Unnamed: 0
int64 0
20k
| id
stringlengths 9
16
| submitter
stringlengths 1
50
⌀ | authors
stringlengths 5
15.2k
| title
stringlengths 7
294
| comments
stringlengths 1
682
⌀ | journal-ref
stringlengths 4
256
⌀ | doi
stringlengths 13
133
⌀ | report-no
stringlengths 2
187
⌀ | categories
stringlengths 5
90
| license
stringclasses 9
values | abstract
stringlengths 21
2.62k
| versions
stringlengths 62
2.35k
| update_date
stringlengths 10
10
| authors_parsed
stringlengths 39
44.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2,800 |
1408.3532
|
Arghavan Safavi-Naini
|
D. Grimmer, A. Safavi-Naini, B. Capogrosso-Sansone, and \c{S}. G.
S\"oyler
|
Quantum Phases of Soft-Core Dipolar Bosons in Optical Lattices
|
5 pages, 5 figures
| null | null | null |
cond-mat.stat-mech quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the phase diagram of a system of soft-core dipolar bosons confined
to a two-dimensional optical lattice layer. We assume that dipoles are aligned
perpendicular to the layer such that the dipolar interactions are purely
repulsive and isotropic. We consider the full dipolar interaction and perform
Path Integral Quantum Monte Carlo simulations using the Worm Algorithm. Besides
a superfluid phase, we find various solid and supersolid phases. We show that,
unlike what was found previously for the case of nearest-neighboring
interaction, supersolid phases are stabilized not only by doping the solids
with particles but with holes as well. We further study the stability of these
quantum phases against thermal fluctuations. Finally, we discuss pair formation
and the stability of the pair checkerboard phase formed in a bilayer geometry,
and suggest experimental conditions under which the pair checkerboard phase can
be observed.
|
[{'version': 'v1', 'created': 'Fri, 15 Aug 2014 13:32:03 GMT'}]
|
2014-08-18
|
[array(['Grimmer', 'D.', ''], dtype=object)
array(['Safavi-Naini', 'A.', ''], dtype=object)
array(['Capogrosso-Sansone', 'B.', ''], dtype=object)
array(['Söyler', 'Ş. G.', ''], dtype=object)]
|
2,801 |
2104.01234
|
Alfonso Chac\'on Rold\'an
|
A. Chacon, L. Heinen, M. Halder, A. Bauer, W. Simeth, S. M\"uhlbauer,
H. Berger, M. Garst, A. Rosch, and C. Pfleiderer
|
Observation of two independent skyrmion phases in a chiral magnetic
material
| null |
Nature Physics 14, 936 (2018)
|
10.1038/s41567-018-0184-y
| null |
cond-mat.str-el
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Magnetic materials can host skyrmions, which are topologically non-trivial
spin textures. In chiral magnets with cubic lattice symmetry, all
previously-observed skyrmion phases require thermal fluctuations to become
thermodynamically stable in bulk materials, and therefore exist only at
relatively high temperature, close to the helimagnetic transition temperature.
Other stabilization mechanisms require a lowering of the cubic crystal
symmetry. Here, we report the identification of a second skyrmion phase in
Cu$_{2}$OSeO$_{3}$ at low temperature and in the presence of an applied
magnetic field. The new skyrmion phase is thermodynamically disconnected from
the well-known, nearly-isotropic, high-temperature phase, and exists, in
contrast, when the external magnetic field is oriented along the
$\langle100\rangle$ crystal axis only. Theoretical modelling provides evidence
that the stabilization mechanism is given by well-known cubic anisotropy terms,
and accounts for an additional observation of metastable helices tilted away
from the applied field. The identification of two distinct skyrmion phases in
the same material and the generic character of the underlying mechanism suggest
a new avenue for the discovery, design, and manipulation of topological spin
textures.
|
[{'version': 'v1', 'created': 'Fri, 2 Apr 2021 21:01:18 GMT'}]
|
2021-04-06
|
[array(['Chacon', 'A.', ''], dtype=object)
array(['Heinen', 'L.', ''], dtype=object)
array(['Halder', 'M.', ''], dtype=object)
array(['Bauer', 'A.', ''], dtype=object)
array(['Simeth', 'W.', ''], dtype=object)
array(['Mühlbauer', 'S.', ''], dtype=object)
array(['Berger', 'H.', ''], dtype=object)
array(['Garst', 'M.', ''], dtype=object)
array(['Rosch', 'A.', ''], dtype=object)
array(['Pfleiderer', 'C.', ''], dtype=object)]
|
2,802 |
2203.08561
|
Arup Kumar Das
|
A. Dutta and A.K. Das
|
More on homotopy continuation method and discounted zero-sum stochastic
game with ARAT structure
| null | null | null | null |
math.OC
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper, we introduce a homotopy function to trace the trajectory by
applying modified homotopy continuation method for finding the solution of
two-person zero-sum discounted stochastic ARAT game. We show that the algorithm
has the higher order of convergence. For the proposed algorithm, the homotopy
path approaching the solution is smooth and bounded. Two numerical examples are
illustrated to show the effectiveness of the proposed algorithm.
|
[{'version': 'v1', 'created': 'Wed, 16 Mar 2022 11:48:01 GMT'}]
|
2022-03-17
|
[array(['Dutta', 'A.', ''], dtype=object)
array(['Das', 'A. K.', ''], dtype=object)]
|
2,803 |
quant-ph/9807028
|
Michael Jack
|
M. W. Jack, M. J. Collett, and D. F. Walls
|
Non-Markovian quantum trajectories for spectral detection
| null | null |
10.1103/PhysRevA.59.2306
| null |
quant-ph
| null |
We present a formulation of non-Markovian quantum trajectories for open
systems from a measurement theory perspective. In our treatment there are three
distinct ways in which non-Markovian behavior can arise; a mode dependent
coupling between bath (reservoir) and system, a dispersive bath, and by
spectral detection of the output into the bath. In the first two cases the
non-Markovian behavior is intrinsic to the interaction, in the third case the
non-Markovian behavior arises from the method of detection. We focus in detail
on the trajectories which simulate real-time spectral detection of the light
emitted from a localized system. In this case, the non-Markovian behavior
arises from the uncertainty in the time of emission of particles that are later
detected. The results of computer simulations of the spectral detection of the
spontaneous emission from a strongly driven two-level atom are presented.
|
[{'version': 'v1', 'created': 'Fri, 10 Jul 1998 10:14:51 GMT'}]
|
2009-10-31
|
[array(['Jack', 'M. W.', ''], dtype=object)
array(['Collett', 'M. J.', ''], dtype=object)
array(['Walls', 'D. F.', ''], dtype=object)]
|
2,804 |
1609.02712
|
Chuwen Xiao
|
C. W. Xiao
|
$J/\psi N$ interactions revisited and $\Lambda_b^0 \to J/\psi K^-
(\pi^-) p$ decays
|
More comments and references added. Welcome for comments
|
Phys. Rev. D 95, 014006 (2017)
|
10.1103/PhysRevD.95.014006
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently LHCb experiments confirmed the findings of the two $P_c$ states in
the $\Lambda_b^0 \to J/\psi p \pi^-$ decays. In the present work, we
investigate both the $\Lambda_b^0 \to J/\psi K^- p$ and the $\Lambda_b^0 \to
J/\psi p \pi^-$ decays, continuing the investigations of our former works on
the interactions of $J/\psi N$ with its coupled channels by considering the
s-/u- channel contributions. We obtain consistent results of the line-shape of
the $J/\psi N$ invariant mass distribution with the LHCb experiments, and
favour the $P_c (4450)$ state as a $\bar{D}^* \Sigma_c$ bound state with
$J=1/2^-$.
|
[{'version': 'v1', 'created': 'Fri, 9 Sep 2016 09:13:05 GMT'}
{'version': 'v2', 'created': 'Mon, 19 Sep 2016 09:44:17 GMT'}]
|
2017-01-11
|
[array(['Xiao', 'C. W.', ''], dtype=object)]
|
2,805 |
1907.01569
|
Tsung-Cheng Lu
|
Tsung-Cheng Lu and Tarun Grover
|
Structure of Quantum Entanglement at a Finite Temperature Critical Point
|
12 pages, 12 figures
|
Phys. Rev. Research 2, 043345 (2020)
|
10.1103/PhysRevResearch.2.043345
| null |
cond-mat.str-el cond-mat.stat-mech hep-th quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a scheme to characterize long-range quantum entanglement close to
a finite temperature critical point using tripartite entanglement negativity.
As an application, we study a model with mean-field Ising critical exponents
and find that the tripartite negativity does not exhibit any singularity in the
thermodynamic limit across the transition. This indicates that the
long-distance critical fluctuations are completely classical, allowing one to
define a `quantum correlation length' that remains finite at the transition
despite a divergent physical correlation length. Motivated by our model, we
also study mixed state entanglement in tight-binding models of bosons with
$U(1)$ and time-reversal symmetry. By employing Glauber-Sudarshan
`P-representation', we find a surprising result that such states have zero
entanglement.
|
[{'version': 'v1', 'created': 'Tue, 2 Jul 2019 18:02:25 GMT'}]
|
2020-12-11
|
[array(['Lu', 'Tsung-Cheng', ''], dtype=object)
array(['Grover', 'Tarun', ''], dtype=object)]
|
2,806 |
2303.03919
|
Marc Marone
|
Marc Marone, Benjamin Van Durme
|
Data Portraits: Recording Foundation Model Training Data
| null | null | null | null |
cs.LG cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Foundation models are trained on increasingly immense and opaque datasets.
Even while these models are now key in AI system building, it can be difficult
to answer the straightforward question: has the model already encountered a
given example during training? We therefore propose a widespread adoption of
Data Portraits: artifacts that record training data and allow for downstream
inspection. First we outline the properties of such an artifact and discuss how
existing solutions can be used to increase transparency. We then propose and
implement a solution based on data sketching, stressing fast and space
efficient querying. Using our tool, we document a popular large language
modeling corpus (the Pile) and show that our solution enables answering
questions about test set leakage and model plagiarism. Our tool is lightweight
and fast, costing only 3% of the dataset size in overhead. We release a demo of
our tools at dataportraits.org and call on dataset and model creators to
release Data Portraits as a complement to current documentation practices.
|
[{'version': 'v1', 'created': 'Mon, 6 Mar 2023 04:22:33 GMT'}]
|
2023-03-08
|
[array(['Marone', 'Marc', ''], dtype=object)
array(['Van Durme', 'Benjamin', ''], dtype=object)]
|
2,807 |
0809.1584
|
Dmitry E. Tamarkin
|
Dmitry Tamarkin
|
Microlocal condition for non-displaceablility
| null | null | null | null |
math.SG math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We formulate a sufficient condition for non-displaceability (by Hamiltonian
symplectomorphisms which are identity outside of a compact) of a pair of
subsets in a cotangent bundle. This condition is based on micro-local analysis
of sheaves on manifolds by Kashiwara-Schapira. This condition is used to prove
that the real projective space and the Clifford torus inside the complex
projective space are mutually non-displaceable
|
[{'version': 'v1', 'created': 'Tue, 9 Sep 2008 15:26:11 GMT'}]
|
2008-09-10
|
[array(['Tamarkin', 'Dmitry', ''], dtype=object)]
|
2,808 |
1112.0691
|
Jos\'e A. Caballero
|
Jose A. Caballero
|
Cool dwarfs in wide multiple systems: Paper I: Two mid-M dwarfs in a
loosely-bound common-proper-motion pair
|
The Observatory, Vol. 132, No. 1226, pages 1-7 [v2: corrected
position angle in Tables III and IV]
| null | null | null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is the first of a series of works devoted to investigate cool dwarfs in
wide multiple systems. Here, I present Koenigstuhl 4 A and B, two bright,
intermediate M dwarfs with a common high proper-motion and separated by 299
arcsec. At the most probable distance of the system, 19 pc, the projected
physical separation is 5700 AU, which makes Koenigstuhl 4 AB to be one of the
least bound binary systems with late-type components found to date. I also
associate the primary with a ROSAT X-ray source for the first time.
|
[{'version': 'v1', 'created': 'Sat, 3 Dec 2011 21:12:44 GMT'}
{'version': 'v2', 'created': 'Mon, 19 Mar 2012 21:38:40 GMT'}]
|
2012-03-21
|
[array(['Caballero', 'Jose A.', ''], dtype=object)]
|
2,809 |
1407.5466
|
Ladislav Kristoufek
|
Ladislav Kristoufek and Petra Lunackova
|
Rockets and feathers meet Joseph: Reinvestigating the oil-gasoline
asymmetry on the international markets
|
20 pages, 2 figures, 4 tables
|
Energy Economics, Volume 49, May 2015, Pages 1-8
|
10.1016/j.eneco.2015.01.013
| null |
q-fin.ST
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
We reinvestigate the "rockets and feathers" effect between retail gasoline
and crude oil prices in a new framework of fractional integration, long-term
memory and borderline (non-)stationarity. The most frequently used
error-correction model is examined in detail and we find that the prices return
to their equilibrium value much more slowly than would be typical for the
error-correction model. Such dynamics is usually referred to as "the Joseph
effect". The standard procedure is shown to be troublesome and we introduce
three new tests to investigate possible asymmetry in the price adjustment to
equilibrium under these complicated time series characteristics. On the dataset
of seven national gasoline prices, we report that apart from Belgium, there is
no asymmetry found. The proposed methodology is not limited to the gasoline and
crude oil case but it can be utilized for any asymmetric adjustment to
equilibrium analysis.
|
[{'version': 'v1', 'created': 'Mon, 21 Jul 2014 11:54:14 GMT'}]
|
2018-10-30
|
[array(['Kristoufek', 'Ladislav', ''], dtype=object)
array(['Lunackova', 'Petra', ''], dtype=object)]
|
2,810 |
2201.10376
|
Shijia Guo
|
Shijia Guo, Kenny Q. Zhu
|
Modeling Multi-level Context for Informational Bias Detection by
Contrastive Learning and Sentential Graph Network
|
10 pages including bibliography
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Informational bias is widely present in news articles. It refers to providing
one-sided, selective or suggestive information of specific aspects of certain
entity to guide a specific interpretation, thereby biasing the reader's
opinion. Sentence-level informational bias detection is a very challenging task
in a way that such bias can only be revealed together with the context,
examples include collecting information from various sources or analyzing the
entire article in combination with the background. In this paper, we integrate
three levels of context to detect the sentence-level informational bias in
English news articles: adjacent sentences, whole article, and articles from
other news outlets describing the same event. Our model, MultiCTX (Multi-level
ConTeXt), uses contrastive learning and sentence graphs together with Graph
Attention Network (GAT) to encode these three degrees of context at different
stages by tactically composing contrastive triplets and constructing sentence
graphs within events. Our experiments proved that contrastive learning together
with sentence graphs effectively incorporates context in varying degrees and
significantly outperforms the current SOTA model sentence-wise in informational
bias detection.
|
[{'version': 'v1', 'created': 'Tue, 25 Jan 2022 15:07:09 GMT'}]
|
2022-01-26
|
[array(['Guo', 'Shijia', ''], dtype=object)
array(['Zhu', 'Kenny Q.', ''], dtype=object)]
|
2,811 |
cond-mat/9801060
|
M. L. Rosinberg
|
E. Kierlik, M. L. Rosinberg and G.Tarjus (Universite Paris VI)
|
A self-consistent Ornstein-Zernike approximation for the Random Field
Ising model
|
29 pages, Revtex file, 2 figures included, submitted to `Phys. Rev.
B'
| null |
10.1023/A:1004526931714
|
LPTL-98-D-1
|
cond-mat.dis-nn cond-mat.stat-mech
| null |
We extend the self-consistent Ornstein-Zernike approximation (SCOZA), first
formulated in the context of liquid-state theory, to the study of the random
field Ising model. Within the replica formalism, we treat the quenched random
field as an annealed spin variable, thereby avoiding the usual average over the
random field distribution. This allows to study the influence of the
distribution on the phase diagram in finite dimensions. The thermodynamics and
the correlation functions are obtained as solutions of a set a coupled partial
differential equations with magnetization, temperature and disorder strength as
independent variables. A preliminary analysis based on high-temperature and 1/d
series expansions shows that the theory can predict accurately the dependence
of the critical temperature on disorder strength for dimensions d>4. For the
bimodal distribution, we find a tricritical point which moves to weaker fields
as the dimension is reduced. For the Gaussian distribution, a tricritical point
may appear for d slightly above 4.
|
[{'version': 'v1', 'created': 'Thu, 8 Jan 1998 11:55:22 GMT'}]
|
2015-06-25
|
[array(['Kierlik', 'E.', '', 'Universite Paris VI'], dtype=object)
array(['Rosinberg', 'M. L.', '', 'Universite Paris VI'], dtype=object)
array(['Tarjus', 'G.', '', 'Universite Paris VI'], dtype=object)]
|
2,812 |
0710.2116
|
Beno\^it Darqui\'e
|
M. Trupke, J. Goldwin, B. Darqui\'e, G. Dutier, S. Eriksson, J.
Ashmore, E. A. Hinds
|
Atom detection and photon production in a scalable, open, optical
microcavity
|
4 pages, 4 figures. A typographical error in the published paper has
been corrected (equation of the corrected normalized variance, page 3, 2nd
paragraph)
|
Phys. Rev. Lett. 99, 063601 (2007)
|
10.1103/PhysRevLett.99.063601
| null |
quant-ph
| null |
A microfabricated Fabry-Perot optical resonator has been used for atom
detection and photon production with less than 1 atom on average in the cavity
mode. Our cavity design combines the intrinsic scalability of microfabrication
processes with direct coupling of the cavity field to single-mode optical
waveguides or fibers. The presence of the atom is seen through changes in both
the intensity and the noise characteristics of probe light reflected from the
cavity input mirror. An excitation laser passing transversely through the
cavity triggers photon emission into the cavity mode and hence into the
single-mode fiber. These are first steps towards building an optical
microcavity network on an atom chip for applications in quantum information
processing.
|
[{'version': 'v1', 'created': 'Wed, 10 Oct 2007 21:07:30 GMT'}]
|
2009-11-13
|
[array(['Trupke', 'M.', ''], dtype=object)
array(['Goldwin', 'J.', ''], dtype=object)
array(['Darquié', 'B.', ''], dtype=object)
array(['Dutier', 'G.', ''], dtype=object)
array(['Eriksson', 'S.', ''], dtype=object)
array(['Ashmore', 'J.', ''], dtype=object)
array(['Hinds', 'E. A.', ''], dtype=object)]
|
2,813 |
1710.00712
|
Valentin Irkhin
|
M. A. Timirgazin, P. A. Igoshev, A. K. Arzhnikov, V. Yu. Irkhin
|
Magnetic phase transitions and unusual antiferromagnetic states in the
Hubbard model
|
Invited Report on the Moscow International Symposium on Magnetism
MISM-2017, 7 pages, J. Magn. Magn. Mater., in press
|
J. Magn. Magn. Mater. 459, 311-316 (2018)
|
10.1016/j.jmmm.2017.10.007
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Ground state magnetic phase diagrams of the square and simple cubic lattices
are investigated for the narrow band Hubbard model within the slave-boson
approach by Kotliar and Ruckenstein. The transitions between saturated
(half-metallic) and non-saturated ferromagnetic phases as well as similar
transition in antiferromagnetic (AFM) state are considered in the
three-dimensional case. Two types of saturated antiferromagnetic state with
different concentration dependences of sublattice magnetization are found in
the two-dimensional case in the vicinity of half-filling: the state with a gap
between AFM subbands and AFM state with large electron mass. The latter state
is hidden by the phase separation in the finite-U case.
|
[{'version': 'v1', 'created': 'Mon, 2 Oct 2017 15:04:40 GMT'}]
|
2018-05-09
|
[array(['Timirgazin', 'M. A.', ''], dtype=object)
array(['Igoshev', 'P. A.', ''], dtype=object)
array(['Arzhnikov', 'A. K.', ''], dtype=object)
array(['Irkhin', 'V. Yu.', ''], dtype=object)]
|
2,814 |
2010.06609
|
Howard E. Bond
|
Howard E. Bond (1 and 2), Gail H. Schaefer (3), Ronald L. Gilliland (1
and 2), and Don A. VandenBerg (4) ((1) Dept. of Astronomy & Astrophysics,
Penn State University, (2) Space Telescope Science Institute, (3) CHARA Array
of Georgia State University, (4) University of Victoria)
|
Hubble Space Telescope Astrometry of the Metal-Poor Visual Binary $\mu$
Cassiopeiae: Dynamical Masses, Helium Content, and Age
|
Accepted by Astrophysical Journal
| null |
10.3847/1538-4357/abc172
| null |
astro-ph.SR astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
$\mu$ Cassiopeiae is a nearby, high-velocity, metal-poor ($\rm[Fe/H]=-0.81$)
visual binary. We have used high-resolution imaging with the Hubble Space
Telescope (HST), obtained over nearly two decades, to determine the period
(21.568 yr) and precise orbital elements. Combining these with published
ground- and space-based astrometry, we determined dynamical masses for both
components of $\mu$ Cas: $0.7440\pm0.0122\,M_\odot$ for the G5 V primary, and
$0.1728\pm0.0035\,M_\odot$ for its faint dM companion. We detect no significant
perturbations in the HST astrometry due to a third body in the system. The
primary aim of our program was to determine, with the aid of stellar models,
the helium content and age of the metal-deficient primary star, $\mu$ Cas A.
Although we now have a precise mass, there remain uncertainties about other
parameters, including its effective temperature. Moreover, a re-examination of
archival interferometric observations leads to a suspicion that the angular
diameter was overestimated by a few percent. In the absolute magnitude versus
color plane, $\mu$ Cas A lies slightly cooler and more luminous than the main
sequence of the globular cluster 47 Tucanae; this may imply that the star has a
lower helium content, and/or is older, and/or has a higher metallicity, than
the cluster. Our best estimates for the helium content and age of $\mu$ Cas A
are $Y=0.255\pm0.014$ and $12.7\pm2.7$ Gyr--making $\mu$ Cas possibly the
oldest star in the sky visible to the naked eye. Improved measurements of the
absolute parallax of the system, the effective temperature of $\mu$ Cas A, and
its angular diameter would provide tighter constraints.
|
[{'version': 'v1', 'created': 'Tue, 13 Oct 2020 18:04:25 GMT'}]
|
2020-12-02
|
[array(['Bond', 'Howard E.', '', '1 and 2'], dtype=object)
array(['Schaefer', 'Gail H.', '', '1\n and 2'], dtype=object)
array(['Gilliland', 'Ronald L.', '', '1\n and 2'], dtype=object)
array(['VandenBerg', 'Don A.', ''], dtype=object)]
|
2,815 |
1011.3149
|
Jean Michel Maillet
|
K.K. Kozlowski, J.M. Maillet, N.A. Slavnov
|
Long-distance behavior of temperature correlation functions in the
one-dimensional Bose gas
|
40 pages, 4 figures
|
J.Stat.Mech.1103:P03018,2011
|
10.1088/1742-5468/2011/03/P03018
| null |
math-ph cond-mat.stat-mech hep-th math.MP nlin.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We describe a Bethe ansatz based method to derive, starting from a multiple
integral representation, the long-distance asymptotic behavior at finite
temperature of the density-density correlation function in the interacting
one-dimensional Bose gas. We compute the correlation lengths in terms of
solutions of non-linear integral equations of the thermodynamic Bethe ansatz
type. Finally, we establish a connection between the results obtained in our
approach with the correlation lengths stemming from the quantum transfer matrix
method.
|
[{'version': 'v1', 'created': 'Sat, 13 Nov 2010 17:36:24 GMT'}]
|
2011-06-02
|
[array(['Kozlowski', 'K. K.', ''], dtype=object)
array(['Maillet', 'J. M.', ''], dtype=object)
array(['Slavnov', 'N. A.', ''], dtype=object)]
|
2,816 |
0711.4844
|
Brian Wilhite
|
B. C. Wilhite, R. J. Brunner, C. J. Grier, D. P. Schneider and D. E.
Vanden Berk
|
On the variability of quasars: a link between Eddington ratio and
optical variability?
|
13 pages, 5 figures, Accepted for publication in MNRAS
|
Mon.Not.Roy.Astron.Soc.383:1232-1240,2008
|
10.1111/j.1365-2966.2007.12655.x
| null |
astro-ph
| null |
Repeat scans by the Sloan Digital Sky Survey (SDSS) of a 278 square degree
stripe along the Celestial equator have yielded an average of over 10
observations each for nearly 8,000 spectroscopically confirmed quasars. Over
2500 of these quasars are in the redshift range such that the CIV emission line
is visible in the SDSS spectrum. Utilising the width of these CIV lines and the
luminosity of the nearby continuum, we estimate black hole masses for these
objects. In an effort to isolate the effects of black hole mass and luminosity
on the photometric variability of our dataset, we create several subsamples by
binning in these two physical parameters. By comparing the ensemble structure
functions of the quasars in these bins, we are able to reproduce the well-known
anticorrelation between luminosity and variability, now showing that this
anticorrelation is independent of the black hole mass. In addition, we find a
correlation between variability and the mass of the central black hole. By
combining these two relations, we identify the Eddington ratio as a possible
driver of quasar variability, most likely due to differences in accretion
efficiency.
|
[{'version': 'v1', 'created': 'Thu, 29 Nov 2007 22:30:44 GMT'}]
|
2009-06-23
|
[array(['Wilhite', 'B. C.', ''], dtype=object)
array(['Brunner', 'R. J.', ''], dtype=object)
array(['Grier', 'C. J.', ''], dtype=object)
array(['Schneider', 'D. P.', ''], dtype=object)
array(['Berk', 'D. E. Vanden', ''], dtype=object)]
|
2,817 |
1906.12208
|
Junmo Song
|
Junmo Song
|
Robust test for dispersion parameter change in discretely observed
diffusion processes
|
25 pages, 5 figures
| null | null | null |
math.ST stat.ME stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper deals with the problem of testing for dispersion parameter change
in discretely observed diffusion processes when the observations are
contaminated by outliers. To lessen the impact of outliers, we first calculate
residuals using a robust estimate and then propose a trimmed-residual based
CUSUM test. The proposed test is shown to converge weakly to a function of the
Brownian bridge under the null hypothesis of no parameter change. We conduct
simulations to evaluate performances of the proposed test in the presence of
outliers. Numerical results confirm that the proposed test posses a strong
robust property against outliers. In real data analysis, we fit the
Ornstein-Uhlenbeck process to KOSPI200 volatility index data and locate some
change points that are not detected by a naive CUSUM test.
|
[{'version': 'v1', 'created': 'Fri, 28 Jun 2019 13:28:07 GMT'}]
|
2019-07-01
|
[array(['Song', 'Junmo', ''], dtype=object)]
|
2,818 |
2003.05960
|
David Loeffler
|
David Loeffler and Sarah Livia Zerbes
|
On the Bloch-Kato conjecture for GSp(4)
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove an explicit reciprocity law for the Euler system attached to the
spin motive of a genus 2 Siegel modular form. As consequences, we obtain one
inclusion of the Iwasawa Main Conjecture for such motives, and the Bloch--Kato
conjecture in analytic rank 0 for their critical twists.
|
[{'version': 'v1', 'created': 'Thu, 12 Mar 2020 18:14:00 GMT'}]
|
2020-03-16
|
[array(['Loeffler', 'David', ''], dtype=object)
array(['Zerbes', 'Sarah Livia', ''], dtype=object)]
|
2,819 |
1001.0426
|
Jing-ning Zhang
|
J.-N. Zhang and S. Yi
|
Thermodynamic properties of a dipolar Fermi gas
| null |
Phys. Rev. A 81, 033617 (2010)
|
10.1103/PhysRevA.81.033617
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Based on the semi-classical theory, we investigate the thermodynamic
properties of a dipolar Fermi gas. Through a self-consistent procedure, we
numerically obtain the phase space distribution function at finite temperature.
We show that the deformations in both momentum and real space becomes smaller
and smaller as one increases the temperature. For homogeneous case, we also
calculate pressure, entropy, and heat capacity. In particular, at low
temperature limit and in weak interaction regime, we obtain an analytic
expression for the entropy, which agrees qualitatively with our numerical
result. The stability of a trapped gas at finite temperature is also explored.
|
[{'version': 'v1', 'created': 'Mon, 4 Jan 2010 02:00:46 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Mar 2010 01:32:35 GMT'}]
|
2010-04-20
|
[array(['Zhang', 'J. -N.', ''], dtype=object)
array(['Yi', 'S.', ''], dtype=object)]
|
2,820 |
physics/0607281
|
Michael Scalora
|
Antonella D'Orazio, Domenico de Ceglia, Marco De Sario, Francesco
Prudenzano, Mark J. Bloemer, Michael Scalora
|
Analysis of second harmonic generation in photonic-crystal-assisted
waveguides
|
20 pages, 7 figures, 330kb
| null |
10.1063/1.2266104
| null |
physics.optics
| null |
We study second harmonic generation in a planar dielectric waveguide having a
low-index, polymer core layer, bounded by two multilayer stacks. This geometry
allows exceptionally strong confinement of the light at the fundamental
wavelength inside the core region with virtually zero net propagation losses
for distances that exceed several centimeters, provided material and scattering
losses are neglected. A phase-matched configuration of the waveguide is
reported in which the pump signal is the lowest-order mode of the waveguide,
and the generated second harmonic signal corresponds to the third propagation
mode of the waveguide. Using a polymer waveguide core, having chi(2)=100 pm/V,
we predict a conversion efficiency of approximately 90% after a propagation
distance of 2 mm, using peak pump intensities inside the core of the waveguide
of 1.35 GW/cm^2. If the waveguide core contains polymer layers with different
glass transition temperatures, the layers can be poled independently to
maximize the overlap integral, and similar pump depletions may be achieved over
a distance of approximately 500 microns.
|
[{'version': 'v1', 'created': 'Sun, 30 Jul 2006 06:24:33 GMT'}]
|
2009-11-13
|
[array(["D'Orazio", 'Antonella', ''], dtype=object)
array(['de Ceglia', 'Domenico', ''], dtype=object)
array(['De Sario', 'Marco', ''], dtype=object)
array(['Prudenzano', 'Francesco', ''], dtype=object)
array(['Bloemer', 'Mark J.', ''], dtype=object)
array(['Scalora', 'Michael', ''], dtype=object)]
|
2,821 |
2208.04051
|
Valerio Faraoni
|
Valerio Faraoni, Serena Giardino, Andrea Giusti, and Robert Vanderwee
|
Scalar field as a perfect fluid: thermodynamics of minimally coupled
scalars and Einstein frame scalar-tensor gravity
|
19 pages, latex
| null |
10.1140/epjc/s10052-023-11186-7
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit the analogy between a minimally coupled scalar field in general
relativity and a perfect fluid, correcting previous identifications of
effective temperature and chemical potential. This provides a useful
complementary picture for the first-order thermodynamics of scalar-tensor
gravity, paving the way for the Einstein frame formulation (which eluded
previous attempts) and raises interesting questions to further develop the
analogy.
|
[{'version': 'v1', 'created': 'Mon, 8 Aug 2022 10:49:03 GMT'}]
|
2023-02-01
|
[array(['Faraoni', 'Valerio', ''], dtype=object)
array(['Giardino', 'Serena', ''], dtype=object)
array(['Giusti', 'Andrea', ''], dtype=object)
array(['Vanderwee', 'Robert', ''], dtype=object)]
|
2,822 |
quant-ph/9505004
|
Reidun Twarock
|
C. Schulte, R. Twarock, A. Bohm
|
The Rigged Hilbert Space Formulation of Quantum Mechanics and its
Implications for Irreversibility
|
18 pages, latex
| null | null |
ASI-TPA/6/95
|
quant-ph
| null |
Quantum mechanics in the Rigged Hilbert Space formulation describes
quasistationary phenomena mathematically rigorously in terms of Gamow vectors.
We show that these vectors exhibit microphysical irreversibility, related to an
intrinsic quantum mechanical arrow of time, which states that preparation of a
state has to precede the registration of an observable in this state. Moreover,
the Rigged Hilbert Space formalism allows the derivation of an exact golden
rule describing the transition of a pure Gamow state into a mixture of
interaction-free decay products.
|
[{'version': 'v1', 'created': 'Fri, 12 May 1995 10:49:48 GMT'}]
|
2007-05-23
|
[array(['Schulte', 'C.', ''], dtype=object)
array(['Twarock', 'R.', ''], dtype=object)
array(['Bohm', 'A.', ''], dtype=object)]
|
2,823 |
2002.01771
|
Se-In Jang
|
Se-In Jang
|
Online Passive-Aggressive Total-Error-Rate Minimization
| null | null | null | null |
stat.ML cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We provide a new online learning algorithm which utilizes online
passive-aggressive learning (PA) and total-error-rate minimization (TER) for
binary classification. The PA learning establishes not only large margin
training but also the capacity to handle non-separable data. The TER learning
on the other hand minimizes an approximated classification error based
objective function. We propose an online PATER algorithm which combines those
useful properties. In addition, we also present a weighted PATER algorithm to
improve the ability to cope with data imbalance problems. Experimental results
demonstrate that the proposed PATER algorithms achieves better performances in
terms of efficiency and effectiveness than the existing state-of-the-art online
learning algorithms in real-world data sets.
|
[{'version': 'v1', 'created': 'Wed, 5 Feb 2020 13:10:01 GMT'}]
|
2020-02-06
|
[array(['Jang', 'Se-In', ''], dtype=object)]
|
2,824 |
hep-th/9704026
|
Mikhail Volkov
|
Mikhail S. Volkov and Norbert Straumann
|
Slowly Rotating Non-Abelian Black Holes
|
8 pages, LaTeX
|
Phys.Rev.Lett.79:1428-1431,1997
|
10.1103/PhysRevLett.79.1428
|
ZU-TH 8/97
|
hep-th gr-qc
| null |
It is shown that the well-known non-Abelian static SU(2) black hole solutions
have rotating generalizations, provided that the hypothesis of linearization
stability is accepted. Surprisingly, this rotating branch has an asymptotically
Abelian gauge field with an electric charge that cannot vanish, although the
non-rotating limit is uncharged. We argue that this may be related to our
second finding, namely that there are no globally regular slowly rotating
excitations of the particle-like Bartnik-McKinnon solutions.
|
[{'version': 'v1', 'created': 'Thu, 3 Apr 1997 16:34:03 GMT'}]
|
2010-11-19
|
[array(['Volkov', 'Mikhail S.', ''], dtype=object)
array(['Straumann', 'Norbert', ''], dtype=object)]
|
2,825 |
1705.06623
|
Warut Suksompong
|
Tomer Ezra, Michal Feldman, Tim Roughgarden, and Warut Suksompong
|
Pricing Multi-Unit Markets
| null |
ACM Transactions on Economics and Computation, 7(4):20 (2020)
|
10.1145/3373715
| null |
cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the power and limitations of posted prices in multi-unit markets,
where agents arrive sequentially in an arbitrary order. We prove upper and
lower bounds on the largest fraction of the optimal social welfare that can be
guaranteed with posted prices, under a range of assumptions about the
designer's information and agents' valuations. Our results provide insights
about the relative power of uniform and non-uniform prices, the relative
difficulty of different valuation classes, and the implications of different
informational assumptions. Among other results, we prove constant-factor
guarantees for agents with (symmetric) subadditive valuations, even in an
incomplete-information setting and with uniform prices.
|
[{'version': 'v1', 'created': 'Thu, 18 May 2017 14:43:48 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Mar 2018 16:14:16 GMT'}]
|
2020-02-18
|
[array(['Ezra', 'Tomer', ''], dtype=object)
array(['Feldman', 'Michal', ''], dtype=object)
array(['Roughgarden', 'Tim', ''], dtype=object)
array(['Suksompong', 'Warut', ''], dtype=object)]
|
2,826 |
2303.02355
|
Megan Schwamb
|
Megan E. Schwamb, R. Lynne Jones, Peter Yoachim, Kathryn Volk,
Rosemary C. Dorsey, Cyrielle Opitom, Sarah Greenstreet, Tim Lister, Colin
Snodgrass, Bryce T. Bolin, Laura Inno, Michele T. Bannister, Siegfried Eggl,
Michael Solontoi, Michael S. P. Kelley, Mario Juri\'c, Hsing Wen Lin, Darin
Ragozzine, Pedro H. Bernardinelli, Steven R. Chesley, Tansu Daylan, Josef
\v{D}urech, Wesley C. Fraser, Mikael Granvik, Matthew M. Knight, Carey M.
Lisse, Renu Malhotra, William J. Oldroyd, Audrey Thirouin, Quanzhi Ye
|
Tuning the Legacy Survey of Space and Time (LSST) Observing Strategy for
Solar System Science
|
Accepted to ApJS, 103 pages (including references), 43 figures, 9
Tables. Videos will be available in the online journal formatted and
published version of the paper [v2.0 submission corrects the author list
metadata from the arxiv initial submission and updates the abstract]
| null |
10.3847/1538-4365/acc173
| null |
astro-ph.EP astro-ph.IM
|
http://creativecommons.org/licenses/by/4.0/
|
The Vera C. Rubin Observatory is expected to start the Legacy Survey of Space
and Time (LSST) in early to mid-2025. This multi-band wide-field synoptic
survey will transform our view of the solar system, with the discovery and
monitoring of over 5 million small bodies.The final survey strategy chosen for
LSST has direct implications on the discoverability and characterization of
solar system minor planets and passing interstellar objects. Creating an
inventory of the solar system is one of the four main LSST science drivers. The
LSST observing cadence is a complex optimization problem that must balance the
priorities and needs of all the key LSST science areas. To design the best LSST
survey strategy, a series of operation simulations using the Rubin Observatory
scheduler have been generated to explore the various options for tuning
observing parameters and prioritizations. We explore the impact of the various
simulated LSST observing strategies on studying the solar system's small body
reservoirs. We examine what are the best observing scenarios and review what
are the important considerations for maximizing LSST solar system science. In
general, most of the LSST cadence simulations produce +/-5% or less variations
in our chosen key metrics, but a subset of the simulations significantly hinder
science returns with much larger losses in the discovery and light curve
metrics.
|
[{'version': 'v1', 'created': 'Sat, 4 Mar 2023 08:40:44 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Mar 2023 04:42:07 GMT'}]
|
2023-05-31
|
[array(['Schwamb', 'Megan E.', ''], dtype=object)
array(['Jones', 'R. Lynne', ''], dtype=object)
array(['Yoachim', 'Peter', ''], dtype=object)
array(['Volk', 'Kathryn', ''], dtype=object)
array(['Dorsey', 'Rosemary C.', ''], dtype=object)
array(['Opitom', 'Cyrielle', ''], dtype=object)
array(['Greenstreet', 'Sarah', ''], dtype=object)
array(['Lister', 'Tim', ''], dtype=object)
array(['Snodgrass', 'Colin', ''], dtype=object)
array(['Bolin', 'Bryce T.', ''], dtype=object)
array(['Inno', 'Laura', ''], dtype=object)
array(['Bannister', 'Michele T.', ''], dtype=object)
array(['Eggl', 'Siegfried', ''], dtype=object)
array(['Solontoi', 'Michael', ''], dtype=object)
array(['Kelley', 'Michael S. P.', ''], dtype=object)
array(['Jurić', 'Mario', ''], dtype=object)
array(['Lin', 'Hsing Wen', ''], dtype=object)
array(['Ragozzine', 'Darin', ''], dtype=object)
array(['Bernardinelli', 'Pedro H.', ''], dtype=object)
array(['Chesley', 'Steven R.', ''], dtype=object)
array(['Daylan', 'Tansu', ''], dtype=object)
array(['Ďurech', 'Josef', ''], dtype=object)
array(['Fraser', 'Wesley C.', ''], dtype=object)
array(['Granvik', 'Mikael', ''], dtype=object)
array(['Knight', 'Matthew M.', ''], dtype=object)
array(['Lisse', 'Carey M.', ''], dtype=object)
array(['Malhotra', 'Renu', ''], dtype=object)
array(['Oldroyd', 'William J.', ''], dtype=object)
array(['Thirouin', 'Audrey', ''], dtype=object)
array(['Ye', 'Quanzhi', ''], dtype=object)]
|
2,827 |
1606.08746
|
Hui Zhai
|
Yuzhu Jiang, Ran Qi, Zhe-Yu Shi and Hui Zhai
|
Vortex Lattices in the Bose-Fermi Superfluid Mixture
|
5 pages, 3 figures
|
Phys. Rev. Lett. 118, 080403 (2017)
|
10.1103/PhysRevLett.118.080403
| null |
cond-mat.quant-gas cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this letter we show that the vortex lattice structure in the Bose-Fermi
superfluid mixture can undergo a sequence of structure transitions when the
Fermi superfluid is tuned from the BCS regime to the BEC regime. This is due to
different vortex core structure of the Fermi superfluid in the BCS regime and
in the BEC regime. In the former the vortex core is nearly filled, while the
density at the vortex core gradually decreases until it empties out at the BEC
regime. Therefore, with the density-density interaction between the Bose and
the Fermi superfluids, the two sets of vortex lattices interact stronger in the
BEC regime that yields the structure transition of vortex lattices. In view of
recent realization of this superfluid mixture and vortices therein, our
theoretical predication can be verified experimentally in near future.
|
[{'version': 'v1', 'created': 'Tue, 28 Jun 2016 14:57:20 GMT'}]
|
2017-03-01
|
[array(['Jiang', 'Yuzhu', ''], dtype=object)
array(['Qi', 'Ran', ''], dtype=object)
array(['Shi', 'Zhe-Yu', ''], dtype=object)
array(['Zhai', 'Hui', ''], dtype=object)]
|
2,828 |
2304.13453
|
Michael Groom Dr
|
Michael Groom and Ben Thornber
|
Reynolds number dependence of turbulence induced by the
Richtmyer-Meshkov instability using direct numerical simulations
| null |
Journal of Fluid Mechanics, Volume 908, 10 February 2021, A31
|
10.1017/jfm.2020.913
| null |
physics.flu-dyn
|
http://creativecommons.org/licenses/by/4.0/
|
This paper investigates the Reynolds number dependence of a turbulent mixing
layer evolving from the Richtmyer-Meshkov instability using a series of direct
numerical simulations of a well-defined narrowband initial condition for a
range of different Reynolds numbers. The growth rate exponent of the integral
width and mixed mass is shown to marginally depend on the initial Reynolds
number Re0, as does the minimum value of the molecular mixing fraction. The
decay rates of turbulent kinetic energy and its dissipation rate are shown to
decrease with increasing Re0, while the spatial distribution of these
quantities is biased towards the spike side of the layer. The normalised
dissipation rate and scalar dissipation rate are calculated and are observed to
be approaching a high Reynolds number limit. By fitting an appropriate
functional form, the asymptotic value of these two quantities is estimated as
1.54 and 0.66. Finally, an evaluation of the mixing transition criterion for
unsteady flows is performed, showing that even for the highest Re0 case the
turbulence in the flow is not yet fully developed. This is despite the
observation of a narrow inertial range in the turbulent kinetic energy spectra,
with a scaling close to -3/2.
|
[{'version': 'v1', 'created': 'Wed, 26 Apr 2023 11:21:32 GMT'}]
|
2023-04-27
|
[array(['Groom', 'Michael', ''], dtype=object)
array(['Thornber', 'Ben', ''], dtype=object)]
|
2,829 |
1307.0571
|
Marius Nicolae
|
Marius Nicolae and Sanguthevar Rajasekaran
|
Efficient Sequential and Parallel Algorithms for Planted Motif Search
| null | null | null | null |
cs.DS cs.CE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motif searching is an important step in the detection of rare events
occurring in a set of DNA or protein sequences. One formulation of the problem
is known as (l,d)-motif search or Planted Motif Search (PMS). In PMS we are
given two integers l and d and n biological sequences. We want to find all
sequences of length l that appear in each of the input sequences with at most d
mismatches. The PMS problem is NP-complete. PMS algorithms are typically
evaluated on certain instances considered challenging. This paper presents an
exact parallel PMS algorithm called PMS8. PMS8 is the first algorithm to solve
the challenging (l,d) instances (25,10) and (26,11). PMS8 is also efficient on
instances with larger l and d such as (50,21). This paper also introduces
necessary and sufficient conditions for 3 l-mers to have a common d-neighbor.
|
[{'version': 'v1', 'created': 'Tue, 2 Jul 2013 01:51:06 GMT'}]
|
2013-07-03
|
[array(['Nicolae', 'Marius', ''], dtype=object)
array(['Rajasekaran', 'Sanguthevar', ''], dtype=object)]
|
2,830 |
0709.1983
|
Yang Siman
|
Siman Yang
|
Improvement on Parameters of Algebraic-Geometry Codes from Hermitian
Curves
|
5 pages
| null | null | null |
math.AG
| null |
Motivated by Xing's method [7], we show that there exist [n,k,d] linear
Hermitian codes over F_{q^2} with k+d>=n-3 for all sufficiently large q. This
improves the asymptotic bound of Algebraic-Geometry codes from Hermitian curves
given in [9,10].
|
[{'version': 'v1', 'created': 'Thu, 13 Sep 2007 04:07:13 GMT'}]
|
2007-09-14
|
[array(['Yang', 'Siman', ''], dtype=object)]
|
2,831 |
2010.00031
|
Hongtaek Jung
|
Hongtaek Jung, Sungkyung Kang, Seungwon Kim
|
Concordance invariants and the Turaev genus
|
6 pages, 3 figures. Some references are added or corrected. More
descriptions on oriented band surgeries and slice-torus invariants are added
| null | null | null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that the differences between various concordance invariants of knots,
including Rasmussen's $s$-invariant and its generalizations $s_n$-invariants,
give lower bounds to the Turaev genus of knots. Using the fact that our bounds
are nontrivial for some quasi-alternating knots, we show the additivity of
Turaev genus for a certain class of knots. This leads us to the first example
of an infinite family of quasi-alternating knots with Turaev genus exactly $g$
for any fixed positive integer $g$, solving a question of Champanerkar-Kofman.
|
[{'version': 'v1', 'created': 'Wed, 30 Sep 2020 18:04:45 GMT'}
{'version': 'v2', 'created': 'Fri, 19 Feb 2021 15:48:27 GMT'}]
|
2021-02-22
|
[array(['Jung', 'Hongtaek', ''], dtype=object)
array(['Kang', 'Sungkyung', ''], dtype=object)
array(['Kim', 'Seungwon', ''], dtype=object)]
|
2,832 |
1803.06639
|
Samuel Quaegebeur
|
Samuel Quaegebeur, Siva Nadarajah, Farshad Navah and Philip Zwanenburg
|
Stability of Energy Stable Flux Reconstruction for the Diffusion Problem
using the Interior Penalty and Bassi and Rebay II Numerical Fluxes
| null |
SIAM Journal on Scientific Computing, 2019, Vol. 41, No. 1 : pp.
A643-A667
|
10.1137/18M1184916
| null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recovering some prominent high-order approaches such as the discontinuous
Galerkin (DG) or the spectral difference (SD) methods, the flux reconstruction
(FR) approach has been adopted by many individuals in the research community
and is now commonly used to solve problems on unstructured grids over complex
geometries. This approach relies on the use of correction functions to obtain a
differential form for the discrete problem. A class of correction functions,
named energy stable flux reconstruction (ESFR) functions, has been proven
stable for the linear advection problem. This proof has then been extended for
the diffusion equation using the local discontinuous Galerkin (LDG) scheme to
compute the numerical fluxes. Although the LDG scheme is commonly used, many
prefer the interior penalty (IP), as well as the Bassi and Rebay II (BR2)
schemes. Similarly to the LDG proof, this article provides a stability analysis
for the IP and the BR2 numerical fluxes. In fact, we obtain a theoretical
condition on the penalty term to ensure stability. This result is then verified
through numerical simulations. To complete this study, a von Neumann analysis
is conducted to provide a combination of parameters producing the maximal time
step while converging at the correct order. All things considered, this article
has for purpose to provide the community with a stability condition while using
the IP and the BR2 schemes.
|
[{'version': 'v1', 'created': 'Sun, 18 Mar 2018 10:51:54 GMT'}]
|
2019-03-18
|
[array(['Quaegebeur', 'Samuel', ''], dtype=object)
array(['Nadarajah', 'Siva', ''], dtype=object)
array(['Navah', 'Farshad', ''], dtype=object)
array(['Zwanenburg', 'Philip', ''], dtype=object)]
|
2,833 |
1906.08012
|
Stefano Mossa
|
H. Mizuno, S. Mossa
|
Impact of elastic heterogeneity on the propagation of vibrations at
finite temperatures in glasses
|
14 pages, 5 figures, 1 table
|
Condens. Matter Phys., 2019, vol. 22, No. 4, 43604
|
10.5488/CMP.22.43604
| null |
cond-mat.soft cond-mat.dis-nn cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Some aspects of how sound waves travel through disordered solids are still
unclear. Recent work has characterized a feature of disordered solids which
seems to influence vibrational excitations at the mesoscales, local elastic
heterogeneity. Sound waves propagation has been demonstrated to be strongly
affected by inhomogeneous mechanical features of the materials which add to the
standard anharmonic couplings, amounting to extremely complex transport
properties at finite temperatures. Here, we address these issues for the case
of a simple atomic glass former, by Molecular Dynamics computer simulation. In
particular, we focus on the transverse components of the vibrational
excitations in terms of dynamic structure factors, and characterize the
temperature dependence of sound dispersion and attenuation in an extended
frequency range. We provide a complete picture of how elastic heterogeneity
determines transport of vibrational excitations, also based on a direct
comparison of the numerical data with the predictions of the heterogeneous
elastic theory.
|
[{'version': 'v1', 'created': 'Wed, 19 Jun 2019 10:28:09 GMT'}
{'version': 'v2', 'created': 'Wed, 4 Dec 2019 13:40:27 GMT'}]
|
2019-12-05
|
[array(['Mizuno', 'H.', ''], dtype=object)
array(['Mossa', 'S.', ''], dtype=object)]
|
2,834 |
math/0212078
|
Lajos Molnar
|
Lajos Molnar and Werner Timmermann
|
Preserving the measure of compatibility between quantum states
|
11 pages, submitted for publication
| null |
10.1063/1.1545164
| null |
math.FA math.OA quant-ph
| null |
In this paper after defining the abstract concept of compatibility-like
functions on quantum states, we prove that every bijective transformation on
the set of all states which preserves such a function is implemented by an
either unitary or antiunitary operator.
|
[{'version': 'v1', 'created': 'Thu, 5 Dec 2002 08:05:55 GMT'}]
|
2009-11-07
|
[array(['Molnar', 'Lajos', ''], dtype=object)
array(['Timmermann', 'Werner', ''], dtype=object)]
|
2,835 |
1912.07969
|
Ana Laura M\"uller
|
Gustavo E. Romero and Ana Laura M\"uller
|
Gamma Rays from Large-Scale Outflows in Starburst Galaxies
|
7 pages, 3 figures, Proceeding HEPRO VII (Barcelona, 2019)
| null | null | null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The combined effects of supernova explosions and stellar winds produce a hot
bubble in the central regions of starburst galaxies. As the bubble expands, it
can outbreak into the galactic halo driving a superwind that transports hot gas
and fields to the intergalactic space. We present estimates of cosmic ray
generation and gamma-ray emission in both this large-scale wind and the bow
shocks created around the embedded clouds.
|
[{'version': 'v1', 'created': 'Tue, 17 Dec 2019 12:35:15 GMT'}]
|
2019-12-18
|
[array(['Romero', 'Gustavo E.', ''], dtype=object)
array(['Müller', 'Ana Laura', ''], dtype=object)]
|
2,836 |
1807.07372
|
Mar\'ia P\'ia Mazzoleni
|
Flavia Bonomo-Braberman, Mar\'ia P\'ia Mazzoleni, Mariano Leonardo
Rean, Bernard Ries
|
On some special classes of contact $B_0$-VPG graphs
|
34 pages, 15 figures
|
Discrete Applied Mathematics 308 (2022), 111-129
|
10.1016/j.dam.2019.10.008
| null |
math.CO cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A graph $G$ is a $B_0$-VPG graph if one can associate a path on a rectangular
grid with each vertex such that two vertices are adjacent if and only if the
corresponding paths intersect at at least one grid-point. A graph $G$ is a
contact $B_0$-VPG graph if it is a $B_0$-VPG graph admitting a representation
with no two paths crossing and no two paths sharing an edge of the grid. In
this paper, we present a minimal forbidden induced subgraph characterisation of
contact $B_0$-VPG graphs within four special graph classes: chordal graphs,
tree-cographs, $P_4$-tidy graphs and $P_5$-free graphs. Moreover, we present a
polynomial-time algorithm for recognising chordal contact $B_0$-VPG graphs.
|
[{'version': 'v1', 'created': 'Thu, 19 Jul 2018 12:50:51 GMT'}
{'version': 'v2', 'created': 'Thu, 3 Oct 2019 13:59:08 GMT'}]
|
2023-04-04
|
[array(['Bonomo-Braberman', 'Flavia', ''], dtype=object)
array(['Mazzoleni', 'María Pía', ''], dtype=object)
array(['Rean', 'Mariano Leonardo', ''], dtype=object)
array(['Ries', 'Bernard', ''], dtype=object)]
|
2,837 |
2004.07802
|
Mikhail Khodak
|
Liam Li, Mikhail Khodak, Maria-Florina Balcan, Ameet Talwalkar
|
Geometry-Aware Gradient Algorithms for Neural Architecture Search
|
ICLR 2021 Camera-Ready
| null | null | null |
cs.LG cs.CV cs.NE math.OC stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent state-of-the-art methods for neural architecture search (NAS) exploit
gradient-based optimization by relaxing the problem into continuous
optimization over architectures and shared-weights, a noisy process that
remains poorly understood. We argue for the study of single-level empirical
risk minimization to understand NAS with weight-sharing, reducing the design of
NAS methods to devising optimizers and regularizers that can quickly obtain
high-quality solutions to this problem. Invoking the theory of mirror descent,
we present a geometry-aware framework that exploits the underlying structure of
this optimization to return sparse architectural parameters, leading to simple
yet novel algorithms that enjoy fast convergence guarantees and achieve
state-of-the-art accuracy on the latest NAS benchmarks in computer vision.
Notably, we exceed the best published results for both CIFAR and ImageNet on
both the DARTS search space and NAS-Bench201; on the latter we achieve
near-oracle-optimal performance on CIFAR-10 and CIFAR-100. Together, our theory
and experiments demonstrate a principled way to co-design optimizers and
continuous relaxations of discrete NAS search spaces.
|
[{'version': 'v1', 'created': 'Thu, 16 Apr 2020 17:46:39 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Aug 2020 16:03:42 GMT'}
{'version': 'v3', 'created': 'Thu, 15 Oct 2020 22:20:48 GMT'}
{'version': 'v4', 'created': 'Tue, 29 Dec 2020 14:44:17 GMT'}
{'version': 'v5', 'created': 'Thu, 18 Mar 2021 17:47:28 GMT'}]
|
2021-03-19
|
[array(['Li', 'Liam', ''], dtype=object)
array(['Khodak', 'Mikhail', ''], dtype=object)
array(['Balcan', 'Maria-Florina', ''], dtype=object)
array(['Talwalkar', 'Ameet', ''], dtype=object)]
|
2,838 |
2204.04086
|
Filipo Sharevski
|
Filipo Sharevski, Amy Devine, Emma Pieroni, Peter Jachim
|
Gone Quishing: A Field Study of Phishing with Malicious QR Codes
| null | null | null | null |
cs.CR cs.HC
|
http://creativecommons.org/licenses/by/4.0/
|
The COVID-19 pandemic enabled "quishing", or phishing with malicious QR
codes, as they became a convenient go-between for sharing URLs, including
malicious ones. To explore the quishing phenomenon, we conducted a
173-participant study where we used a COVID-19 digital passport sign-up trial
with a malicious QR code as a pretext. We found that 67 % of the participants
were happy to sign-up with their Google or Facebook credentials, 18.5% to
create a new account, and only 14.5% to skip on the sign-up. Convenience was
the single most cited factor for the willingness to yield participants'
credentials. Reluctance of linking personal accounts with new services was the
reason for creating a new account or skipping the registration. We also
developed a Quishing Awareness Scale (QAS) and found a significant relationship
between participants' QR code behavior and their sign-up choices: the ones
choosing to sign-up with Facebook scored the lowest while the one choosing to
skip the highest on average. We used our results to propose quishing awareness
training guidelines and develop and test usable security indicators for warning
users about the threat of quishing.
|
[{'version': 'v1', 'created': 'Fri, 8 Apr 2022 14:06:31 GMT'}]
|
2022-04-11
|
[array(['Sharevski', 'Filipo', ''], dtype=object)
array(['Devine', 'Amy', ''], dtype=object)
array(['Pieroni', 'Emma', ''], dtype=object)
array(['Jachim', 'Peter', ''], dtype=object)]
|
2,839 |
2106.12428
|
Zhenning Cai
|
Zhenning Cai, Jingwei Hu, Yang Kuang, Bo Lin
|
An entropic method for discrete systems with Gibbs entropy
| null | null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider general systems of ordinary differential equations with monotonic
Gibbs entropy, and introduce an entropic scheme that simply imposes an entropy
fix after every time step of any existing time integrator. It is proved that in
the general case, our entropy fix has only infinitesimal influence on the
numerical order of the original scheme, and in many circumstances, it can be
shown that the scheme does not affect the numerical order. Numerical
experiments on the linear Fokker-Planck equation and nonlinear Boltzmann
equation are carried out to support our numerical analysis.
|
[{'version': 'v1', 'created': 'Wed, 23 Jun 2021 14:28:34 GMT'}]
|
2021-06-24
|
[array(['Cai', 'Zhenning', ''], dtype=object)
array(['Hu', 'Jingwei', ''], dtype=object)
array(['Kuang', 'Yang', ''], dtype=object)
array(['Lin', 'Bo', ''], dtype=object)]
|
2,840 |
1503.04068
|
David Kyed
|
David Kyed and Henrik Densing Petersen
|
Polynomial Cohomology and Polynomial Maps on Nilpotent Groups
|
v3: minor changes; to appear in Glasgow Mathematical Journal. v2:
significant changes compared to v1; the result on quasi-isometry
classification of csc nilpotent Lie groups removed due to a flaw in the proof
|
Glasgow Math. J. 62 (2020) 706-736
|
10.1017/S0017089519000429
| null |
math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a refined version of group cohomology and relate it to the space
of polynomials on the group in question. We show that the polynomial cohomology
with trivial coefficients admits a description in terms of ordinary cohomology
with polynomial coefficients, and that the degree one polynomial cohomology
with trivial coefficients admits a description directly in terms of
polynomials. Lastly, we give a complete description of the polynomials on a
connected, simply connected nilpotent Lie group by showing that these are
exactly the maps that pull back to classical polynomials via the exponential
map.
|
[{'version': 'v1', 'created': 'Fri, 13 Mar 2015 13:58:34 GMT'}
{'version': 'v2', 'created': 'Sun, 5 Nov 2017 22:54:46 GMT'}
{'version': 'v3', 'created': 'Mon, 9 Sep 2019 15:12:33 GMT'}]
|
2020-08-12
|
[array(['Kyed', 'David', ''], dtype=object)
array(['Petersen', 'Henrik Densing', ''], dtype=object)]
|
2,841 |
2208.04153
|
Shreya Bhatt
|
Shreya Bhatt, Aayush Jain, Parv Maheshwari, Animesh Jha, Debashish
Chakravarty
|
[Reproducibility Report] Path Planning using Neural A* Search
| null | null | null | null |
cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
The following paper is a reproducibility report for "Path Planning using
Neural A* Search" published in ICML2 2021 as part of the ML Reproducibility
Challenge 2021. The original paper proposes the Neural A* planner, and claims
it achieves an optimal balance between the reduction of node expansions and
path accuracy. We verify this claim by reimplementing the model in a different
framework and reproduce the data published in the original paper. We have also
provided a code-flow diagram to aid comprehension of the code structure. As
extensions to the original paper, we explore the effects of (1) generalizing
the model by training it on a shuffled dataset, (2) introducing dropout, (3)
implementing empirically chosen hyperparameters as trainable parameters in the
model, (4) altering the network model to Generative Adversarial Networks (GANs)
to introduce stochasticity, (5) modifying the encoder from Unet to Unet++, (6)
incorporating cost maps obtained from the Neural A* module in other variations
of A* search.
|
[{'version': 'v1', 'created': 'Sat, 16 Jul 2022 17:25:04 GMT'}]
|
2022-08-09
|
[array(['Bhatt', 'Shreya', ''], dtype=object)
array(['Jain', 'Aayush', ''], dtype=object)
array(['Maheshwari', 'Parv', ''], dtype=object)
array(['Jha', 'Animesh', ''], dtype=object)
array(['Chakravarty', 'Debashish', ''], dtype=object)]
|
2,842 |
1602.08792
|
Liu Shiyuan
|
Shiyuan Liu
|
Fermionic formula for double Kostka polynomials
| null | null | null | null |
math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The $X=M$ conjecture asserts that the $1D$ sum and the fermionic formula
coincide up to some constant power. In the case of type $A,$ both the $1D$ sum
and the fermionic formula are closely related to Kostka polynomials. Double
Kostka polynomials $K_{\Bla,\Bmu}(t),$ indexed by two double partitions
$\Bla,\Bmu,$ are polynomials in $t$ introduced as a generalization of Kostka
polynomials. In the present paper, we consider $K_{\Bla,\Bmu}(t)$ in the
special case where $\Bmu=(-,\mu'').$ We formulate a $1D$ sum and a fermionic
formula for $K_{\Bla,\Bmu}(t),$ as a generalization of the case of ordinary
Kostka polynomials. Then we prove an analogue of the $X=M$ conjecture.
|
[{'version': 'v1', 'created': 'Mon, 29 Feb 2016 01:00:55 GMT'}]
|
2016-03-01
|
[array(['Liu', 'Shiyuan', ''], dtype=object)]
|
2,843 |
1109.1761
|
Cyril Furtlehner
|
Cyril Furtlehner, Jean-Marc Lasgouttes and Maxim Samsonov
|
One-dimensional Particle Processes with Acceleration/Braking Asymmetry
|
28 pages, 8 figures
|
J. Stat. Phys. (2012) Vol. 147, No 6, pp 1113-1144
|
10.1007/s10955-012-0521-y
| null |
cond-mat.stat-mech math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The slow-to-start mechanism is known to play an important role in the
particular shape of the Fundamental diagram of traffic and to be associated to
hysteresis effects of traffic flow.We study this question in the context of
exclusion and queueing processes,by including an asymmetry between deceleration
and acceleration in the formulation of these processes. For exclusions
processes, this corresponds to a multi-class process with transition asymmetry
between different speed levels, while for queueing processes we consider
non-reversible stochastic dependency of the service rate w.r.t the number of
clients. The relationship between these 2 families of models is analyzed on the
ring geometry, along with their steady state properties. Spatial condensation
phenomena and metastability is observed, depending on the level of the
aforementioned asymmetry. In addition we provide a large deviation formulation
of the fundamental diagram (FD) which includes the level of fluctuations, in
the canonical ensemble when the stationary state is expressed as a product form
of such generalized queues.
|
[{'version': 'v1', 'created': 'Thu, 8 Sep 2011 16:33:21 GMT'}]
|
2015-05-30
|
[array(['Furtlehner', 'Cyril', ''], dtype=object)
array(['Lasgouttes', 'Jean-Marc', ''], dtype=object)
array(['Samsonov', 'Maxim', ''], dtype=object)]
|
2,844 |
2109.04864
|
Marco Bresciani
|
Marco Bresciani, Martin Kru\v{z}\'ik
|
A reduced model for plates arising as low energy $\Gamma$-limit in
nonlinear magnetoelasticity
|
50 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the problem of dimension reduction for plates in nonlinear
magnetoelasticity. The model features a mixed Eulerian-Lagrangian formulation,
as magnetizations are defined on the deformed set in the actual space. We
consider low-energy configurations by rescaling the elastic energy according to
the linearized von K\'{a}rm\'{a}n regime. First, we identify a reduced model by
computing the $\Gamma$-limit of the magnetoelastic energy, as the thickness of
the plate goes to zero. This extends a previous result obtained by the first
author in the incompressible case to the compressible one. Then, we introduce
applied loads given by mechanical forces and external magnetic fields and we
prove that, under clamped boundary conditions, sequences of almost minimizes of
the total energy converge to minimizers of the corresponding energy in the
reduced model. Subsequently, we study quasistatic evolutions driven by
time-dependent applied loads and a rate-independent dissipation. We prove that
solutions to the approximate incremental minimization problem at the bulk
converge to energetic solutions to the reduced model. This result provides a
further justification of the latter in the spirit of evolutionary
$\Gamma$-convergence.
|
[{'version': 'v1', 'created': 'Fri, 10 Sep 2021 13:20:46 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Jan 2023 09:17:52 GMT'}]
|
2023-01-25
|
[array(['Bresciani', 'Marco', ''], dtype=object)
array(['Kružík', 'Martin', ''], dtype=object)]
|
2,845 |
0809.1991
|
Stefan Bara\'nczuk
|
Stefan Bara\'nczuk
|
On a generalization of the support problem of Erdos and its analogues
for abelian varieties and K-theory
|
Corrected proof of Theorem 3.1 and formulation of Theorem 1.1
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider certain local-global principles for Mordell-Weil
type groups over number fields like S-units, abelian varieties and algebraic
K-theory groups
|
[{'version': 'v1', 'created': 'Thu, 11 Sep 2008 13:13:54 GMT'}
{'version': 'v2', 'created': 'Fri, 26 Sep 2008 11:32:19 GMT'}
{'version': 'v3', 'created': 'Tue, 28 Oct 2008 14:32:05 GMT'}]
|
2008-10-28
|
[array(['Barańczuk', 'Stefan', ''], dtype=object)]
|
2,846 |
2109.07598
|
Matt Roth
|
Matt A. Roth, Mark R. Krumholz, Roland M. Crocker and Silvia Celli
|
The diffuse $\gamma$-ray background is dominated by star-forming
galaxies
|
18 pages, 10 figures. This work has been published in Nature. The
version deposited here is the author's pre-print and may not reflect
post-acceptance corrections or formatting related changes. The published
version (Version of Record) of this manuscript is available at
https://www.nature.com/articles/s41586-021-03802-x
|
Nature 597, 341-344 (2021)
|
10.1038/s41586-021-03802-x
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Fermi Gamma-ray Space Telescope has revealed a diffuse $\gamma$-ray
background at energies from 0.1 GeV to 1 TeV, which can be separated into
Galactic emission and an isotropic, extragalactic component. Previous efforts
to understand the latter have been hampered by the lack of physical models
capable of predicting the $\gamma$-ray emission produced by the many candidate
sources, primarily active galactic nuclei and star-forming galaxies, leaving
their contributions poorly constrained. Here we present a calculation of the
contribution of star-forming galaxies to the $\gamma$-ray background that does
not rely on empirical scalings, and is instead based on a physical model for
the $\gamma$-ray emission produced when cosmic rays accelerated in supernova
remnants interact with the interstellar medium. After validating the model
against local observations, we apply it to the observed cosmological
star-forming galaxy population and recover an excellent match to both the total
intensity and the spectral slope of the $\gamma$-ray background, demonstrating
that star-forming galaxies alone can explain the full diffuse, isotropic
$\gamma$-ray background.
|
[{'version': 'v1', 'created': 'Wed, 15 Sep 2021 22:20:59 GMT'}]
|
2021-09-17
|
[array(['Roth', 'Matt A.', ''], dtype=object)
array(['Krumholz', 'Mark R.', ''], dtype=object)
array(['Crocker', 'Roland M.', ''], dtype=object)
array(['Celli', 'Silvia', ''], dtype=object)]
|
2,847 |
0802.3735
|
Dmitry Matyushov V
|
David N. LeBard, Vitaliy Kapko, Dmitry V. Matyushov
|
Energetics and Kinetics of Primary Charge Separation in Bacterial
Photosynthesis
|
26 pp, 17 figs
| null | null | null |
physics.bio-ph physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the results of Molecular Dynamics (MD) simulations and formal
modeling of the free energy surfaces and reaction rates of primary charge
separation in the reaction center of \textit{Rhodobacter sphaeroides}. Two
simulation protocols were used to produce MD trajectories. Standard force field
potentials were employed in the first protocol. In the second protocol, the
special pair was made polarizable to reproduce a high polarizability of its
photoexcited state observed by Stark spectroscopy. The charge distribution
between covalent and charge-transfer states of the special pair was dynamically
adjusted during the simulation run. We found from both protocols that the
breadth of electrostatic fluctuations of the protein/water environment far
exceeds previous estimates resulting in about 1.6 eV reorganization energy of
electron transfer in the first protocol and 2.5 eV in the second protocol. Most
of these electrostatic fluctuations become dynamically frozen on the time-scale
of primary charge separation resulting in much smaller solvation contributions
to the activation barrier. A non-ergodic formulation of the diffusion-reaction
electron transfer kinetics has allowed us to reproduce the experimental results
for both the temperature dependence of the rate and the non-exponential decay
of the population of the photoexcited special pair.
|
[{'version': 'v1', 'created': 'Tue, 26 Feb 2008 02:30:30 GMT'}]
|
2008-02-27
|
[array(['LeBard', 'David N.', ''], dtype=object)
array(['Kapko', 'Vitaliy', ''], dtype=object)
array(['Matyushov', 'Dmitry V.', ''], dtype=object)]
|
2,848 |
1003.4163
|
Thomas Gasenzer
|
Thomas Gasenzer, Stefan Kessler, and Jan M. Pawlowski
|
Far-from-equilibrium quantum many-body dynamics
|
20 pp., 6 figs; submitted version with added references and typos
corrected.
|
Eur.Phys.J.C70:423-443,2010
|
10.1140/epjc/s10052-010-1430-3
|
HD-THEP-10-02
|
cond-mat.quant-gas hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The theory of real-time quantum many-body dynamics as put forward in Ref.
[arXiv:0710.4627] is evaluated in detail. The formulation is based on a
generating functional of correlation functions where the Keldysh contour is
closed at a given time. Extending the Keldysh contour from this time to a later
time leads to a dynamic flow of the generating functional. This flow describes
the dynamics of the system and has an explicit causal structure. In the present
work it is evaluated within a vertex expansion of the effective action leading
to time evolution equations for Green functions. These equations are applicable
for strongly interacting systems as well as for studying the late-time
behaviour of nonequilibrium time evolution. For the specific case of a bosonic
N-component phi^4 theory with contact interactions an s-channel truncation is
identified to yield equations identical to those derived from the 2PI effective
action in next-to-leading order of a 1/N expansion. The presented approach
allows to directly obtain non-perturbative dynamic equations beyond the widely
used 2PI approximations.
|
[{'version': 'v1', 'created': 'Mon, 22 Mar 2010 14:03:40 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Apr 2010 21:17:26 GMT'}]
|
2011-02-09
|
[array(['Gasenzer', 'Thomas', ''], dtype=object)
array(['Kessler', 'Stefan', ''], dtype=object)
array(['Pawlowski', 'Jan M.', ''], dtype=object)]
|
2,849 |
2205.14341
|
Guillaume Barnier
|
Guillaume Barnier, Ettore Biondi, Robert G. Clapp, and Biondo Biondi
|
Full waveform inversion by model extension: theory, design and
optimization
|
45 pages, 44 figures
| null | null | null |
physics.geo-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We describe a new method, full waveform inversion by model extension (FWIME)
that recovers accurate acoustic subsurface velocity models from seismic data,
when conventional methods fail. We leverage the advantageous convergence
properties of wave-equation migration velocity analysis (WEMVA) with the
accuracy and high-resolution nature of acoustic full waveform inversion (FWI)
by combining them into a robust mathematically-consistent workflow with minimal
need for user inputs. The novelty of FWIME resides in the design of a new cost
function using the variable projection method, and a novel optimization
strategy to combine the two techniques, making our approach more efficient and
powerful than applying them sequentially. We observe that FWIME mitigates the
need for accurate initial models and low-frequency long-offset data, which can
be challenging to acquire. We generate three cycle-skipped 2D synthetic
datasets, each containing only one type of wave (transmitted, reflected,
refracted), and we analyze how FWIME successfully recovers accurate solutions
with the same procedure for all three cases. In a second paper, we apply FWIME
to challenging realistic examples where we simultaneously invert all wave
modes.
|
[{'version': 'v1', 'created': 'Sat, 28 May 2022 05:25:26 GMT'}]
|
2022-05-31
|
[array(['Barnier', 'Guillaume', ''], dtype=object)
array(['Biondi', 'Ettore', ''], dtype=object)
array(['Clapp', 'Robert G.', ''], dtype=object)
array(['Biondi', 'Biondo', ''], dtype=object)]
|
2,850 |
2012.06216
|
Cristian Ciraci
|
Federico De Luca, Michele Ortolani, Cristian Cirac\`i
|
Free electron nonlinearities in heavily doped semiconductors plasmonics
| null |
Phys. Rev. B 103, 115305 (2021)
|
10.1103/PhysRevB.103.115305
| null |
physics.optics cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Heavily doped semiconductors have emerged as tunable low-loss plasmonic
materials at mid-infrared frequencies. In this article we investigate nonlinear
optical phenomena associated with high concentration of free electrons. We use
a hydrodynamic description to study free electron dynamics in heavily doped
semiconductors up to third-order terms, which are usually negligible for noble
metals. We find that cascaded third-harmonic generation due to second-harmonic
signals can be as strong as direct third-harmonic generation contributions even
when the second-harmonic generation efficiency is zero. Moreover, we show that
when coupled with plasmonic enhancement free electron nonlinearities could be
up to two orders of magnitude larger than conventional semiconductor
nonlinearities. Our study might open a new route for nonlinear optical
integrated devices at mid-infrared frequencies.
|
[{'version': 'v1', 'created': 'Fri, 11 Dec 2020 09:58:58 GMT'}]
|
2021-03-17
|
[array(['De Luca', 'Federico', ''], dtype=object)
array(['Ortolani', 'Michele', ''], dtype=object)
array(['Ciracì', 'Cristian', ''], dtype=object)]
|
2,851 |
1709.06833
|
Jan Matou\v{s}ek
|
J. Matousek, M. Finger, M. Finger Jr., M. Pesek, A. Berlin, F.
Gautheron, W. Meyer, G. Reicherz, N. Doshita, T. Iwata, K. Kondo, Y. Miyachi,
H. Matsuda, G. Nukazuka, N. Horikawa, H. Suzuki, S. Ishimoto, Y. Kisselev, J.
Koivuniemi, and T. Tatsuro
|
Polarised target for Drell-Yan experiment in COMPASS at CERN, part I
|
4 pages, 2 figures, Proceedings of the 22nd International Spin
Symposium, Urbana-Champaign, Illinois, USA, 25-30 September 2016
| null | null | null |
physics.ins-det hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the polarised Drell-Yan experiment at the COMPASS facility in CERN pion
beam with momentum of 190 GeV/c and intensity about $10^8$ pions/s interacted
with transversely polarised NH$_3$ target. Muon pairs produced in Drel-Yan
process were detected. The measurement was done in 2015 as the 1st ever
polarised Drell-Yan fixed target experiment. The hydrogen nuclei in the
solid-state NH$_3$ were polarised by dynamic nuclear polarisation in 2.5 T
field of large-acceptance superconducting magnet. Large helium dilution
cryostat was used to cool the target down below 100 mK. Polarisation of
hydrogen nuclei reached during the data taking was about 80 %. Two oppositely
polarised target cells, each 55 cm long and 4 cm in diameter were used.
Overview of COMPASS facility and the polarised target with emphasis on the
dilution cryostat and magnet is given. Results of the polarisation measurement
in the Drell-Yan run and overviews of the target material, cell and dynamic
nuclear polarisation system are given in the part II.
|
[{'version': 'v1', 'created': 'Wed, 20 Sep 2017 12:30:06 GMT'}]
|
2017-09-21
|
[array(['Matousek', 'J.', ''], dtype=object)
array(['Finger', 'M.', ''], dtype=object)
array(['Finger', 'M.', 'Jr.'], dtype=object)
array(['Pesek', 'M.', ''], dtype=object)
array(['Berlin', 'A.', ''], dtype=object)
array(['Gautheron', 'F.', ''], dtype=object)
array(['Meyer', 'W.', ''], dtype=object)
array(['Reicherz', 'G.', ''], dtype=object)
array(['Doshita', 'N.', ''], dtype=object)
array(['Iwata', 'T.', ''], dtype=object)
array(['Kondo', 'K.', ''], dtype=object)
array(['Miyachi', 'Y.', ''], dtype=object)
array(['Matsuda', 'H.', ''], dtype=object)
array(['Nukazuka', 'G.', ''], dtype=object)
array(['Horikawa', 'N.', ''], dtype=object)
array(['Suzuki', 'H.', ''], dtype=object)
array(['Ishimoto', 'S.', ''], dtype=object)
array(['Kisselev', 'Y.', ''], dtype=object)
array(['Koivuniemi', 'J.', ''], dtype=object)
array(['Tatsuro', 'T.', ''], dtype=object)]
|
2,852 |
1109.3838
|
Zhongkui Li
|
Zhongkui Li, Xiangdong Liu, Wei Ren, Lihua Xie
|
Distributed Consensus of Linear Multi-Agent Systems with Adaptive
Dynamic Protocols
|
17 pages, 5 figues
|
Automatica, 49: 1986-1995, 2013
|
10.1016/j.automatica.2013.03.015
| null |
cs.SY math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper considers the distributed consensus problem of multi-agent systems
with general continuous-time linear dynamics. Two distributed adaptive dynamic
consensus protocols are proposed, based on the relative output information of
neighboring agents. One protocol assigns an adaptive coupling weight to each
edge in the communication graph while the other uses an adaptive coupling
weight for each node. These two adaptive protocols are designed to ensure that
consensus is reached in a fully distributed fashion for any undirected
connected communication graphs without using any global information. A
sufficient condition for the existence of these adaptive protocols is that each
agent is stabilizable and detectable. The cases with leader-follower and
switching communication graphs are also studied.
|
[{'version': 'v1', 'created': 'Sun, 18 Sep 2011 03:02:33 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Sep 2011 22:40:05 GMT'}]
|
2015-01-20
|
[array(['Li', 'Zhongkui', ''], dtype=object)
array(['Liu', 'Xiangdong', ''], dtype=object)
array(['Ren', 'Wei', ''], dtype=object)
array(['Xie', 'Lihua', ''], dtype=object)]
|
2,853 |
2005.00596
|
Zhuolin Jiang
|
Zhuolin Jiang, Jan Silovsky, Man-Hung Siu, William Hartmann, Herbert
Gish, Sancar Adali
|
Learning from Noisy Labels with Noise Modeling Network
| null | null | null | null |
cs.CV cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multi-label image classification has generated significant interest in recent
years and the performance of such systems often suffers from the not so
infrequent occurrence of incorrect or missing labels in the training data. In
this paper, we extend the state-of the-art of training classifiers to jointly
deal with both forms of errorful data. We accomplish this by modeling noisy and
missing labels in multi-label images with a new Noise Modeling Network (NMN)
that follows our convolutional neural network (CNN), integrates with it,
forming an end-to-end deep learning system, which can jointly learn the noise
distribution and CNN parameters. The NMN learns the distribution of noise
patterns directly from the noisy data without the need for any clean training
data. The NMN can model label noise that depends only on the true label or is
also dependent on the image features. We show that the integrated NMN/CNN
learning system consistently improves the classification performance, for
different levels of label noise, on the MSR-COCO dataset and MSR-VTT dataset.
We also show that noise performance improvements are obtained when multiple
instance learning methods are used.
|
[{'version': 'v1', 'created': 'Fri, 1 May 2020 20:32:22 GMT'}]
|
2020-05-05
|
[array(['Jiang', 'Zhuolin', ''], dtype=object)
array(['Silovsky', 'Jan', ''], dtype=object)
array(['Siu', 'Man-Hung', ''], dtype=object)
array(['Hartmann', 'William', ''], dtype=object)
array(['Gish', 'Herbert', ''], dtype=object)
array(['Adali', 'Sancar', ''], dtype=object)]
|
2,854 |
hep-th/9911088
|
J. Erickson
|
J.K. Erickson, G.W. Semenoff, R.J. Szabo and K. Zarembo
|
Static Potential in N=4 Supersymmetric Yang-Mills Theory
|
8 pages, four figures using feynmf
|
Phys.Rev. D61 (2000) 105006
|
10.1103/PhysRevD.61.105006
| null |
hep-th
| null |
We compute the leading order perturbative correction to the static potential
in ${\cal N}=4$ supersymmetric Yang-Mills theory. We show that the perturbative
expansion contains infrared logarithms which, when resummed, become logarithms
of the coupling constant. The resulting correction goes in the right direction
to match the strong coupling behavior obtained from the AdS/CFT correspondence.
We find that the strong coupling extrapolation of the sum of ladder diagrams
goes as $\sqrt{g^2N}$, as in the supergravity approach.
|
[{'version': 'v1', 'created': 'Fri, 12 Nov 1999 08:01:48 GMT'}]
|
2009-10-31
|
[array(['Erickson', 'J. K.', ''], dtype=object)
array(['Semenoff', 'G. W.', ''], dtype=object)
array(['Szabo', 'R. J.', ''], dtype=object)
array(['Zarembo', 'K.', ''], dtype=object)]
|
2,855 |
1501.00439
|
Kazem Bitaghsir Fadafan
|
Kazem Bitaghsir Fadafan, Seyed Kamal Tabatabaei
|
The Imaginary Potential and Thermal Width of Moving Quarkonium from
Holography
|
16 pages, 15 figures. v2:clarifying remarks added and typos
corrected, unchanged results. arXiv admin note: text overlap with
arXiv:1308.3971
| null |
10.1088/0954-3899/43/9/095001
| null |
hep-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the effect of finite 't Hooft coupling corrections on the imaginary
potential and the thermal width of a moving heavy quarkonium from the AdS/CFT
correspondence. To study these corrections, we consider $\mathcal{R}^4$ terms
and Gauss$-$Bonnet gravity. We conclude that the imaginary potential of a
moving or static heavy quarkonium starts to be generated for smaller distances
of quark and antiquark. Similar to the case of static heavy quarkonium, it is
shown that by considering the corrections the thermal width becomes effectively
smaller. The results are compared with analogous calculations in a weakly
coupled plasma.
|
[{'version': 'v1', 'created': 'Fri, 2 Jan 2015 17:26:13 GMT'}
{'version': 'v2', 'created': 'Mon, 12 Jan 2015 20:08:02 GMT'}]
|
2016-08-24
|
[array(['Fadafan', 'Kazem Bitaghsir', ''], dtype=object)
array(['Tabatabaei', 'Seyed Kamal', ''], dtype=object)]
|
2,856 |
2104.08619
|
Guillermo Navas Palencia
|
Guillermo Navas-Palencia
|
Optimal Counterfactual Explanations for Scorecard modelling
| null | null | null | null |
cs.LG math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Counterfactual explanations is one of the post-hoc methods used to provide
explainability to machine learning models that have been attracting attention
in recent years. Most examples in the literature, address the problem of
generating post-hoc explanations for black-box machine learning models after
the rejection of a loan application. In contrast, in this work, we investigate
mathematical programming formulations for scorecard models, a type of
interpretable model predominant within the banking industry for lending. The
proposed mixed-integer programming formulations combine objective functions to
ensure close, realistic and sparse counterfactuals using multi-objective
optimization techniques for a binary, probability or continuous outcome.
Moreover, we extend these formulations to generate multiple optimal
counterfactuals simultaneously while guaranteeing diversity. Experiments on two
real-world datasets confirm that the presented approach can generate optimal
diverse counterfactuals addressing desired properties with assumable CPU times
for practice use.
|
[{'version': 'v1', 'created': 'Sat, 17 Apr 2021 18:51:50 GMT'}
{'version': 'v2', 'created': 'Sun, 9 May 2021 17:20:17 GMT'}]
|
2021-05-11
|
[array(['Navas-Palencia', 'Guillermo', ''], dtype=object)]
|
2,857 |
1603.07641
|
Prithu Banerjee
|
Prithu Banerjee, Sayan Ranu, Sriram Raghavan
|
Inferring Uncertain Trajectories from Partial Observations
| null | null |
10.1109/ICDM.2014.41
| null |
cs.DB
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The explosion in the availability of GPS-enabled devices has resulted in an
abundance of trajectory data. In reality, however, majority of these
trajectories are collected at a low sampling rate and only provide partial
observations on their actually traversed routes. Consequently, they are mired
with uncertainty. In this paper, we develop a technique called InferTra to
infer uncertain trajectories from network-constrained partial observations.
Rather than predicting the most likely route, the inferred uncertain trajectory
takes the form of an edge-weighted graph and summarizes all probable routes in
a holistic manner. For trajectory inference, InferTra employs Gibbs sampling by
learning a Network Mobility Model (NMM) from a database of historical
trajectories. Extensive experiments on real trajectory databases show that the
graph-based approach of InferTra is up to 50% more accurate, 20 times faster,
and immensely more versatile than state-of-the-art techniques.
|
[{'version': 'v1', 'created': 'Thu, 24 Mar 2016 16:27:42 GMT'}]
|
2016-03-25
|
[array(['Banerjee', 'Prithu', ''], dtype=object)
array(['Ranu', 'Sayan', ''], dtype=object)
array(['Raghavan', 'Sriram', ''], dtype=object)]
|
2,858 |
2202.06636
|
Yize Zhao
|
Xinyuan Tian, Maria Ciarleglio, Jiachen Cai, Erich Greene, Denise
Esserman, Fan Li and Yize Zhao
|
Bayesian semi-parametric inference for clustered recurrent events with
zero-inflation and a terminal event/4163305
| null | null | null | null |
stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recurrent event data are common in clinical studies when participants are
followed longitudinally, and are often subject to a terminal event. With the
increasing popularity of large pragmatic trials with a heterogeneous source
population, participants are often nested in clinics and can be either
susceptible or structurally unsusceptible to the recurrent process. These
complications require new modeling strategies to accommodate potential
zero-event inflation as well as hierarchical data structures in both the
terminal and non-terminal event processes. In this paper, we develop a Bayesian
semi-parametric model to jointly characterize the zero-inflated recurrent event
process and the terminal event process. We use a point mass mixture of
non-homogeneous Poisson processes to describe the recurrent intensity and
introduce shared random effects from different sources to bridge the
non-terminal and terminal event processes. To achieve robustness, we consider
nonparametric Dirichlet processes to model the residual of the accelerated
failure time model for the survival process as well as the cluster-specific
frailty distribution, and develop a Markov Chain Monte Carlo algorithm for
posterior inference. We demonstrate the superiority of our proposed model
compared with competing models via simulations and apply our method to a
pragmatic cluster randomized trial for fall injury prevention among the
elderly.
|
[{'version': 'v1', 'created': 'Mon, 14 Feb 2022 11:44:11 GMT'}
{'version': 'v2', 'created': 'Mon, 5 Dec 2022 04:33:01 GMT'}]
|
2022-12-06
|
[array(['Tian', 'Xinyuan', ''], dtype=object)
array(['Ciarleglio', 'Maria', ''], dtype=object)
array(['Cai', 'Jiachen', ''], dtype=object)
array(['Greene', 'Erich', ''], dtype=object)
array(['Esserman', 'Denise', ''], dtype=object)
array(['Li', 'Fan', ''], dtype=object)
array(['Zhao', 'Yize', ''], dtype=object)]
|
2,859 |
1503.00620
|
Ole L Trinhammer
|
Ole L. Trinhammer, Henrik G. Bohr, Mogens Stibius Jensen
|
The Higgs mass derived from the U(3) Lie group
|
18 pages, 13 figures, 3 tables
|
International Journal of Modern Physics A 30, No. 14 (2015)
1550078 (Open Access, 34 pages)
|
10.1142/S0217751X15500785
| null |
physics.gen-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Higgs mass value is derived from a Hamiltonian on the Lie group U(3)
where we relate strong and electroweak energy scales. The baryon states of
nucleon and delta resonances originate in specific Bloch wave degrees of
freedom coupled to a Higgs mechanism which also gives rise to the usual gauge
boson masses. The derived Higgs mass is around 125 GeV. From the same
Hamiltonian we derive the relative neutron to proton mass ratio and the N and
Delta mass spectra. All compare rather well with the experimental values. We
predict scarce neutral flavor baryon singlets that should be visible in
scattering cross sections for negative pions on protons, in photoproduction on
neutrons, in neutron diffraction dissociation experiments and in invariant mass
spectra of protons and negative pions in B-decays. The fundamental predictions
are based on just one length scale and the fine structure constant. More
particular predictions rely also on the weak mixing angle and the up-down quark
flavor mixing matrix element. With differential forms on the measure-scaled
wavefunction, we could generate approximate parton distribution functions for
the u and d valence quarks of the proton that compare well with established
experimental analysis.
|
[{'version': 'v1', 'created': 'Sun, 7 Dec 2014 17:53:59 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Jul 2015 11:50:19 GMT'}]
|
2015-07-08
|
[array(['Trinhammer', 'Ole L.', ''], dtype=object)
array(['Bohr', 'Henrik G.', ''], dtype=object)
array(['Jensen', 'Mogens Stibius', ''], dtype=object)]
|
2,860 |
1501.05229
|
Teodor Banica
|
Teodor Banica
|
Quantum isometries of noncommutative polygonal spheres
|
30 pages
|
Munster J. Math. 8 (2015), 253-284
| null | null |
math.OA math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The real sphere $S^{N-1}_\mathbb R$ appears as increasing union, over
$d\in\{1,...,N\}$, of its "polygonal" versions $S^{N-1,d-1}_\mathbb R=\{x\in
S^{N-1}_\mathbb R|x_{i_0}... x_{i_d}=0,\forall i_0,...,i_d\ {\rm distinct}\}$.
Motivated by general classification questions for the undeformed noncommutative
spheres, smooth or not, we study here the quantum isometries of
$S^{N-1,d-1}_\mathbb R$, and of its various noncommutative analogues, obtained
via liberation and twisting. We discuss as well a complex version of these
results, with $S^{N-1}_\mathbb R$ replaced by the complex sphere
$S^{N-1}_\mathbb C$.
|
[{'version': 'v1', 'created': 'Wed, 21 Jan 2015 17:00:46 GMT'}
{'version': 'v2', 'created': 'Tue, 5 May 2015 17:48:45 GMT'}]
|
2016-08-23
|
[array(['Banica', 'Teodor', ''], dtype=object)]
|
2,861 |
1606.09033
|
Jacek Rozynek
|
J. Rozynek and G. Wilk
|
An example of the interplay of nonextensivity and dynamics in the
description of QCD matter
|
Comments: accepted in EPJA 2016 the previous version (3) contained
different work (with different title), was created by mistake and will
shifted to arXiv:1810.07008 soon
|
Eur.Phys.J A52(2016)294
|
10.1140/epja/i2016-16294-7
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using a simple quasi-particle model of QCD matter, presented some time ago in
the literature, in which interactions are modelled by some effective fugacities
z, we investigate the interplay between the dynamical content of fugacities z
and effects induced by nonextensivity in situations when this model is used in
a nonextensive environment characterized by some nonextensive parameter q
$\neq$ 1 (for the usual extensive case q=1). This allows for a better
understanding of the role of nonextensivity in the more complicated
descriptions of dense hadronic and QCD matter recently presented (in which
dynamics is defined by a lagrangian, the form of which is specific to a given
model).
|
[{'version': 'v1', 'created': 'Wed, 29 Jun 2016 10:27:31 GMT'}
{'version': 'v2', 'created': 'Mon, 15 Aug 2016 19:38:38 GMT'}
{'version': 'v3', 'created': 'Mon, 18 Mar 2019 17:43:05 GMT'}
{'version': 'v4', 'created': 'Wed, 20 Mar 2019 15:23:29 GMT'}]
|
2019-03-21
|
[array(['Rozynek', 'J.', ''], dtype=object)
array(['Wilk', 'G.', ''], dtype=object)]
|
2,862 |
2007.11225
|
Elissaios Stavrou
|
Elissaios Stavrou, Michael Bagge-Hansen, Joshua A. Hammons, Michael H.
Nielsen, Bradley A. Steele, Penghao Xiao, Matthew P. Kroonblawd, Matthew D.
Nelms, William L. Shaw, Will Bassett, Sorin Bastea, Lisa M. Lauderbach, Ralph
L. Hodgin, Nicholas A. Perez-Marty, Saransh Singh, Pinaki Das, Yuelin Li,
Adam Schuman, Nicholas Sinclair, Kamel Fezzaa, Alex Deriy, Lara D. Leininger,
and Trevor M. Willey
|
Detonation-induced transformation of graphite to hexagonal diamond
| null |
Phys. Rev. B 102, 104116 (2020)
|
10.1103/PhysRevB.102.104116
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We explore the structural evolution of highly oriented pyrolytic graphite
(HOPG) under detonation-induced shock conditions using in-situ synchrotron
X-ray diffraction in the ns time scale. We observe the formation of hexagonal
diamond (lonsdaleite) at pressures above 50 GPa, in qualitative agreement with
recent gas gun experiments. First-principles density functional calculations
reveal that under uniaxial compression the energy barrier for the transition
towards hexagonal diamond is lower than cubic diamond. Finally, no indication
of cubic diamond formation was observed up to >70 GPa.
|
[{'version': 'v1', 'created': 'Wed, 22 Jul 2020 06:27:36 GMT'}]
|
2020-10-07
|
[array(['Stavrou', 'Elissaios', ''], dtype=object)
array(['Bagge-Hansen', 'Michael', ''], dtype=object)
array(['Hammons', 'Joshua A.', ''], dtype=object)
array(['Nielsen', 'Michael H.', ''], dtype=object)
array(['Steele', 'Bradley A.', ''], dtype=object)
array(['Xiao', 'Penghao', ''], dtype=object)
array(['Kroonblawd', 'Matthew P.', ''], dtype=object)
array(['Nelms', 'Matthew D.', ''], dtype=object)
array(['Shaw', 'William L.', ''], dtype=object)
array(['Bassett', 'Will', ''], dtype=object)
array(['Bastea', 'Sorin', ''], dtype=object)
array(['Lauderbach', 'Lisa M.', ''], dtype=object)
array(['Hodgin', 'Ralph L.', ''], dtype=object)
array(['Perez-Marty', 'Nicholas A.', ''], dtype=object)
array(['Singh', 'Saransh', ''], dtype=object)
array(['Das', 'Pinaki', ''], dtype=object)
array(['Li', 'Yuelin', ''], dtype=object)
array(['Schuman', 'Adam', ''], dtype=object)
array(['Sinclair', 'Nicholas', ''], dtype=object)
array(['Fezzaa', 'Kamel', ''], dtype=object)
array(['Deriy', 'Alex', ''], dtype=object)
array(['Leininger', 'Lara D.', ''], dtype=object)
array(['Willey', 'Trevor M.', ''], dtype=object)]
|
2,863 |
1104.0685
|
Oskar Kedzierski
|
Oskar Kedzierski and Jaroslaw A. Wisniewski
|
Differentials of Cox rings: Jaczewski's theorem revisited
|
15 pages. The present version corrects errors/gaps from the previous
one
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A generalized Euler sequence over a complete normal variety X is the unique
extension of the trivial bundle V \otimes O_X by the sheaf of differentials
\Omega_X, given by the inclusion of a linear space V in Ext^1(O_X,\Omega_X).
For \Lambda, a lattice of Cartier divisors, let R_\Lambda denote the
corresponding sheaf associated to V spanned by the first Chern classes of
divisors in \Lambda. We prove that any projective, smooth variety on which the
bundle R_\Lambda splits into a direct sum of line bundles is toric. We describe
the bundle R_\Lambda in terms of the sheaf of differentials on the
characteristic space of the Cox ring, provided it is finitely generated.
Moreover, we relate the finiteness of the module of sections of R_\Lambda and
of the Cox ring of \Lambda.
|
[{'version': 'v1', 'created': 'Mon, 4 Apr 2011 20:34:29 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Feb 2012 11:22:49 GMT'}
{'version': 'v3', 'created': 'Wed, 28 Nov 2012 13:00:25 GMT'}]
|
2012-11-29
|
[array(['Kedzierski', 'Oskar', ''], dtype=object)
array(['Wisniewski', 'Jaroslaw A.', ''], dtype=object)]
|
2,864 |
physics/0611176
|
Ilya Shkrob
|
Ilya A. Shkrob (ANL), William J. Glover (UCLA), Ross E. Larsen (UCLA),
Benjamin J. Schwartz (UCLA)
|
The structure of the hydrated electron. Part 2. A mixed quantum
classical molecular dynamics - embedded cluster density functional theory:
single-excitation configuration interaction study
|
68 pages, 12 figures + 16 more figures in the supplement (included)
submitted to J Phys Chem A
| null |
10.1021/jp0682816
| null |
physics.data-an
| null |
Adiabatic mixed quantum/classical molecular dynamics simulations were used to
generate snapshots of the hydrated electron (e-) in liquid water at 300 K.
Water cluster anions that include two complete solvation shells centered on the
e- were extracted from these simulations and embedded in a matrix of fractional
point charges designed to represent the rest of the solvent. Density functional
theory and single-excitation configuration interaction methods were then
applied to these embedded clusters. The salient feature of these hybrid
calculations is significant transfer (ca. 0.18) of the excess electron's charge
density into the O 2p orbitals in OH groups forming the solvation cavity. We
used the results of these calculations to examine the structure of the
molecular orbitals, the density of states, the absorption spectra in the
visible and ultraviolet, the hyperfine coupling (hfc) tensors, and the IR and
Raman spectra of the e-. The calculated hfc tensors were used to compute the
EPR and ESEEM spectra for the e- that compared favorably to the experimental
spectra of trapped e- in alkaline ice. The calculated vibrational spectra of
the e- are consistent with the red-shifted bending and stretching frequencies
observed in resonance Raman experiments. The model also accounts for the VIS
and 190-nm absorption bands of the e-. Thus, our study suggests that to explain
several important experimentally observed properties of the e-, many-electron
effects must be accounted for.
|
[{'version': 'v1', 'created': 'Mon, 20 Nov 2006 18:48:44 GMT'}
{'version': 'v2', 'created': 'Sat, 2 Dec 2006 17:59:39 GMT'}]
|
2016-09-28
|
[array(['Shkrob', 'Ilya A.', '', 'ANL'], dtype=object)
array(['Glover', 'William J.', '', 'UCLA'], dtype=object)
array(['Larsen', 'Ross E.', '', 'UCLA'], dtype=object)
array(['Schwartz', 'Benjamin J.', '', 'UCLA'], dtype=object)]
|
2,865 |
1712.06740
|
Shohei Hayashida
|
Shohei Hayashida, Hajime Ishikawa, Yoshihiko Okamoto, Tsuyoshi Okubo,
Zenji Hiroi, Maxim Avdeev, Pascal Manuel, Masato Hagihala, Minoru Soda, and
Takatsugu Masuda
|
Magnetic State Selected by Magnetic Dipole Interaction in Kagome
Antiferromagnet NaBa$_{2}$Mn$_{3}$F$_{11}$
| null |
Phys. Rev. B 97, 054411 (2018)
|
10.1103/PhysRevB.97.054411
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have studied the ground state of the classical Kagome antiferromagnet
NaBa$_{2}$Mn$_{3}$F$_{11}$. Strong magnetic Bragg peaks observed in the
$d$-spacing shorter than 6.0 \AA\ were indexed by the propagation vectors of
$\boldsymbol{k}_{0} = (0,0,0)$. Additional peaks with weak intensities in the
range of the $d$-spacing longer than 8.0 \AA\ were indexed by the
incommensurate vectors of $\boldsymbol{k}_{1}=(0.3209(2),0.3209(2),0)$ and
$\boldsymbol{k}_{2}=(0.3338(4),0.3338(4),0)$. Magnetic structure analysis
exhibits that the 120$^{\circ}$ structure with the {\it tail-chase} geometry
having $\boldsymbol{k}_0$ is modulated by the incommensurate vectors. The
classical calculation of the Kagome Heisenberg antiferromagnet having the
antiferromagnetic 2nd-neighbor interaction, the ground state of which is
degenerated 120$^{\circ}$ structures with $\boldsymbol{k}_0$, reveals that the
magnetic dipole-dipole (MDD) interaction including up to the 4th neighbor terms
selects the tail-chase structure. The observed modulation of the tail-chase
structure is indicated to be due to a small perturbation such as the long-range
MDD interaction or the interlayer interaction.
|
[{'version': 'v1', 'created': 'Tue, 19 Dec 2017 01:28:43 GMT'}
{'version': 'v2', 'created': 'Sun, 18 Feb 2018 06:23:17 GMT'}]
|
2018-02-21
|
[array(['Hayashida', 'Shohei', ''], dtype=object)
array(['Ishikawa', 'Hajime', ''], dtype=object)
array(['Okamoto', 'Yoshihiko', ''], dtype=object)
array(['Okubo', 'Tsuyoshi', ''], dtype=object)
array(['Hiroi', 'Zenji', ''], dtype=object)
array(['Avdeev', 'Maxim', ''], dtype=object)
array(['Manuel', 'Pascal', ''], dtype=object)
array(['Hagihala', 'Masato', ''], dtype=object)
array(['Soda', 'Minoru', ''], dtype=object)
array(['Masuda', 'Takatsugu', ''], dtype=object)]
|
2,866 |
1305.2439
|
Sergio Souza
|
S.R. Souza, B.V. Carlson, R. Donangelo, W.G. Lynch, and M.B. Tsang
|
Statistical multifragmentation model with discretized energy and the
generalized Fermi breakup. I. Formulation of the model
|
8 pages, 6 figures
| null |
10.1103/PhysRevC.88.014607
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Generalized Fermi Breakup recently demonstrated to be formally equivalent
to the Statistical Multifragmentation Model, if the contribution of excited
states are included in the state densities of the former, is implemented. Since
this treatment requires the application of the Statistical Multifragmentation
Model repeatedly on the hot fragments until they have decayed to their ground
states, it becomes extremely computational demanding, making its application to
the systems of interest extremely difficult. Based on exact recursion formulae
previously developed by Chase and Mekjian to calculate the statistical weights
very efficiently, we present an implementation which is efficient enough to
allow it to be applied to large systems at high excitation energies. Comparison
with the GEMINI++ sequential decay code shows that the predictions obtained
with our treatment are fairly similar to those obtained with this more
traditional model.
|
[{'version': 'v1', 'created': 'Fri, 10 May 2013 20:51:57 GMT'}]
|
2014-08-29
|
[array(['Souza', 'S. R.', ''], dtype=object)
array(['Carlson', 'B. V.', ''], dtype=object)
array(['Donangelo', 'R.', ''], dtype=object)
array(['Lynch', 'W. G.', ''], dtype=object)
array(['Tsang', 'M. B.', ''], dtype=object)]
|
2,867 |
1611.09411
|
Christoph Uhlemann
|
Eric D'Hoker, Michael Gutperle and Christoph F. Uhlemann
|
Holographic duals for five-dimensional superconformal quantum field
theories
|
5 pages, Dedicated to John H. Schwarz on the occasion of his seventy
fifth birthday, v2: minor changes, version to appear in PRL, v3: integration
constant c_6 fixed
|
Phys. Rev. Lett. 118, 101601 (2017)
|
10.1103/PhysRevLett.118.101601
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct global solutions to Type IIB supergravity with 16 residual
supersymmetries whose space-time is $AdS_6 \times S^2$ warped over a Riemann
surface. Families of solutions are labeled by an arbitrary number $L\geq 3$ of
asymptotic regions, in each of which the supergravity fields match those of a
$(p,q)$ five-brane, and may therefore be viewed as near-horizon limits of fully
localized intersections of five-branes in Type IIB string theory. These
solutions provide compelling candidates for holographic duals to a large class
of five-dimensional superconformal quantum field theories which arise as
non-trivial UV fixed points of perturbatively non-renormalizable Yang-Mills
theories, thereby making them more directly accessible to quantitative
analysis.
|
[{'version': 'v1', 'created': 'Mon, 28 Nov 2016 22:17:46 GMT'}
{'version': 'v2', 'created': 'Sat, 28 Jan 2017 01:04:01 GMT'}
{'version': 'v3', 'created': 'Sat, 10 Feb 2018 20:57:40 GMT'}]
|
2018-02-13
|
[array(["D'Hoker", 'Eric', ''], dtype=object)
array(['Gutperle', 'Michael', ''], dtype=object)
array(['Uhlemann', 'Christoph F.', ''], dtype=object)]
|
2,868 |
1806.09634
|
Mahdiyar Noorbala
|
Mahdiyar Noorbala, Vincent Vennin, Hooshyar Assadullahi, Hassan
Firouzjahi and David Wands
|
Tunneling in Stochastic Inflation
|
24 pages, 4 figures; matches the published version (references
updated)
|
JCAP09(2018)032
|
10.1088/1475-7516/2018/09/032
| null |
hep-th astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The relative probability to decay towards different vacua during inflation is
studied. The calculation is performed in single-field slow-roll potentials
using the stochastic inflation formalism. Various situations are investigated,
including falling from a local maximum of the potential and escaping from a
local minimum. In the latter case, our result is consistent with that of
Hawking and Moss, but is applicable to any potential. The decay rates are also
computed, and the case of a generic potential with multiple minima and maxima
is discussed.
|
[{'version': 'v1', 'created': 'Mon, 25 Jun 2018 18:00:05 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Jul 2018 17:09:38 GMT'}
{'version': 'v3', 'created': 'Sat, 22 Sep 2018 07:30:57 GMT'}
{'version': 'v4', 'created': 'Wed, 10 Oct 2018 09:39:04 GMT'}]
|
2018-10-11
|
[array(['Noorbala', 'Mahdiyar', ''], dtype=object)
array(['Vennin', 'Vincent', ''], dtype=object)
array(['Assadullahi', 'Hooshyar', ''], dtype=object)
array(['Firouzjahi', 'Hassan', ''], dtype=object)
array(['Wands', 'David', ''], dtype=object)]
|
2,869 |
0809.4246
|
Matias Dahl F.
|
Ioan Bucataru and Matias F. Dahl
|
A geometric space without conjugate points
| null |
Balkan Journal of Geometry and Its Applications, Vol.15, No.1,
2010, pp. 17-40
| null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
From a spray space $S$ on a manifold $M$ we construct a new geometric space
$P$ of larger dimension with the following properties:
1. Geodesics in $P$ are in one-to-one correspondence with parallel Jacobi
fields of $M$.
2. $P$ is complete if and only if $S$ is complete.
3. If two geodesics in $P$ meet at one point, the geodesics coincide on their
common domain, and $P$ has no conjugate points.
4. There exists a submersion $\pi\colon P \to M$ that maps geodesics in $P$
into geodesics on $M$.
Space $P$ is constructed by first taking two complete lifts of spray $S$.
This will give a spray $S^{cc}$ on the second iterated tangent bundle $TTM$.
Then space $P$ is obtained by restricting tangent vectors of geodesics for
$S^{cc}$ onto a suitable $(2\dim M+2)$-dimensional submanifold of $TTTM$. Due
to the last restriction, space $P$ is not a spray space. However, the
construction shows that conjugate points can be removed if we add dimensions
and relax assumptions on the geometric structure.
|
[{'version': 'v1', 'created': 'Wed, 24 Sep 2008 18:33:18 GMT'}]
|
2010-09-20
|
[array(['Bucataru', 'Ioan', ''], dtype=object)
array(['Dahl', 'Matias F.', ''], dtype=object)]
|
2,870 |
1403.7511
|
Alastair Gregory MEng
|
Alastair Logan Gregory, Samuel Sinayoko, Anurag Agarwal, Joan Lasenby
|
An acoustic space-time and the Lorentz transformation in aeroacoustics
|
28 pages (including bibliography)
|
Int.J.Aeroacoust. 14 (2015) 997-1003
| null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we introduce concepts from relativity and geometric algebra to
aeroacoustics. We do this using an acoustic space-time transformation within
the framework of sound propagation in uniform flows. By using Geometric Algebra
we are able to provide a simple geometric interpretation to the space-time
transformation, and are able to give neat and lucid derivations of the
free-field Green's function for the convected wave equation and the Doppler
shift for a stationary observer and a source in uniform rectilinear motion in a
uniform flow.
|
[{'version': 'v1', 'created': 'Fri, 28 Mar 2014 19:39:40 GMT'}
{'version': 'v2', 'created': 'Fri, 13 Feb 2015 15:33:50 GMT'}
{'version': 'v3', 'created': 'Thu, 4 Jun 2015 10:02:52 GMT'}]
|
2015-11-18
|
[array(['Gregory', 'Alastair Logan', ''], dtype=object)
array(['Sinayoko', 'Samuel', ''], dtype=object)
array(['Agarwal', 'Anurag', ''], dtype=object)
array(['Lasenby', 'Joan', ''], dtype=object)]
|
2,871 |
hep-ph/9311326
|
Hitoshi Murayama
|
Hitoshi Murayama (LBL), Hiroshi Suzuki (Genova), T. Yanagida (Tohoku),
and Jun'ichi Yokoyama (YITP, Kyoto)
|
Chaotic Inflation and Baryogenesis in Supergravity
|
YITP/U-93-29, LBL-34887 10 pages, LaTeX file, requires REVTEX 3.0.
Two PostScript figures attached in tar+compress+uuencode format after
\end{document}
|
Phys.Rev.D50:2356-2360,1994
|
10.1103/PhysRevD.50.R2356
| null |
hep-ph
| null |
We propose a K\"ahler potential in supergravity which successfully
accommodates chaotic inflation. This model can have a large gravitino mass
without giving a large mass to squarks and sleptons, and thus is free from both
the gravitino problem and entropy crisis. In this model baryogenesis takes
place naturally, identifying the inflaton with a right-handed sneutrino with
its mass $M \simeq 10^{13}$GeV, which is consistent with the COBE data and the
Mikheyev--Smirnov--Wolfenstein solution to the solar neutrino problem. The
model can also accommodate the matter content appropriate for the mixed dark
matter scenario.
|
[{'version': 'v1', 'created': 'Sun, 21 Nov 1993 21:24:09 GMT'}]
|
2009-09-29
|
[array(['Murayama', 'Hitoshi', '', 'LBL'], dtype=object)
array(['Suzuki', 'Hiroshi', '', 'Genova'], dtype=object)
array(['Yanagida', 'T.', '', 'Tohoku'], dtype=object)
array(['Yokoyama', "Jun'ichi", '', 'YITP, Kyoto'], dtype=object)]
|
2,872 |
1805.12284
|
Kejia Pan
|
Dongdong He and Kejia Pan
|
A three-level linearized difference scheme for the coupled nonlinear
fractional Ginzburg-Landau equation
|
17 pages, 2 figures
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, the coupled fractional Ginzburg-Landau equations are first
time investigated numerically. A linearized implicit finite difference scheme
is proposed. The scheme involves three time levels, is unconditionally stable
and second-order accurate in both time and space variables. The unique
solvability, the unconditional stability and optimal pointwise error estimates
are obtained by using the energy method and mathematical induction. Moreover,
the proposed second-order method can be easily extended into the fourth-order
method by using an average finite difference operator for spatial fractional
derivatives and Richardson extrapolation for time variable. Finally, numerical
results are presented to confirm the theoretical results.
|
[{'version': 'v1', 'created': 'Thu, 31 May 2018 01:34:29 GMT'}]
|
2018-06-01
|
[array(['He', 'Dongdong', ''], dtype=object)
array(['Pan', 'Kejia', ''], dtype=object)]
|
2,873 |
1705.00493
|
Mikhail G. Katz
|
Vladimir Kanovei and Mikhail G. Katz
|
A positive function with vanishing Lebesgue integral in Zermelo-Fraenkel
set theory
|
6 pages, to appear in Real Analysis Exchange
| null | null | null |
math.CA math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Can a positive function on R have zero Lebesgue integral? It depends on how
much choice one has.
Keywords: Lebesgue integral; Zermelo--Fraenkel theory; Feferman-Levy model
|
[{'version': 'v1', 'created': 'Mon, 1 May 2017 12:18:18 GMT'}]
|
2017-05-02
|
[array(['Kanovei', 'Vladimir', ''], dtype=object)
array(['Katz', 'Mikhail G.', ''], dtype=object)]
|
2,874 |
1212.2759
|
Alessandro Chieffi
|
Alessandro Chieffi and Marco Limongi
|
The evolution of rotating solar metallicity stars extending in mass from
13 to 120 msun: the hydrostatic evolution and the explosive yields
|
110 pages including 28 figures and 8 tables
| null | null | null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the first set of a new generation of models of massive stars of
solar composition extending between 13 and 120 \msun, computed with and without
the effects of rotation. We included two instabilities induced by rotation,
namely the meridional circulation and the shear instability. We implemented two
alternative schemes to treat the transport of the angular momentum: the
advection-diffusion formalism and the simpler purely diffusive one. The full
evolution from the Pre Main Sequence up to the presupernova stage is followed
in detail with a very extended nuclear network. The explosive yields are
provided for a variety of possible mass cut and are available at the website
\url{http://www.iasf-roma.inaf.it/orfeo/public{\_}html}.
We find that both the He and the CO core masses are larger than those of
their non rotating counterparts. Also the C abundance left by the He burning is
lower than in the non rotating case, especially for stars of initial mass 13-25
\msun, and this affects the final Mass-Radius relation, basically the final
binding energy, at the presupernova stage. The elemental yields produced by a
generation of stars rotating initially at 300 km/s do not change substantially
with respect to those produced by a generation of non rotating massive stars,
the main differences being a slight overproduction of the weak s-component and
a larger production of F. Since rotation also affects the mass loss rate,
either directly and indirectly, we find substantial differences in the
lifetimes as O-type and WR-subtypes between rotating and non rotating models.
The maximum mass exploding as type IIP supernova ranges between 15 and 20\msun
in both sets of models (this value depending basically on the larger mass loss
rates in the Red Super Giant phase due to the inclusion of the dust driven
wind). This limiting value is in remarkable good agreement with current
estimates.
|
[{'version': 'v1', 'created': 'Wed, 12 Dec 2012 10:17:22 GMT'}]
|
2012-12-13
|
[array(['Chieffi', 'Alessandro', ''], dtype=object)
array(['Limongi', 'Marco', ''], dtype=object)]
|
2,875 |
1404.7087
|
Sandeep Gautam
|
S. Gautam
|
Dynamics of the corotating vortices in dipolar Bose-Einstein condensates
in the presence of dissipation
|
8 pages, 7 figures
|
J. Phys. B: At. Mol. Opt. Phys., Vol. 47, 165301 (2014)
|
10.1088/0953-4075/47/16/165301
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the dynamics of a single and a corotating vortex pair in a dipolar
Bose-Einstein condensate in the framework of dissipative Gross-Pitaevskii
equation. This simple model enables us to simulate the effect of finite
temperature on the vortex dynamics. We study the effect of dipolar interactions
on the dynamics of a single vortex in the presence of phenomenological
dissipation. In the case of a corotating vortex pair, an initial asymmetry in
the locations of the vortices can lead to different decay rates for the
constituent vortices as is the case for the condensates interacting via pure
contact interactions. We observe that the anisotropic interaction between the
component vortices manifests itself as the perceptible difference in the
trajectories traversed by the vortices in the condensate at finite
temperatures.
|
[{'version': 'v1', 'created': 'Mon, 28 Apr 2014 18:45:59 GMT'}
{'version': 'v2', 'created': 'Sat, 3 May 2014 00:06:44 GMT'}
{'version': 'v3', 'created': 'Thu, 17 Jul 2014 16:10:50 GMT'}]
|
2014-08-11
|
[array(['Gautam', 'S.', ''], dtype=object)]
|
2,876 |
0808.3116
|
Yogesh Singh
|
Yogesh Singh, Y. Lee, S. Nandi, A. Kreyssig, A Ellern, S. Das, R.
Nath, B. N. Harmon, A. I. Goldman, and D. C. Johnston
|
Single crystal growth and physical properties of the layered arsenide
BaRh_2As_2
|
Accepted for publication in Phys. Rev. B
|
Phys. Rev. B 78, 104512 (2008); 7 pages
|
10.1103/PhysRevB.78.104512
| null |
cond-mat.supr-con cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Single crystals of BaRh_2As_2 have been synthesized from a Pb flux. We
present the room temperature crystal structure, single crystal x-ray
diffraction measurements as a function of temperature T, anisotropic magnetic
susceptibility \chi versus T, electrical resistivity in the ab-plane \rho
versus T, Hall coefficient versus T and magnetic field H, and heat capacity C
versus T measurements on the crystals. The single crystal structure
determination confirms that BaRh_2As_2 forms in the tetragonal ThCr_2Si_2 type
structure (space group I4/mmm) with lattice parameters a = b = 4.0564(6)\AA and
c = 12.797(4) \AA. Band structure calculations show that BaRh_2As_2 should be
metallic with a small density of states at the Fermi energy N(E_ F) = 3.49
states/eV f.u. (where f.u. \equiv formula unit) for both spin directions.
\rho(T) data in the ab-plane confirm that the material is indeed metallic with
a residual resistivity \rho(2K) = 29 \mu \Omega cm, and with a residual
resistivity ratio \rho(310K)/\rho(2K) = 5.3. The observed \chi(T) is small
(\sim 10^{-5} cm^3/mol) and weakly anisotropic with \chi_{ab}/\chi_ c \approx
2. The C(T) data indicate a small density of states at the Fermi energy with
the low temperature Sommerfeld coefficient \gamma = 4.7(9) mJ/mol K^2. There
are no indications of superconductivity, spin density wave, or structural
transitions between 2K and 300K. We compare the calculated density of states
versus energy of BaRh_2As_2 with that of BaFe_2As_2.
|
[{'version': 'v1', 'created': 'Fri, 22 Aug 2008 18:04:33 GMT'}]
|
2010-11-17
|
[array(['Singh', 'Yogesh', ''], dtype=object)
array(['Lee', 'Y.', ''], dtype=object)
array(['Nandi', 'S.', ''], dtype=object)
array(['Kreyssig', 'A.', ''], dtype=object)
array(['Ellern', 'A', ''], dtype=object)
array(['Das', 'S.', ''], dtype=object)
array(['Nath', 'R.', ''], dtype=object)
array(['Harmon', 'B. N.', ''], dtype=object)
array(['Goldman', 'A. I.', ''], dtype=object)
array(['Johnston', 'D. C.', ''], dtype=object)]
|
2,877 |
cond-mat/9811265
|
Charles M. Marcus
|
A.F.Morpurgo, D.B. Robinson, C.M.Marcus
|
Controlled Fabrication of Metallic Electrodes with Atomic Separation
| null | null |
10.1063/1.123765
| null |
cond-mat.mtrl-sci
| null |
We report a new technique for fabricating metallic electrodes on insulating
substrates with separations on the 1 nm scale. The fabrication technique, which
combines lithographic and electrochemical methods, provides atomic resolution
without requiring sophisticated instrumentation. The process is simple,
controllable, reversible, and robust, allowing rapid fabrication of electrode
pairs with high yield. We expect the method to prove useful in interfacing
molecular-scale structures to macroscopic probes and electronic devices .
|
[{'version': 'v1', 'created': 'Wed, 18 Nov 1998 02:54:50 GMT'}
{'version': 'v2', 'created': 'Sun, 14 Feb 1999 01:13:28 GMT'}]
|
2009-10-31
|
[array(['Morpurgo', 'A. F.', ''], dtype=object)
array(['Robinson', 'D. B.', ''], dtype=object)
array(['Marcus', 'C. M.', ''], dtype=object)]
|
2,878 |
cond-mat/0309699
|
Denis Vodolazov
|
S. Michotte, S. Matefi-Tempfli, L. Piraux, D.Y. Vodolazov, and F.M.
Peeters
|
Condition of the occurrence of phase slip centers in superconducting
nanowires under applied current or voltage
|
13 pages, 15 figures
| null |
10.1103/PhysRevB.69.094512
| null |
cond-mat.supr-con
| null |
Experimental results on the phase slip process in superconducting lead
nanowires are presented under two different experimental conditions: constant
applied current or constant voltage. Based on these experiments we established
a simple model which gives us the condition of the appearance of phase slip
centers in a quasi-one-dimensional wire. It turns out that the competition
between two relaxations times (relaxation time of the absolute value of the
order parameter $\tau_{|\psi|}$ and relaxation time of the phase of the order
parameter in the phase slip center $\tau_{\phi}$) governs the phase slip
process. Phase slip phenomena, as periodic oscillations in time of the order
parameter, is possible only if the gradient of the phase grows faster than the
value of the order parameter in the phase slip center, or equivalently if
$\tau_{\phi}<\tau_{|\psi|}$.
|
[{'version': 'v1', 'created': 'Tue, 30 Sep 2003 09:06:45 GMT'}]
|
2009-11-10
|
[array(['Michotte', 'S.', ''], dtype=object)
array(['Matefi-Tempfli', 'S.', ''], dtype=object)
array(['Piraux', 'L.', ''], dtype=object)
array(['Vodolazov', 'D. Y.', ''], dtype=object)
array(['Peeters', 'F. M.', ''], dtype=object)]
|
2,879 |
0711.2150
|
Jean-Christophe Aval
|
Jean-Christophe Aval (LaBRI)
|
Keys and alternating sign matrices
| null |
Seminaire Lotharingien de Combinatoire 59 (2008) B59f
| null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lascoux and Sch\"utzenberger introduced a notion of key associated to any
Young tableau. More recently Lascoux defined the key of an alternating sign
matrix by recursively removing all -1's in such matrices. But alternating sign
matrices are in bijection with monotone triangles, which form a subclass of
Young tableaux. We show that in this case these two notions of keys coincide.
Moreover we obtain an elegant and direct way to compute the key of any Young
tableau, and discuss consequences of our result.
|
[{'version': 'v1', 'created': 'Wed, 14 Nov 2007 10:29:09 GMT'}
{'version': 'v2', 'created': 'Mon, 18 May 2009 08:21:18 GMT'}]
|
2009-05-18
|
[array(['Aval', 'Jean-Christophe', '', 'LaBRI'], dtype=object)]
|
2,880 |
nucl-th/0510009
|
R. S. Mackintosh
|
R. S. Mackintosh (The Open University, Milton Keynes, UK)
|
Nuclear applications of inverse scattering, present ... and future?
|
8 pages, 3 figures, LaTeX. Invited talk presented at Conference,
Perspectives on Nuclear Data for the Next Decade, Bruyeres-le-Chatel, 26-28
September 2005
| null | null | null |
nucl-th
| null |
There now exists a practical method (IP) for the routine inversion of
$S$-matrix elements to produce the corresponding potential. It can be applied
to spin-1/2 and spin-1 projectiles. We survey the ways that IP inversion can be
applied in nuclear physics by inverting $S_{lj}$ derived from theory or from
experiment. The IP inversion method can be extended to invert $S_{lj}(E)$ over
a range of energies to produce a potential $V(r,E) +
\vect{l}\vdot\gvect{\sigma} V_{\rm ls}(r,E)$. It also yields parity-dependent
potentials between pairs of light nuclei and can be convoluted with a direct
search on the $S$-matrix to produce `direct data $\to V$ inversion'. The last
is an economical alternative form of optical model search to fit many
observables (e.g. for polarized deuterons) for many energies, producing an
energy-dependent potential with many parameters (e.g. $T_{\rm R}$ for
deuterons).
|
[{'version': 'v1', 'created': 'Mon, 3 Oct 2005 12:11:47 GMT'}]
|
2007-05-23
|
[array(['Mackintosh', 'R. S.', '',
'The Open University, Milton Keynes, UK'], dtype=object)]
|
2,881 |
1410.2042
|
Shouhua Zhu
|
Shou-hua Zhu (Peking U)
|
A New Paradigm: Role of Electron-positron and Hadron Colliders
|
Invited talk at HF2014, 5 pages
| null | null | null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In 2012, a light scalar boson (denoted as H(125) in this paper) was
discovered at the LHC. We explore the possible correlation between the
lightness of H(125) and the smallness of CP-violation based on the Lee model,
namely the spontaneous CP-violation two-Higgs-doublet-model. It is a new way to
understand why H(125) is light. Based on this we propose that it is the much
heavier scalar bosons, instead of the H(125), which need to be understood. This
opens a new paradigm that one tries to understand the electro-weak symmetry
breaking and CP violation. For the new paradigm, similar to many other physics
beyond the standard model, one need both electron-positron and higher energy
hadron collider, as well as the low energy experiments, in order to pin down
the whole picture.
|
[{'version': 'v1', 'created': 'Wed, 8 Oct 2014 09:55:31 GMT'}]
|
2014-10-09
|
[array(['Zhu', 'Shou-hua', '', 'Peking U'], dtype=object)]
|
2,882 |
1710.05614
|
Claudio Gotti
|
C. Bucci, P. Carniti, L. Cassina, C. Gotti, A. Pelosi, G. Pessina, M.
Turqueti, S. Zimmermann
|
The Faraday room of the CUORE Experiment
| null | null |
10.1088/1748-0221/12/12/P12013
| null |
physics.ins-det
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The paper describes the Faraday room that shields the CUORE experiment
against electromagnetic fields, from 50 Hz up to high frequency. Practical
contraints led to choose panels made of light shielding materials. The seams
between panels were optimized with simulations to minimize leakage.
Measurements of shielding performance show attenuation of a factor 15 at 50 Hz,
and a factor 1000 above 1 KHz up to about 100 MHz.
|
[{'version': 'v1', 'created': 'Mon, 16 Oct 2017 10:48:28 GMT'}]
|
2018-01-17
|
[array(['Bucci', 'C.', ''], dtype=object)
array(['Carniti', 'P.', ''], dtype=object)
array(['Cassina', 'L.', ''], dtype=object)
array(['Gotti', 'C.', ''], dtype=object)
array(['Pelosi', 'A.', ''], dtype=object)
array(['Pessina', 'G.', ''], dtype=object)
array(['Turqueti', 'M.', ''], dtype=object)
array(['Zimmermann', 'S.', ''], dtype=object)]
|
2,883 |
1607.06173
|
Ei Ando
|
Ei Ando and Shuji Kijima
|
An FPTAS for the Volume of a ${\cal V}$-polytope ---It is Hard to
Compute The Volume of The Intersection of Two Cross-polytopes
|
32 pages, 6 figures
| null | null | null |
cs.CC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given an $n$-dimensional convex body by a membership oracle in general, it is
known that any polynomial-time deterministic algorithm cannot approximate its
volume within ratio $(n/\log n)^n$. There is a substantial progress on
randomized approximation such as Markov chain Monte Carlo for a
high-dimensional volume, and for many #P-hard problems, while some
deterministic approximation algorithms are recently developed only for a few
#P-hard problems. Motivated by a deterministic approximation of the volume of a
${\cal V}$-polytope, that is a polytope with few vertices and (possibly)
exponentially many facets, this paper investigates the volume of a "knapsack
dual polytope," which is known to be #P-hard due to Khachiyan (1989). We reduce
an approximate volume of a knapsack dual polytope to that of the intersection
of two cross-polytopes, and give FPTASs for those volume computations.
Interestingly, the volume of the intersection of two cross-polytopes (i.e.,
$L_1$-balls) is #P-hard, unlike the cases of $L_{\infty}$-balls or $L_2$-balls.
|
[{'version': 'v1', 'created': 'Thu, 21 Jul 2016 02:40:30 GMT'}]
|
2016-07-22
|
[array(['Ando', 'Ei', ''], dtype=object)
array(['Kijima', 'Shuji', ''], dtype=object)]
|
2,884 |
astro-ph/9805200
|
Brian P. Schmidt
|
Brian P. Schmidt, Nicholas B. Suntzeff, M. M. Phillips, Robert A.
Schommer, Alejandro Clocchiatti, Robert P. Kirshner, Peter Garnavich, Peter
Challis, B. Leibundgut, J. Spyromilio, Adam G. Riess, Alexei V. Filippenko,
Mario Hamuy, R. Chris Smith, Craig Hogan, Christopher Stubbs, Alan Diercks,
David Reiss, Ron Gilliland, John Tonry, Jose Maza, A. Dressler, J. Walsh, and
R. Ciardullo
|
The High-Z Supernova Search: Measuring Cosmic Deceleration and Global
Cur vature of the Universe Using Type Ia Supernovae
|
51 pages, 14 figures, To Appear in the Astrophysical Journal
|
Astrophys.J. 507 (1998) 46-63
|
10.1086/306308
| null |
astro-ph
| null |
The High-Z Supernova Search is an international collaboration to discover and
monitor type Ia supernovae (SN Ia) at $z > 0.2$ with the aim of measuring
cosmic deceleration and global curvature. Our collaboration has pursued a basic
understanding of supernovae in the nearby Universe, discovering and observing a
large sample of objects, and developing methods to measure accurate distances
with SN Ia. This paper describes the extension of this program to $z \geq 0.2$,
outlining our search techniques and follow-up program. We have devised
high-throughput filters which provide accurate two-color restframe $B$ and $V$
light curves of SN Ia, enabling us to produce precise, extinction-corrected
luminosity distances in the range $0.25 < z < 0.55$. Sources of systematic
error from K-corrections, extinction, selection effects, and evolution are
investigated, and their effects estimated. We present photometric and spectral
observations of SN 1995K, our program's first supernova, and use the data to
obtain a precise measurement of the luminosity distance to the $z=0.479$ host
galaxy. This object, when combined with a nearby sample of SN, yields an
estimate for the matter density of the Universe of $\Omega_M =
-0.2^{+1.0}_{-0.8}$ if $\Omega_\Lambda = 0$. For a spatially flat universe
composed of normal matter and a cosmological constant, we find $\Omega_M =
0.4^{+0.5}_{-0.4}$, $\Omega_\Lambda = 0.6^{+0.4}_{-0.5}$. We demonstrate that
with a sample of $\sim 30$ objects, we should be able to determine relative
luminosity distances over the range $0 < z< 0.5$ with sufficient precision to
measure $\Omega_M$ with an uncertainty of $\pm 0.2$.
|
[{'version': 'v1', 'created': 'Fri, 15 May 1998 02:49:18 GMT'}]
|
2009-10-30
|
[array(['Schmidt', 'Brian P.', ''], dtype=object)
array(['Suntzeff', 'Nicholas B.', ''], dtype=object)
array(['Phillips', 'M. M.', ''], dtype=object)
array(['Schommer', 'Robert A.', ''], dtype=object)
array(['Clocchiatti', 'Alejandro', ''], dtype=object)
array(['Kirshner', 'Robert P.', ''], dtype=object)
array(['Garnavich', 'Peter', ''], dtype=object)
array(['Challis', 'Peter', ''], dtype=object)
array(['Leibundgut', 'B.', ''], dtype=object)
array(['Spyromilio', 'J.', ''], dtype=object)
array(['Riess', 'Adam G.', ''], dtype=object)
array(['Filippenko', 'Alexei V.', ''], dtype=object)
array(['Hamuy', 'Mario', ''], dtype=object)
array(['Smith', 'R. Chris', ''], dtype=object)
array(['Hogan', 'Craig', ''], dtype=object)
array(['Stubbs', 'Christopher', ''], dtype=object)
array(['Diercks', 'Alan', ''], dtype=object)
array(['Reiss', 'David', ''], dtype=object)
array(['Gilliland', 'Ron', ''], dtype=object)
array(['Tonry', 'John', ''], dtype=object)
array(['Maza', 'Jose', ''], dtype=object)
array(['Dressler', 'A.', ''], dtype=object)
array(['Walsh', 'J.', ''], dtype=object)
array(['Ciardullo', 'R.', ''], dtype=object)]
|
2,885 |
1905.08998
|
Mingming Shi
|
Mingming Shi, Claudio De Persis, Pietro Tesi, Nima Monshizadeh
|
Bias estimation in sensor networks
|
12 pages, 8 figures
| null | null | null |
cs.SY math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper investigates the problem of estimating biases affecting relative
state measurements in a sensor network. Each sensor measures the relative
states of its neighbors and this measurement is corrupted by a constant bias.
We analyse under what conditions on the network topology and the maximum number
of biased sensors the biases can be correctly estimated. We show that for
non-bipartite graphs the biases can always be determined even when all the
sensors are corrupted, while for bipartite graphs more than half of the sensors
should be unbiased to ensure the correctness of the bias estimation. If the
biases are heterogeneous, then the number of unbiased sensors can be reduced to
two. Based on these conditions, we propose some algorithms to estimate the
biases.
|
[{'version': 'v1', 'created': 'Wed, 22 May 2019 07:42:17 GMT'}]
|
2019-05-23
|
[array(['Shi', 'Mingming', ''], dtype=object)
array(['De Persis', 'Claudio', ''], dtype=object)
array(['Tesi', 'Pietro', ''], dtype=object)
array(['Monshizadeh', 'Nima', ''], dtype=object)]
|
2,886 |
1811.07643
|
Marco Tulio Valente
|
Hudson Borges, Marco Tulio Valente
|
What's in a GitHub Star? Understanding Repository Starring Practices in
a Social Coding Platform
|
Accepted and published at Journal of Systems and Software, 146:
112-129 (2018)
|
Journal of Systems and Software, pages 112-129, 2018
|
10.1016/j.jss.2018.09.016
| null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Besides a git-based version control system, GitHub integrates several social
coding features. Particularly, GitHub users can star a repository, presumably
to manifest interest or satisfaction with an open source project. However, the
real and practical meaning of starring a project was never the subject of an
in-depth and well-founded empirical investigation. Therefore, we provide in
this paper a throughout study on the meaning, characteristics, and dynamic
growth of GitHub stars. First, by surveying 791 developers, we report that
three out of four developers consider the number of stars before using or
contributing to a GitHub project. Then, we report a quantitative analysis on
the characteristics of the top-5,000 most starred GitHub repositories. We
propose four patterns to describe stars growth, which are derived after
clustering the time series representing the number of stars of the studied
repositories; we also reveal the perception of 115 developers about these
growth patterns. To conclude, we provide a list of recommendations to open
source project managers (e.g., on the importance of social media promotion) and
to GitHub users and Software Engineering researchers (e.g., on the risks faced
when selecting projects by GitHub stars).
|
[{'version': 'v1', 'created': 'Mon, 19 Nov 2018 12:29:14 GMT'}]
|
2019-03-20
|
[array(['Borges', 'Hudson', ''], dtype=object)
array(['Valente', 'Marco Tulio', ''], dtype=object)]
|
2,887 |
2111.04203
|
Simon Murphy
|
Simon J. Murphy, Timothy R. Bedding, Timothy R. White, Yaguang Li,
Daniel Hey, Daniel Reese, Meridith Joyce
|
Five young $\delta$ Scuti stars in the Pleiades seen with Kepler/K2
|
Submitted to MNRAS
| null |
10.1093/mnras/stac240
| null |
astro-ph.SR
|
http://creativecommons.org/licenses/by/4.0/
|
We perform mode identification for five $\delta$ Scuti stars in the Pleiades
star cluster, using custom light curves from K2 photometry. By creating
\'echelle diagrams, we identify radial and dipole mode ridges, comprising a
total of 28 radial and 16 dipole modes across the five stars. We also suggest
possible identities for those modes that lie offset from the radial and dipole
ridges. We calculate non-rotating stellar pulsation models to verify our mode
identifications, finding good agreement within the age and metallicity
constraints of the cluster. We also find that for all stars, the least dense
models are preferred, reflecting the lower density of these oblate, rotating
stars. Three of the five stars show rotationally-split multiplets. We conclude
that the sample shows promise for asteroseismic rotation rates, masses, and
ages with rotating models in the future. Our preliminary modelling also
indicates some sensitivity to the helium abundance.
|
[{'version': 'v1', 'created': 'Sun, 7 Nov 2021 23:23:49 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Jan 2022 01:50:07 GMT'}]
|
2022-02-09
|
[array(['Murphy', 'Simon J.', ''], dtype=object)
array(['Bedding', 'Timothy R.', ''], dtype=object)
array(['White', 'Timothy R.', ''], dtype=object)
array(['Li', 'Yaguang', ''], dtype=object)
array(['Hey', 'Daniel', ''], dtype=object)
array(['Reese', 'Daniel', ''], dtype=object)
array(['Joyce', 'Meridith', ''], dtype=object)]
|
2,888 |
1903.03697
|
Kiril Solovey
|
Kiril Solovey and Mauro Salazar and Marco Pavone
|
Scalable and Congestion-aware Routing for Autonomous Mobility-on-Demand
via Frank-Wolfe Optimization
| null | null | null | null |
math.OC cs.DS cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the problem of vehicle routing for Autonomous Mobility-on-Demand
(AMoD) systems, wherein a fleet of self-driving vehicles provides on-demand
mobility in a given environment. Specifically, the task it to compute routes
for the vehicles (both customer-carrying and empty travelling) so that travel
demand is fulfilled and operational cost is minimized. The routing process must
account for congestion effects affecting travel times, as modeled via a
volume-delay function (VDF). Route planning with VDF constraints is notoriously
challenging, as such constraints compound the combinatorial complexity of the
routing optimization process. Thus, current solutions for AMoD routing resort
to relaxations of the congestion constraints, thereby trading optimality with
computational efficiency. In this paper, we present the first
computationally-efficient approach for AMoD routing where VDF constraints are
explicitly accounted for. We demonstrate that our approach is faster by at
least one order of magnitude with respect to the state of the art, while
providing higher quality solutions. From a methodological standpoint, the key
technical insight is to establish a mathematical reduction of the AMoD routing
problem to the classical traffic assignment problem (a related vehicle-routing
problem where empty traveling vehicles are not present). Such a reduction
allows us to extend powerful algorithmic tools for traffic assignment, which
combine the classic Frank-Wolfe algorithm with modern techniques for
pathfinding, to the AMoD routing problem. We provide strong theoretical
guarantees for our approach in terms of near-optimality of the returned
solution.
|
[{'version': 'v1', 'created': 'Fri, 8 Mar 2019 23:26:46 GMT'}]
|
2019-03-12
|
[array(['Solovey', 'Kiril', ''], dtype=object)
array(['Salazar', 'Mauro', ''], dtype=object)
array(['Pavone', 'Marco', ''], dtype=object)]
|
2,889 |
2211.08978
|
Michael Witbrock
|
Michael Witbrock and Patrick Haffner
|
Rapid Connectionist Speaker Adaptation
|
6 Figures, Two Tables, ICASSP-92
|
ICASSP-92: 1992 IEEE International Conference on Acoustics,
Speech, and Signal Processing, 1992, pp. 453-456 vol.1
|
10.1109/ICASSP.1992.225874
| null |
cs.SD cs.AI eess.AS
|
http://creativecommons.org/licenses/by/4.0/
|
We present SVCnet, a system for modelling speaker variability. Encoder Neural
Networks specialized for each speech sound produce low dimensionality models of
acoustical variation, and these models are further combined into an overall
model of voice variability. A training procedure is described which minimizes
the dependence of this model on which sounds have been uttered. Using the
trained model (SVCnet) and a brief, unconstrained sample of a new speaker's
voice, the system produces a Speaker Voice Code that can be used to adapt a
recognition system to the new speaker without retraining. A system which
combines SVCnet with an MS-TDNN recognizer is described
|
[{'version': 'v1', 'created': 'Tue, 15 Nov 2022 00:15:11 GMT'}]
|
2022-11-17
|
[array(['Witbrock', 'Michael', ''], dtype=object)
array(['Haffner', 'Patrick', ''], dtype=object)]
|
2,890 |
1804.02903
|
Felix Pauck
|
Felix Pauck, Eric Bodden, Heike Wehrheim
|
Do Android Taint Analysis Tools Keep Their Promises?
| null | null |
10.1145/3236024.3236029
| null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In recent years, researchers have developed a number of tools to conduct
taint analysis of Android applications. While all the respective papers aim at
providing a thorough empirical evaluation, comparability is hindered by varying
or unclear evaluation targets. Sometimes, the apps used for evaluation are not
precisely described. In other cases, authors use an established benchmark but
cover it only partially. In yet other cases, the evaluations differ in terms of
the data leaks searched for, or lack a ground truth to compare against. All
those limitations make it impossible to truly compare the tools based on those
published evaluations.
We thus present ReproDroid, a framework allowing the accurate comparison of
Android taint analysis tools. ReproDroid supports researchers in inferring the
ground truth for data leaks in apps, in automatically applying tools to
benchmarks, and in evaluating the obtained results. We use ReproDroid to
comparatively evaluate on equal grounds the six prominent taint analysis tools
Amandroid, DIALDroid, DidFail, DroidSafe, FlowDroid and IccTA. The results are
largely positive although four tools violate some promises concerning features
and accuracy. Finally, we contribute to the area of unbiased benchmarking with
a new and improved version of the open test suite DroidBench.
|
[{'version': 'v1', 'created': 'Mon, 9 Apr 2018 10:44:36 GMT'}
{'version': 'v2', 'created': 'Tue, 30 Jul 2019 06:01:45 GMT'}]
|
2019-07-31
|
[array(['Pauck', 'Felix', ''], dtype=object)
array(['Bodden', 'Eric', ''], dtype=object)
array(['Wehrheim', 'Heike', ''], dtype=object)]
|
2,891 |
2103.09177
|
Alexander Rakhlin
|
Peter L. Bartlett and Andrea Montanari and Alexander Rakhlin
|
Deep learning: a statistical viewpoint
| null | null | null | null |
math.ST cs.LG stat.ML stat.TH
|
http://creativecommons.org/licenses/by/4.0/
|
The remarkable practical success of deep learning has revealed some major
surprises from a theoretical perspective. In particular, simple gradient
methods easily find near-optimal solutions to non-convex optimization problems,
and despite giving a near-perfect fit to training data without any explicit
effort to control model complexity, these methods exhibit excellent predictive
accuracy. We conjecture that specific principles underlie these phenomena: that
overparametrization allows gradient methods to find interpolating solutions,
that these methods implicitly impose regularization, and that
overparametrization leads to benign overfitting. We survey recent theoretical
progress that provides examples illustrating these principles in simpler
settings. We first review classical uniform convergence results and why they
fall short of explaining aspects of the behavior of deep learning methods. We
give examples of implicit regularization in simple settings, where gradient
methods lead to minimal norm functions that perfectly fit the training data.
Then we review prediction methods that exhibit benign overfitting, focusing on
regression problems with quadratic loss. For these methods, we can decompose
the prediction rule into a simple component that is useful for prediction and a
spiky component that is useful for overfitting but, in a favorable setting,
does not harm prediction accuracy. We focus specifically on the linear regime
for neural networks, where the network can be approximated by a linear model.
In this regime, we demonstrate the success of gradient flow, and we consider
benign overfitting with two-layer networks, giving an exact asymptotic analysis
that precisely demonstrates the impact of overparametrization. We conclude by
highlighting the key challenges that arise in extending these insights to
realistic deep learning settings.
|
[{'version': 'v1', 'created': 'Tue, 16 Mar 2021 16:26:36 GMT'}]
|
2021-03-17
|
[array(['Bartlett', 'Peter L.', ''], dtype=object)
array(['Montanari', 'Andrea', ''], dtype=object)
array(['Rakhlin', 'Alexander', ''], dtype=object)]
|
2,892 |
1903.12253
|
Amit Mishra
|
Amit Mishra, Pranath Reddy, Rahul Nigam
|
Baryon density extraction and isotropy analysis of Cosmic Microwave
Background using Deep Learning
|
6 pages, cosmic microwave background radiation, deep learning, neural
networks
| null |
10.1088/2632-2153/abab63
| null |
astro-ph.CO
|
http://creativecommons.org/licenses/by/4.0/
|
The discovery of cosmic microwave background (CMB) was a paradigm shift in
the study and fundamental understanding of the early universe and also the Big
Bang phenomenon. Cosmic microwave background is one of the richest and
intriguing sources of information available to cosmologists and one parameter
of special interest is baryon density of the universe. Baryon density can be
primarily estimated by analyzing CMB data or through the study of big bang
nucleosynthesis(BBN). Hence, it is necessary that both of the results found
though the two methods are in agreement with each other. Although there are
some well established statistical methods for the analysis of CMB to estimate
baryon density, here we explore the use of deep learning in this respect. We
correlate the baryon density obtained from the power spectrum of simulated CMB
temperature maps with the corresponding map image and form the dataset for
training the neural network model. We analyze the accuracy with which the model
is able to predict the results from a relatively abstract dataset considering
the fact that CMB is a Gaussian random field. CMB is anisotropic due to
temperature fluctuations at small scales but on a larger scale CMB is
considered isotropic, here we analyze the isotropy of CMB by training the model
with CMB maps centered at different galactic coordinates and compare the
predictions of neural network models.
|
[{'version': 'v1', 'created': 'Thu, 28 Mar 2019 20:35:35 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Aug 2019 08:50:14 GMT'}
{'version': 'v3', 'created': 'Wed, 27 Nov 2019 12:34:42 GMT'}
{'version': 'v4', 'created': 'Sat, 8 Aug 2020 17:22:45 GMT'}]
|
2020-08-11
|
[array(['Mishra', 'Amit', ''], dtype=object)
array(['Reddy', 'Pranath', ''], dtype=object)
array(['Nigam', 'Rahul', ''], dtype=object)]
|
2,893 |
1705.03193
|
Orestis Kostakis
|
Kiran Garimella, Orestis Kostakis, Michael Mathioudakis
|
Ad-blocking: A Study on Performance, Privacy and Counter-measures
|
9th International ACM Web Science Conference, 2017
| null | null | null |
cs.SI cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Many internet ventures rely on advertising for their revenue. However, users
feel discontent by the presence of ads on the websites they visit, as the
data-size of ads is often comparable to that of the actual content. This has an
impact not only on the loading time of webpages, but also on the internet bill
of the user in some cases. In absence of a mutually-agreed procedure for opting
out of advertisements, many users resort to ad-blocking browser-extensions. In
this work, we study the performance of popular ad-blockers on a large set of
news websites. Moreover, we investigate the benefits of ad-blockers on user
privacy as well as the mechanisms used by websites to counter them. Finally, we
explore the traffic overhead due to the ad-blockers themselves.
|
[{'version': 'v1', 'created': 'Tue, 9 May 2017 06:11:30 GMT'}]
|
2017-05-10
|
[array(['Garimella', 'Kiran', ''], dtype=object)
array(['Kostakis', 'Orestis', ''], dtype=object)
array(['Mathioudakis', 'Michael', ''], dtype=object)]
|
2,894 |
1612.09041
|
Maddali Vivekanand
|
M. Vivekanand
|
A non-glitch speed-up event in the Crab Pulsar
|
Accepted for publication as a Letter in Astronomy and Astrophysics
|
A&A 597, L9 (2017)
|
10.1051/0004-6361/201630235
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Context: The rotation history of the Crab Pulsar is well described by (1) a
rotation frequency $\nu$ and a slowdown model that is specified by its first
two time derivatives $\dot \nu$ and $\ddot \nu$, known as the secular slowdown
model, (2) occasional (once in $\approx 2$ years) significant and abrupt
increases in the magnitude of $\nu$ and $\dot \nu$ (occurring on timescales of
minutes), known as glitches, and (3) much slower increases and decreases in
$\nu$ and $\dot \nu$ (occurring over months and years) that are an order of
magnitude smaller, known as timing noise.
Aims: This work reports a speed-up event in the Crab Pulsar that occurred
around $2015$ February that is distinct from glitches and timing noise.
Methods: Monthly $\nu$s and $\dot \nu$s of the Crab Pulsar, obtained at radio
frequencies and published by Jodrell Bank Observatory (JBO), are used to
demonstrate the speed-up event. Monthly arrival times of the Crab Pulsar's
pulse, also published by JBO, combined with X-ray data from the RXTE, SWIFT,
and NUSTAR observatories are used to verify the result.
Results: The speed-up event is caused by a persistent increase in $\dot \nu$,
which results in a monotonic increase in $\nu$. Over the last $\approx 550$
days, $\nu$ has increased monotonically by an amount that is $\approx 10$ times
larger than the timing noise level.
Conclusions: This is a unique event in the Crab Pulsar. This is probably due
to a small increase in the Crab Pulsar's internal temperature. In its absence,
the next large glitch in the Crab Pulsar is expected to occur around $2019$
March. However, this event could have an important bearing on its occurrence.
|
[{'version': 'v1', 'created': 'Thu, 29 Dec 2016 05:35:49 GMT'}]
|
2017-01-17
|
[array(['Vivekanand', 'M.', ''], dtype=object)]
|
2,895 |
1412.8103
|
Natarajan Meghanathan
|
Natarajan Meghanathan and Leslie C. Milton
|
A Simulation Based Performance Comparison Study of Stability-Based
Routing, Power-Aware Routing and Load-Balancing On-Demand Routing Protocols
for Mobile Ad hoc Networks
|
8 pages, 12 figures. arXiv admin note: substantial text overlap with
arXiv:1007.0409
| null | null | null |
cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The high-level contribution of this paper is a simulation-based detailed
performance comparison of three different classes of on-demand routing
protocols for mobile ad hoc networks: stability-based routing, power-aware
routing and load-balanced routing. We choose the Flow-Oriented Routing protocol
(FORP), Min-Max Battery Cost Routing (MMBCR) and the traffic interference based
Load Balancing Routing (LBR) protocol as representatives of the stability-based
routing, poweraware routing and load-balancing routing protocols respectively.
FORP incurs the least number of route transitions; while LBR incurs the
smallest hop count and lowest end-to-end delay per data packet. Energy consumed
per data packet is the least for LBR, closely followed by MMBCR. FORP incurs
the maximum energy consumed per data packet, both in the absence and presence
of power control. Nevertheless, in the presence of power control, the
end-to-end delay per data packet and energy consumed per data packet incurred
by FORP are significantly reduced compared to the scenario without power
control. MMBCR is the most fair in terms of node usage and incurs the largest
time for first node failure. FORP tends to repeatedly use nodes lying on the
stable path and hence is the most unfair of the three routing protocols. FORP
also incurs the smallest value for the time of first node failure.
|
[{'version': 'v1', 'created': 'Fri, 5 Dec 2014 21:56:56 GMT'}]
|
2014-12-30
|
[array(['Meghanathan', 'Natarajan', ''], dtype=object)
array(['Milton', 'Leslie C.', ''], dtype=object)]
|
2,896 |
1412.1610
|
Jeremie Bettinelli
|
C\'eline Abraham (LM-Orsay), J\'er\'emie Bettinelli (IECL), Gwendal
Collet (LIX), Igor Kortchemski (DMA)
|
Random maps: proceeding of the Journ{\'e}es MAS 2014
|
arXiv admin note: text overlap with arXiv:1307.6818
| null | null | null |
math.PR math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is a quick survey on some recent works done in the field of random maps.
|
[{'version': 'v1', 'created': 'Thu, 4 Dec 2014 10:37:23 GMT'}]
|
2014-12-05
|
[array(['Abraham', 'Céline', '', 'LM-Orsay'], dtype=object)
array(['Bettinelli', 'Jérémie', '', 'IECL'], dtype=object)
array(['Collet', 'Gwendal', '', 'LIX'], dtype=object)
array(['Kortchemski', 'Igor', '', 'DMA'], dtype=object)]
|
2,897 |
1512.07158
|
Baichuan Zhang
|
Baichuan Zhang, Noman Mohammed, Vachik Dave, Mohammad Al Hasan
|
Feature Selection for Classification under Anonymity Constraint
|
Transactions on Data Privacy 2017
| null | null | null |
cs.LG cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Over the last decade, proliferation of various online platforms and their
increasing adoption by billions of users have heightened the privacy risk of a
user enormously. In fact, security researchers have shown that sparse microdata
containing information about online activities of a user although anonymous,
can still be used to disclose the identity of the user by cross-referencing the
data with other data sources. To preserve the privacy of a user, in existing
works several methods (k-anonymity, l-diversity, differential privacy) are
proposed that ensure a dataset which is meant to share or publish bears small
identity disclosure risk. However, the majority of these methods modify the
data in isolation, without considering their utility in subsequent knowledge
discovery tasks, which makes these datasets less informative. In this work, we
consider labeled data that are generally used for classification, and propose
two methods for feature selection considering two goals: first, on the reduced
feature set the data has small disclosure risk, and second, the utility of the
data is preserved for performing a classification task. Experimental results on
various real-world datasets show that the method is effective and useful in
practice.
|
[{'version': 'v1', 'created': 'Tue, 22 Dec 2015 17:06:01 GMT'}
{'version': 'v2', 'created': 'Sat, 13 Feb 2016 03:05:36 GMT'}
{'version': 'v3', 'created': 'Fri, 19 Feb 2016 02:01:57 GMT'}
{'version': 'v4', 'created': 'Thu, 17 Mar 2016 02:30:33 GMT'}
{'version': 'v5', 'created': 'Thu, 1 Dec 2016 01:05:59 GMT'}
{'version': 'v6', 'created': 'Tue, 31 Jan 2017 15:47:47 GMT'}
{'version': 'v7', 'created': 'Mon, 6 Feb 2017 01:14:37 GMT'}]
|
2017-02-07
|
[array(['Zhang', 'Baichuan', ''], dtype=object)
array(['Mohammed', 'Noman', ''], dtype=object)
array(['Dave', 'Vachik', ''], dtype=object)
array(['Hasan', 'Mohammad Al', ''], dtype=object)]
|
2,898 |
1410.1001
|
Matthias Strauch
|
Deepam Patel, Tobias Schmidt, Matthias Strauch
|
Arithmetic differential operators on a semistable model of ${\mathbb
P}^1$
|
Added acknowledgement of support by the ANR program p-adic Hodge
Theory and beyond (Th\'eHopaD)
| null | null | null |
math.RT math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we study sheaves of logarithmic arithmetic differential
operators on a particular semistable model of the projective line. The main
result here is that the first cohomology group of these sheaves is non-torsion.
We also consider a refinement of the order filtration on the sheaf of level
zero (before taking the p-adic completion). The associated graded sheaf, which
we explicitly determine, explains to some extent the occurrence of the
cohomology classes in degree one.
|
[{'version': 'v1', 'created': 'Sat, 4 Oct 2014 00:24:00 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Oct 2014 17:40:25 GMT'}]
|
2014-10-08
|
[array(['Patel', 'Deepam', ''], dtype=object)
array(['Schmidt', 'Tobias', ''], dtype=object)
array(['Strauch', 'Matthias', ''], dtype=object)]
|
2,899 |
1709.05394
|
William La Cava
|
William La Cava, Thomas Helmuth, Lee Spector, Jason H. Moore
|
A probabilistic and multi-objective analysis of lexicase selection and
epsilon-lexicase selection
|
30 pages, 8 figures. To appear in Evolutionary Computation Journal
| null | null | null |
cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lexicase selection is a parent selection method that considers training cases
individually, rather than in aggregate, when performing parent selection.
Whereas previous work has demonstrated the ability of lexicase selection to
solve difficult problems in program synthesis and symbolic regression, the
central goal of this paper is to develop the theoretical underpinnings that
explain its performance. To this end, we derive an analytical formula that
gives the expected probabilities of selection under lexicase selection, given a
population and its behavior. In addition, we expand upon the relation of
lexicase selection to many-objective optimization methods to describe the
behavior of lexicase selection, which is to select individuals on the
boundaries of Pareto fronts in high-dimensional space. We show analytically why
lexicase selection performs more poorly for certain sizes of population and
training cases, and show why it has been shown to perform more poorly in
continuous error spaces. To address this last concern, we propose new variants
of epsilon-lexicase selection, a method that modifies the pass condition in
lexicase selection to allow near-elite individuals to pass cases, thereby
improving selection performance with continuous errors. We show that
epsilon-lexicase outperforms several diversity-maintenance strategies on a
number of real-world and synthetic regression problems.
|
[{'version': 'v1', 'created': 'Fri, 15 Sep 2017 20:38:38 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Nov 2017 21:45:50 GMT'}
{'version': 'v3', 'created': 'Sun, 29 Apr 2018 23:46:48 GMT'}]
|
2018-05-01
|
[array(['La Cava', 'William', ''], dtype=object)
array(['Helmuth', 'Thomas', ''], dtype=object)
array(['Spector', 'Lee', ''], dtype=object)
array(['Moore', 'Jason H.', ''], dtype=object)]
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.