages, 4 figures, Latex
| null |
10.1093/ptep/ptv089
|
YITP-15-16, IPMU15-0024
|
hep-th cond-mat.str-el gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a new duality relation between codimension two space-like surfaces
in gravitational theories and quantum states in dual Hilbert spaces. This
surface/state correspondence largely generalizes the idea of holography such
that we do not need to rely on any existence of boundaries in gravitational
spacetimes. The present idea is motivated by the recent interpretation of
AdS/CFT in terms of the tensor networks so called MERA. Moreover, we study this
correspondence from the viewpoint of entanglement entropy and information
metric. The Cramer-Rao bound in quantum estimation theory implies that the
quantum fluctuations of radial coordinate of the AdS is highly suppressed in
the large N limit.
|
[{'version': 'v1', 'created': 'Thu, 12 Mar 2015 00:58:29 GMT'}]
|
2015-07-15
|
[array(['Miyaji', 'Masamichi', ''], dtype=object)
array(['Takayanagi', 'Tadashi', ''], dtype=object)]
|
18,703 |
gr-qc/9708030
|
Takeshi Chiba
|
Takeshi Chiba, Naoshi Sugiyama, and Jun'ichi Yokoyama
|
Imprints of the Metrically-coupled Dilaton on Density Perturbations in
Inflationary Cosmology
|
title changed, 20 pages, to appear in Nucl.Phys.B
|
Nucl.Phys. B530 (1998) 304-324
|
10.1016/S0550-3213(98)00412-X
| null |
gr-qc astro-ph
| null |
Spectra of density perturbations produced during chaotic inflation are
calculated, taking both adiabatic and isocurvature modes into account in a
class of scalar-tensor theories of gravity in which the dilaton is metrically
coupled. Comparing the predicted spectrum of the cosmic microwave background
radiation anisotropies with the one observed by the COBE-DMR we calculate
constraints on the parameters of these theories, which turn out to be stronger
by an order-of-magnitude than those obtained from post-Newtonian experiments.
|
[{'version': 'v1', 'created': 'Fri, 15 Aug 1997 11:51:59 GMT'}
{'version': 'v2', 'created': 'Wed, 27 May 1998 03:57:03 GMT'}]
|
2009-10-30
|
[array(['Chiba', 'Takeshi', ''], dtype=object)
array(['Sugiyama', 'Naoshi', ''], dtype=object)
array(['Yokoyama', "Jun'ichi", ''], dtype=object)]
|
18,704 |
1310.0229
|
Jordi Casas-Roma
|
Jordi Casas-Roma and Jordi Herrera-Joancomart\'i and Vicen\c{c} Torra
|
Evolutionary Algorithm for Graph Anonymization
|
6 pages
| null | null | null |
cs.DB cs.SI
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
In recent years there has been a significant increase in the use of graphs as
a tool for representing information. It is very important to preserve the
privacy of users when one wants to publish this information, especially in the
case of social graphs. In this case, it is essential to implement an
anonymization process in the data in order to preserve users' privacy. In this
paper we present an algorithm for graph anonymization, called Evolutionary
Algorithm for Graph Anonymization (EAGA), based on edge modifications to
preserve the k-anonymity model.
|
[{'version': 'v1', 'created': 'Tue, 1 Oct 2013 10:31:31 GMT'}
{'version': 'v2', 'created': 'Wed, 26 Mar 2014 10:36:22 GMT'}]
|
2014-03-27
|
[array(['Casas-Roma', 'Jordi', ''], dtype=object)
array(['Herrera-Joancomartí', 'Jordi', ''], dtype=object)
array(['Torra', 'Vicenç', ''], dtype=object)]
|
18,705 |
2110.07873
|
Lokesh Boominathan
|
Lokesh Boominathan, Xaq Pitkow
|
Phase transitions in when feedback is useful
| null | null | null | null |
q-bio.NC
|
http://creativecommons.org/licenses/by/4.0/
|
Sensory observations about the world are invariably ambiguous. Inference
about the world's latent variables is thus an important computation for the
brain. However, computational constraints limit the performance of these
computations. These constraints include energetic costs for neural activity and
noise on every channel. Efficient coding is one prominent theory that describes
how such limited resources can best be used. In one incarnation, this leads to
a theory of predictive coding, where predictions are subtracted from signals,
reducing the cost of sending something that is already known. This theory does
not, however, account for the costs or noise associated with those predictions.
Here we offer a theory that accounts for both feedforward and feedback costs,
and noise in all computations. We formulate this inference problem as
message-passing on a graph whereby feedback serves as an internal control
signal aiming to maximize how well an inference tracks a target state while
minimizing the costs of computation. We apply this novel formulation of
inference as control to the canonical problem of inferring the hidden scalar
state of a linear dynamical system with Gaussian variability. The best solution
depends on architectural constraints, such as Dale's law, the ubiquitous law
that each neuron makes solely excitatory or inhibitory postsynaptic
connections. This biological structure can create asymmetric costs for
feedforward and feedback channels. Under such conditions, our theory predicts
the gain of optimal predictive feedback and how it is incorporated into the
inference computation. We show that there is a non-monotonic dependence of
optimal feedback gain as a function of both the computational parameters and
the world dynamics, leading to phase transitions in whether feedback provides
any utility in optimal inference under computational constraints.
|
[{'version': 'v1', 'created': 'Fri, 15 Oct 2021 05:50:16 GMT'}
{'version': 'v2', 'created': 'Wed, 25 May 2022 17:25:12 GMT'}
{'version': 'v3', 'created': 'Tue, 11 Oct 2022 21:16:16 GMT'}]
|
2022-10-13
|
[array(['Boominathan', 'Lokesh', ''], dtype=object)
array(['Pitkow', 'Xaq', ''], dtype=object)]
|
18,706 |
1003.2009
|
Dmitriy Zanin
|
S.V. Astashkin, D.V. Zanin, E.M. Semenov, F.A. Sukochev
|
Kruglov operator and operators defined by random permutations
|
translated from original Russian text
| null | null | null |
math.FA
|
http://creativecommons.org/licenses/by/3.0/
|
The Kruglov property and the Kruglov operator play an important role in the
study of geometric properties of r.i. function spaces. We prove that the
boundedness of the Kruglov operator in a r.i. space is equivalent to the
uniform boundedness on this space of a sequence of operators defined by random
permutations. It is shown also that there is no minimal r.i. space with the
Kruglov property.
|
[{'version': 'v1', 'created': 'Wed, 10 Mar 2010 02:02:16 GMT'}]
|
2010-03-11
|
[array(['Astashkin', 'S. V.', ''], dtype=object)
array(['Zanin', 'D. V.', ''], dtype=object)
array(['Semenov', 'E. M.', ''], dtype=object)
array(['Sukochev', 'F. A.', ''], dtype=object)]
|
18,707 |
2003.12598
|
Muhamad Felemban
|
Muhamad Felemban, Anas Daghistani, Yahya Javeed, Jason Kobes, Arif
Ghafoor
|
A Security and Performance Driven Architecture for Cloud Data Centers
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the growing cyber-security threats, ensuring the security of data in
Cloud data centers is a challenging task. A prominent type of attack on Cloud
data centers is data tampering attack that can jeopardize the confidentiality
and the integrity of data. In this article, we present a security and
performance driven architecture for these centers that incorporates an
intrusion management system for multi-tenant distributed transactional
databases. The proposed architecture uses a novel data partitioning and
placement scheme based on damage containment and communication cost of
distributed transactions. In addition, we present a benchmarking framework for
evaluating the performance of the proposed architecture. The results illustrate
a trade-off between security and performance goals for Cloud data centers.
|
[{'version': 'v1', 'created': 'Fri, 27 Mar 2020 18:54:24 GMT'}]
|
2020-03-31
|
[array(['Felemban', 'Muhamad', ''], dtype=object)
array(['Daghistani', 'Anas', ''], dtype=object)
array(['Javeed', 'Yahya', ''], dtype=object)
array(['Kobes', 'Jason', ''], dtype=object)
array(['Ghafoor', 'Arif', ''], dtype=object)]
|
18,708 |
1307.8319
|
Ilya Zhbannikov
|
Ilya Y. Zhbannikov and Gregory W. Donohoe
|
Allocating the chains of consecutive additions for optimal fixed-point
data path synthesis
| null |
2012 IEEE 55th International Midwest Symposium on Circuits and
Systems (MWSCAS)
|
10.1109/MWSCAS.2012.6292184
| null |
cs.AR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Minimization of computational errors in the fixed-point data path is often
difficult task. Many signal processing algorithms use chains of consecutive
additions. The analyzing technique that can be applied to fixed-point data path
synthesis has been proposed. This technique takes advantage of allocating the
chains of consecutive additions in order to predict growing width of the data
path and minimize the design complexity and computational errors.
|
[{'version': 'v1', 'created': 'Wed, 31 Jul 2013 13:40:40 GMT'}]
|
2013-08-01
|
[array(['Zhbannikov', 'Ilya Y.', ''], dtype=object)
array(['Donohoe', 'Gregory W.', ''], dtype=object)]
|
18,709 |
2211.12186
|
Daniel Huybrechts
|
Daniel Huybrechts
|
Chow groups of surfaces of lines in cubic fourfolds
|
15 pages
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The surface of lines in a cubic fourfold intersecting a fixed line splits
motivically into two parts, one of which resembles a K3 surface. We define the
analogue of the Beauville-Voisin class and study the push-forward map to the
Fano variety of all lines with respect to the natural splitting of the
Bloch-Beilinson filtration introduced by Mingmin Shen and Charles Vial.
|
[{'version': 'v1', 'created': 'Tue, 22 Nov 2022 11:25:37 GMT'}]
|
2022-11-23
|
[array(['Huybrechts', 'Daniel', ''], dtype=object)]
|
18,710 |
0810.2828
|
Patrick Leung
|
P.M. Leung, T.C. Ralph, William J. Munro, Kae Nemoto
|
Spectral Effects of Fast Response Cross Kerr Non-Linearity on Quantum
Gate
|
7 pages, 4 figures. Submitted to PRA
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
According to idealized models, a strong Kerr non-linearity may be used to
build optical quantum gates for optical quantum information processing by
inducing conditional phase shifts on quantum states. Recently, Shapiro (PRA 73,
062305 (2006)) argued that for a Kerr medium with non-instantaneous but fast
response, essentially no phase shift is induced on two-single-photon input
states, and thus a quantum gate build from such a medium cannot work. Here we
show that a fast response Kerr medium induces some but very little phase shifts
on a two-single-photon input state, and it is insufficient for high fidelity
quantum computation. We point out that this is caused by the medium imparting
spectral entanglement to the input photons. We further show that a way to
circumvent this problem and achieve a high fidelity gate, is to engineer the
dispersion properties of the medium to give a dominant spectral effect over the
non-instantaneous response, in addition to satisfying a phase matching
condition.
|
[{'version': 'v1', 'created': 'Thu, 16 Oct 2008 00:23:40 GMT'}
{'version': 'v2', 'created': 'Sun, 30 Nov 2008 14:23:46 GMT'}]
|
2008-11-30
|
[array(['Leung', 'P. M.', ''], dtype=object)
array(['Ralph', 'T. C.', ''], dtype=object)
array(['Munro', 'William J.', ''], dtype=object)
array(['Nemoto', 'Kae', ''], dtype=object)]
|
18,711 |
2105.04495
|
Shilei Ding
|
Shilei Ding, Zhongyu Liang, Dongwook Go, Chao Yun, Mingzhu Xue, Zhou
Liu, Sven Becker, Wenyun Yang, Honglin Du, Changsheng Wang, Yingchang Yang,
Gerhard Jakob, Mathias Kl\"aui, Yuriy Mokrousov, Jinbo Yang
|
Observation of the Orbital Rashba-Edelstein Magnetoresistance
|
11 pages,3 figures
| null |
10.1103/PhysRevLett.128.067201
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the observation of magnetoresistance (MR) originating from the
orbital angular momentum transport (OAM) in a Permalloy (Py) / oxidized Cu
(Cu*) heterostructure: the orbital Rashba-Edelstein magnetoresistance. The
angular dependence of the MR depends on the relative angle between the induced
OAM and the magnetization in a similar fashion as the spin Hall
magnetoresistance (SMR). Despite the absence of elements with large spin-orbit
coupling, we find a sizable MR ratio, which is in contrast to the conventional
SMR which requires heavy elements. By varying the thickness of the Cu* layer,
we confirm that the interface is responsible for the MR, suggesting that the
orbital Rashba-Edelstein effect is responsible for the generation of the OAM.
Through Py thickness-dependence studies, we find that the effective values for
the spin diffusion and spin dephasing lengths of Py are significantly larger
than the values measured in Py / Pt bilayers, approximately by the factor of 2
and 4, respectively. This implies that another mechanism beyond the
conventional spin-based scenario is responsible for the MR observed in Py / Cu*
structures originated in a sizeable transport of OAM. Our findings not only
unambiguously demonstrate the current-induced torque without using any heavy
element via the OAM channel but also provide an important clue towards the
microscopic understanding of the role that OAM transport can play for
magnetization dynamics.
|
[{'version': 'v1', 'created': 'Mon, 10 May 2021 16:35:12 GMT'}
{'version': 'v2', 'created': 'Tue, 11 May 2021 08:45:43 GMT'}]
|
2022-02-23
|
[array(['Ding', 'Shilei', ''], dtype=object)
array(['Liang', 'Zhongyu', ''], dtype=object)
array(['Go', 'Dongwook', ''], dtype=object)
array(['Yun', 'Chao', ''], dtype=object)
array(['Xue', 'Mingzhu', ''], dtype=object)
array(['Liu', 'Zhou', ''], dtype=object)
array(['Becker', 'Sven', ''], dtype=object)
array(['Yang', 'Wenyun', ''], dtype=object)
array(['Du', 'Honglin', ''], dtype=object)
array(['Wang', 'Changsheng', ''], dtype=object)
array(['Yang', 'Yingchang', ''], dtype=object)
array(['Jakob', 'Gerhard', ''], dtype=object)
array(['Kläui', 'Mathias', ''], dtype=object)
array(['Mokrousov', 'Yuriy', ''], dtype=object)
array(['Yang', 'Jinbo', ''], dtype=object)]
|
18,712 |
astro-ph/0209161
|
Paul P. Plucinsky
|
Paul P. Plucinsky (1), Norbert S. Schulz (2), Herman L. Marshall (2),
Catherine E. Grant (2), George Chartas (3), Divas Sanwal (3), Marcus A. Teter
(3), Alexey A. Vikhlinin (1), Richard J. Edgar (1), Michael W. Wise (2),
Glenn E. Allen (2), Shanil N. Virani (1), Joseph M. DePasquale (1), Michael
T. Raley (1) ((1) Harvard-Smithsonian Center for Astrophysics, (2) Center for
Space Research, Massachusetts Institute of Technology, (3) Department of
Astronomy and Astrophysics, Pennsylvania State University)
|
The Flight Spectral Response of the ACIS Instrument
|
12 pages, 15 figures, SPIE style file, To appear in "Astronomical
Telescopes and Instrumentation 2002" (SPIE Conference Proceedings), eds. J.E.
Truemper and H.D. Tananbaum
| null |
10.1117/12.461473
| null |
astro-ph
| null |
We discuss the flight calibration of the spectral response of the Advanced
CCD Imaging Spectrometer (ACIS) on-board the Chandra X-ray Observatory (CXO).
The spectral resolution and sensitivity of the ACIS instrument have both been
evolving over the course of the mission. The spectral resolution of the
frontside-illuminated (FI) CCDs changed dramatically in the first month of the
mission due to radiation damage. Since that time, the spectral resolution of
the FI CCDs and the backside-illuminated (BI) CCDs have evolved gradually with
time. We demonstrate the efficacy of charge-transfer inefficiency (CTI)
correction algorithms which recover some of the lost performance. The detection
efficiency of the ACIS instrument has been declining throughout the mission,
presumably due to a layer of contamination building up on the filter and/or
CCDs. We present a characterization of the energy dependence of the excess
absorption and demonstrate software which models the time dependence of the
absorption from energies of 0.4 keV and up. The spectral redistribution
function and the detection efficiency are well-characterized at energies from
1.5 to 8.0 keV. The calibration at energies below 1.5 keV is challenging
because of the lack of strong lines in the calibration source and also because
of the inherent non-linear dependence with energy of the CTI and the absorption
by the contamination layer. We have been using data from celestial sources with
relatively simple spectra to determine the quality of the calibration below 1.5
keV. The analysis of these observations demonstrate that the CTI correction
recovers a significant fraction of the spectral resolution of the FI CCDs and
the models of the time-dependent absorption result in consistent measurements
of the flux at low energies for data from a BI (S3) CCD.
|
[{'version': 'v1', 'created': 'Mon, 9 Sep 2002 16:04:24 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Sep 2002 20:29:07 GMT'}]
|
2009-11-07
|
[array(['Plucinsky', 'Paul P.', ''], dtype=object)
array(['Schulz', 'Norbert S.', ''], dtype=object)
array(['Marshall', 'Herman L.', ''], dtype=object)
array(['Grant', 'Catherine E.', ''], dtype=object)
array(['Chartas', 'George', ''], dtype=object)
array(['Sanwal', 'Divas', ''], dtype=object)
array(['Teter', 'Marcus A.', ''], dtype=object)
array(['Vikhlinin', 'Alexey A.', ''], dtype=object)
array(['Edgar', 'Richard J.', ''], dtype=object)
array(['Wise', 'Michael W.', ''], dtype=object)
array(['Allen', 'Glenn E.', ''], dtype=object)
array(['Virani', 'Shanil N.', ''], dtype=object)
array(['DePasquale', 'Joseph M.', ''], dtype=object)
array(['Raley', 'Michael T.', ''], dtype=object)]
|
18,713 |
1105.5740
|
Naoki Kubota
|
Naoki Kubota
|
Quenched invariance principle for simple random walk on discrete point
processes
|
This paper is accepted to SPA
|
Stochastic Processes and their Applications, 123(10),
pp.3737-3752, 2013
|
10.1016/j.spa.2013.05.006
| null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the simple random walk on random graphs generated by discrete
point processes. This random graph has a random subset of a cubic lattice as
the vertices and lines between any consecutive vertices on lines parallel to
each coordinate axis as the edges. Under the assumption that discrete point
processes are finitely dependent and stationary, we prove that the quenched
invariance principle holds, that is, for almost every configuration of a point
process, the path distribution of the walk converges weakly to that of a
Brownian motion.
|
[{'version': 'v1', 'created': 'Sat, 28 May 2011 21:25:49 GMT'}
{'version': 'v2', 'created': 'Fri, 14 Oct 2011 04:21:20 GMT'}
{'version': 'v3', 'created': 'Mon, 17 Oct 2011 03:14:17 GMT'}
{'version': 'v4', 'created': 'Sat, 25 May 2013 09:22:09 GMT'}]
|
2015-03-19
|
[array(['Kubota', 'Naoki', ''], dtype=object)]
|
18,714 |
1711.06580
|
Jun Chen
|
Jun Chen, Hou Wenjie, Defu Hou, Taotao Qiu
|
Confronting the Potential-driven DBI-inspired nonminimal kinetic
coupling (Dinkic) inflation to the observational data
| null |
Chinese Physics C Vol. 42, No. 4 (2018) 045102
|
10.1088/1674-1137/42/4/045102
| null |
astro-ph.CO gr-qc hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the previous work, a new kind of inflation model was proposed, which has
the interesting property that its perturbation equation of motion gets a
correction of k^4, due to the non-linearity of the kinetic term. Nonetheless,
the scale-invariance of the power spectrum remains valid, both in large-k and
small-k limits. In this paper, we investigate in detail the spectral index, the
index running and the tensor/scalar ratio in this model, especially on the
potential-driven case, and compare the results to the current PLANCK/BICEP
observational data. We also discuss the tensor spectrum in this case, which is
expected to be tested by the future observations on primordial gravitational
waves.
|
[{'version': 'v1', 'created': 'Fri, 17 Nov 2017 15:08:56 GMT'}]
|
2018-03-16
|
[array(['Chen', 'Jun', ''], dtype=object)
array(['Wenjie', 'Hou', ''], dtype=object)
array(['Hou', 'Defu', ''], dtype=object)
array(['Qiu', 'Taotao', ''], dtype=object)]
|
18,715 |
math/9702201
| null |
David W. Catlin and John P. D'Angelo
|
Positivity conditions for bihomogeneous polynomials
| null | null | null | null |
math.CV
| null |
In this paper we continue our study of a complex variables version of
Hilbert's seventeenth problem by generalizing some of the results from [CD].
Given a bihomogeneous polynomial $f$ of several complex variables that is
positive away from the origin, we proved that there is an integer $d$ so that
$||z||^{2d} f(z,{\overline z})$ is the squared norm of a holomorphic mapping.
Thus, although $f$ may not itself be a squared norm, it must be the quotient of
squared norms of holomorphic homogeneous polynomial mappings. The proof
required some operator theory on the unit ball. In the present paper we prove
that we can replace the squared Euclidean norm by squared norms arising from an
orthonormal basis for the space of homogeneous polynomials on any bounded
circled pseudoconvex domain of finite type. To do so we prove a compactness
result for an integral operator on such domains related to the Bergman kernel
function.
|
[{'version': 'v1', 'created': 'Mon, 5 May 1997 21:02:41 GMT'}]
|
2009-09-25
|
[array(['Catlin', 'David W.', ''], dtype=object)
array(["D'Angelo", 'John P.', ''], dtype=object)]
|
18,716 |
1107.4786
|
Frederic Le Mouel
|
Roya Golchay (CITI Insa Lyon / Inria Grenoble Rh\^one-Alpes),
Fr\'ed\'eric Le Mou\"el (CITI Insa Lyon / Inria Grenoble Rh\^one-Alpes),
St\'ephane Fr\'enot (CITI Insa Lyon / Inria Grenoble Rh\^one-Alpes), Julien
Ponge (CITI Insa Lyon / Inria Grenoble Rh\^one-Alpes)
|
Towards Bridging IoT and Cloud Services: Proposing Smartphones as Mobile
and Autonomic Service Gateways
|
Position Paper
|
UbiMob'2011 (2011) 45--48
| null | null |
cs.OS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Computing is currently getting at the same time incredibly in the small with
sensors/actuators embedded in our every- day objects and also greatly in the
large with data and ser- vice clouds accessible anytime, anywhere. This
Internet of Things is physically closed to the user but suffers from weak
run-time execution environments. Cloud Environments provide powerful data
storage and computing power but can not be easily accessed and integrate the
final-user context- awareness. We consider smartphones are set to become the
universal interface between these two worlds. In this position paper, we
propose a middleware approach where smartphones provide service gateways to
bridge the gap between IoT services and Cloud services. Since smartphones are
mobile gateways, they should be able to (re)configure themself according to
their place, things discovered around, and their own resources such battery.
Several issues are discussed: collaborative event-based context management,
adaptive and opportunistic service deployment and invocation, multi-criteria
(user- and performance-oriented) optimization decision algorithm.
|
[{'version': 'v1', 'created': 'Sun, 24 Jul 2011 19:39:02 GMT'}]
|
2011-07-26
|
[array(['Golchay', 'Roya', '',
'CITI Insa Lyon / Inria Grenoble Rhône-Alpes'], dtype=object)
array(['Mouël', 'Frédéric Le', '',
'CITI Insa Lyon / Inria Grenoble Rhône-Alpes'], dtype=object)
array(['Frénot', 'Stéphane', '',
'CITI Insa Lyon / Inria Grenoble Rhône-Alpes'], dtype=object)
array(['Ponge', 'Julien', '',
'CITI Insa Lyon / Inria Grenoble Rhône-Alpes'], dtype=object)]
|
18,717 |
astro-ph/9705007
|
Alan Watson
|
Alan M. Watson, Alison L. Coil, Debra S. Shepherd, Peter Hofner, and
Ed Churchwell
|
Direct Observations of the Ionizing Star in the UC HII Region
G29.96-0.02: A Strong Constraint on the Stellar Birth Line for Massive Stars
|
42 pages; LaTex; 11 Postscript figures; accepted for publication in
ApJ
|
Astrophys.J.487:818-833,1997
|
10.1086/304650
| null |
astro-ph
| null |
We have observed the ultracompact HII region G29.96-0.02 in the near infrared
J, H, and K bands and in the Br-gamma line. By comparison with radio
observations, we determine that the extinction to the nebula is AK = 2.14 with
a 3 sigma uncertainty of 0.25. We identify the ionizing star and determine its
intrinsic K magnitude. The star does not have an infrared excess and so appears
to be no longer accreting. The K magnitude and the bolometric luminosity allow
us to place limits on the location of the ionizing star in the HR diagram. The
3 sigma upper limit on the effective temperature of the ionizing star is 42500
K. We favor a luminosity appropriate for star with a mass in excess of about 60
solar masses. The limit on the temperature and luminosity exclude stars on the
ZAMS and stars within 10^6 yr of the ZAMS. Since the age of the UC HII region
is estimated to be only about 10^5 yr, we suggest that this is direct evidence
that the stellar birth line for massive stars at twice solar metallicity must
be significantly redder than the ZAMS.
|
[{'version': 'v1', 'created': 'Thu, 1 May 1997 19:58:44 GMT'}]
|
2009-02-16
|
[array(['Watson', 'Alan M.', ''], dtype=object)
array(['Coil', 'Alison L.', ''], dtype=object)
array(['Shepherd', 'Debra S.', ''], dtype=object)
array(['Hofner', 'Peter', ''], dtype=object)
array(['Churchwell', 'Ed', ''], dtype=object)]
|
18,718 |
hep-lat/0210052
|
David Adams
|
David H. Adams
|
Fermionic topological charge of families of lattice gauge fields
|
4p., Lattice2002(chiral) (+ one paragraph not included in the
proceedings version for length reasons)
| null |
10.1016/S0920-5632(03)80464-4
| null |
hep-lat hep-th math-ph math.MP
| null |
Topological charge of families of lattice gauge fields is defined
fermionically via families index theory for the overlap Dirac operator. Certain
obstructions to gauge invariance of the overlap chiral fermion determinant, as
well as the lattice analogues of certain obstructions to gauge fixings without
the Gribov problem, have natural descriptions in this context.
|
[{'version': 'v1', 'created': 'Tue, 29 Oct 2002 14:58:35 GMT'}]
|
2009-11-07
|
[array(['Adams', 'David H.', ''], dtype=object)]
|
18,719 |
1706.07574
|
Huafeng Zhang
|
Huafeng Zhang
|
Elliptic quantum groups and Baxter relations
|
39 pages, published version
|
Alg. Number Th. 12 (2018) 599-647
|
10.2140/ant.2018.12.599
| null |
math-ph math.MP math.QA math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a category O of modules over the elliptic quantum group of sl_N
with well-behaved q-character theory. We construct asymptotic modules as
analytic continuation of a family of finite-dimensional modules, the
Kirillov--Reshetikhin modules. In the Grothendieck ring of this category we
prove two types of identities: generalized Baxter relations in the spirit of
Frenkel--Hernandez between finite-dimensional modules and asymptotic modules;
three-term Baxter TQ relations of infinite-dimensional modules.
|
[{'version': 'v1', 'created': 'Fri, 23 Jun 2017 06:37:11 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Mar 2018 20:25:58 GMT'}]
|
2018-06-20
|
[array(['Zhang', 'Huafeng', ''], dtype=object)]
|
18,720 |
hep-ph/0410072
|
Alexander Nesterenko
|
A.V. Nesterenko and J. Papavassiliou
|
The QCD analytic running coupling and chiral symmetry breaking
|
Talk given at 11th International QCD Conference (QCD 04), 5 - 10 July
2004, Montpellier, France; 4 pages, 4 figures
|
Nucl.Phys.Proc.Suppl. 152 (2006) 47
|
10.1016/j.nuclphysbps.2005.08.009
|
FTUV-04-1005, IFIC-04-51
|
hep-ph hep-th
| null |
We study the dependence on the pion mass of the QCD effective charge by
employing the dispersion relations for the Adler D function. This new massive
analytic running coupling is compared to the effective coupling saturated by
the dynamically generated gluon mass. A qualitative picture of the possible
impact of the former coupling on the chiral symmetry breaking is presented.
|
[{'version': 'v1', 'created': 'Tue, 5 Oct 2004 14:38:43 GMT'}]
|
2007-05-23
|
[array(['Nesterenko', 'A. V.', ''], dtype=object)
array(['Papavassiliou', 'J.', ''], dtype=object)]
|
18,721 |
2202.03074
|
Anna Hilsmann
|
Alexandra Zimmer, Anna Hilsmann, Wieland Morgenstern, Peter Eisert
|
Imposing Temporal Consistency on Deep Monocular Body Shape and Pose
Estimation
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Accurate and temporally consistent modeling of human bodies is essential for
a wide range of applications, including character animation, understanding
human social behavior and AR/VR interfaces. Capturing human motion accurately
from a monocular image sequence is still challenging and the modeling quality
is strongly influenced by the temporal consistency of the captured body motion.
Our work presents an elegant solution for the integration of temporal
constraints in the fitting process. This does not only increase temporal
consistency but also robustness during the optimization. In detail, we derive
parameters of a sequence of body models, representing shape and motion of a
person, including jaw poses, facial expressions, and finger poses. We optimize
these parameters over the complete image sequence, fitting one consistent body
shape while imposing temporal consistency on the body motion, assuming linear
body joint trajectories over a short time. Our approach enables the derivation
of realistic 3D body models from image sequences, including facial expression
and articulated hands. In extensive experiments, we show that our approach
results in accurately estimated body shape and motion, also for challenging
movements and poses. Further, we apply it to the special application of sign
language analysis, where accurate and temporal consistent motion modelling is
essential, and show that the approach is well-suited for this kind of
application.
|
[{'version': 'v1', 'created': 'Mon, 7 Feb 2022 11:11:55 GMT'}
{'version': 'v2', 'created': 'Tue, 8 Feb 2022 16:58:13 GMT'}]
|
2022-02-09
|
[array(['Zimmer', 'Alexandra', ''], dtype=object)
array(['Hilsmann', 'Anna', ''], dtype=object)
array(['Morgenstern', 'Wieland', ''], dtype=object)
array(['Eisert', 'Peter', ''], dtype=object)]
|
18,722 |
0712.0315
|
Alessandro de Angelis
|
Alessandro De Angelis, Oriana Mansutti, Massimo Persic
|
Very-High Energy Gamma Astrophysics
|
60 pages, 52 figures, (on line abstract replacement)
|
Riv.Nuovo Cim.31:187,2008
|
10.1393/ncr/i2008-10032-2
| null |
astro-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
High-energy photons are a powerful probe for astrophysics and for fundamental
physics under extreme conditions. During the recent years, our knowledge of the
most violent phenomena in the Universe has impressively progressed thanks to
the advent of new detectors for high-energy gamma-rays. Observation of
gamma-rays gives an exciting view of the high-energy universe thanks to
satellite-based telescopes (AGILE, GLAST) and to ground-based detectors like
the Cherenkov telescopes (H.E.S.S. and MAGIC in particular), which recently
discovered more than 60 new very-high-energy sources. The progress achieved
with the last generation of Cherenkov telescopes is comparable to the one drawn
by EGRET with respect to the previous gamma-ray satellite detectors. This
article reviews the present status of high-energy gamma astrophysics, with
emphasis on the recent results and on the experimental developments.
|
[{'version': 'v1', 'created': 'Mon, 3 Dec 2007 17:01:19 GMT'}
{'version': 'v2', 'created': 'Fri, 7 Dec 2007 01:58:40 GMT'}
{'version': 'v3', 'created': 'Sun, 30 Dec 2007 13:17:21 GMT'}
{'version': 'v4', 'created': 'Tue, 20 May 2008 14:51:04 GMT'}
{'version': 'v5', 'created': 'Mon, 7 Jul 2008 13:50:16 GMT'}
{'version': 'v6', 'created': 'Wed, 9 Jul 2008 13:37:24 GMT'}]
|
2009-09-29
|
[array(['De Angelis', 'Alessandro', ''], dtype=object)
array(['Mansutti', 'Oriana', ''], dtype=object)
array(['Persic', 'Massimo', ''], dtype=object)]
|
18,723 |
math/0407300
|
Julie Roskies Litman
|
F. Miller Maley, David P. Robbins, Julie Roskies
|
On the Areas of Cyclic and Semicyclic Polygons
|
22 pages
| null | null | null |
math.MG
| null |
We investigate the ``generalized Heron polynomial'' that relates the squared
area of an n-gon inscribed in a circle to the squares of its side lengths. For
a (2m+1)-gon or (2m+2)-gon, we express it as the defining polynomial of a
certain variety derived from the variety of binary (2m-1)-forms having m-1
double roots. Thus we obtain explicit formulas for the areas of cyclic
heptagons and octagons, and illuminate some mysterious features of Robbins'
formulas for the areas of cyclic pentagons and hexagons. We also introduce a
companion family of polynomials that relate the squared area of an n-gon
inscribed in a circle, one of whose sides is a diameter, to the squared lengths
of the other sides. By similar algebraic techniques we obtain explicit formulas
for these polynomials for all n <= 7.
|
[{'version': 'v1', 'created': 'Fri, 16 Jul 2004 21:11:21 GMT'}]
|
2007-05-23
|
[array(['Maley', 'F. Miller', ''], dtype=object)
array(['Robbins', 'David P.', ''], dtype=object)
array(['Roskies', 'Julie', ''], dtype=object)]
|
18,724 |
2206.10851
|
Ko Arimatsu
|
Ko Arimatsu, Takafumi Kamizuka
|
Faint debris disk peering through superflare light echo
|
11 pages, 5 figures, ApJL accepted
| null |
10.3847/2041-8213/ac7b24
| null |
astro-ph.EP astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the detectability of strong mid-infrared (MIR) light echoes from
faint debris disks illuminated by bright superflares of M-dwarf stars.
Circumstellar dust grains around an M-dwarf star are simultaneously heated by
superflare radiation. One can thus expect their re-emission in the MIR
wavelength regime. According to our model calculations for the Proxima Centauri
system, the nearest M-dwarf star system, thermal emission echos from an inner
($r < 1~{\rm au}$) debris disk with a total mass down to that of the solar
system's zodiacal dust are expected to emerge at wavelengths longer than $\sim
10~{\rm \mu m}$ with a strength comparable to or greater than a white-light
superflare. Also, observable echos from inner- ($r \lesssim 0.5~{\rm au}$)
debris disks irradiated by energetic ($\gtrsim 10^{33.5}~{\rm ergs}$)
superflares of nearby ($D < 3~{\rm pc}$) M-dwarfs are expected. Our simulation
results indicate that superflare monitoring using high-speed optical
instruments like OASES and its prompt follow-up using ground-based MIR
instruments, such as TAO/MIMIZUKU, can detect these MIR light echoes from
debris disks around solar neighborhood flare stars.
|
[{'version': 'v1', 'created': 'Wed, 22 Jun 2022 05:27:56 GMT'}]
|
2022-07-20
|
[array(['Arimatsu', 'Ko', ''], dtype=object)
array(['Kamizuka', 'Takafumi', ''], dtype=object)]
|
18,725 |
1311.2765
|
Stefan Walter
|
Stefan Walter and Jan Carl Budich
|
Teleportation-induced entanglement of two nanomechanical oscillators
coupled to a topological superconductor
|
6 pages
|
Phys. Rev. B 89, 155431, (2014)
|
10.1103/PhysRevB.89.155431
| null |
cond-mat.mes-hall quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A one-dimensional topological superconductor features a single fermionic zero
mode that is delocalized over two Majorana bound states located at the ends of
the system. We study a pair of spatially separated nanomechanical oscillators
tunnel-coupled to these Majorana modes. Most interestingly, we demonstrate that
the combination of electron-phonon coupling and a finite charging energy on the
mesoscopic topological superconductor can lead to an effective superexchange
between the oscillators via the non-local fermionic zero mode. We further show
that this teleportation mechanism leads to entanglement of the two oscillators
over distances that can significantly exceed the coherence length of the
superconductor.
|
[{'version': 'v1', 'created': 'Tue, 12 Nov 2013 13:00:09 GMT'}
{'version': 'v2', 'created': 'Tue, 29 Apr 2014 13:19:34 GMT'}]
|
2014-04-30
|
[array(['Walter', 'Stefan', ''], dtype=object)
array(['Budich', 'Jan Carl', ''], dtype=object)]
|
18,726 |
0710.5395
|
John Schliemann
|
John Schliemann
|
Cyclotron motion and magnetic focusing in semiconductor quantum wells
with spin-orbit coupling
|
14 pages, 8 figures included, version to appear in Phys. Rev. B
|
Phys. Rev. B 77, 125303 (2008)
|
10.1103/PhysRevB.77.125303
| null |
cond-mat.mes-hall
| null |
We investigate the ballistic motion of electrons in III-V semiconductor
quantum wells with Rashba spin-orbit coupling in a perpendicular magnetic
field. Taking into account the full quantum dynamics of the problem, we explore
the modifications of classical cyclotron orbits due to spin-orbit interaction.
As a result, for electron energies comparable with the cyclotron energy the
dynamics are particularly rich and not adequately described by semiclassical
approximations. Our study is complementary to previous semiclassical approaches
concentrating on the regime of weaker fields.
|
[{'version': 'v1', 'created': 'Mon, 29 Oct 2007 11:47:55 GMT'}
{'version': 'v2', 'created': 'Mon, 14 Jan 2008 12:41:31 GMT'}]
|
2008-03-06
|
[array(['Schliemann', 'John', ''], dtype=object)]
|
18,727 |
1108.0268
|
Wojciech Olszewski
|
K. Szyma\'nski, W. Olszewski, L. Dobrzy\'nski, D. Satu{\l}a, D. J.
Gawryluk, M. Berkowski, R. Pu\'zniak, A. Wi\'sniewski
|
M\"ossbauer studies of powdered single crystals of FeTe0.5Se0.5
|
13 pages, 8 figures
|
Supercond. Sci. Technol. 24 (2011) 105010
|
10.1088/0953-2048/24/10/105010
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The M\"ossbauer measurements performed on powdered single crystals of
FeTe0.5Se0.5 (Tc ~ 14.7 K) reveal minor content of two impurity phases,
identified as Fe3O4 and Fe7Se8, among the major tetragonal phase. From the
shape of impurity subspectra it follows that Fe7Se8 behaves in
superparamagnetic manner, most likely because of randomly distributed Fe
vacancies in the lattice structure of Fe Te Se. The magnetite content in the
powdered absorber exposed to ambient air conditions remains unchanged during
period of 16 months. Ageing effects were observed for the samples stored under
argon atmosphere and small increase of the isomer shift of the doublet was
detected. Presented temperature dependence of the hyperfine parameters can be
explained as due to possible orthorhombic distortion or to temperature
behaviour of impurity phases Fe3O4 and Fe7Se8. Strong tendency to formation of
crystalline texture of powdered sample is observed.
|
[{'version': 'v1', 'created': 'Mon, 1 Aug 2011 09:47:20 GMT'}]
|
2011-08-31
|
[array(['Szymański', 'K.', ''], dtype=object)
array(['Olszewski', 'W.', ''], dtype=object)
array(['Dobrzyński', 'L.', ''], dtype=object)
array(['Satuła', 'D.', ''], dtype=object)
array(['Gawryluk', 'D. J.', ''], dtype=object)
array(['Berkowski', 'M.', ''], dtype=object)
array(['Puźniak', 'R.', ''], dtype=object)
array(['Wiśniewski', 'A.', ''], dtype=object)]
|
18,728 |
1806.09973
|
Nikhil Kalyanapuram
|
Nikhil Kalyanapuram
|
A Statistical Analysis of Anharmonic Gases
|
7 pages
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we consider an anharmonic perturbation to the harmonic
oscillator in the classical and the quantum regimes. We analyse a relativistic
particle subjected to such a potential and then proceed to study a gas of such
particles. In the first case, the partition function is computed and stated. In
both cases, expressions for the average energy are obtained.
|
[{'version': 'v1', 'created': 'Fri, 22 Jun 2018 09:04:33 GMT'}]
|
2018-06-27
|
[array(['Kalyanapuram', 'Nikhil', ''], dtype=object)]
|
18,729 |
math/9201241
|
Shelah Office
|
John T. Baldwin, Saharon Shelah
|
The primal framework. I
| null |
Ann. Pure Appl. Logic 46 (1990), 235--264
| null |
Shelah [BlSh:330]
|
math.LO
| null |
This the first of a series of articles dealing with abstract classification
theory. The apparatus to assign systems of cardinal invariants to models of a
first order theory (or determine its impossibility) is developed in [Sh:a]. It
is natural to try to extend this theory to classes of models which are
described in other ways. Work on the classification theory for nonelementary
classes [Sh:88] and for universal classes [Sh:300] led to the conclusion that
an axiomatic approach provided the best setting for developing a theory of
wider application. In the first chapter we describe the axioms on which the
remainder of the article depends and give some examples and context to justify
this level of generality. The study of universal classes takes as a primitive
the notion of closing a subset under functions to obtain a model. We replace
that concept by the notion of a prime model. We begin the detailed discussion
of this idea in Chapter II. One of the important contributions of
classification theory is the recognition that large models can often be
analyzed by means of a family of small models indexed by a tree of height at
most omega. More precisely, the analyzed model is prime over such a tree.
Chapter III provides sufficient conditions for prime models over such trees to
exist.
|
[{'version': 'v1', 'created': 'Mon, 15 Jan 1990 00:00:00 GMT'}]
|
2009-09-25
|
[array(['Baldwin', 'John T.', ''], dtype=object)
array(['Shelah', 'Saharon', ''], dtype=object)]
|
18,730 |
cmp-lg/9505016
|
Pascale Fung
|
Pascale Fung (Computer Science Department, Columbia Univ)
|
A Pattern Matching method for finding Noun and Proper Noun Translations
from Noisy Parallel Corpora
|
8 pages, uuencoded compressed postscript file. To appear in the
Proceedings of the 33rd ACL
| null | null | null |
cmp-lg cs.CL
| null |
We present a pattern matching method for compiling a bilingual lexicon of
nouns and proper nouns from unaligned, noisy parallel texts of
Asian/Indo-European language pairs. Tagging information of one language is
used. Word frequency and position information for high and low frequency words
are represented in two different vector forms for pattern matching. New anchor
point finding and noise elimination techniques are introduced. We obtained a
73.1\% precision. We also show how the results can be used in the compilation
of domain-specific noun phrases.
|
[{'version': 'v1', 'created': 'Sat, 6 May 1995 08:48:47 GMT'}]
|
2008-02-03
|
[array(['Fung', 'Pascale', '',
'Computer Science Department, Columbia Univ'], dtype=object)]
|
18,731 |
1805.09758
|
Vince Grolmusz
|
Kristof Takacs, Balint Varga, and Vince Grolmusz
|
PDB_Amyloid: The Extended Live Amyloid Structure List from the PDB
| null | null | null | null |
q-bio.BM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Protein Data Bank (PDB) contains more than 135 000 entries today. From
these, relatively few amyloid structures can be identified, since amyloids are
insoluble in water. Therefore, mostly solid state NMR-recorded amyloid
structures are deposited in the PDB. Based on the geometric analysis of these
deposited structures we have prepared an automatically updated webserver, which
generates the list of the deposited amyloid structures, and, additionally,
those globular protein entries, which have amyloid-like substructures of a
given size and characteristics. We have found that applying only the properly
chosen geometric conditions, it is possible to identify the deposited amyloid
structures, and a number of globular proteins with amyloid-like substructures.
We have analyzed these globular proteins and have found that many of them are
known to form amyloids more easily than many other globular proteins. Our
results relate to the method of (Stankovic, I. et al. (2017): Construction of
Amyloid PDB Files Database. Transactions on Internet Research. 13 (1): 47-51),
who have applied a hybrid textual-search and geometric approach for finding
amyloids in the PDB.
If one intends to identify a subset of the PDB for some applications, the
identification algorithm needs to be re-run periodically, since in 2017, on
average, every day 30 new entries were deposited in the data bank. Our
webserver is updated regularly and automatically, and the identified amyloid-
and partial amyloid structures can be viewed or their list can be downloaded
from the site https://pitgroup.org/amyloid.
|
[{'version': 'v1', 'created': 'Thu, 24 May 2018 16:21:55 GMT'}
{'version': 'v2', 'created': 'Fri, 25 May 2018 16:56:03 GMT'}]
|
2018-05-28
|
[array(['Takacs', 'Kristof', ''], dtype=object)
array(['Varga', 'Balint', ''], dtype=object)
array(['Grolmusz', 'Vince', ''], dtype=object)]
|
18,732 |
2306.17587
|
Pablo Del Mazo-Sevillano
|
P. del Mazo-Sevillano and J. Hermann
|
Variational principle to regularize machine-learned density functionals:
the non-interacting kinetic-energy functional
| null | null | null | null |
physics.chem-ph cs.LG physics.comp-ph stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Practical density functional theory (DFT) owes its success to the
groundbreaking work of Kohn and Sham that introduced the exact calculation of
the non-interacting kinetic energy of the electrons using an auxiliary
mean-field system. However, the full power of DFT will not be unleashed until
the exact relationship between the electron density and the non-interacting
kinetic energy is found. Various attempts have been made to approximate this
functional, similar to the exchange--correlation functional, with much less
success due to the larger contribution of kinetic energy and its more non-local
nature. In this work we propose a new and efficient regularization method to
train density functionals based on deep neural networks, with particular
interest in the kinetic-energy functional. The method is tested on
(effectively) one-dimensional systems, including the hydrogen chain,
non-interacting electrons, and atoms of the first two periods, with excellent
results. For the atomic systems, the generalizability of the regularization
method is demonstrated by training also an exchange--correlation functional,
and the contrasting nature of the two functionals is discussed from a
machine-learning perspective.
|
[{'version': 'v1', 'created': 'Fri, 30 Jun 2023 12:07:26 GMT'}]
|
2023-07-03
|
[array(['del Mazo-Sevillano', 'P.', ''], dtype=object)
array(['Hermann', 'J.', ''], dtype=object)]
|
18,733 |
1412.5659
|
Nicholas Dronen
|
Nicholas Dronen, Peter W. Foltz, Kyle Habermehl
|
Effective sampling for large-scale automated writing evaluation systems
| null | null | null | null |
cs.CL cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Automated writing evaluation (AWE) has been shown to be an effective
mechanism for quickly providing feedback to students. It has already seen wide
adoption in enterprise-scale applications and is starting to be adopted in
large-scale contexts. Training an AWE model has historically required a single
batch of several hundred writing examples and human scores for each of them.
This requirement limits large-scale adoption of AWE since human-scoring essays
is costly. Here we evaluate algorithms for ensuring that AWE models are
consistently trained using the most informative essays. Our results show how to
minimize training set sizes while maximizing predictive performance, thereby
reducing cost without unduly sacrificing accuracy. We conclude with a
discussion of how to integrate this approach into large-scale AWE systems.
|
[{'version': 'v1', 'created': 'Wed, 17 Dec 2014 22:41:14 GMT'}]
|
2014-12-19
|
[array(['Dronen', 'Nicholas', ''], dtype=object)
array(['Foltz', 'Peter W.', ''], dtype=object)
array(['Habermehl', 'Kyle', ''], dtype=object)]
|
18,734 |
math/0609057
|
Xiang Ma
|
Xiang Ma, Changping Wang
|
Willmore Surfaces of Constant Moebius Curvature
|
16 pages. Mistakes occured in the proof to the main theorem (Thm 3.6)
has been corrected
|
Annals of Global Analysis and Geometry 32(2007), No.3, 297-310
|
10.1007/s10455-007-9065-9
| null |
math.DG
| null |
We study Willmore surfaces of constant Moebius curvature $K$ in $S^4$. It is
proved that such a surface in $S^3$ must be part of a minimal surface in $R^3$
or the Clifford torus. Another result in this paper is that an isotropic
surface (hence also Willmore) in $S^4$ of constant $K$ could only be part of a
complex curve in $C^2\cong R^4$ or the Veronese 2-sphere in $S^4$. It is
conjectured that they are the only examples possible. The main ingredients of
the proofs are over-determined systems and isoparametric functions.
|
[{'version': 'v1', 'created': 'Mon, 4 Sep 2006 14:31:30 GMT'}
{'version': 'v2', 'created': 'Mon, 18 Sep 2006 14:45:35 GMT'}]
|
2007-09-12
|
[array(['Ma', 'Xiang', ''], dtype=object)
array(['Wang', 'Changping', ''], dtype=object)]
|
18,735 |
hep-ph/0405138
|
Ana Curiel
|
Ana M. Curiel and Maria J. Herrero
|
Decays of MSSM Higgs in Flavour-Changing Quark Channels
|
6 pages, 4 figures; Talk given by A. M. Curiel at the XXIXth
Rencontres de Moriond Electroweak Interactions and Unified Theories, La
Thuile, Aosta Valley, Italy, March 21-28, 2004
| null | null | null |
hep-ph
| null |
We compute the genuine SUSY one-loop quantum contributions to
flavour-changing MSSM Higgs-boson decays into $b \bar s$ and $s \bar b$ using
the full diagrammatic approach that is valid for all $\tan \beta$ values and do
not rely on the mass-insertion approximation for the characteristic
flavour-changing parameter. We analyze in full detail the dependence of these
flavour-changing partial widths on all the relevant MSSM parameters and also
study the non-decoupling behaviour of these widths with the SUSY mass
parameters. We find that these contributions are sizable as compared to the SM
ones, and can be very efficient as an indirect method in the future search for
Supersymmetry.
|
[{'version': 'v1', 'created': 'Fri, 14 May 2004 16:53:06 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Jun 2005 07:30:45 GMT'}
{'version': 'v3', 'created': 'Tue, 28 Jun 2005 07:08:20 GMT'}]
|
2007-05-23
|
[array(['Curiel', 'Ana M.', ''], dtype=object)
array(['Herrero', 'Maria J.', ''], dtype=object)]
|
18,736 |
1509.02766
|
Edda Dal Santo
|
Debora Amadori, Paolo Baiti, Andrea Corli, Edda Dal Santo
|
Global existence of solutions for a multi-phase flow: a bubble in a
liquid tube and related cases
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we study the problem of the global existence (in time) of weak,
entropic solutions to a system of three hyperbolic conservation laws, in one
space dimension, for large initial data. The system models the dynamics of
phase transitions in an isothermal fluid; in Lagrangian coordinates, the phase
interfaces are represented as stationary contact discontinuities. We focus on
the persistence of solutions consisting in three bulk phases separated by two
interfaces. Under some stability conditions on the phase configuration and by a
suitable front tracking algorithm we show that, if the BV-norm of the initial
data is less than an explicit (large) threshold, then the Cauchy problem has
global solutions.
|
[{'version': 'v1', 'created': 'Wed, 9 Sep 2015 13:18:53 GMT'}]
|
2015-09-10
|
[array(['Amadori', 'Debora', ''], dtype=object)
array(['Baiti', 'Paolo', ''], dtype=object)
array(['Corli', 'Andrea', ''], dtype=object)
array(['Santo', 'Edda Dal', ''], dtype=object)]
|
18,737 |
2002.00233
|
J\"org Jahnel
|
Andreas-Stephan Elsenhans and J\"org Jahnel
|
Explicit families of $K3$ surfaces having real multiplication
| null | null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For families of $K3$ surfaces, we establish a sufficient criterion for real
or complex multiplication. Our criterion is arithmetic in nature. It may show,
at first, that the generic fibre of the family has a nontrivial endomorphism
field. Moreover, the endomorphism field does not shrink under specialisation.
As an application, we present two explicit families of $K3$ surfaces having
real multiplication by $\bbQ(\sqrt{2})$ and $\bbQ(\sqrt{5})$, respectively.
|
[{'version': 'v1', 'created': 'Sat, 1 Feb 2020 15:48:17 GMT'}]
|
2020-02-04
|
[array(['Elsenhans', 'Andreas-Stephan', ''], dtype=object)
array(['Jahnel', 'Jörg', ''], dtype=object)]
|
18,738 |
cond-mat/9805257
|
Sean McNamara
|
S. McNamara and S. Luding
|
Energy non-equipartition in systems of inelastic, rough spheres
|
4 pages latex, 4 embedded eps figures, accepted by Phys Rev E
| null |
10.1103/PhysRevE.58.2247
| null |
cond-mat.stat-mech
| null |
We calculate and verify with simulations the ratio between the average
translational and rotational energies of systems with rough, inelastic
particles, either forced or freely cooling. The ratio shows non-equipartition
of energy. In stationary flows, this ratio depends mainly on the particle
roughness, but in nonstationary flows, such as freely cooling granular media,
it also depends strongly on the normal dissipation. The approach presented here
unifies and simplifies different results obtained by more elaborate kinetic
theories. We observe that the boundary induced energy flux plays an important
role.
|
[{'version': 'v1', 'created': 'Wed, 20 May 1998 17:21:15 GMT'}]
|
2009-10-31
|
[array(['McNamara', 'S.', ''], dtype=object)
array(['Luding', 'S.', ''], dtype=object)]
|
18,739 |
1511.03977
|
Fabian Dunker
|
Fabian Dunker
|
Adaptive estimation for some nonparametric instrumental variable models
| null | null | null | null |
stat.CO econ.EM math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The problem of endogeneity in statistics and econometrics is often handled by
introducing instrumental variables (IV) which fulfill the mean independence
assumption, i.e. the unobservable is mean independent of the instruments. When
full independence of IV's and the unobservable is assumed, nonparametric IV
regression models and nonparametric demand models lead to nonlinear integral
equations with unknown integral kernels. We prove convergence rates for the
mean integrated square error of the iteratively regularized Newton method
applied to these problems. Compared to related results we derive stronger
convergence results that rely on weaker nonlinearity restrictions. We
demonstrate in numerical simulations for a nonparametric IV regression that the
method produces better results than the standard model.
|
[{'version': 'v1', 'created': 'Thu, 12 Nov 2015 17:26:47 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Apr 2020 23:42:46 GMT'}
{'version': 'v3', 'created': 'Thu, 12 Aug 2021 11:12:59 GMT'}]
|
2021-08-13
|
[array(['Dunker', 'Fabian', ''], dtype=object)]
|
18,740 |
math-ph/9807036
|
Andrzej Frydryszak
|
A. Frydryszak, J. Lukierski, P. Minnaert, M. Mozrzymas
|
On Quantum Deformations of D=4 Conformal Algebra
|
Plain LaTeX 2.09. No figures. 8 pages. To appear in the proceedings
of the 7th Colloquium on Quantum Groups and Integrable Systems (Prague, June
18-20, 1998)
| null |
10.1023/A:1021688702414
| null |
math-ph math.MP math.QA
| null |
Three classes of classical r-matrices for sl(4,C) algebra are constructed in
quasi-Frobenius algebra approach. They satisfy CYBE and are spanned
respectively on 8,10,12 generators. The o(4,2) reality condition can be imposed
only on the eight dimensional r matrices with dimension-full deformation
parameters. Contrary to the Poincare algebra case, it appears that all
deformations with a mass-like deformation parameter (kappa- deformations) are
described by classical r-matrices satisfying CYBE.
|
[{'version': 'v1', 'created': 'Fri, 31 Jul 1998 17:41:32 GMT'}]
|
2009-10-31
|
[array(['Frydryszak', 'A.', ''], dtype=object)
array(['Lukierski', 'J.', ''], dtype=object)
array(['Minnaert', 'P.', ''], dtype=object)
array(['Mozrzymas', 'M.', ''], dtype=object)]
|
18,741 |
1809.02955
|
Krzysztof Szajowski
|
Marek Skarupski and Krzysztof Szajowski
|
Full vs. no information best choice game with finite horizon
|
Submitted to: Stochastic Operations Research in Business and Industry
(eds. by Tadashi Dohi, Katsunori Ano and Shoji Kasahara), World Scientific
Publisher
|
Journal of the Operations Research Society of China 2023
|
10.1007/s40305-023-00460-w
|
W13/2018/P-006
|
math.OC cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let us consider two companies A and B. Both of them are interested in buying
a set of some goods. The company A is a big corporation and it knows the actual
value of the good on the market and is able to observe the previous values of
them. The company B has no information about the actual value of the good but
it can compare the actual position of the good on the market with the previous
position of the good offered. Both of the players want to choose the very best
object overall. The recall is not allowed. The number of the objects is fixed
and finite. One can think about these two types of buyers a business customer
vs. an individual customer. The mathematical model of the competition between
them is presented and the solution is defined and constructed.
|
[{'version': 'v1', 'created': 'Sun, 9 Sep 2018 11:16:25 GMT'}]
|
2023-06-09
|
[array(['Skarupski', 'Marek', ''], dtype=object)
array(['Szajowski', 'Krzysztof', ''], dtype=object)]
|
18,742 |
2010.13553
|
Igor A Golovchanskiy
|
I.A. Golovchanskiy, N.N. Abramov, V.S. Stolyarov, M. Weides, V.V.
Ryazanov, A.A. Golubov, A.V. Ustinov, M.Yu. Kupriyanov
|
Ultra-strong photon-to-magnon coupling in multilayered heterostructures
involving superconducting coherence via ferromagnetic layers
|
17 pages, 3 figures, 1 table
| null |
10.1126/sciadv.abe8638
| null |
cond-mat.supr-con physics.app-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The critical step for future quantum industry demands realization of
efficient information exchange between different-platform hybrid systems,
including photonic and magnonic systems, that can harvest advantages of
distinct platforms. The major restraining factor for the progress in certain
hybrid systems is the fundamentally weak coupling parameter between the
elemental particles. This restriction impedes the entire field of hybrid
magnonics by making realization of scalable on-chip hybrid magnonic systems
unattainable. In this work, we propose a general flexible approach for
realization of on-chip hybrid magnonic systems with unprecedentedly strong
coupling parameters. The approach is based on multilayered micro-structures
containing superconducting, insulating and ferromagnetic layers with modified
both photon phase velocities and magnon eigen-frequencies. Phenomenologically,
the enhanced coupling strength is provided by the radically reduced photon mode
volume. The microscopic mechanism of the phonon-to-magnon coupling in studied
systems evidences formation of the long-range superconducting coherence via
thick strong ferromagnetic layers. This coherence is manifested by coherent
superconducting screening of microwave fields by the
superconductor/ferromagnet/superconductor three-layers in presence of
magnetization precession. This discovery offers new opportunities in microwave
superconducting spintronics for quantum technologies.
|
[{'version': 'v1', 'created': 'Mon, 26 Oct 2020 13:06:19 GMT'}]
|
2021-06-22
|
[array(['Golovchanskiy', 'I. A.', ''], dtype=object)
array(['Abramov', 'N. N.', ''], dtype=object)
array(['Stolyarov', 'V. S.', ''], dtype=object)
array(['Weides', 'M.', ''], dtype=object)
array(['Ryazanov', 'V. V.', ''], dtype=object)
array(['Golubov', 'A. A.', ''], dtype=object)
array(['Ustinov', 'A. V.', ''], dtype=object)
array(['Kupriyanov', 'M. Yu.', ''], dtype=object)]
|
18,743 |
1911.11386
|
Jae-Kap Lee
|
K. P. S. S. Hembram, Jeongwon Park and Jae-Kap Lee
|
Landau Raman Regulation Observed from Geometric Graphene Structures
Including Single-Wall Carbon Nanotubes
|
28 pages, 4 figures
| null | null | null |
physics.app-ph cond-mat.mes-hall
|
http://creativecommons.org/licenses/by/4.0/
|
Here, we report Landau regulation in Raman modes for geometric graphene
structures including single-wall carbon nanotubes (SWNTs). First-principles
calculations show that radial-tangential Raman modes (RTMs) (comprising radial
and tangential Eigenvectors) appear in order, following radial breading mode
(RBM) (~150 cm-1). RTMs reveal two degenerated or non-degenerated frequencies
per node and extend upto G (~1590 cm-1). In Raman measurements for SWNTs, we
demonstrate the existence of RTMs at ~180-1440 cm-1, which have been partially
interpreted as RBM band for ~180-300 cm-1 and intermediate frequency mode for
600-1300 cm-1. We reinterpret the RBM band as a coalescent signature of RBM
(~150-170 cm-1) and 1st node RTM (~170-190 cm-1) for geometric graphene
structures of ~2.0-2.2 nm in diameter. The sequential appearance of RBM and RTM
and the revelation of the double degeneracy are due to Landau regulation
working on spatial variation of the radial and tangential Eigenvectors. Our
findings provide a further way of understanding the nature of low dimensional
materials utilizing Raman spectroscopy.
|
[{'version': 'v1', 'created': 'Tue, 26 Nov 2019 07:57:15 GMT'}]
|
2019-11-27
|
[array(['Hembram', 'K. P. S. S.', ''], dtype=object)
array(['Park', 'Jeongwon', ''], dtype=object)
array(['Lee', 'Jae-Kap', ''], dtype=object)]
|
18,744 |
2011.10019
|
Thi Minh Phuong Vu
|
Thi Minh Phuong Vu
|
Weak holonomicity for equivariant $\mathcal{D}$ modules on rigid
analytic flag varieties
| null | null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $G$ be a $p$ adic Lie group. In this work, we develop a dimension theory
for coadmissible $G$ equivariant $D$ modules on smooth rigid analytic spaces
and prove the inequality of Bernstein for the case of rigid analytic flag
varieties. In this setting, we then introduce the notion of weakly holonomic
$G$ equivariant $\mathcal{D}$ modules. Finally, we define the duality functor
on the category of weakly holonomic modules and study some of its properties.
|
[{'version': 'v1', 'created': 'Thu, 19 Nov 2020 18:37:38 GMT'}]
|
2020-11-20
|
[array(['Vu', 'Thi Minh Phuong', ''], dtype=object)]
|
18,745 |
2208.13760
|
Niclas Boehmer
|
Niclas Boehmer, Robert Bredereck, Piotr Faliszewski, Rolf Niedermeier
|
A Quantitative and Qualitative Analysis of the Robustness of
(Real-World) Election Winners
|
Accepted to EAAMO'22
| null | null | null |
cs.GT econ.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Contributing to the toolbox for interpreting election results, we evaluate
the robustness of election winners to random noise. We compare the robustness
of different voting rules and evaluate the robustness of real-world election
winners from the Formula 1 World Championship and some variant of political
elections. We find many instances of elections that have very non-robust
winners and numerous delicate robustness patterns that cannot be identified
using classical and simpler approaches.
|
[{'version': 'v1', 'created': 'Mon, 29 Aug 2022 17:49:44 GMT'}]
|
2022-08-30
|
[array(['Boehmer', 'Niclas', ''], dtype=object)
array(['Bredereck', 'Robert', ''], dtype=object)
array(['Faliszewski', 'Piotr', ''], dtype=object)
array(['Niedermeier', 'Rolf', ''], dtype=object)]
|
18,746 |
1812.06186
|
Felix Meister
|
Felix Meister, Tiziano Passerini, Viorel Mihalef, Ahmet Tuysuzoglu,
Andreas Maier and Tommaso Mansi
|
Towards Fast Biomechanical Modeling of Soft Tissue Using Neural Networks
|
Accepted in Medical Imaging meets NeurIPS Workshop, NeurIPS 2018
| null | null | null |
q-bio.QM physics.med-ph q-bio.TO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
To date, the simulation of organ deformations for applications like therapy
planning or image-guided interventions is calculated by solving the
elastodynamics equations. While efficient solvers have been proposed for fast
simulations, methods that are both real-time and accurate are still an open
challenge. An ideal, interactive solver would be able to provide physically and
numerically accurate results at high frame rate, which requires efficient force
computation and time integration. Towards this goal, we explore in this paper
for the first time the use of neural networks to directly learn the underlying
biomechanics. Given a 3D mesh of a soft tissue segmented from medical images,
we train a neural network to predict vertex-wise accelerations for a large time
step based on the current state of the system. The model is trained using the
deformation of a bar under torsion, and evaluated on different motions,
geometries, and hyperelastic material models. For predictions of ten times the
original time step we observed a mean error of 0.017mm $\pm$ 0.014 (0.032) at a
mesh size of 50mm x 50mm x 100mm. Predictions at 20dt yield an error of 2.10mm
$\pm$ 1.73 (4.37) and by further increasing the prediction time step the
maximum error rises to 38.3mm due to an artificial stiffening. In all
experiments our proposed method stayed stable, while the reference solver fails
to converge. Our experiments suggest that it is possible to directly learn the
mechanical simulation and open further investigations for the direct
application of machine learning to speed-up biophysics solvers.
|
[{'version': 'v1', 'created': 'Thu, 13 Dec 2018 18:57:53 GMT'}]
|
2018-12-18
|
[array(['Meister', 'Felix', ''], dtype=object)
array(['Passerini', 'Tiziano', ''], dtype=object)
array(['Mihalef', 'Viorel', ''], dtype=object)
array(['Tuysuzoglu', 'Ahmet', ''], dtype=object)
array(['Maier', 'Andreas', ''], dtype=object)
array(['Mansi', 'Tommaso', ''], dtype=object)]
|
18,747 |
0805.4192
|
Geoffrey Lovelace
|
Geoffrey Lovelace, Robert Owen, Harald P. Pfeiffer, Tony Chu
|
Binary-black-hole initial data with nearly-extremal spins
| null |
Phys.Rev.D78:084017,2008
|
10.1103/PhysRevD.78.084017
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There is a significant possibility that astrophysical black holes with
nearly-extremal spins exist. Numerical simulations of such systems require
suitable initial data. In this paper, we examine three methods of constructing
binary-black-hole initial data, focusing on their ability to generate black
holes with nearly-extremal spins: (i) Bowen-York initial data, including
standard puncture data (based on conformal flatness and Bowen-York extrinsic
curvature), (ii) standard quasi-equilibrium initial data (based on the
extended-conformal-thin-sandwich equations, conformal flatness, and maximal
slicing), and (iii) quasi-equilibrium data based on the superposition of
Kerr-Schild metrics. We find that the two conformally-flat methods (i) and (ii)
perform similarly, with spins up to about 0.99 obtainable at the initial time.
However, in an evolution, we expect the spin to quickly relax to a
significantly smaller value around 0.93 as the initial geometry relaxes. For
quasi-equilibrium superposed Kerr-Schild (SKS) data [method (iii)], we
construct initial data with \emph{initial} spins as large as 0.9997. We evolve
SKS data sets with spins of 0.93 and 0.97 and find that the spin drops by only
a few parts in 10^4 during the initial relaxation; therefore, we expect that
SKS initial data will allow evolutions of binary black holes with relaxed spins
above 0.99. [Abstract abbreviated; full abstract also mentions several
secondary results.]
|
[{'version': 'v1', 'created': 'Tue, 27 May 2008 19:31:20 GMT'}
{'version': 'v2', 'created': 'Wed, 28 May 2008 00:45:39 GMT'}
{'version': 'v3', 'created': 'Thu, 16 Oct 2008 16:05:56 GMT'}]
|
2009-02-23
|
[array(['Lovelace', 'Geoffrey', ''], dtype=object)
array(['Owen', 'Robert', ''], dtype=object)
array(['Pfeiffer', 'Harald P.', ''], dtype=object)
array(['Chu', 'Tony', ''], dtype=object)]
|
18,748 |
2212.14026
|
Lorenzo Piroli
|
Lorenzo Piroli, Yaodong Li, Romain Vasseur, Adam Nahum
|
Triviality of quantum trajectories close to a directed percolation
transition
|
18 pages, 9 figures; v2: Appendix added, minor revision
|
Phys. Rev. B 107, 224303 (2023)
|
10.1103/PhysRevB.107.224303
| null |
quant-ph cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study quantum circuits consisting of unitary gates, projective
measurements, and control operations that steer the system towards a pure
absorbing state. Two types of phase transition occur as the rate of these
control operations is increased: a measurement-induced entanglement transition,
and a directed percolation transition into the absorbing state (taken here to
be a product state). In this work we show analytically that these transitions
are generically distinct, with the quantum trajectories becoming disentangled
before the absorbing state transition is reached, and we analyze their critical
properties. We introduce a simple class of models where the measurements in
each quantum trajectory define an Effective Tensor Network (ETN) -- a subgraph
of the initial spacetime graph where nontrivial time evolution takes place. By
analyzing the entanglement properties of the ETN, we show that the entanglement
and absorbing-state transitions coincide only in the limit of infinite local
Hilbert-space dimension. Focusing on a Clifford model which allows numerical
simulations for large system sizes, we verify our predictions and study the
finite-size crossover between the two transitions at large local Hilbert space
dimension. We give evidence that the entanglement transition is governed by the
same fixed point as in hybrid circuits without feedback.
|
[{'version': 'v1', 'created': 'Wed, 28 Dec 2022 18:52:56 GMT'}
{'version': 'v2', 'created': 'Sat, 3 Jun 2023 14:23:58 GMT'}]
|
2023-06-07
|
[array(['Piroli', 'Lorenzo', ''], dtype=object)
array(['Li', 'Yaodong', ''], dtype=object)
array(['Vasseur', 'Romain', ''], dtype=object)
array(['Nahum', 'Adam', ''], dtype=object)]
|
18,749 |
1504.01283
|
Christos Athanasiadis
|
Ron M. Adin, Christos A. Athanasiadis, Sergi Elizalde and Yuval
Roichman
|
Character formulas and descents for the hyperoctahedral group
|
Final version, with minor changes and corrections; 50 pages, one
figure
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A general setting to study a certain type of formulas, expressing characters
of the symmetric group $\mathfrak{S}_n$ explicitly in terms of descent sets of
combinatorial objects, has been developed by two of the authors. This theory is
further investigated in this paper and extended to the hyperoctahedral group
$B_n$. Key ingredients are a new formula for the irreducible characters of
$B_n$, the signed quasisymmetric functions introduced by Poirier, and a new
family of matrices of Walsh--Hadamard type. Applications include formulas for
natural $B_n$-actions on coinvariant and exterior algebras and on the top
homology of a certain poset in terms of the combinatorics of various classes of
signed permutations, as well as a $B_n$-analogue of an equidistribution theorem
of D\'esarm\'enien and Wachs.
|
[{'version': 'v1', 'created': 'Mon, 6 Apr 2015 13:28:19 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Aug 2015 14:21:42 GMT'}
{'version': 'v3', 'created': 'Tue, 24 Jan 2017 23:31:15 GMT'}]
|
2017-01-26
|
[array(['Adin', 'Ron M.', ''], dtype=object)
array(['Athanasiadis', 'Christos A.', ''], dtype=object)
array(['Elizalde', 'Sergi', ''], dtype=object)
array(['Roichman', 'Yuval', ''], dtype=object)]
|
18,750 |
hep-th/9404147
| null |
Hiromichi Nakazato, Mikio Namiki, Saverio Pascazio
|
Exponential behavior of a quantum system in a macroscopic medium
|
8 pages, report BA-TH/94-170
|
Phys.Rev.Lett. 73 (1994) 1063-1066
|
10.1103/PhysRevLett.73.1063
| null |
hep-th
| null |
An exponential behavior at all times is derived for a solvable dynamical
model in the weak-coupling, macroscopic limit. Some implications for the
quantum measurement problem are discussed, in particular in connection with
dissipation.
|
[{'version': 'v1', 'created': 'Sat, 23 Apr 1994 11:17:00 GMT'}]
|
2009-10-28
|
[array(['Nakazato', 'Hiromichi', ''], dtype=object)
array(['Namiki', 'Mikio', ''], dtype=object)
array(['Pascazio', 'Saverio', ''], dtype=object)]
|
18,751 |
2112.10874
|
Ricardo Stuardo
|
Paul Merrikin, Ricardo Stuardo
|
Comments on non-Abelian T-duals and their holographic description
|
19 pages, 5 figures, v2 references added
| null |
10.1016/j.physletb.2022.137350
| null |
hep-th
|
http://creativecommons.org/licenses/by/4.0/
|
We present three different Type IIB AdS$_4$ Supergravity solutions, derived
using the electrostatic-like problem formalism which preserves 8 Poincar\'{e}
Supercharges. Two of these solutions correspond to the Abelian and non-Abelian
T-duals of a Type IIA background, obtained from the dimensional reduction of
11D AdS$_4 \times S^7$ Supegravity. The third solution is a new background with
some special properties. We compute the Page charges in each case, and provide
brane set-up descriptions of the geometries. Also, we argue that the
non-Abelian T-dual can be understood as a zoom-in of a more general background
with a well defined holographic dual.
|
[{'version': 'v1', 'created': 'Mon, 20 Dec 2021 21:33:44 GMT'}
{'version': 'v2', 'created': 'Tue, 11 Jan 2022 10:45:05 GMT'}]
|
2022-08-03
|
[array(['Merrikin', 'Paul', ''], dtype=object)
array(['Stuardo', 'Ricardo', ''], dtype=object)]
|
18,752 |
physics/0405108
|
Georg Hoffstaetter
|
Georg H. Hoffstaetter (Cornell University, Ithaca/NY), Mathias Vogt
(DESY, Hamburg/FRG)
|
Strength of Higher-Order Spin-Orbit Resonances
|
10 pages, 6 figures
|
Phys.Rev. E70 (2004) 056501
|
10.1103/PhysRevE.70.056501
| null |
physics.acc-ph
| null |
When polarized particles are accelerated in a synchrotron, the spin
precession can be periodically driven by Fourier components of the
electromagnetic fields through which the particles travel. This leads to
resonant perturbations when the spin-precession frequency is close to a linear
combination of the orbital frequencies. When such resonance conditions are
crossed, partial depolarization or spin flip can occur. The amount of
polarization that survives after resonance crossing is a function of the
resonance strength and the crossing speed. This function is commonly called the
Froissart-Stora formula. It is very useful for predicting the amount of
polarization after an acceleration cycle of a synchrotron or for computing the
required speed of the acceleration cycle to maintain a required amount of
polarization. However, the resonance strength could in general only be computed
for first-order resonances and for synchrotron sidebands. When Siberian Snakes
adjust the spin tune to be 1/2, as is required for high energy accelerators,
first-order resonances do not appear and higher-order resonances become
dominant. Here we will introduce the strength of a higher-order spin-orbit
resonance, and also present an efficient method of computing it. Several
tracking examples will show that the so computed resonance strength can indeed
be used in the Froissart-Stora formula. HERA-p is used for these examples which
demonstrate that our results are very relevant for existing accelerators.
|
[{'version': 'v1', 'created': 'Thu, 20 May 2004 18:24:37 GMT'}]
|
2009-11-10
|
[array(['Hoffstaetter', 'Georg H.', '', 'Cornell University, Ithaca/NY'],
dtype=object)
array(['Vogt', 'Mathias', '', 'DESY, Hamburg/FRG'], dtype=object)]
|
18,753 |
2003.10058
|
Jing Qian
|
Yichun Gao and Jianqin Xu and Jing Qian
|
Robust stability of quantum interference realized by coexisting detuned
and resonant STIRAPs
|
6 pages, 6 figures
| null | null | null |
physics.atom-ph physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inspired by a recent experiment [Phys. Rev. Letts. \textbf{122},
253201(2019)] that an unprecedented quantum interference was observed in the
way of Stimulated Raman adiabatic passage (STIRAP) due to the coexisting
resonant- and detuned-STIRAPs, we comprehensively study this effect for
uncovering its robustness towards the external-field fluctuations of laser
noise, imperfect resonance condition as well as the excited-state decaying. We
verify that, an auxiliary dynamical phase accumulated in hold time caused by
the quasi-dark state can sensitively manipulate the visibility and frequency of
the interference fringe, representing a new hallmark to measure the hyperfine
energy accurately. The robust stability of scheme comes from the intrinsic
superiority embedded in STIRAP itself, which promises a remarkable preservation
of the quantum interference quality in a practical implementation.
|
[{'version': 'v1', 'created': 'Mon, 23 Mar 2020 02:39:46 GMT'}]
|
2020-03-24
|
[array(['Gao', 'Yichun', ''], dtype=object)
array(['Xu', 'Jianqin', ''], dtype=object)
array(['Qian', 'Jing', ''], dtype=object)]
|
18,754 |
0808.2041
|
Fuqiang Wang
|
STAR Collaboration: B.I. Abelev, et al
|
Systematic Measurements of Identified Particle Spectra in pp, d+Au and
Au+Au Collisions from STAR
|
58 pages, 46 figures, 37 tables
|
Phys.Rev.C79:034909,2009
|
10.1103/PhysRevC.79.034909
| null |
nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Identified charged particle spectra of $\pi^{\pm}$, $K^{\pm}$, $p$ and
$\pbar$ at mid-rapidity ($|y|<0.1$) measured by the $\dedx$ method in the
STAR-TPC are reported for $pp$ and d+Au collisions at $\snn = 200$ GeV and for
Au+Au collisions at 62.4 GeV, 130 GeV, and 200 GeV. ... [Shortened for arXiv
list. Full abstract in manuscript.]
|
[{'version': 'v1', 'created': 'Thu, 14 Aug 2008 18:54:09 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Apr 2009 05:31:20 GMT'}]
|
2009-08-05
|
[array(['STAR Collaboration', '', ''], dtype=object)
array(['Abelev', 'B. I.', ''], dtype=object)]
|
18,755 |
1707.08955
|
Jeffrey Meier
|
Jeffrey Meier and Alexander Zupan
|
Characterizing Dehn surgeries on links via trisections
|
15 pages, 4 color figures. Comments welcome!
|
Proc. Natl. Acad. Sci. USA 115 (2018), no. 43, 10887-10893
|
10.1073/pnas.1717187115
| null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We summarize and expand known connections between the study of Dehn surgery
on links and the study of trisections of closed, smooth 4-manifolds. In
addition, we describe how the potential counterexamples to the Generalized
Property R Conjecture given by Gompf, Scharlemann, and Thompson yield genus
four trisections of the standard four-sphere that are unlikely to be standard.
Finally, we give an analog of the Casson- Gordon Rectangle Condition for
trisections that can be used to obstruct reducibility of a given trisection.
|
[{'version': 'v1', 'created': 'Thu, 27 Jul 2017 17:58:15 GMT'}]
|
2022-10-19
|
[array(['Meier', 'Jeffrey', ''], dtype=object)
array(['Zupan', 'Alexander', ''], dtype=object)]
|
18,756 |
cond-mat/0307497
|
Young-June Kim
|
Young-June Kim, J. P. Hill, H. Benthien, F. H. L. Essler, E.
Jeckelmann, H. S. Choi, T. W. Noh, N. Motoyama, K. M. Kojima, S. Uchida, D.
Casa, and T. Gog
|
Resonant inelastic x-ray scattering study of holon-antiholon continuum
in SrCuO2
|
Final version to be published in Phys. Rev. Lett
|
Phys. Rev. Lett. 92, 137402 (2004)
|
10.1103/PhysRevLett.92.137402
| null |
cond-mat.str-el
| null |
We report a resonant inelastic x-ray scattering study of charge excitations
in the quasi-one-dimensional Mott insulator SrCuO2. We observe a continuum of
low-energy excitations, in which a highly dispersive feature with a large
sinusoidal dispersion (~1.1 eV) resides. We have also measured the optical
conductivity, and studied the dynamic response of the extended Hubbard model
with realistic parameters, using a dynamical density-matrix renormalization
group method. In contrast to earlier work, we do not find a long-lived exciton,
but rather these results suggest that the excitation spectrum comprises a
holon-antiholon continuum together with a broad resonance.
|
[{'version': 'v1', 'created': 'Mon, 21 Jul 2003 13:43:41 GMT'}
{'version': 'v2', 'created': 'Fri, 23 Jan 2004 14:45:36 GMT'}]
|
2009-11-10
|
[array(['Kim', 'Young-June', ''], dtype=object)
array(['Hill', 'J. P.', ''], dtype=object)
array(['Benthien', 'H.', ''], dtype=object)
array(['Essler', 'F. H. L.', ''], dtype=object)
array(['Jeckelmann', 'E.', ''], dtype=object)
array(['Choi', 'H. S.', ''], dtype=object)
array(['Noh', 'T. W.', ''], dtype=object)
array(['Motoyama', 'N.', ''], dtype=object)
array(['Kojima', 'K. M.', ''], dtype=object)
array(['Uchida', 'S.', ''], dtype=object)
array(['Casa', 'D.', ''], dtype=object)
array(['Gog', 'T.', ''], dtype=object)]
|
18,757 |
1708.03673
|
Seth Shelley-Abrahamson
|
Max Murin and Seth Shelley-Abrahamson
|
Parameters for Generalized Hecke Algebras in Type B
|
19 pages. v2: minor revisions. v3: minor revisions, final version, to
appear in the Journal of Algebra and Its Applications
| null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The irreducible representations of full support in the rational Cherednik
category $\mathcal{O}_c(W)$ attached to a Coxeter group $W$ are in bijection
with the irreducible representations of an associated Iwahori-Hecke algebra.
Recent work has shown that the irreducible representations in
$\mathcal{O}_c(W)$ of arbitrary given support are similarly governed by certain
generalized Hecke algebras. In this paper we compute the parameters for these
generalized Hecke algebras in the remaining previously unknown cases,
corresponding to the parabolic subgroup $B_n \times S_k$ in $B_{n+k}$ for $k
\geq 2$ and $n \geq 0$.
|
[{'version': 'v1', 'created': 'Fri, 11 Aug 2017 19:31:40 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Feb 2018 18:31:16 GMT'}
{'version': 'v3', 'created': 'Sat, 25 Aug 2018 16:09:02 GMT'}]
|
2018-08-28
|
[array(['Murin', 'Max', ''], dtype=object)
array(['Shelley-Abrahamson', 'Seth', ''], dtype=object)]
|
18,758 |
hep-ex/0404032
|
Vereshkov Gregory M.
|
G.M. Vereshkov, Yu.F. Novoseltsev
|
Estimation of charm production cross section in hadronic interactions at
high energies
|
7 pages, 3 figures
| null | null | null |
hep-ex
| null |
Results of processing experimental data on charm production in hadron-hadron
interactions are presented. The analysis is carried out within the frame of
phenomenological model of diffraction production and quark statistics based on
additive quark model (AQM). In low energy region sqrt s = 20 - 40GeV, the cross
sections si_ {pN to c bar cX} (s), si_ {pi N to c bar cX} (s) are fitted by
logarithmic function with the parameters connected by relationship of AQM.
At collider energies 200, 540, 900, 1800 GeV, the values of si_{bar pp to c
bar cX} (s) were obtained by a quark statistics method from the data on
diffraction dissociation. It is established, that logarithmic function with
universal numerical parameters describes the whole set of low-energy and
high-energy data with high accuracy. The expected values of cross sections are
si_{pp to c bar cX} = 250 pm 40 mu b and 355 pm 57 mu b at TEVATRON energy sqrt
{s} = 1.96 TeV and LHC energy sqrt {s} = 14 TeV accordingly. Opportunities of
use of the obtained results for calibration of a flux of "prompt" muons in
high-energy component of cosmic rays are discussed.
|
[{'version': 'v1', 'created': 'Sat, 24 Apr 2004 10:33:21 GMT'}]
|
2007-05-23
|
[array(['Vereshkov', 'G. M.', ''], dtype=object)
array(['Novoseltsev', 'Yu. F.', ''], dtype=object)]
|
18,759 |
2204.10653
|
Pierre Le Bris
|
Arnaud Guillin, Pierre Le Bris, Pierre Monmarch\'e
|
On systems of particles in singular repulsive interaction in dimension
one : log and Riesz gas
| null | null | null | null |
math.PR math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we prove the first quantitative uniform in time propagation
of chaos for a class of systems of particles in singular repulsive interaction
in dimension one that contains the Dyson Brownian motion. We start by
establishing existence and uniqueness for the Riesz gases, before proving
propagation of chaos with an original approach to the problem, namely coupling
with a Cauchy sequence type argument. We also give a general argument to turn a
result of weak propagation of chaos into a strong and uniform in time result
using the long time behavior and some bounds on moments, in particular enabling
us to get a uniform in time version of the result of C\'epa-L\'epingle.
|
[{'version': 'v1', 'created': 'Fri, 22 Apr 2022 11:48:29 GMT'}]
|
2022-04-25
|
[array(['Guillin', 'Arnaud', ''], dtype=object)
array(['Bris', 'Pierre Le', ''], dtype=object)
array(['Monmarché', 'Pierre', ''], dtype=object)]
|
18,760 |
1102.0334
|
Martin Frankland
|
Martin Frankland
|
Moduli spaces of 2-stage Postnikov systems
|
Version 3: Added conventions in section 1.3. Minor changes
| null |
10.1016/j.topol.2011.05.002
| null |
math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using the obstruction theory of Blanc-Dwyer-Goerss, we compute the moduli
space of realizations of 2-stage Pi-algebras concentrated in dimensions 1 and n
or in dimensions n and n+1. The main technical tools are Postnikov truncation
and connected covers of Pi-algebras, and their effect on Quillen cohomology.
|
[{'version': 'v1', 'created': 'Wed, 2 Feb 2011 01:23:56 GMT'}
{'version': 'v2', 'created': 'Fri, 4 Feb 2011 19:42:20 GMT'}
{'version': 'v3', 'created': 'Wed, 16 Feb 2011 00:29:59 GMT'}]
|
2014-07-11
|
[array(['Frankland', 'Martin', ''], dtype=object)]
|
18,761 |
2209.12128
|
Cory Shain
|
Cory Shain and William Schuler
|
A Deep Learning Approach to Analyzing Continuous-Time Systems
|
Main article: 12 pages, 1 table, 3 figures; Supplementary
Information: 54 pages, 6 tables, 30 figures
| null | null | null |
cs.LG cs.NE stat.ME stat.ML
|
http://creativecommons.org/licenses/by/4.0/
|
Scientists often use observational time series data to study complex natural
processes, but regression analyses often assume simplistic dynamics. Recent
advances in deep learning have yielded startling improvements to the
performance of models of complex processes, but deep learning is generally not
used for scientific analysis. Here we show that deep learning can be used to
analyze complex processes, providing flexible function approximation while
preserving interpretability. Our approach relaxes standard simplifying
assumptions (e.g., linearity, stationarity, and homoscedasticity) that are
implausible for many natural systems and may critically affect the
interpretation of data. We evaluate our model on incremental human language
processing, a domain with complex continuous dynamics. We demonstrate
substantial improvements on behavioral and neuroimaging data, and we show that
our model enables discovery of novel patterns in exploratory analyses, controls
for diverse confounds in confirmatory analyses, and opens up research questions
that are otherwise hard to study.
|
[{'version': 'v1', 'created': 'Sun, 25 Sep 2022 03:02:31 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Apr 2023 18:54:36 GMT'}]
|
2023-04-21
|
[array(['Shain', 'Cory', ''], dtype=object)
array(['Schuler', 'William', ''], dtype=object)]
|
18,762 |
2211.11214
|
Haitao Lin
|
Haitao Lin, Yufei Huang, Meng Liu, Xuanjing Li, Shuiwang Ji, Stan Z.
Li
|
DiffBP: Generative Diffusion of 3D Molecules for Target Protein Binding
|
13 pages
| null | null | null |
q-bio.BM cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
Generating molecules that bind to specific proteins is an important but
challenging task in drug discovery. Previous works usually generate atoms in an
auto-regressive way, where element types and 3D coordinates of atoms are
generated one by one. However, in real-world molecular systems, the
interactions among atoms in an entire molecule are global, leading to the
energy function pair-coupled among atoms. With such energy-based consideration,
the modeling of probability should be based on joint distributions, rather than
sequentially conditional ones. Thus, the unnatural sequentially auto-regressive
modeling of molecule generation is likely to violate the physical rules, thus
resulting in poor properties of the generated molecules. In this work, a
generative diffusion model for molecular 3D structures based on target proteins
as contextual constraints is established, at a full-atom level in a
non-autoregressive way. Given a designated 3D protein binding site, our model
learns the generative process that denoises both element types and 3D
coordinates of an entire molecule, with an equivariant network. Experimentally,
the proposed method shows competitive performance compared with prevailing
works in terms of high affinity with proteins and appropriate molecule sizes as
well as other drug properties such as drug-likeness of the generated molecules.
|
[{'version': 'v1', 'created': 'Mon, 21 Nov 2022 07:02:15 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Dec 2022 06:18:09 GMT'}
{'version': 'v3', 'created': 'Sat, 17 Dec 2022 08:29:11 GMT'}]
|
2022-12-20
|
[array(['Lin', 'Haitao', ''], dtype=object)
array(['Huang', 'Yufei', ''], dtype=object)
array(['Liu', 'Meng', ''], dtype=object)
array(['Li', 'Xuanjing', ''], dtype=object)
array(['Ji', 'Shuiwang', ''], dtype=object)
array(['Li', 'Stan Z.', ''], dtype=object)]
|
18,763 |
2101.11342
|
Yibo Yang
|
Yibo Yang, Shan You, Hongyang Li, Fei Wang, Chen Qian, Zhouchen Lin
|
Towards Improving the Consistency, Efficiency, and Flexibility of
Differentiable Neural Architecture Search
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Most differentiable neural architecture search methods construct a super-net
for search and derive a target-net as its sub-graph for evaluation. There
exists a significant gap between the architectures in search and evaluation. As
a result, current methods suffer from an inconsistent, inefficient, and
inflexible search process. In this paper, we introduce EnTranNAS that is
composed of Engine-cells and Transit-cells. The Engine-cell is differentiable
for architecture search, while the Transit-cell only transits a sub-graph by
architecture derivation. Consequently, the gap between the architectures in
search and evaluation is significantly reduced. Our method also spares much
memory and computation cost, which speeds up the search process. A feature
sharing strategy is introduced for more balanced optimization and more
efficient search. Furthermore, we develop an architecture derivation method to
replace the traditional one that is based on a hand-crafted rule. Our method
enables differentiable sparsification, and keeps the derived architecture
equivalent to that of Engine-cell, which further improves the consistency
between search and evaluation. Besides, it supports the search for topology
where a node can be connected to prior nodes with any number of connections, so
that the searched architectures could be more flexible. For experiments on
CIFAR-10, our search on the standard space requires only 0.06 GPU-day. We
further have an error rate of 2.22% with 0.07 GPU-day for the search on an
extended space. We can also directly perform the search on ImageNet with
topology learnable and achieve a top-1 error rate of 23.8% in 2.1 GPU-day.
|
[{'version': 'v1', 'created': 'Wed, 27 Jan 2021 12:16:47 GMT'}]
|
2021-01-28
|
[array(['Yang', 'Yibo', ''], dtype=object)
array(['You', 'Shan', ''], dtype=object)
array(['Li', 'Hongyang', ''], dtype=object)
array(['Wang', 'Fei', ''], dtype=object)
array(['Qian', 'Chen', ''], dtype=object)
array(['Lin', 'Zhouchen', ''], dtype=object)]
|
18,764 |
1704.00426
|
Frank Hansen
|
Frank Hansen, Jin Liang and Guanghua Shi
|
Peierls-Bogolyubov's inequality for deformed exponentials
|
Expanded to cover more cases of the parameters q and r
| null |
10.3390/e19060271
| null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study convexity or concavity of certain trace functions for the deformed
logarithmic and exponential functions, and obtain in this way new trace
inequalities for deformed exponentials that may be considered as
generalizations of Peierls-Bogolyubov's inequality. We use these results to
improve previously known lower bounds for the Tsallis relative entropy.
|
[{'version': 'v1', 'created': 'Mon, 3 Apr 2017 05:29:02 GMT'}
{'version': 'v2', 'created': 'Wed, 31 May 2017 09:42:59 GMT'}]
|
2017-08-02
|
[array(['Hansen', 'Frank', ''], dtype=object)
array(['Liang', 'Jin', ''], dtype=object)
array(['Shi', 'Guanghua', ''], dtype=object)]
|
18,765 |
0906.3323
|
Andriy Myronenko
|
Andriy Myronenko, Xubo Song
|
Adaptive Regularization of Ill-Posed Problems: Application to Non-rigid
Image Registration
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce an adaptive regularization approach. In contrast to conventional
Tikhonov regularization, which specifies a fixed regularization operator, we
estimate it simultaneously with parameters. From a Bayesian perspective we
estimate the prior distribution on parameters assuming that it is close to some
given model distribution. We constrain the prior distribution to be a
Gauss-Markov random field (GMRF), which allows us to solve for the prior
distribution analytically and provides a fast optimization algorithm. We apply
our approach to non-rigid image registration to estimate the spatial
transformation between two images. Our evaluation shows that the adaptive
regularization approach significantly outperforms standard variational methods.
|
[{'version': 'v1', 'created': 'Wed, 17 Jun 2009 23:24:38 GMT'}]
|
2009-06-19
|
[array(['Myronenko', 'Andriy', ''], dtype=object)
array(['Song', 'Xubo', ''], dtype=object)]
|
18,766 |
hep-ph/9704372
|
Boris Kopeliovich
|
B.Z. Kopeliovich, B. Povh (MPI-K, Heidelberg), E. Predazzi (Torino
Un.)
|
Unitarity effects in DIS
|
12 pages of Latex, including 1 figure. Based on a talk presented by
B.Z.K. at the Nevis Workshop on Leading Baryon Production, Columbia
University, New York, February 1997
|
Phys.Lett. B405 (1997) 361-366
|
10.1016/S0370-2693(97)00654-0
|
MPI H-V18-1997, DFTT-24/97
|
hep-ph
| null |
We argue that diffractive DIS, dominated by soft interactions, is probably
the unique process which allows us to observe unitarity effects in DIS. Guided
by a close analogy between the diffractive dissociation of a highly virtual
photon and the elastic scattering of hadrons we propose a specific procedure to
analyse the data in order to detect the onset of the unitarity limit. Lacking
appropriate data, we use the predictions of a realistic model as an input for
our analysis, to demonstrate that the output unitarity signal is sufficiently
large to be detectable.
|
[{'version': 'v1', 'created': 'Tue, 22 Apr 1997 07:20:13 GMT'}]
|
2009-10-30
|
[array(['Kopeliovich', 'B. Z.', '', 'MPI-K, Heidelberg'], dtype=object)
array(['Povh', 'B.', '', 'MPI-K, Heidelberg'], dtype=object)
array(['Predazzi', 'E.', '', 'Torino\n Un.'], dtype=object)]
|
18,767 |
1304.7152
|
Benjamin Cooper
|
Anna Beliakova and Benjamin Cooper
|
Steenrod Structures on Categorified Quantum Groups
|
27 pages
| null | null | null |
math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Categorified quantum groups play an increasing role in quantum topology and
representation theory. The Steenrod algebra is a fundamental component of
algebraic topology. In this paper we show that categorified quantum groups can
be extended to module categories over the Steenrod algebra in a natural way.
This yields an intepretation of the small quantum group by Khovanov and Qi.
|
[{'version': 'v1', 'created': 'Fri, 26 Apr 2013 13:03:38 GMT'}]
|
2013-04-29
|
[array(['Beliakova', 'Anna', ''], dtype=object)
array(['Cooper', 'Benjamin', ''], dtype=object)]
|
18,768 |
1810.11394
|
Philippe Bruel
|
P. Bruel, T. H. Burnett, S. W. Digel, G. Johannesson, N. Omodei, M.
Wood (on behalf of the Fermi-LAT Collaboration)
|
Fermi-LAT improved Pass~8 event selection
|
This paper corresponds to a poster that was presented at the 8th
International Fermi Symposium, October 14-19 2018, Baltimore
| null | null | null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The current version of the Fermi Large Area Telescope data (P8R2) has been
publicly available since June 2015, with the caveat that the residual
background of all event classes, except ULTRACLEANVETO, was not fully
isotropic: it was enhanced by a factor ~2 at 1-3 GeV within ~20 deg of the
Ecliptic compared to the poles. By investigating the residual background using
data only, we were able to find two sources of residual background: one due to
non-interacting heavy ions and one due to cosmic-ray electrons leaking through
the ribbons of the Anti-Coincidence Detector, the latter source being
responsible for the background anisotropy. A set of simple cuts allows us to
reject these events while losing less than 1% of the SOURCE class acceptance.
This new selection has been used to produce a new version of the LAT data
(P8R3).
|
[{'version': 'v1', 'created': 'Fri, 26 Oct 2018 15:41:05 GMT'}]
|
2018-11-27
|
[array(['Bruel', 'P.', '', 'on behalf of the Fermi-LAT Collaboration'],
dtype=object)
array(['Burnett', 'T. H.', '', 'on behalf of the Fermi-LAT Collaboration'],
dtype=object)
array(['Digel', 'S. W.', '', 'on behalf of the Fermi-LAT Collaboration'],
dtype=object)
array(['Johannesson', 'G.', '',
'on behalf of the Fermi-LAT Collaboration'], dtype=object)
array(['Omodei', 'N.', '', 'on behalf of the Fermi-LAT Collaboration'],
dtype=object)
array(['Wood', 'M.', '', 'on behalf of the Fermi-LAT Collaboration'],
dtype=object) ]
|
18,769 |
2202.08536
|
Hilde Weerts
|
Hilde Weerts, Lamb\`er Royakkers, Mykola Pechenizkiy
|
Does the End Justify the Means? On the Moral Justification of
Fairness-Aware Machine Learning
| null | null | null | null |
cs.LG cs.AI cs.CY
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Fairness-aware machine learning (fair-ml) techniques are algorithmic
interventions designed to ensure that individuals who are affected by the
predictions of a machine learning model are treated fairly, typically measured
in terms of a quantitative fairness metric. Despite the multitude of fairness
metrics and fair-ml algorithms, there is still little guidance on the
suitability of different approaches in practice. In this paper, we present a
framework for moral reasoning about the justification of fairness metrics and
explore the moral implications of the use of fair-ml algorithms that optimize
for them. In particular, we argue that whether a distribution of outcomes is
fair, depends not only on the cause of inequalities but also on what moral
claims decision subjects have to receive a particular benefit or avoid a
burden. We use our framework to analyze the suitability of two fairness metrics
under different circumstances. Subsequently, we explore moral arguments that
support or reject the use of the fair-ml algorithm introduced by Hardt et al.
(2016). We argue that under very specific circumstances, particular metrics
correspond to a fair distribution of burdens and benefits. However, we also
illustrate that enforcing a fairness metric by means of a fair-ml algorithm may
not result in the fair distribution of outcomes and can have several
undesirable side effects. We end with a call for a more holistic evaluation of
fair-ml algorithms, beyond their direct optimization objectives.
|
[{'version': 'v1', 'created': 'Thu, 17 Feb 2022 09:26:39 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Feb 2023 12:20:37 GMT'}]
|
2023-02-09
|
[array(['Weerts', 'Hilde', ''], dtype=object)
array(['Royakkers', 'Lambèr', ''], dtype=object)
array(['Pechenizkiy', 'Mykola', ''], dtype=object)]
|
18,770 |
0801.0013
|
Carl Henney
|
C. J. Henney, C. U. Keller, J. W. Harvey, M. K. Georgoulis, N. L.
Hadder, A. A. Norton, N.-E. Raouafi, R. M. Toussaint
|
SOLIS Vector Spectromagnetograph: status and science
|
4 pages, 2 figures, Solar Polarimetry Workshop 5, PASP
|
Solar Polarization 5, In ASP Conference Series, Vol. 405, 2009.,
p.47
| null | null |
astro-ph
| null |
The Vector Spectromagnetograph (VSM) instrument has been recording
photospheric and chromospheric magnetograms daily since August 2003. Full-disk
photospheric vector magnetograms are observed at least weekly and, since
November 2006, area-scans of active regions daily. Quick-look vector magnetic
images, plus X3D and FITS formated files, are now publicly available daily. In
the near future, Milne-Eddington inversion parameter data will also be
available and a typical observing day will include three full-disk photospheric
vector magnetograms. Besides full-disk observations, the VSM is capable of high
temporal cadence area-scans of both the photosphere and chromosphere.
Carrington rotation and daily synoptic maps are also available from the
photospheric magnetograms and coronal hole estimate images.
|
[{'version': 'v1', 'created': 'Fri, 28 Dec 2007 23:20:18 GMT'}]
|
2009-08-13
|
[array(['Henney', 'C. J.', ''], dtype=object)
array(['Keller', 'C. U.', ''], dtype=object)
array(['Harvey', 'J. W.', ''], dtype=object)
array(['Georgoulis', 'M. K.', ''], dtype=object)
array(['Hadder', 'N. L.', ''], dtype=object)
array(['Norton', 'A. A.', ''], dtype=object)
array(['Raouafi', 'N. -E.', ''], dtype=object)
array(['Toussaint', 'R. M.', ''], dtype=object)]
|
18,771 |
2009.13385
|
Jacopo Forneris
|
S. Ditalia Tchernij, T. L\"uhmann, E. Corte, F. Sardi, F. Picollo, P.
Traina, M. Brajkovic, A. Crnjac, S. Pezzagna, I. P. Degiovanni, E. Moreva, P.
Apr\`a, P. Olivero, Z. Siketi\'c, J. Meijer, M. Genovese, J. Forneris
|
Fluorine-based color centers in diamond
|
10 pages, 5 figures
| null |
10.1038/s41598-020-78436-6
| null |
cond-mat.mtrl-sci physics.app-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on the creation and characterization of the luminescence properties
of high-purity diamond substrates upon F ion implantation and subsequent
thermal annealing. Their room-temperature photoluminescence emission consists
of a weak emission line at 558 nm and of intense bands in the 600 - 750 nm
spectral range. Characterization at liquid He temperature reveals the presence
of a structured set of lines in the 600 - 670 nm spectral range. We discuss the
dependence of the emission properties of F-related optical centers on different
experimental parameters such as the operating temperature and the excitation
wavelength. The correlation of the emission intensity with F implantation
fluence, and the exclusive observation of the afore-mentioned spectral features
in F-implanted and annealed samples provides a strong indication that the
observed emission features are related to a stable F-containing defective
complex in the diamond lattice.
|
[{'version': 'v1', 'created': 'Mon, 28 Sep 2020 15:01:02 GMT'}
{'version': 'v2', 'created': 'Wed, 9 Dec 2020 11:50:04 GMT'}]
|
2020-12-10
|
[array(['Tchernij', 'S. Ditalia', ''], dtype=object)
array(['Lühmann', 'T.', ''], dtype=object)
array(['Corte', 'E.', ''], dtype=object)
array(['Sardi', 'F.', ''], dtype=object)
array(['Picollo', 'F.', ''], dtype=object)
array(['Traina', 'P.', ''], dtype=object)
array(['Brajkovic', 'M.', ''], dtype=object)
array(['Crnjac', 'A.', ''], dtype=object)
array(['Pezzagna', 'S.', ''], dtype=object)
array(['Degiovanni', 'I. P.', ''], dtype=object)
array(['Moreva', 'E.', ''], dtype=object)
array(['Aprà', 'P.', ''], dtype=object)
array(['Olivero', 'P.', ''], dtype=object)
array(['Siketić', 'Z.', ''], dtype=object)
array(['Meijer', 'J.', ''], dtype=object)
array(['Genovese', 'M.', ''], dtype=object)
array(['Forneris', 'J.', ''], dtype=object)]
|
18,772 |
dg-ga/9704017
|
Francis Bonahon
|
Francis Bonahon
|
A Schlafli-type formula for convex cores of hyperbolic 3-manifolds
|
18 pages, 3 pictures, AmsTeX
| null | null | null |
dg-ga math.DG
| null |
In 3-dimensional hyperbolic geometry, the classical Schlafli formula
expresses the variation of the volume of a hyperbolic polyhedron in terms of
the length of its edges and of the variation of its dihedral angles. We prove a
similar formula for the variation of the volume of the convex core of a
geometrically finite hyperbolic 3--manifold M, as we vary the hyperbolic metric
of M. In this case, the pleating locus of the boundary of the convex core is
not constant any more, but we showed in an earlier paper that the variation of
the bending of the boundary of the convex core is described by a geodesic
lamination with a certain transverse distribution. We prove that the variation
of the volume of the convex core is then equal to 1/2 the length of this
transverse distribution.
|
[{'version': 'v1', 'created': 'Wed, 30 Apr 1997 22:03:29 GMT'}]
|
2008-02-03
|
[array(['Bonahon', 'Francis', ''], dtype=object)]
|
18,773 |
1901.11179
|
Rafal Pilarczyk
|
Rafal Pilarczyk and Xin Chang and Wladyslaw Skarbek
|
Human Face Expressions from Images - 2D Face Geometry and 3D Face Local
Motion versus Deep Neural Features
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Several computer algorithms for recognition of visible human emotions are
compared at the web camera scenario using CNN/MMOD face detector. The
recognition refers to four face expressions: smile, surprise, anger, and
neutral. At the feature extraction stage, the following three concepts of face
description are confronted: (a) static 2D face geometry represented by its 68
characteristic landmarks (FP68); (b) dynamic 3D geometry defined by motion
parameters for eight distinguished face parts (denoted as AU8) of personalized
Candide-3 model; (c) static 2D visual description as 2D array of gray scale
pixels (known as facial raw image). At the classification stage, the
performance of two major models are analyzed: (a) support vector machine (SVM)
with kernel options; (b) convolutional neural network (CNN) with variety of
relevant tensor processing layers and blocks of them. The models are trained
for frontal views of human faces while they are tested for arbitrary head
poses. For geometric features, the success rate (accuracy) indicate nearly
triple increase of performance of CNN with respect to SVM classifiers. For raw
images, CNN outperforms in accuracy its best geometric counterpart (AU/CNN) by
about 30 percent while the best SVM solutions are inferior nearly four times.
For F-score the high advantage of raw/CNN over geometric/CNN and geometric/SVM
is observed, as well. We conclude that contrary to CNN based emotion
classifiers, the generalization capability wrt human head pose is for SVM based
emotion classifiers poor.
|
[{'version': 'v1', 'created': 'Thu, 31 Jan 2019 02:32:47 GMT'}]
|
2019-02-01
|
[array(['Pilarczyk', 'Rafal', ''], dtype=object)
array(['Chang', 'Xin', ''], dtype=object)
array(['Skarbek', 'Wladyslaw', ''], dtype=object)]
|
18,774 |
2008.05126
|
Ghulam Murtaza
|
G. Murtaza
|
Insights into the structural, electronic and optical properties of
X$_2$MgZ$_4$($X=$ Sc, Y; $Z=$ S, Se) spinel compounds: Materials for the
future optoelectronic applications
|
14 pages, 10 fugures
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Direct bandgap bulk materials are very important for the optical
applications. It is therefore important to predict new materials with the
desired properties. In the present work, density functional theory is applied
to study different physical properties of X$_2$MgZ$_4$($X=$ Sc, Y; $Z=$ S, Se)
spinel compounds. Generalized gradient approximation is used to analyze the
structural and elastic parameters while modified Becke Johnson exchange
potential is applied to calculate electric band profiles and optical
properties. All the studied compounds are stable in the cubic structure. Also
the energy bandgap is of direct nature. Therefore these compounds can find
useful applications in the optoelectrics devices. Optical properties of the
compounds are studied in terms of dielectric function, refractive index,
extinction coefficient, optical conductivity and reflectivity. The transport
parameters like electrical conductivity, Seebeck coefficient, and thermal
conductivity are also evaluated.
|
[{'version': 'v1', 'created': 'Wed, 12 Aug 2020 06:12:10 GMT'}]
|
2020-08-13
|
[array(['Murtaza', 'G.', ''], dtype=object)]
|
18,775 |
1006.5473
|
Marie Kratz
|
Shubhabrata Das, Marie Kratz
|
Alarm System for Insurance Companies: A Strategy for Capital Allocation
|
Keywords: alarm system, capital accumulation function, efficiency,
quantitative risk management, regulation, risk process, ruin probability. 29
pages, 9 figures
| null | null | null |
q-fin.RM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One possible way of risk management for an insurance company is to develop an
early and appropriate alarm system before the possible ruin. The ruin is
defined through the status of the aggregate risk process, which in turn is
determined by premium accumulation as well as claim settlement outgo for the
insurance company. The main purpose of this work is to design an effective
alarm system, i.e. to define alarm times and to recommend augmentation of
capital of suitable magnitude at those points to prevent or reduce the chance
of ruin. To draw a fair measure of effectiveness of alarm system, comparison is
drawn between an alarm system, with capital being added at the sound of every
alarm, and the corresponding system without any alarm, but an equivalently
higher initial capital. Analytical results are obtained in general setup and
this is backed up by simulated performances with various types of loss severity
distributions. This provides a strategy for suitably spreading out the capital
and yet addressing survivability concerns at satisfactory level.
|
[{'version': 'v1', 'created': 'Mon, 28 Jun 2010 21:24:09 GMT'}]
|
2010-06-30
|
[array(['Das', 'Shubhabrata', ''], dtype=object)
array(['Kratz', 'Marie', ''], dtype=object)]
|
18,776 |
1604.00661
|
Craig Timmons
|
Craig Timmons
|
Upper bounds for $B_h[g]$-sets with small $h$
|
11 pages, comments welcome
| null | null | null |
math.CO math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For $g \geq 2$ and $h \geq 3$, we give small improvements on the maximum size
of a $B_h[g]$-set contained in the interval $\{1,2, \dots , N \}$. In
particular, we show that a $B_3[g]$-set in $\{1,2, \dots , N \}$ has at most
$(14.3 g N)^{1/3}$ elements. The previously best known bound was $(16
gN)^{1/3}$ proved by Cilleruelo, Ruzsa, and Trujillo. We also introduce a
related optimization problem that may be of independent interest.
|
[{'version': 'v1', 'created': 'Sun, 3 Apr 2016 17:38:48 GMT'}]
|
2016-04-05
|
[array(['Timmons', 'Craig', ''], dtype=object)]
|
18,777 |
2303.15518
|
Anishya Harshan
|
Anishya Harshan, Kim-Vy Tran, Anshu Gupta, Glenn G. Kacprzak, Themiya
Nanayakkara
|
ZFIRE -- The Gas Inflow Inequality for Satellite Galaxies in Cluster and
Field Halos at z = 2
|
Accepted for Publication in MNRAS
| null |
10.1093/mnras/stad959
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by/4.0/
|
Gas inflow into galaxies should affect the star formation and hence the
evolution of galaxies across cosmic time. In this work, we use TNG100 of the
IllustrisTNG simulations to understand the role of environment on gas inflow
rates in massive galaxies at z >= 2. We divide our galaxies (log(M*/Msolar )>=
10.5) into cluster (log Mhalo/Msolar >= 13) and field (log Mhalo/Msolar < 13)
galaxies at z = 2 and further divide into centrals and satellites. We track
their gas inflow rates from z = 6 to 2 and find that the total gas inflow rates
of satellite galaxies rapidly decline after their infall into cluster halos and
as they reach the cluster center. At z = 2, the gas inflow rate of cluster
satellite galaxies is correlated with the cluster-centric radii and not the
host halo mass. In contrast, the gas inflow rate in centrals is strongly
correlated with the host halo mass at z >= 2. Our study indicates that between
redshifts 6 to 2, the gas that normally is accreted by the satellite galaxies
is redirected to the center of the cluster halo as inflows to the cluster
centrals and forming the intra-cluster medium. Our analysis suggest that the
inequality of gas accretion between massive satellite and central galaxies is
responsible for the starvation of cluster satellite galaxies that evolve into
the massive quenched cluster galaxies observed at z<0.5.
|
[{'version': 'v1', 'created': 'Mon, 27 Mar 2023 18:00:20 GMT'}]
|
2023-04-12
|
[array(['Harshan', 'Anishya', ''], dtype=object)
array(['Tran', 'Kim-Vy', ''], dtype=object)
array(['Gupta', 'Anshu', ''], dtype=object)
array(['Kacprzak', 'Glenn G.', ''], dtype=object)
array(['Nanayakkara', 'Themiya', ''], dtype=object)]
|
18,778 |
physics/9910025
|
Steven Bradley Lowen
|
Steven B. Lowen, Tsuyoshi Ozaki, Ehud Kaplan, Bahaa E. A. Saleh,
Malvin C. Teich
|
Fractal features of dark, maintained, and driven neural discharges in
the cat visual system
|
21 pages, 7 figures
|
Methods 24, 377-394 (2001)
| null | null |
physics.bio-ph q-bio.NC q-bio.QM
| null |
We employ a number of statistical measures to characterize neural discharge
activity in cat retinal ganglion cells (RGCs) and in their target lateral
geniculate nucleus (LGN) neurons under various stimulus conditions, and we
develop a new measure to examine correlations in fractal activity between
spike-train pairs. In the absence of stimulation (i.e., in the dark), RGC and
LGN discharges exhibit similar properties. The presentation of a constant,
uniform luminance to the eye reduces the fractal fluctuations in the RGC
maintained discharge but enhances them in the target LGN discharge, so that
neural activity in the pair no longer mirror each other. A drifting-grating
stimulus yields RGC and LGN driven spike trains similar in character to those
observed in the maintained discharge, with two notable distinctions: action
potentials are reorganized along the time axis so that they occur only during
certain phases of the stimulus waveform, and fractal activity is suppressed.
Under both uniform-luminance and drifting-grating stimulus conditions (but not
in the dark), the discharges of pairs of LGN cells are highly correlated over
long time scales; in contrast discharges of RGCs are nearly uncorrelated with
each other. This indicates that action-potential activity at the LGN is subject
to a common fractal modulation to which the RGCs are not subjected.
|
[{'version': 'v1', 'created': 'Mon, 18 Oct 1999 16:15:38 GMT'}]
|
2007-05-23
|
[array(['Lowen', 'Steven B.', ''], dtype=object)
array(['Ozaki', 'Tsuyoshi', ''], dtype=object)
array(['Kaplan', 'Ehud', ''], dtype=object)
array(['Saleh', 'Bahaa E. A.', ''], dtype=object)
array(['Teich', 'Malvin C.', ''], dtype=object)]
|
18,779 |
1909.00454
|
Daniel Riveline
|
Alka Bhat, Linjie Lu, Chen-Ho Wang, Simon Lo Vecchio, Riccardo
Maraspini, Alf Honigmann and Daniel Riveline
|
How to orient cells in micro-cavities for high resolution imaging of
cytokinesis and lumen formation
| null |
Eur. Phys. J. E (2020) 43:31
|
10.1016/bs.mcb.2020.01.002
| null |
q-bio.QM eess.IV
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Imaging dynamics of cellular morphogenesis with high spatial-temporal
resolution in 3D is challenging, due to the low spatial resolution along the
optical axis and photo-toxicity. However, some cellular structures are planar
and hence 2D imaging should be sufficient, provided that the structure of
interest can be oriented with respect to the optical axis of the microscope.
Here, we report a 3D microfabrication method which positions and orients cell
divisions very close to the microscope coverglass. We use this approach to
study cytokinesis in fission yeasts and polarization to lumen formation in
mammalian epithelial cells. We show that this method improves spatial
resolution on range of common microscopies, including super-resolution STED.
Altogether, this method could shed new lights on self-organization phenomena in
single cells and 3D cell culture systems.
|
[{'version': 'v1', 'created': 'Sun, 1 Sep 2019 19:21:20 GMT'}]
|
2020-07-14
|
[array(['Bhat', 'Alka', ''], dtype=object)
array(['Lu', 'Linjie', ''], dtype=object)
array(['Wang', 'Chen-Ho', ''], dtype=object)
array(['Vecchio', 'Simon Lo', ''], dtype=object)
array(['Maraspini', 'Riccardo', ''], dtype=object)
array(['Honigmann', 'Alf', ''], dtype=object)
array(['Riveline', 'Daniel', ''], dtype=object)]
|
18,780 |
1911.11685
|
Ivan Garcia
|
Manuel Hinojosa, Iv\'an Garc\'ia, Ignacio Rey-Stolle and Carlos Algora
|
Inverted rear-heterojunction GaInP solar cells using Te memory effect
| null | null |
10.1016/j.solmat.2019.110235
| null |
physics.app-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Tellurium allows attaining heavy n-type doping levels in GaAs, which is
suited to achieve very low contact resistivities in solar cells. Besides, it
modifies the energy bandgap of MOVPE-grown GaInP by reducing the group-III
sublattice ordering and presents a strong memory effect which induces residual
n-type doping in subsequent layers, potentially detrimental to the performance
of the solar cell. In this work, we present an inverted rear-heterojunction
GaInP solar cell that employs a thick Te-doped GaInP layer as absorber, with a
doping profile obtained exclusively by controlling the memory effect of Te
coming from the preceding growth of a heavily doped GaAs contact layer. In this
way, GaInP is partially disordered with the use of no additional surfactant,
leading to an increase in the solar cell bandgap of around 35 meV as compared
to traditional samples doped with silicon. In the proof-of-concept experimental
devices developed so far, the use of a rear-heterojunction configuration and
the bandgap increase results in a global open-circuit voltage enhancement of
109 mV. The photocurrent decreases by 1.32 mA/cm2, mostly due to the bandgap
blue-shift, with about 0.35 mA/cm2 attributable to lower carrier collection
efficiencies. These preliminary results are discussed by analyzing the I-V
curve parameters and quantum efficiencies of a Te-doped rear-heterojunction, a
Si-doped rear-heterojunction and a Si-doped front-junction solar cell. An
additional advantage is that the emitter sheet resistance is reduced from 551
to 147 ohms/sq, which offers potential for higher efficiencies through lower
front grid shadowing factors, as demonstrated with the concentrator
measurements presented.
|
[{'version': 'v1', 'created': 'Tue, 26 Nov 2019 16:41:44 GMT'}]
|
2019-11-27
|
[array(['Hinojosa', 'Manuel', ''], dtype=object)
array(['García', 'Iván', ''], dtype=object)
array(['Rey-Stolle', 'Ignacio', ''], dtype=object)
array(['Algora', 'Carlos', ''], dtype=object)]
|
18,781 |
2012.04942
|
Abderrahim Hantoute
|
R. Correa, A. Hantoute and M.A. L\'opez
|
Alternative representations of the normal cone to the domain of supremum
functions and subdifferential calculus
| null | null | null | null |
math.OC
|
http://creativecommons.org/licenses/by/4.0/
|
The first part of the paper provides new characterizations of the normal cone
to the effective domain of the supremum of an arbitrary family of convex
functions. These results are applied in the second part to give new formulas
for the subdifferential of the supremum function, which use both the active and
nonactive functions at the reference point. Only the data functions are
involved in these characterizations, the active ones from one side, together
with the nonactive functions multiplied by some appropriate parameters. In
contrast with previous works in the literature, the main feature of our
subdifferential characterization is that the normal cone to the effective
domain of the supremum (or to finite-dimensional sections of this domain) does
not appear. A new type of optimality conditions for convex optimization is
established at the end of the paper.
|
[{'version': 'v1', 'created': 'Wed, 9 Dec 2020 09:52:38 GMT'}]
|
2020-12-10
|
[array(['Correa', 'R.', ''], dtype=object)
array(['Hantoute', 'A.', ''], dtype=object)
array(['López', 'M. A.', ''], dtype=object)]
|
18,782 |
2004.05199
|
Marvin Eisenberger
|
Marvin Eisenberger, Daniel Cremers
|
Hamiltonian Dynamics for Real-World Shape Interpolation
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit the classical problem of 3D shape interpolation and propose a
novel, physically plausible approach based on Hamiltonian dynamics. While most
prior work focuses on synthetic input shapes, our formulation is designed to be
applicable to real-world scans with imperfect input correspondences and various
types of noise. To that end, we use recent progress on dynamic thin shell
simulation and divergence-free shape deformation and combine them to address
the inverse problem of finding a plausible intermediate sequence for two input
shapes. In comparison to prior work that mainly focuses on small distortion of
consecutive frames, we explicitly model volume preservation and momentum
conservation, as well as an anisotropic local distortion model. We argue that,
in order to get a robust interpolation for imperfect inputs, we need to model
the input noise explicitly which results in an alignment based formulation.
Finally, we show a qualitative and quantitative improvement over prior work on
a broad range of synthetic and scanned data. Besides being more robust to noisy
inputs, our method yields exactly volume preserving intermediate shapes, avoids
self-intersections and is scalable to high resolution scans.
|
[{'version': 'v1', 'created': 'Fri, 10 Apr 2020 18:38:52 GMT'}]
|
2020-04-14
|
[array(['Eisenberger', 'Marvin', ''], dtype=object)
array(['Cremers', 'Daniel', ''], dtype=object)]
|
18,783 |
2006.08519
|
Raphael F. Ribeiro
|
Raphael F. Ribeiro, Jorge A. Campos-Gonzalez-Angulo, Noel C. Giebink,
Wei Xiong, Joel Yuen-Zhou
|
Enhanced optical nonlinearities under strong light-matter coupling
| null |
Phys. Rev. A 103, 063111 (2021)
|
10.1103/PhysRevA.103.063111
| null |
physics.chem-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Optical microcavities and metallic nanostructures have been shown to
significantly modulate the dynamics and spectroscopic response of molecular
systems. We present a study of the nonlinear optics of a model consisting of
$N$ anharmonic multilevel systems (e.g., Morse oscillators) undergoing
collective strong coupling with a resonant infrared microcavity. We find that,
under experimentally accessible conditions, molecular systems in microcavities
may have nonlinear phenomena significantly intensified due to the high quality
of polariton resonances and the enhanced microcavity electromagnetic energy
density relative to free space. Particularly large enhancement of multiphoton
absorption happens when multipolariton states are resonant with bare molecule
multiphoton transitions. In particular, our model predicts two-photon
absorption cross section enhancements by several orders of magnitude relative
to free space when the Rabi splitting $\Omega_R$ is approximately equal to the
molecular anharmonic shift $2\Delta$. Our results provide rough upper bounds to
resonant nonlinear response enhancement factors as relaxation to dark states is
treated phenomenologically. Notably, ensembles of two-level systems undergoing
strong coupling with a cavity (described by the Tavis-Cummings model) show no
such optical nonlinearity enhancements, highlighting the rich phenomenology
afforded by multilevel anharmonic systems. Similar conclusions are expected to
hold for excitonic systems that share features with our model (e.g., molecular
dyes with accessible S_0 -> S_1 -> S_2 transitions) and strongly interact with
a UV-visible cavity.
|
[{'version': 'v1', 'created': 'Mon, 15 Jun 2020 16:21:58 GMT'}]
|
2021-06-23
|
[array(['Ribeiro', 'Raphael F.', ''], dtype=object)
array(['Campos-Gonzalez-Angulo', 'Jorge A.', ''], dtype=object)
array(['Giebink', 'Noel C.', ''], dtype=object)
array(['Xiong', 'Wei', ''], dtype=object)
array(['Yuen-Zhou', 'Joel', ''], dtype=object)]
|
18,784 |
cs/0602016
|
Christoph D\"urr
|
Christoph Durr and Mathilde Hurand
|
Finding total unimodularity in optimization problems solved by linear
programs
| null | null | null | null |
cs.DS cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A popular approach in combinatorial optimization is to model problems as
integer linear programs. Ideally, the relaxed linear program would have only
integer solutions, which happens for instance when the constraint matrix is
totally unimodular. Still, sometimes it is possible to build an integer
solution with the same cost from the fractional solution. Examples are two
scheduling problems and the single disk prefetching/caching problem. We show
that problems such as the three previously mentioned can be separated into two
subproblems: (1) finding an optimal feasible set of slots, and (2) assigning
the jobs or pages to the slots. It is straigthforward to show that the latter
can be solved greedily. We are able to solve the former with a totally
unimodular linear program, from which we obtain simple combinatorial algorithms
with improved worst case running time.
|
[{'version': 'v1', 'created': 'Mon, 6 Feb 2006 09:09:03 GMT'}
{'version': 'v2', 'created': 'Fri, 2 Jun 2006 13:58:41 GMT'}
{'version': 'v3', 'created': 'Tue, 14 Apr 2009 06:25:26 GMT'}]
|
2009-09-29
|
[array(['Durr', 'Christoph', ''], dtype=object)
array(['Hurand', 'Mathilde', ''], dtype=object)]
|
18,785 |
astro-ph/9912341
|
Marigo Paola
|
Paola Marigo
|
Chemical yields from low- and intermediate-mass stars
|
6 pages, 4 postscript figures, to appear in "The chemical evolution
of the Milky Way: stars versus clusters", Proceedings of the Roma-Trieste
Workshop, (Vulcano, September 1999), eds. F. Matteucci and F. Giovannelli
| null |
10.1007/978-94-010-0938-6_47
| null |
astro-ph
| null |
We present new sets of chemical yields from low- and intermediate-mass stars
with 0.8 Msun <= M <= Mup ~ 5 Msun, and three choices of the metallicity,
Z=0.02, Z=0.008, and Z=0.004 (Marigo 2000, in preparation). These are then
compared with the yields calculated by other authors on the basis of different
model prescriptions, and basic observational constraints which should be
reproduced.
|
[{'version': 'v1', 'created': 'Thu, 16 Dec 1999 09:16:05 GMT'}]
|
2016-01-27
|
[array(['Marigo', 'Paola', ''], dtype=object)]
|
18,786 |
1104.2414
|
Mikhail Veshchunov S.
|
Mikhail S. Veshchunov
|
A new approach to the theory of Brownian coagulation and
diffusion-limited reactions
|
2 parts, 122 pages, 30 figures
| null | null | null |
physics.chem-ph cond-mat.stat-mech physics.bio-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An overview of the author's papers on the new approach to the Brownian
coagulation theory and its generalization to the diffusion-limited reaction
rate theory is presented. The traditional diffusion approach of the
Smoluchowski theory for coagulation of colloids is critically analyzed and
shown to be valid only in the particular case of coalescence of small particles
with large ones. It is shown that, owing to rapid diffusion mixing, coalescence
of comparable size particles occurs in the kinetic regime, realized under
condition of homogeneous spatial distribution of particles, in the two modes,
continuum and free molecular. Transition from the continuum to the free
molecular mode can be described by the interpolation expression derived within
the new analytical approach with fitting parameters that can be specified
numerically, avoiding semi-empirical assumptions of the traditional models. A
similar restriction arises in the traditional approach to the diffusion-limited
reaction rate theory, based on generalization of the Smoluchowski theory for
coagulation of colloids. In particular, it is shown that the traditional
approach is applicable only to the special case of reactions with a large
reaction radius, and becomes inappropriate to calculation of the reaction rate
in the case of a relatively small reaction radius. In the latter, more general
case particles collisions occur mainly in the kinetic regime (rather than in
the diffusion one) characterized by homogeneous (at random) spatial
distribution of particles. The calculated reaction rate for a small reaction
radius in 3-d formally coincides with the expression derived in the traditional
approach for reactions with a large reaction radius, however, notably deviates
at large times from the traditional result in the plane (2-d) geometry, that
has wide applications also in the membrane biology as well as in some other
important areas.
|
[{'version': 'v1', 'created': 'Wed, 13 Apr 2011 08:35:00 GMT'}
{'version': 'v2', 'created': 'Fri, 20 May 2011 09:25:48 GMT'}
{'version': 'v3', 'created': 'Sat, 10 Dec 2011 07:37:41 GMT'}
{'version': 'v4', 'created': 'Sat, 28 Jan 2012 09:20:03 GMT'}
{'version': 'v5', 'created': 'Sat, 21 May 2016 16:50:11 GMT'}]
|
2016-05-24
|
[array(['Veshchunov', 'Mikhail S.', ''], dtype=object)]
|
18,787 |
gr-qc/0608122
|
Zhao Ren
|
Zhao Ren, Zhang Sheng-Li
|
Canonical entropy of three-dimensional BTZ black hole
|
10 pages
|
Phys.Lett.B641:318-322,2006
|
10.1016/j.physletb.2006.08.068
| null |
gr-qc
| null |
Recently, Hawking radiation of the black hole has been studied using the
tunnel effect method. It is found that the radiation spectrum of the black hole
is not a strictly pure thermal spectrum. How does the departure from pure
thermal spectrum affect the entropy? This is a very interesting problem. In
this paper, we calculate the partition function by energy spectrum obtained
from tunnel effect. Using the partition function, we compute the black hole
entropy and derive the expression of the black hole entropy after considering
the radiation. And we derive the entropy of charged black hole. In our
calculation, we consider not only the correction to the black hole entropy due
to fluctuation of energy but also the effect of the change of the black hole
charges on entropy. There is no other hypothesis. Our result is more
reasonable.According to the fact that the black hole entropy is not divergent,
we obtain the lower limit of Banados-Teitelboim-Zanelli black hole energy. That
is, the least energy of Banados-Teitelboim-Zanelli black hole, which satisfies
the stationary condition in thermodynamics.
|
[{'version': 'v1', 'created': 'Tue, 29 Aug 2006 02:17:36 GMT'}]
|
2008-11-26
|
[array(['Ren', 'Zhao', ''], dtype=object)
array(['Sheng-Li', 'Zhang', ''], dtype=object)]
|
18,788 |
1008.1145
|
Vasanthan Raghavan
|
Vasanthan Raghavan, Venu Veeravalli, Stephen Hanly
|
Linear Beamforming for the Spatially Correlated MISO broadcast channel
|
Published in IEEE ISIT 2010, 5 pages
| null |
10.1109/ISIT.2010.5513553
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A spatially correlated broadcast setting with M antennas at the base station
and M users (each with a single antenna) is considered. We assume that the
users have perfect channel information about their links and the base station
has only statistical information about each user's link. The base station
employs a linear beamforming strategy with one spatial eigen-mode allocated to
each user. The goal of this work is to understand the structure of the
beamforming vectors that maximize the ergodic sum-rate achieved by treating
interference as noise. In the M = 2 case, we first fix the beamforming vectors
and compute the ergodic sum-rate in closed-form as a function of the channel
statistics. We then show that the optimal beamforming vectors are the dominant
generalized eigenvectors of the covariance matrices of the two links. It is
difficult to obtain intuition on the structure of the optimal beamforming
vectors for M > 2 due to the complicated nature of the sum-rate expression.
Nevertheless, in the case of asymptotic M, we show that the optimal beamforming
vectors have to satisfy a set of fixed-point equations.
|
[{'version': 'v1', 'created': 'Fri, 6 Aug 2010 09:23:19 GMT'}]
|
2016-11-17
|
[array(['Raghavan', 'Vasanthan', ''], dtype=object)
array(['Veeravalli', 'Venu', ''], dtype=object)
array(['Hanly', 'Stephen', ''], dtype=object)]
|
18,789 |
astro-ph/0105299
|
Andreas Burkert
|
Andreas Burkert (MPIA, Heidelberg)
|
The Formation of the Milky Way in the Cosmological Context
|
5 pages, conference proceeding. to appear in "Cosmic Evolution", eds.
M. Lemoine and E. Vangioni-Flam
| null |
10.1142/9789812810830_0059
| null |
astro-ph
| null |
The formation of the Milky Way is discussed within the context of the cold
dark matter scenario. Several problems arise which can be solved if the Galaxy
experienced an early phase of gas heating and decoupling from the dark matter
substructure. This model combines the Eggen, Lynden-Bell and Sandage picture of
a monolithic protogalactic collapses with the Searle and Zinn picture of an
early merging phase of substructures into one consistent scenario of Galactic
formation.
|
[{'version': 'v1', 'created': 'Thu, 17 May 2001 08:01:48 GMT'}]
|
2016-11-03
|
[array(['Burkert', 'Andreas', '', 'MPIA, Heidelberg'], dtype=object)]
|
18,790 |
1906.08783
|
Riccardo Spinelli
|
R. Spinelli, F. Borsa, G. Ghirlanda, G. Ghisellini, S. Campana, F.
Haardt, E. Poretti
|
The high-energy radiation environment of the habitable-zone super-Earth
LHS 1140b
|
6 pages, 4 figures, 2 tables. Accepted for pubblication in Astronomy
& Astrophysics
|
A&A 627, A144 (2019)
|
10.1051/0004-6361/201935636
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the last few years many exoplanets in the habitable zone (HZ) of M-dwarfs
have been discovered, but the X-ray/UV activity of cool stars is very different
from that of our Sun. The high-energy radiation environment influences the
habitability, plays a crucial role for abiogenesis, and impacts planetary
atmospheres. LHS 1140b is a super-Earth-size planet orbiting in the HZ of LHS
1140, an M4.5 dwarf at ~15 parsecs. We present the results of a Swift X-ray/UV
observing campaign. We characterize for the first time the X-ray/UV radiation
environment of LHS 1140b. We measure the variability of the near ultraviolet
(NUV) flux and estimate the far ultraviolet (FUV) flux with a correlation
between FUV and NUV flux of a sample of low-mass stars in the GALEX archive. We
highlight the presence of a dominating X-ray source close to the J2000
coordinates of LHS 1140, characterize its spectrum, and derive an X-ray flux
upper limit for LHS 1140. We find that this contaminant source could have
influenced the previously estimated spectral energy distribution. No
significant variation of the NUV flux of LHS 1140 is found over 3 months, and
we do not observe any flare during the 38 ks on the target. LHS 1140 is in the
25th percentile of least variable M4-M5 dwarfs of the GALEX sample. Analyzing
the UV flux experienced by the HZ planet LHS 1140b, we find that outside the
atmosphere it receives a NUV flux <2% with respect to that of the present-day
Earth, while the FUV/NUV ratio is ~100-200 times higher. This represents a
lower limit to the true FUV/NUV ratio since the GALEX FUV band does not include
Lyman-alpha, which dominates the FUV output of low-mass stars. This is a
warning for future searches for biomarkers, which must take into account this
high ratio. The relatively low level and stability of UV flux experienced by
LHS 1140b should be favorable for its present-day habitability.
|
[{'version': 'v1', 'created': 'Thu, 20 Jun 2019 18:00:02 GMT'}]
|
2019-07-17
|
[array(['Spinelli', 'R.', ''], dtype=object)
array(['Borsa', 'F.', ''], dtype=object)
array(['Ghirlanda', 'G.', ''], dtype=object)
array(['Ghisellini', 'G.', ''], dtype=object)
array(['Campana', 'S.', ''], dtype=object)
array(['Haardt', 'F.', ''], dtype=object)
array(['Poretti', 'E.', ''], dtype=object)]
|
18,791 |
cond-mat/0304183
|
Michele Fabrizio
|
Claudio Attaccalite and Michele Fabrizio
|
Properties of Gutzwiller wave-functions for multi-band models
|
29 pages
| null |
10.1103/PhysRevB.68.155117
| null |
cond-mat.str-el
| null |
We analyze the Mott transition in multi-band Hubbard models with the
inclusion of multiplet exchange splittings as it arises in infinite dimensions
by using the generalized Gutzwiller wave-function introduced by B\"unemann,
Weber and Gebhard [Phys. Rev. B 57, 6896 (1998)]. We also present an extension
of that variational wave-function to account for broken-symmetry phases, which
still allows an exact analytical treatment. Our analysis reveals some drawbacks
of the variational wave-function, which, in our opinion, imply that
Gutzwiller-type of wave-functions do not properly capture quasi-particle
properties close to a Mott transition.
|
[{'version': 'v1', 'created': 'Tue, 8 Apr 2003 11:22:34 GMT'}]
|
2009-11-10
|
[array(['Attaccalite', 'Claudio', ''], dtype=object)
array(['Fabrizio', 'Michele', ''], dtype=object)]
|
18,792 |
1712.08430
|
Yun Jiang Dr
|
J\'er\'emy Bernon, Ligong Bian, Yun Jiang
|
A new insight into the phase transition in the early Universe with two
Higgs doublets
|
43 pages, 18 figures, minor revision and match to the published
version
| null |
10.1007/JHEP05(2018)151
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the electroweak phase transition in the alignment limit of the
CP-conserving two-Higgs-doublet model (2HDM) of Type I and Type II. The
effective potential is evaluated at one-loop, where the thermal potential
includes Daisy corrections and is reliably approximated by means of a sum of
Bessel functions. Both 1-stage and 2-stage electroweak phase transitions are
shown to be possible, depending on the pattern of the vacuum development as the
Universe cools down. For the 1-stage case focused on in this paper, we analyze
the properties of phase transition and discover that the field value of the
electroweak symmetry breaking vacuum at the critical temperature at which the
first order phase transition occurs is largely correlated with the vacuum depth
of the 1-loop potential at zero temperature.
We demonstrate that a strong first order electroweak phase transition
(SFOEWPT) in the 2HDM is achievable and establish benchmark scenarios leading
to different testable signatures at colliders. In addition, we verify that an
enhanced triple Higgs coupling (including loop corrections) is a typical
feature of the SFOPT driven by the additional doublet. As a result, SFOEWPT
might be able to be probed at the LHC and future lepton colliders through Higgs
pair production.
|
[{'version': 'v1', 'created': 'Fri, 22 Dec 2017 13:14:26 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Jan 2018 08:29:05 GMT'}
{'version': 'v3', 'created': 'Thu, 19 Apr 2018 16:56:30 GMT'}]
|
2018-07-04
|
[array(['Bernon', 'Jérémy', ''], dtype=object)
array(['Bian', 'Ligong', ''], dtype=object)
array(['Jiang', 'Yun', ''], dtype=object)]
|
18,793 |
1909.00159
|
Hongjin Wu
|
Hongjin Wu, Baojun Bian
|
Global boundedness of the curl for a p-curl system in convex domains
|
10 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study a semilinear system involving the curl operator in a
bounded and convex domain in $R^3$, which comes from the steady-state
approximation for Bean critical-state model for type-II superconductors. We
show the existence and the $L^{\infty}$ estimate for weak solutions to this
system.
|
[{'version': 'v1', 'created': 'Sat, 31 Aug 2019 07:41:07 GMT'}]
|
2019-09-04
|
[array(['Wu', 'Hongjin', ''], dtype=object)
array(['Bian', 'Baojun', ''], dtype=object)]
|
18,794 |
hep-th/9911148
|
Yves Brihaye
|
Y. Brihaye, B. Hartmann and J. Kunz
|
Gravitating monopole and black holes at intermediate Higgs masses
|
RevTeX, 7 pp, 7 figs., same results, description of the numerical
method added
|
Phys.Rev.D62:044008,2000
|
10.1103/PhysRevD.62.044008
| null |
hep-th
| null |
Self-gravitating SU(2) Higgs magnetic monopoles exist up to a critical value
of the ratio of the vector meson mass to the Planck mass, which depends on the
Higgs boson mass. At the critical value a critical solution with a degenerate
horizon is reached. As pointed out by Lue and Weinberg, there are two types of
critical solutions, with a transition at an intermediate Higgs boson mass. Here
we investigate this transition for black holes, and reconsider it for the case
of gravitating monopoles.
|
[{'version': 'v1', 'created': 'Thu, 18 Nov 1999 15:27:49 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Mar 2000 08:39:42 GMT'}]
|
2010-11-19
|
[array(['Brihaye', 'Y.', ''], dtype=object)
array(['Hartmann', 'B.', ''], dtype=object)
array(['Kunz', 'J.', ''], dtype=object)]
|
18,795 |
nucl-th/0309056
|
Azwinndini Muronga
|
Azwinndini Muronga
|
Shear Viscosity Coefficient from Microscopic Models
|
15 pages, 17 figures, corrected typos
|
Phys.Rev. C69 (2004) 044901
|
10.1103/PhysRevC.69.044901
| null |
nucl-th
| null |
The transport coefficient of shear viscosity is studied for a hadron matter
through microscopic transport model, the Ultra--relativistic Quantum Molecular
Dynamics (UrQMD), using the Green--Kubo formulas. Molecular--dynamical
simulations are performed for a system of light mesons in a box with periodic
boundary conditions. Starting from an initial state composed of $\pi, \eta
,\omega ,\rho ,\phi$ with a uniform phase--space distribution, the evolution
takes place through elastic collisions, production and annihilation. The system
approaches a stationary state of mesons and their resonances, which is
characterized by common temperature. After equilibration, thermodynamic
quantities such as the energy density, particle density, and pressure are
calculated. From such an equilibrated state the shear viscosity coefficient is
calculated from the fluctuations of stress tensor around equilibrium using
Green--Kubo relations. We do our simulations here at zero net baryon density so
that the equilibration times depend on the energy density. We do not include
hadron strings as degrees of freedom so as to maintain detailed balance. Hence
we do not get the saturation of temperature but this leads to longer
equilibration times.
|
[{'version': 'v1', 'created': 'Mon, 22 Sep 2003 08:26:10 GMT'}
{'version': 'v2', 'created': 'Tue, 2 Dec 2003 14:35:14 GMT'}]
|
2009-11-10
|
[array(['Muronga', 'Azwinndini', ''], dtype=object)]
|
18,796 |
1809.04826
|
Boris Adamczewski
|
Boris Adamczewski and Colin Faverjon
|
Mahler's method in several variables II: Applications to base change
problems and finite automata
|
47 pp
| null | null | null |
math.NT math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is the second part of a work devoted to the study of linear Mahler
systems in several variables from the perspective of transcendence and
algebraic independence. From the lifting theorem obtained in the first part, we
first derive a general result, showing that Mahler functions in several
variables, associated with transformations having multiplicatively dependent
spectral radii, take algebraic independent values at algebraic points provided
that these points are sufficiently independent. Then, we focus on applications
of this result and of the two main results of Part I of this work. Our main
application concerns problems about the representation of natural and real
numbers in integer bases involving automata theory. These can be translated in
terms of algebraic relations over $\overline{\mathbb Q}$ between values of
Mahler functions in one variable. We also apply our results to the algebraic
independence of Mahler functions and their specializations, and to the study of
the values of Hecke-Mahler series.
|
[{'version': 'v1', 'created': 'Thu, 13 Sep 2018 08:17:32 GMT'}]
|
2018-09-14
|
[array(['Adamczewski', 'Boris', ''], dtype=object)
array(['Faverjon', 'Colin', ''], dtype=object)]
|
18,797 |
1208.5814
|
Shirin Jalali
|
Shirin Jalali, Arian Maleki, Richard Baraniuk
|
Minimum Complexity Pursuit for Universal Compressed Sensing
| null | null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The nascent field of compressed sensing is founded on the fact that
high-dimensional signals with "simple structure" can be recovered accurately
from just a small number of randomized samples. Several specific kinds of
structures have been explored in the literature, from sparsity and group
sparsity to low-rankness. However, two fundamental questions have been left
unanswered, namely: What are the general abstract meanings of "structure" and
"simplicity"? And do there exist universal algorithms for recovering such
simple structured objects from fewer samples than their ambient dimension? In
this paper, we address these two questions. Using algorithmic information
theory tools such as the Kolmogorov complexity, we provide a unified definition
of structure and simplicity. Leveraging this new definition, we develop and
analyze an abstract algorithm for signal recovery motivated by Occam's
Razor.Minimum complexity pursuit (MCP) requires just O(3\kappa) randomized
samples to recover a signal of complexity \kappa and ambient dimension n. We
also discuss the performance of MCP in the presence of measurement noise and
with approximately simple signals.
|
[{'version': 'v1', 'created': 'Wed, 29 Aug 2012 00:19:40 GMT'}
{'version': 'v2', 'created': 'Fri, 5 Jul 2013 17:32:30 GMT'}]
|
2013-07-08
|
[array(['Jalali', 'Shirin', ''], dtype=object)
array(['Maleki', 'Arian', ''], dtype=object)
array(['Baraniuk', 'Richard', ''], dtype=object)]
|
18,798 |
1909.06303
|
Anton Rudakovskyi
|
Anton Rudakovskyi, Denys Savchenko, Maksym Tsizh
|
Can EDGES observation favour any dark matter model?
|
matches published version
| null |
10.1093/mnras/staa2194
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The recent detection of the 21-cm absorption signal by the EDGES
collaboration has been widely used to constrain the basic properties of dark
matter particles. However, extracting the parameters of the 21-cm absorption
signal relies on a chosen parametrization of the foreground radio emission.
Recently, the new parametrizations of the foreground and systematics have been
proposed, showing significant deviations of the 21-cm signal parameters from
those assumed by the original EDGES paper. In this paper, we consider this new
uncertainty, comparing the observed signal with the predictions of several dark
matter models, including the widely used cold dark matter model, 1-3 keV warm
dark matter models, and 7 keV sterile neutrino (SN7) model, capable of
producing the reported 3.5 keV line. We show that all these dark matter models
cannot be statistically distinguished using the available EDGES data.
|
[{'version': 'v1', 'created': 'Fri, 13 Sep 2019 15:51:39 GMT'}
{'version': 'v2', 'created': 'Mon, 4 Nov 2019 15:35:21 GMT'}
{'version': 'v3', 'created': 'Thu, 1 Oct 2020 18:05:05 GMT'}]
|
2020-10-05
|
[array(['Rudakovskyi', 'Anton', ''], dtype=object)
array(['Savchenko', 'Denys', ''], dtype=object)
array(['Tsizh', 'Maksym', ''], dtype=object)]
|
18,799 |
1407.7791
|
Sunil Kumar Tripathy Mr.
|
S. K. Tripathy
|
Late time Acceleration and Role of Skewness in Anisotropic models
|
15 pages, 4 figures, Astrophysics Space Science, 2014
|
Astrophys. Space Sci.(2014)350:367-374
|
10.1007/s10509-013-1727-4
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study cosmological models with anisotropy in expansion rates in the
context of the recent observations predicting an accelerating universe. In the
absence of any anisotropy in the cosmic fluid, it is shown that the role of
skewness in directional Hubble rates is crucial in deciding the behavior of the
model. We find that incorporation of skewness leads to a more evolving
effective equation of state parameter.
|
[{'version': 'v1', 'created': 'Sat, 26 Jul 2014 18:05:49 GMT'}]
|
2015-06-22
|
[array(['Tripathy', 'S. K.', ''], dtype=object)]
|
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