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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3,500 |
2105.02903
|
Eric Linder
|
Eric V. Linder
|
What is the Standard Cosmological Model?
|
8 pages, 5 figures, based on colloquium "All Cosmology, All The Time"
| null | null | null |
astro-ph.CO
|
http://creativecommons.org/licenses/by/4.0/
|
Reports of "cosmology in crisis" are in vogue, but as Mark Twain said, "the
report of my death was an exaggeration". We explore what we might actually mean
by the standard cosmological model, how tensions - or their apparent
resolutions - might arise from too narrow a view, and why looking at the big
picture is so essential. This is based on the seminar "All Cosmology, All the
Time".
|
[{'version': 'v1', 'created': 'Thu, 6 May 2021 18:09:45 GMT'}]
|
2021-05-10
|
[array(['Linder', 'Eric V.', ''], dtype=object)]
|
3,501 |
2007.06576
|
Imad Pasha
|
Imad Pasha, Joel Leja, Pieter G. van Dokkum, Charlie Conroy, Benjamin
D. Johnson
|
Brackett-$\gamma$ as a Gold-standard Test of Star Formation Rates
Derived from SED Fitting
|
18 pages, 9 figures, 2 tables. Version accepted in ApJ
| null |
10.3847/1538-4357/aba0b1
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by/4.0/
|
Using a local reference sample of 21 galaxies, we compare observations of the
$\lambda$2.16 $\mu$m Brackett-$\gamma$ (Br$\gamma$) hydrogen recombination line
with predictions from the Prospector Bayesian inference framework, which was
used to fit the broadband photometry of these systems. This is a clean test of
the spectral-energy-distribution-derived star formation rates (SFRs), as dust
is expected to be optically thin at this wavelength in nearly all galaxies;
thus, the internal conversion of SFR to predicted line luminosity does not
depend strongly on the adopted dust model and posterior dust parameters, as is
the case for shorter-wavelength lines such as H$\alpha$. We find that
Prospector predicts Br$\gamma$ luminosities and equivalent widths with small
offsets ($\sim$0.05 dex), and scatter ($\sim$0.2 dex), consistent with
measurement uncertainties, though we caution that the derived offset is
dependent on the choice of stellar isochrones. We demonstrate that even when
the Prospector-derived dust attenuation does not well describe, e.g., H$\alpha$
line properties or observed reddening between H$\alpha$ and Br$\gamma$, the
underlying SFRs are accurate, as verified by the dust-free Br$\gamma$
comparison. Finally, we discuss in what ways Br$\gamma$ might be able to help
constrain model parameters when treated as an input to the model, and comment
on its potential as an accurate monochromatic SFR indicator in the era of JWST
multiobject near-IR spectroscopy.
|
[{'version': 'v1', 'created': 'Mon, 13 Jul 2020 18:00:01 GMT'}]
|
2020-08-12
|
[array(['Pasha', 'Imad', ''], dtype=object)
array(['Leja', 'Joel', ''], dtype=object)
array(['van Dokkum', 'Pieter G.', ''], dtype=object)
array(['Conroy', 'Charlie', ''], dtype=object)
array(['Johnson', 'Benjamin D.', ''], dtype=object)]
|
3,502 |
2010.16192
|
Rodolfo Id Betan Dr.
|
S. Affranchino and R.M. Id Betan
|
Neutron-pair structure in the continuum spectrum of $^{26}$O
|
7 pages, 5 figures, 5 tables, 47 references
|
Phys. Rev. C 102, 044330 (2020)
|
10.1103/PhysRevC.102.044330
| null |
nucl-th nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The structure of $^{26}$O is currently being investigated on both theoretical
and experimental fronts. It is well established that it is unbound and the
resonance parameters are fairly well-known. The theoretical analysis may
involved two- and three-body interactions, as well as correlations with the
continuum spectrum of energy. In order to properly assess the structure of the
ground and excited states, it is imperative to include a large single particle
representation with the right asymptotic behavior. The purpose of this work is
to provide details of the single particle continuum configurations of the
ground and excited $0^+$ states. We use a large complex energy single particle
basis, formed by resonances and complex energy scattering states, the so called
Berggren basis, and a separable interaction, which is convenient to solve in a
large model space. Three $0^+$ states were found in the complex energy plane.
Changes of the resonant parameters, i.e. energy and width, were analyzed as a
function of strength of the residual interaction. It is shown how a subtle
difference in the interaction could change the unbound character of $^{26}$O
into a Borromean nucleus. Only one of the two excited states can be considered
as a candidate for a physical meaningful resonance. The calculated occupation
probabilities are in agreement with other theoretical approaches although the
calculated half live is three-order of magnitude smaller than the experimental
one.
|
[{'version': 'v1', 'created': 'Fri, 30 Oct 2020 11:05:17 GMT'}]
|
2020-11-02
|
[array(['Affranchino', 'S.', ''], dtype=object)
array(['Betan', 'R. M. Id', ''], dtype=object)]
|
3,503 |
cond-mat/9701204
|
Mark van Rossum
|
M. C. W. van Rossum, Igor V. Lerner, Boris L. Altshuler, Th. M.
Nieuwenhuizen
|
Deviations from the Gaussian distribution of mesoscopic conductance
fluctuations
|
9 pages, Revtex, with eps figures,to appear in Phys Rev B
| null |
10.1103/PhysRevB.55.4710
| null |
cond-mat.mes-hall
| null |
The conductance distribution of metallic mesoscopic systems is considered.
The variance of this distribution describes the universal conductance
fluctuations, yielding a Gaussian distribution of the conductance. We calculate
diagrammatically the third cumulant of this distribution, the leading deviation
from the Gaussian. We confirm random matrix theory calculations that the
leading contribution in quasi-one dimension vanishes. However, in quasi two
dimensions the third cumulant is negative, whereas in three dimensions it is
positive.
|
[{'version': 'v1', 'created': 'Tue, 28 Jan 1997 20:29:25 GMT'}]
|
2009-10-30
|
[array(['van Rossum', 'M. C. W.', ''], dtype=object)
array(['Lerner', 'Igor V.', ''], dtype=object)
array(['Altshuler', 'Boris L.', ''], dtype=object)
array(['Nieuwenhuizen', 'Th. M.', ''], dtype=object)]
|
3,504 |
1210.1088
|
Kil-Chan Ha
|
Kil-Chan Ha and Seung-Hyeok Kye
|
Separable states with unique decompositions
|
26 pages, 1 figure. A part on SPA conjecture is withdrawn
|
Communications in Mathematical Physics, Volume 328, Issue 1, pp
131-153 (2014)
|
10.1007/s00220-014-1980-6
| null |
quant-ph math.OA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We search for faces of the convex set consisting of all separable states,
which are affinely isomorphic to simplices, to get separable states with unique
decompositions. In the two-qutrit case, we found that six product vectors
spanning a five dimensional space give rise to a face isomorphic to the
5-dimensional simplex with six vertices, under suitable linear independence
assumption.
If the partial conjugates of six product vectors also span a 5-dimensional
space, then this face is inscribed in the face for PPT states whose boundary
shares the fifteen 3-simplices on the boundary of the 5-simplex. The remaining
boundary points consist of PPT entangled edge states of rank four. We also show
that every edge state of rank four arises in this way. If the partial
conjugates of the above six product vectors span a 6-dimensional space then we
have a face isomorphic to 5-simplex, whose interior consists of separable
states with unique decompositions, but with non-symmetric ranks. We also
construct a face isomorphic to the 9-simplex. As applications, we give answers
to questions in the literature \cite{chen_dj_semialg,chen_dj_ext_PPT}, and
construct $3\ot 3$ PPT states of type (9,5). For the qubit-qudit cases with
$d\ge 3$, we also show that $(d+1)$-dimensional subspaces give rise to faces
isomorphic to the $d$-simplices, in most cases.
|
[{'version': 'v1', 'created': 'Wed, 3 Oct 2012 12:38:49 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Oct 2012 01:20:23 GMT'}
{'version': 'v3', 'created': 'Mon, 29 Oct 2012 10:58:50 GMT'}
{'version': 'v4', 'created': 'Mon, 15 Apr 2013 04:17:50 GMT'}
{'version': 'v5', 'created': 'Thu, 11 Jul 2013 13:22:38 GMT'}]
|
2014-07-22
|
[array(['Ha', 'Kil-Chan', ''], dtype=object)
array(['Kye', 'Seung-Hyeok', ''], dtype=object)]
|
3,505 |
2102.10739
|
Yifei Wang
|
Yifei Wang, Yisen Wang, Jiansheng Yang, Zhouchen Lin
|
Dissecting the Diffusion Process in Linear Graph Convolutional Networks
|
NeurIPS 2021. Code is available at https://github.com/yifeiwang77/DGC
| null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Graph Convolutional Networks (GCNs) have attracted more and more attentions
in recent years. A typical GCN layer consists of a linear feature propagation
step and a nonlinear transformation step. Recent works show that a linear GCN
can achieve comparable performance to the original non-linear GCN while being
much more computationally efficient. In this paper, we dissect the feature
propagation steps of linear GCNs from a perspective of continuous graph
diffusion, and analyze why linear GCNs fail to benefit from more propagation
steps. Following that, we propose Decoupled Graph Convolution (DGC) that
decouples the terminal time and the feature propagation steps, making it more
flexible and capable of exploiting a very large number of feature propagation
steps. Experiments demonstrate that our proposed DGC improves linear GCNs by a
large margin and makes them competitive with many modern variants of non-linear
GCNs.
|
[{'version': 'v1', 'created': 'Mon, 22 Feb 2021 02:45:59 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Oct 2021 17:54:20 GMT'}]
|
2021-10-29
|
[array(['Wang', 'Yifei', ''], dtype=object)
array(['Wang', 'Yisen', ''], dtype=object)
array(['Yang', 'Jiansheng', ''], dtype=object)
array(['Lin', 'Zhouchen', ''], dtype=object)]
|
3,506 |
1001.3654
|
Akbar Tayebi
|
Akbar Tayebi and Esmaeil Peyghan
|
On Special Berwald Metrics
| null |
SIGMA 6 (2010), 008, 9 pages
|
10.3842/SIGMA.2010.008
| null |
math.DG
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
In this paper, we study a class of Finsler metrics which contains the class
of Berwald metrics as a special case. We prove that every Finsler metric in
this class is a generalized Douglas-Weyl metric. Then we study isotropic flag
curvature Finsler metrics in this class. Finally we show that on this class of
Finsler metrics, the notion of Landsberg and weakly Landsberg curvature are
equivalent.
|
[{'version': 'v1', 'created': 'Wed, 20 Jan 2010 19:10:32 GMT'}]
|
2010-01-21
|
[array(['Tayebi', 'Akbar', ''], dtype=object)
array(['Peyghan', 'Esmaeil', ''], dtype=object)]
|
3,507 |
1108.4049
|
Leonard S. Kisslinger
|
Leonard S. Kisslinger, Ming X. Liu Patrick McGaughey
|
Heavy Quark State Production In p-p Collisions
|
15 pages, 10 figures
|
Phys. Rev. D84, 114020 (2011)
|
10.1103/PhysRevD.84.114020
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We estimate the relative probabilities of $\Psi'(2S)$ to $J/\Psi$ production
at BNL-RHIC and $\Upsilon(nS)$ production at the LHC and Fermilab in p-p
collisions, using our recent theory of mixed heavy quark hybrids, in which the
$\Psi'(2S)$ and $\Upsilon(3S)$ mesons have approximately equal normal
$q\bar{q}$ and hybrid $q\bar{q}g$ components.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 2011 20:54:36 GMT'}
{'version': 'v2', 'created': 'Fri, 20 Jul 2012 17:23:37 GMT'}]
|
2015-05-30
|
[array(['Kisslinger', 'Leonard S.', ''], dtype=object)
array(['McGaughey', 'Ming X. Liu Patrick', ''], dtype=object)]
|
3,508 |
1812.09931
|
Xiu-Lei Ren
|
Xiu-Lei Ren, Zhi-Feng Sun
|
Possible bound states with hidden bottom from
$\bar{K}^{(*)}B^{(*)}\bar{B}^{(*)}$ systems
|
Version to be published in Phys. Rev. D
|
Phys. Rev. D 99, 094041 (2019)
|
10.1103/PhysRevD.99.094041
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the three-body systems of $\bar{K}^{(*)}B^{(*)}\bar{B}^{(*)}$ by
solving the Faddeev equations in the fixed-center approximation, where the
light particle $\bar{K}^{(*)}$ interacts with the heavy bound states of
$B\bar{B}$ ($B^*\bar{B}^*$) forming the clusters. In terms of the very
attractive $\bar{K}^*B$ and $\bar{K}^*B^*$ subsystems, which are constrained by
the observed $B_{s1}(5830)$ and $B_{s2}^*(5840)$ states in experiment, we find
two deep bound states, containing the hidden-bottom components, with masses
$11002\pm 63$ MeV and $11078\pm 57$ MeV in the $\bar{K}^*B\bar{B}$ and
$\bar{K}^*B^*\bar{B}^*$ systems, respectively. The two corresponding states
with higher masses of the above systems are also predicted. In addition, using
the constrained two-body amplitudes of $\bar{K}B^{(*)}$ and
$\bar{K}\bar{B}^{(*)}$ via the hidden gauge symmetry in the heavy-quark sector,
we also find two three-body $\bar{K}B\bar{B}$ and $\bar{K}B^{*}\bar{B}^*$ bound
states.
|
[{'version': 'v1', 'created': 'Mon, 24 Dec 2018 14:52:45 GMT'}
{'version': 'v2', 'created': 'Mon, 27 May 2019 07:47:07 GMT'}]
|
2019-06-05
|
[array(['Ren', 'Xiu-Lei', ''], dtype=object)
array(['Sun', 'Zhi-Feng', ''], dtype=object)]
|
3,509 |
1503.01924
|
Wei-Zhou Jiang
|
Qi-Lin Zhang, Rong-Yao Yang, Wei-Zhou Jiang, Zi-Qian Huang
|
Fast Water Channeling across Carbon Nanotubes in Far Infrared Terahertz
Electric Fields
|
to appear in Nanoscalse (2016)
| null |
10.1039/c5nr07281f
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using molecular dynamics simulations, we investigate systematically the water
permeation properties across the single-walled carbon nanotube (SWCNT) in the
presence of the terahertz electric field (TEF). With the TEF normal to the
nanotube, the fracture of the hydrogen bonds results in the giant peak of net
fluxes across the SWCNT with a three-fold enhancement centered around 14THz.
The phenomenon is attributed to the resonant mechanisms, characterized by
librational, rotational, and rotation-induced responses of in-tube polar water
molecules to the TEF. For the TEF along the symmetry axis of the nanotube, the
vortical modes for resonances and consequently the enhancement of net fluxes
are greatly suppressed by the alignment of polar water along the symmetry axis,
which characterizes the quasi one-dimensional feature of the SWCNT nicely. The
resonances of water molecules in the TEF can have potential applications in the
high-flux device designs used for various purposes.
|
[{'version': 'v1', 'created': 'Fri, 6 Mar 2015 11:39:28 GMT'}
{'version': 'v2', 'created': 'Sat, 18 Apr 2015 06:07:30 GMT'}
{'version': 'v3', 'created': 'Tue, 29 Dec 2015 15:37:29 GMT'}]
|
2016-02-17
|
[array(['Zhang', 'Qi-Lin', ''], dtype=object)
array(['Yang', 'Rong-Yao', ''], dtype=object)
array(['Jiang', 'Wei-Zhou', ''], dtype=object)
array(['Huang', 'Zi-Qian', ''], dtype=object)]
|
3,510 |
1404.6696
|
Thibaut Vidal
|
Thibaut Vidal, Maria Battarra, Anand Subramanian, G\"une\c{s}
Erdo\v{g}an
|
Hybrid Metaheuristics for the Clustered Vehicle Routing Problem
|
Working Paper, MIT -- 22 pages
| null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Clustered Vehicle Routing Problem (CluVRP) is a variant of the
Capacitated Vehicle Routing Problem in which customers are grouped into
clusters. Each cluster has to be visited once, and a vehicle entering a cluster
cannot leave it until all customers have been visited. This article presents
two alternative hybrid metaheuristic algorithms for the CluVRP. The first
algorithm is based on an Iterated Local Search algorithm, in which only
feasible solutions are explored and problem-specific local search moves are
utilized. The second algorithm is a Hybrid Genetic Search, for which the
shortest Hamiltonian path between each pair of vertices within each cluster
should be precomputed. Using this information, a sequence of clusters can be
used as a solution representation and large neighborhoods can be efficiently
explored by means of bi-directional dynamic programming, sequence
concatenations, by using appropriate data structures. Extensive computational
experiments are performed on benchmark instances from the literature, as well
as new large scale ones. Recommendations on promising algorithm choices are
provided relatively to average cluster size.
|
[{'version': 'v1', 'created': 'Sat, 26 Apr 2014 23:52:47 GMT'}]
|
2014-04-29
|
[array(['Vidal', 'Thibaut', ''], dtype=object)
array(['Battarra', 'Maria', ''], dtype=object)
array(['Subramanian', 'Anand', ''], dtype=object)
array(['Erdoǧan', 'Güneş', ''], dtype=object)]
|
3,511 |
1908.10434
|
Carlos Grossi
|
Felipe A. Franco, Carlos H. Grossi
|
Special elliptic isometries, relative SU(2,1)-character varieties, and
bendings
|
31 pages, 11 figures
| null |
10.1007/s12220-020-00512-0
| null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study relations between special elliptic isometries in the complex
hyperbolic plane. Relations of lengths 2, 3, and 4 are fully classified. Some
relative SU(2,1)-character varieties of the quadruply punctured sphere are
described and applied to the study of length 5 relations.
|
[{'version': 'v1', 'created': 'Tue, 27 Aug 2019 19:49:50 GMT'}
{'version': 'v2', 'created': 'Tue, 27 Oct 2020 15:07:38 GMT'}]
|
2020-10-28
|
[array(['Franco', 'Felipe A.', ''], dtype=object)
array(['Grossi', 'Carlos H.', ''], dtype=object)]
|
3,512 |
0709.4230
|
Horng-Tzer Yau
|
Chiun-Chuan Chen, Robert M. Strain, Tai-Peng Tsai, Horng-Tzer Yau
|
Lower bounds on the blow-up rate of the axisymmetric Navier-Stokes
equations II
|
More explanations and a new appendix
|
Communications in Partial Differential Equations, 34:3, 203 - 232
(2009)
|
10.1080/03605300902793956
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Consider axisymmetric strong solutions of the incompressible Navier-Stokes
equations in $\R^3$ with non-trivial swirl. Let $z$ denote the axis of symmetry
and $r$ measure the distance to the z-axis. Suppose the solution satisfies
either $|v (x,t)| \le C_*{|t|^{-1/2}} $ or, for some $\e > 0$, $|v (x,t)| \le
C_* r^{-1+\epsilon} |t|^{-\epsilon /2}$ for $-T_0\le t < 0$ and $0<C_*<\infty$
allowed to be large. We prove that $v$ is regular at time zero.
|
[{'version': 'v1', 'created': 'Wed, 26 Sep 2007 18:14:12 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Apr 2009 10:14:29 GMT'}]
|
2010-04-02
|
[array(['Chen', 'Chiun-Chuan', ''], dtype=object)
array(['Strain', 'Robert M.', ''], dtype=object)
array(['Tsai', 'Tai-Peng', ''], dtype=object)
array(['Yau', 'Horng-Tzer', ''], dtype=object)]
|
3,513 |
2102.01637
|
Giorgio Galanti
|
Giorgio Galanti, Marco Roncadelli
|
Precision cosmology made more precise
|
9 pages, 3 figures
| null | null | null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
So far, the standard attitude to solve the Friedmann equations in the
simultaneous presence of radiation $R$, matter $M$ and cosmological constant
${\Lambda}$ is to find solutions $R_R (t)$, $R_M (t)$ and $R_{\Lambda} (t)$
separately for each individual component alone, and next to join them together,
thereby obtaining a piecewise solution $R_{\rm pw} (t)$. We instead find the
exact and analytic solution $R (t)$ of the same equations in flat space.
Moreover, we quantify the error made when $R_{\rm pw} (t)$ is used in place of
$R (t)$.
|
[{'version': 'v1', 'created': 'Tue, 2 Feb 2021 17:46:29 GMT'}]
|
2021-02-03
|
[array(['Galanti', 'Giorgio', ''], dtype=object)
array(['Roncadelli', 'Marco', ''], dtype=object)]
|
3,514 |
0912.1378
|
Ke Zou
|
Ke Zou, Xia Hong, Derek Keefer and Jun Zhu
|
The Deposition of High-Quality HfO2 on Graphene and the Effect of Remote
Oxide Phonon Scattering
|
12 pages, 5 figures and supporting materials
|
Phys. Rev. Lett. 105, 126601 (2010)
|
10.1103/PhysRevLett.105.126601
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate the atomic layer deposition of high-quality HfO2 film on
graphene and report the magnitude of remote oxide phonon (ROP) scattering in
dual-oxide graphene transistors. Top gates with 30 nm HfO2 oxide layer exhibit
excellent doping capacity of greater than 1.5x10^(13)/cm^(2). The carrier
mobility in HfO2-covered graphene reaches 20,000 cm^(2)/Vs at low temperature,
which is the highest among oxide-covered graphene and compares to that of
pristine samples. The temperature-dependent resistivity exhibits the effect of
ROP scattering from both the SiO2 substrate and the HfO2 over-layer. At room
temperature, surface phonon modes of the HfO2 film centered at 54 meV dominate
and limit the carrier mobility to ~20,000 cm^(2)/Vs. Our results highlight the
important choice of oxide in graphene devices.
|
[{'version': 'v1', 'created': 'Tue, 8 Dec 2009 00:40:34 GMT'}
{'version': 'v2', 'created': 'Wed, 9 Dec 2009 15:56:32 GMT'}]
|
2010-09-17
|
[array(['Zou', 'Ke', ''], dtype=object)
array(['Hong', 'Xia', ''], dtype=object)
array(['Keefer', 'Derek', ''], dtype=object)
array(['Zhu', 'Jun', ''], dtype=object)]
|
3,515 |
2209.11059
|
Zikang Dong
|
Zikang Dong, Weijia Wang and Hao Zhang
|
Distribution of Dirichlet $L$-functions
|
24 pages
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we study the distribution of values of Dirichlet
$L$-functions, the distribution of values of the random models for Dirichlet
$L$-functions, and the discrepancy between these two kinds of distributions.
For each question, we consider the cases of $\frac12<\RE s<1$ and $\RE s=1$
separately.
|
[{'version': 'v1', 'created': 'Thu, 22 Sep 2022 14:52:36 GMT'}]
|
2022-09-23
|
[array(['Dong', 'Zikang', ''], dtype=object)
array(['Wang', 'Weijia', ''], dtype=object)
array(['Zhang', 'Hao', ''], dtype=object)]
|
3,516 |
1002.1459
|
Xavier Vinas
|
X.Vinas, P.Schuck, N.Pillet
|
Cooper pair sizes in superfluid nuclei in a simplified model
|
8 pages, 6 figures
|
Phys.Rev.C82:034314,2010
|
10.1103/PhysRevC.82.034314
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cooper pair sizes are evaluated in a simple harmonic oscillator model
reproducing the values of sophisticated HFB calculations. Underlying reasons
for the very small sizes of 2.0-2.5 fm of Cooper pairs in the surface of nuclei
are analysed. It is shown that the confining properties of the nuclear volume
is the dominating effect. It is argued that for Cooper pair sizes LDA is
particularly inadapted.
|
[{'version': 'v1', 'created': 'Sun, 7 Feb 2010 15:03:51 GMT'}
{'version': 'v2', 'created': 'Thu, 26 Aug 2010 11:00:35 GMT'}]
|
2014-11-20
|
[array(['Vinas', 'X.', ''], dtype=object)
array(['Schuck', 'P.', ''], dtype=object)
array(['Pillet', 'N.', ''], dtype=object)]
|
3,517 |
2205.03698
|
Alexander Dranishnikov
|
Alexander Dranishnikov and James Keesling
|
Embedding of Higson compactification into the product of adelic
solenoids
| null | null | null | null |
math.GN math.GT
|
http://creativecommons.org/licenses/by/4.0/
|
The Higson compactification of any simply connected proper geodesic metric
space admits an embedding into a product of adelic solenoids that induces an
isomorphism of 1-dimensional cohomology.
|
[{'version': 'v1', 'created': 'Sat, 7 May 2022 18:25:07 GMT'}]
|
2022-05-10
|
[array(['Dranishnikov', 'Alexander', ''], dtype=object)
array(['Keesling', 'James', ''], dtype=object)]
|
3,518 |
1607.00950
|
Nurlan Temirgaliyev
|
Nurlan Temirgaliyev
|
Full spectral testing of linear congruent method with a maximum period
| null | null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper the spectral analysis of all possible linear congruent
sequences with a maximum period is conducted and the best random number
generators are selected among them.
|
[{'version': 'v1', 'created': 'Mon, 4 Jul 2016 16:29:58 GMT'}
{'version': 'v2', 'created': 'Wed, 10 Oct 2018 10:53:42 GMT'}]
|
2018-10-11
|
[array(['Temirgaliyev', 'Nurlan', ''], dtype=object)]
|
3,519 |
2105.11850
|
Irina Grigorieva
|
Wenjun Kuang, Guillermo Lopez-Polin, Hyungjun Lee, Francisco Guinea,
George Whitehead, Ivan Timokhin, Alexey I. Berdyugin, Roshan Krishna Kumar,
Oleg Yazyev, Niels Walet, Alessandro Principi, Andre K. Geim, Irina V.
Grigorieva
|
Magnetization signature of topological surface states in a
non-symmorphic superconductor
|
30 pages, 4 main figures, 11 supporting figures
|
Adv. Mater. 33, 2103257 (2021)
|
10.1002/adma.202103257
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Superconductors with nontrivial band structure topology represent a class of
materials with unconventional and potentially useful properties. Recent years
have seen much success in creating artificial hybrid structures exhibiting main
characteristics of two-dimensional (2D) topological superconductors. Yet, bulk
materials known to combine inherent superconductivity with nontrivial topology
remain scarce, largely because distinguishing their central characteristic --
topological surface states -- proved challenging due to a dominant contribution
from the superconducting bulk. Reported here is a highly anomalous behaviour of
surface superconductivity in topologically nontrivial 3D superconductor In2Bi
where the surface states result from its nontrivial band structure, which
itself is a consequence of the non-symmorphic crystal symmetry and strong
spin-orbit coupling. In contrast to smoothly decreasing diamagnetic
susceptibility above the bulk critical field Hc2, associated with surface
superconductivity in conventional superconductors, we observe near-perfect,
Meissner-like screening of low-frequency magnetic fields well above Hc2. The
enhanced diamagnetism disappears at a new phase transition close to the
critical field of surface superconductivity Hc3. Using theoretical modelling,
we show that the anomalous screening is consistent with modification of surface
superconductivity due to the presence of topological surface states. The
demonstrated possibility to detect signatures of the surface states using
macroscopic magnetization measurements provides an important new tool for
discovery and identification of topological superconductors.
|
[{'version': 'v1', 'created': 'Tue, 25 May 2021 11:48:43 GMT'}]
|
2021-10-19
|
[array(['Kuang', 'Wenjun', ''], dtype=object)
array(['Lopez-Polin', 'Guillermo', ''], dtype=object)
array(['Lee', 'Hyungjun', ''], dtype=object)
array(['Guinea', 'Francisco', ''], dtype=object)
array(['Whitehead', 'George', ''], dtype=object)
array(['Timokhin', 'Ivan', ''], dtype=object)
array(['Berdyugin', 'Alexey I.', ''], dtype=object)
array(['Kumar', 'Roshan Krishna', ''], dtype=object)
array(['Yazyev', 'Oleg', ''], dtype=object)
array(['Walet', 'Niels', ''], dtype=object)
array(['Principi', 'Alessandro', ''], dtype=object)
array(['Geim', 'Andre K.', ''], dtype=object)
array(['Grigorieva', 'Irina V.', ''], dtype=object)]
|
3,520 |
math/0607411
|
Jean-Gabriel Luque
|
G\'erard Duchamp (LIPN), Eric Laugerotte (LIFAR EA2655), Jean-Gabriel
Luque (IGM-LabInfo)
|
Extending the scalars of minimizations
| null |
SCI, \'{E}tats-Unis d'Am\'{e}rique (2001)
| null | null |
math.CO cs.DS cs.SC
| null |
In the classical theory of formal languages, finite state automata allow to
recognize the words of a rational subset of $\Sigma^*$ where $\Sigma$ is a set
of symbols (or the alphabet). Now, given a semiring $(\K,+,.)$, one can
construct $\K$-subsets of $\Sigma^*$ in the sense of Eilenberg, that are
alternatively called noncommutative formal power series for which a framework
very similar to language theory has been constructed Particular noncommutative
formal power series, which are called rational series, are the behaviour of a
family of weighted automata (or $\K$-automata). In order to get an efficient
encoding, it may be interesting to point out one of them with the smallest
number of states. Minimization processes of $\K$-automata already exist for
$\K$ being: {\bf a)} a field, {\bf b)} a noncommutative field, {\bf c)} a PID .
When $\K$ is the bolean semiring, such a minimization process (with
isomorphisms of minimal objects) is known within the category of deterministic
automata. Minimal automata have been proved to be isomorphic in cases {\bf (a)}
and {\bf (b)}. But the proof given for (b) is not constructive. In fact, it
lays on the existence of a basis for a submodule of $\K^n$. Here we give an
independent algorithm which reproves this fact and an example of a pair of
nonisomorphic minimal automata. Moreover, we examine the possibility of
extending {\bf (c)}. To this end, we provide an {\em Effective Minimization
Process} (or {\em EMP}) which can be used for more general sets of
coefficients.
|
[{'version': 'v1', 'created': 'Tue, 18 Jul 2006 07:06:59 GMT'}]
|
2016-08-16
|
[array(['Duchamp', 'Gérard', '', 'LIPN'], dtype=object)
array(['Laugerotte', 'Eric', '', 'LIFAR EA2655'], dtype=object)
array(['Luque', 'Jean-Gabriel', '', 'IGM-LabInfo'], dtype=object)]
|
3,521 |
2209.11260
|
Karim Abu-Affash
|
A. Karim Abu-Affash, Paz Carmi, Meytal Maman
|
Piercing Diametral Disks Induced by Edges of Maximum Spanning Tree
|
7 pages, 4 figures
| null | null | null |
cs.CG
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Let $P$ be a set of points in the plane and let $T$ be a maximum-weight
spanning tree of $P$. For an edge $(p,q)$, let $D_{pq}$ be the diametral disk
induced by $(p,q)$, i.e., the disk having the segment $\overline{pq}$ as its
diameter. Let $\cal{D_T}$ be the set of the diametral disks induced by the
edges of $T$. In this paper, we show that one point is sufficient to pierce all
the disks in $\cal{D_T}$, thus, the set $\cal{D_T}$ is Helly. Actually, we show
that the center of the smallest enclosing circle of $P$ is contained in all the
disks of $\cal{D_T}$, and thus the piercing point can be computed in linear
time.
|
[{'version': 'v1', 'created': 'Thu, 22 Sep 2022 18:10:32 GMT'}]
|
2022-09-26
|
[array(['Abu-Affash', 'A. Karim', ''], dtype=object)
array(['Carmi', 'Paz', ''], dtype=object)
array(['Maman', 'Meytal', ''], dtype=object)]
|
3,522 |
2107.06842
|
Nelly Villamizar
|
Deepesh Toshniwal and Nelly Villamizar
|
Algebraic Methods for Supersmooth Spline Spaces
|
24 pages, 2 Figures, 2 Tables
| null | null | null |
math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multivariate piecewise polynomial functions (or splines) on polyhedral
complexes have been extensively studied over the past decades and find
applications in diverse areas of applied mathematics including numerical
analysis, approximation theory, and computer aided geometric design. In this
paper we address various challenges arising in the study of splines with
enhanced mixed (super-)smoothness conditions at the vertices and across
interior faces of the partition. Such supersmoothness can be imposed but can
also appear unexpectedly on certain splines depending on the geometry of the
underlying polyhedral partition. Using algebraic tools, a generalization of the
Billera-Schenck-Stillman complex that includes the effect of additional
smoothness constraints leads to a construction which requires the analysis of
ideals generated by products of powers of linear forms in several variables.
Specializing to the case of planar triangulations, a combinatorial lower bound
on the dimension of splines with supersmoothness at the vertices is presented,
and we also show that this lower bound gives the exact dimension in high
degree. The methods are further illustrated with several examples.
|
[{'version': 'v1', 'created': 'Wed, 14 Jul 2021 16:58:08 GMT'}]
|
2021-07-15
|
[array(['Toshniwal', 'Deepesh', ''], dtype=object)
array(['Villamizar', 'Nelly', ''], dtype=object)]
|
3,523 |
1306.5226
|
Kunal Narayan Chaudhury
|
Kunal N. Chaudhury, Yuehaw Khoo, Amit Singer
|
Global registration of multiple point clouds using semidefinite
programming
|
33 pages, 12 figures. To appear in SIAM Journal on Optimization
| null | null | null |
cs.CV cs.NA math.NA math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Consider $N$ points in $\mathbb{R}^d$ and $M$ local coordinate systems that
are related through unknown rigid transforms. For each point we are given
(possibly noisy) measurements of its local coordinates in some of the
coordinate systems. Alternatively, for each coordinate system, we observe the
coordinates of a subset of the points. The problem of estimating the global
coordinates of the $N$ points (up to a rigid transform) from such measurements
comes up in distributed approaches to molecular conformation and sensor network
localization, and also in computer vision and graphics.
The least-squares formulation of this problem, though non-convex, has a well
known closed-form solution when $M=2$ (based on the singular value
decomposition). However, no closed form solution is known for $M\geq 3$.
In this paper, we demonstrate how the least-squares formulation can be
relaxed into a convex program, namely a semidefinite program (SDP). By setting
up connections between the uniqueness of this SDP and results from rigidity
theory, we prove conditions for exact and stable recovery for the SDP
relaxation. In particular, we prove that the SDP relaxation can guarantee
recovery under more adversarial conditions compared to earlier proposed
spectral relaxations, and derive error bounds for the registration error
incurred by the SDP relaxation.
We also present results of numerical experiments on simulated data to confirm
the theoretical findings. We empirically demonstrate that (a) unlike the
spectral relaxation, the relaxation gap is mostly zero for the semidefinite
program (i.e., we are able to solve the original non-convex least-squares
problem) up to a certain noise threshold, and (b) the semidefinite program
performs significantly better than spectral and manifold-optimization methods,
particularly at large noise levels.
|
[{'version': 'v1', 'created': 'Fri, 21 Jun 2013 19:55:40 GMT'}
{'version': 'v2', 'created': 'Sun, 21 Jul 2013 15:36:47 GMT'}
{'version': 'v3', 'created': 'Tue, 3 Sep 2013 01:51:11 GMT'}
{'version': 'v4', 'created': 'Fri, 4 Jul 2014 18:41:18 GMT'}
{'version': 'v5', 'created': 'Tue, 23 Dec 2014 08:01:28 GMT'}]
|
2014-12-24
|
[array(['Chaudhury', 'Kunal N.', ''], dtype=object)
array(['Khoo', 'Yuehaw', ''], dtype=object)
array(['Singer', 'Amit', ''], dtype=object)]
|
3,524 |
1305.1628
|
Enrico Maria Corsini
|
E. Portaluri (1), E. M. Corsini (1,2), L. Morelli (1,2), M. Hartmann
(3), E. Dalla Bont\`a (1,2), Victor P. Debattista (4), A. Pizzella (1,2) ((1)
Dipartimento di Fisica e Astronomia 'G. Galilei', Universit\`a di Padova, (2)
INAF-Osservatorio Astronomico di Padova, (3) Astronomisches Rechen-Institut,
Zentrum f\"ur Astronomie, Universit\"at Heidelberg, (4) Jeremiah Horrocks
Institute, University of Central Lancashire)
|
Searching for nuclear stellar discs in simulations of star cluster
mergers
|
12 pages, 6 figures, accepted for publication in MNRAS
| null |
10.1093/mnras/stt738
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The nuclei of galaxies often host small stellar discs with scale-lengths of a
few tens of parsecs and luminosities up to 10^7 Lsun. To investigate the
formation and properties of nuclear stellar discs (NSDs), we look for their
presence in a set of N-body simulations studying the dissipationless merging of
multiple star clusters in galactic nuclei. A few tens of star clusters with
sizes and masses comparable to those of globular clusters observed in the Milky
Way are accreted onto a pre-existing nuclear stellar component: either a
massive super star cluster or a rapidly rotating, compact disc with a
scale-length of a few parsecs, mimicing the variety of observed nuclear
structures. Images and kinematic maps of the simulation time-steps are then
built and analysed as if they were real and at the distance of the Virgo
cluster. We use the Scorza-Bender method to search for the presence of disc
structures via photometric decomposition. In one case the merger remnant has
all the observed photometric and kinematic properties of NSDs observed in real
galaxies. This shows that current observations are consistent with most of the
NSD mass being assembled from the migration and accretion of star clusters into
the galactic centre. In the other simulation instead, we detect an elongated
structure from the unsharp masked image, that does not develop the photometric
or kinematic signature of a NSD. Thus, in the context of searches for a disc
structure, the Scorza-Bender method is a robust and necessary tool.
|
[{'version': 'v1', 'created': 'Tue, 7 May 2013 20:00:07 GMT'}]
|
2015-06-15
|
[array(['Portaluri', 'E.', ''], dtype=object)
array(['Corsini', 'E. M.', ''], dtype=object)
array(['Morelli', 'L.', ''], dtype=object)
array(['Hartmann', 'M.', ''], dtype=object)
array(['Bontà', 'E. Dalla', ''], dtype=object)
array(['Debattista', 'Victor P.', ''], dtype=object)
array(['Pizzella', 'A.', ''], dtype=object)]
|
3,525 |
2211.02513
|
Roel Lambers
|
Frits Spieksma and Rudi Pendavingh and Roel Lambers
|
How to Design a Stable Serial Knockout Competition
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate a new tournament format that consists of a series of
individual knockout tournaments; we call this new format a Serial Knockout
Competition (SKC). This format has recently been adopted by the Professional
Darts Corporation. Depending on the seedings of the players used for each of
the knockout tournaments, players can meet in the various rounds (eg first
round, second round, ..., semi-final, final) of the knockout tournaments.
Following a fairness principle of treating all players equal, we identify an
attractive property of an SKC: each pair of players should potentially meet
equally often in each of the rounds of the SKC. If the seedings are such that
this property is indeed present, we call the resulting SKC stable. In this note
we formalize this notion, and we address the question: do there exist seedings
for each of the knockout tournaments such that the resulting SKC is stable? We
show, using a connection to the Fano plane, that the answer is yes for 8
players. We show how to generalize this to any number of players that is a
power of 2, and we provide stable schedules for competitions on 16 and 32
players
|
[{'version': 'v1', 'created': 'Fri, 4 Nov 2022 15:16:30 GMT'}]
|
2022-11-07
|
[array(['Spieksma', 'Frits', ''], dtype=object)
array(['Pendavingh', 'Rudi', ''], dtype=object)
array(['Lambers', 'Roel', ''], dtype=object)]
|
3,526 |
2211.05565
|
Mehdi Rafiei
|
Mehdi Rafiei, Jenni Raitoharju, Alexandros Iosifidis
|
Computer Vision on X-ray Data in Industrial Production and Security
Applications: A Comprehensive Survey
|
32pages, 20 figures, 12 tables. A literature review paper. Journal
| null |
10.1109/ACCESS.2023.3234187
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
X-ray imaging technology has been used for decades in clinical tasks to
reveal the internal condition of different organs, and in recent years, it has
become more common in other areas such as industry, security, and geography.
The recent development of computer vision and machine learning techniques has
also made it easier to automatically process X-ray images and several machine
learning-based object (anomaly) detection, classification, and segmentation
methods have been recently employed in X-ray image analysis. Due to the high
potential of deep learning in related image processing applications, it has
been used in most of the studies. This survey reviews the recent research on
using computer vision and machine learning for X-ray analysis in industrial
production and security applications and covers the applications, techniques,
evaluation metrics, datasets, and performance comparison of those techniques on
publicly available datasets. We also highlight some drawbacks in the published
research and give recommendations for future research in computer vision-based
X-ray analysis.
|
[{'version': 'v1', 'created': 'Thu, 10 Nov 2022 13:37:36 GMT'}
{'version': 'v2', 'created': 'Mon, 2 Jan 2023 16:14:03 GMT'}]
|
2023-01-11
|
[array(['Rafiei', 'Mehdi', ''], dtype=object)
array(['Raitoharju', 'Jenni', ''], dtype=object)
array(['Iosifidis', 'Alexandros', ''], dtype=object)]
|
3,527 |
hep-lat/9405006
|
Graham Boyd
|
G. Boyd, Sourendu Gupta, F. Karsch and E. Laermann
|
Spatial and Temporal Hadron Correlators below and above the Chiral Phase
Transition
|
19 pages HLRZ 54/93, BI-TP 93/76, TIFR/TH/94-12
|
Z.Phys. C64 (1994) 331-338
|
10.1007/BF01557406
| null |
hep-lat
| null |
Hadronic correlation functions at finite temperature in QCD, with four
flavours of dynamical quarks, have been analyzed both above and below the
chiral symmetry restoration temperature. We have used both point and extended
sources for spatial as well as temporal correlators. The effect of periodic
temporal boundary conditions for the valence quarks on the spatial meson
correlators has also been investigated. All our results are consistent with the
existence of individual quarks at high temperatures. A measurement of the
residual interaction between the quarks is presented.
|
[{'version': 'v1', 'created': 'Fri, 6 May 1994 10:15:51 GMT'}]
|
2009-10-22
|
[array(['Boyd', 'G.', ''], dtype=object)
array(['Gupta', 'Sourendu', ''], dtype=object)
array(['Karsch', 'F.', ''], dtype=object)
array(['Laermann', 'E.', ''], dtype=object)]
|
3,528 |
1103.5181
|
Ying Ding
|
Huijun Wang, Ying Ding, Jie Tang, Xiao Dong, Bing He, Judy Qiu, David
J. Wild
|
Finding Complex Biological Relationships in Recent PubMed Articles Using
Bio-LDA
|
14 pages, 8 figures, 10 tables
|
PLoS ONE (2011) 6(3): e17243
|
10.1371/journal.pone.0017243
| null |
q-bio.QM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The overwhelming amount of available scholarly literature in the life
sciences poses significant challenges to scientists wishing to keep up with
important developments related to their research, but also provides a useful
resource for the discovery of recent information concerning genes, diseases,
compounds and the interactions between them. In this paper, we describe an
algorithm called Bio-LDA that uses extracted biological terminology to
automatically identify latent topics, and provides a variety of measures to
uncover putative relations among topics and bio-terms. Relationships identified
using those approaches are combined with existing data in life science datasets
to provide additional insight. Three case studies demonstrate the utility of
the Bio-LDA model, including association predication, association search and
connectivity map generation. This combined approach offers new opportunities
for knowledge discovery in many areas of biology including target
identification, lead hopping and drug repurposing.
|
[{'version': 'v1', 'created': 'Sun, 27 Mar 2011 04:13:16 GMT'}]
|
2011-03-29
|
[array(['Wang', 'Huijun', ''], dtype=object)
array(['Ding', 'Ying', ''], dtype=object)
array(['Tang', 'Jie', ''], dtype=object)
array(['Dong', 'Xiao', ''], dtype=object)
array(['He', 'Bing', ''], dtype=object)
array(['Qiu', 'Judy', ''], dtype=object)
array(['Wild', 'David J.', ''], dtype=object)]
|
3,529 |
2208.13168
|
YongKeun Park
|
Jeonghun Oh, Herve Hugonnet, YongKeun Park
|
Quantitative phase imaging via the holomorphic property of complex
optical fields
| null | null | null | null |
physics.optics math-ph math.MP
|
http://creativecommons.org/licenses/by/4.0/
|
An optical field is described by the amplitude and phase, and thus has a
complex representation described in the complex plane. However, because the
only thing we can measure is the amplitude of the complex field on the real
axis, it is difficult to identify how the complex field behaves throughout the
complex plane. In this study, we interpreted quantitative phase imaging methods
via the Hilbert transform in terms of analytic continuation, manifesting the
behavior in the whole complex plane. Using Rouche's theorem, we proved the
imaging conditions imposed by Kramers-Kronig holographic imaging. The deviation
from the Kramers-Kronig holography conditions was examined using computational
images and experimental data. We believe that this study provides a clue for
holographic imaging using the holomorphic characteristics of a complex optical
field.
|
[{'version': 'v1', 'created': 'Sun, 28 Aug 2022 08:02:25 GMT'}]
|
2022-08-30
|
[array(['Oh', 'Jeonghun', ''], dtype=object)
array(['Hugonnet', 'Herve', ''], dtype=object)
array(['Park', 'YongKeun', ''], dtype=object)]
|
3,530 |
2006.14195
|
Kuanqi Cai
|
Kuanqi Cai, Chaoqun Wang, Jiyu Cheng, Clarence W De Silva (Fellow,
IEEE), and Max Q.-H. Meng (Fellow, IEEE)
|
Mobile Robot Path Planning in Dynamic Environments: A Survey
| null |
Instrumentation,2019,6(02):90-100
|
10.15878/j.cnki.instrumentation.2019.02.010
| null |
cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There are many challenges for robot navigation in densely populated dynamic
environments. This paper presents a survey of the path planning methods for
robot navigation in dense environments. Particularly, the path planning in the
navigation framework of mobile robots is composed of global path planning and
local path planning, with regard to the planning scope and the executability.
Within this framework, the recent progress of the path planning methods is
presented in the paper, while examining their strengths and weaknesses.
Notably, the recently developed Velocity Obstacle method and its variants that
serve as the local planner are analyzed comprehensively. Moreover, as a
model-free method that is widely used in current robot applications, the
reinforcement learning-based path planning algorithms are detailed in this
paper.
|
[{'version': 'v1', 'created': 'Thu, 25 Jun 2020 06:20:20 GMT'}
{'version': 'v2', 'created': 'Mon, 22 Mar 2021 11:13:15 GMT'}]
|
2021-03-23
|
[array(['Cai', 'Kuanqi', '', 'Fellow,\n IEEE'], dtype=object)
array(['Wang', 'Chaoqun', '', 'Fellow,\n IEEE'], dtype=object)
array(['Cheng', 'Jiyu', '', 'Fellow,\n IEEE'], dtype=object)
array(['De Silva', 'Clarence W', '', 'Fellow,\n IEEE'], dtype=object)
array(['Meng', 'Max Q. -H.', '', 'Fellow, IEEE'], dtype=object)]
|
3,531 |
nucl-th/0003029
|
Jorge Piekarewicz
|
J. Piekarewicz
|
Relativistic Approach to Isoscalar Giant Resonances in 208Pb
|
4 Revtex pages and 3 eps figures; submitted to PRC
|
Phys.Rev. C62 (2000) 051304
|
10.1103/PhysRevC.62.051304
| null |
nucl-th astro-ph nucl-ex
| null |
We calculate the longitudinal response of 208Pb using a relativistic
random-phase approximation to three different parameterizations of the Walecka
model with scalar self-interactions. From a nonspectral calculation of the
response-that automatically includes the mixing between positive- and
negative-energy states-we extract the distribution of strength for the
isoscalar monopole, dipole, and high-energy octupole resonances. We employ a
consistent formalism that uses the same interaction in the calculation of the
ground state as in the calculation of the response. As a result, the
conservation of the vector current is strictly maintained throughout the
calculation. Further, at small momentum transfers the spurious dipole
strength-associated with the uniform translation of the center-of-mass-gets
shifted to zero excitation energy and is cleanly separated from the sole
remaining physical fragment located at an excitation energy of about 24 MeV; no
additional dipole strength is observed. The best description of the collective
modes is obtained using a ``soft'' parameterization having a compression
modulus of K=224 MeV.
|
[{'version': 'v1', 'created': 'Mon, 13 Mar 2000 23:19:44 GMT'}]
|
2009-11-06
|
[array(['Piekarewicz', 'J.', ''], dtype=object)]
|
3,532 |
hep-ex/9811044
|
Alan J. Weinstein
|
Alan J. Weinstein
|
TAU 98 Conference Summary
|
Invited talk at the TAU'98 Workshop, 14-17 September 1998, Santander,
Spain. 24 pages, 18 postscripts figs, LaTeX
|
Nucl.Phys.Proc.Suppl. 76 (1999) 497-520
|
10.1016/S0920-5632(99)00512-5
| null |
hep-ex
| null |
I very briefly review the highlights of the fifth workshop on the physics of
the tau lepton and its neutrino. There has been much progress in many
sub-fields, which I touch upon in this review: the couplings of the tau to the
$Z^0$ and $W^\pm$; the leptonic branching fractions, lifetime, and tests of
universality; the Lorentz structure of tau decays; searches for neutrinoless
decays; limits on weak and electromagnetic dipole moments and CP violation;
inclusive semi-hadronic decays, spectral functions, sum rules, QCD, and
applications; substructure in tau decays to three pseudoscalars; tau decays to
kaons; limits on the mass of the tau neutrino; tau neutrinos from solar,
atmospheric, and AGN sources; accelerator searches for neutrino oscillations;
and prospects for the future.
|
[{'version': 'v1', 'created': 'Wed, 25 Nov 1998 22:04:39 GMT'}]
|
2009-10-31
|
[array(['Weinstein', 'Alan J.', ''], dtype=object)]
|
3,533 |
2104.08002
|
Narendra Chaudhary
|
Narendra Chaudhary, Sanchit Misra, Dhiraj Kalamkar, Alexander
Heinecke, Evangelos Georganas, Barukh Ziv, Menachem Adelman, Bharat Kaul
|
Efficient and Generic 1D Dilated Convolution Layer for Deep Learning
| null | null | null | null |
cs.LG cs.AI cs.DC
|
http://creativecommons.org/licenses/by/4.0/
|
Convolutional neural networks (CNNs) have found many applications in tasks
involving two-dimensional (2D) data, such as image classification and image
processing. Therefore, 2D convolution layers have been heavily optimized on
CPUs and GPUs. However, in many applications - for example genomics and speech
recognition, the data can be one-dimensional (1D). Such applications can
benefit from optimized 1D convolution layers. In this work, we introduce our
efficient implementation of a generic 1D convolution layer covering a wide
range of parameters. It is optimized for x86 CPU architectures, in particular,
for architectures containing Intel AVX-512 and AVX-512 BFloat16 instructions.
We use the LIBXSMM library's batch-reduce General Matrix Multiplication
(BRGEMM) kernel for FP32 and BFloat16 precision. We demonstrate that our
implementation can achieve up to 80% efficiency on Intel Xeon Cascade Lake and
Cooper Lake CPUs. Additionally, we show the generalization capability of our
BRGEMM based approach by achieving high efficiency across a range of
parameters. We consistently achieve higher efficiency than the 1D convolution
layer with Intel oneDNN library backend for varying input tensor widths, filter
widths, number of channels, filters, and dilation parameters. Finally, we
demonstrate the performance of our optimized 1D convolution layer by utilizing
it in the end-to-end neural network training with real genomics datasets and
achieve up to 6.86x speedup over the oneDNN library-based implementation on
Cascade Lake CPUs. We also demonstrate the scaling with 16 sockets of
Cascade/Cooper Lake CPUs and achieve significant speedup over eight V100 GPUs
using a similar power envelop. In the end-to-end training, we get a speedup of
1.41x on Cascade Lake with FP32, 1.57x on Cooper Lake with FP32, and 2.27x on
Cooper Lake with BFloat16 over eight V100 GPUs with FP32.
|
[{'version': 'v1', 'created': 'Fri, 16 Apr 2021 09:54:30 GMT'}]
|
2021-04-19
|
[array(['Chaudhary', 'Narendra', ''], dtype=object)
array(['Misra', 'Sanchit', ''], dtype=object)
array(['Kalamkar', 'Dhiraj', ''], dtype=object)
array(['Heinecke', 'Alexander', ''], dtype=object)
array(['Georganas', 'Evangelos', ''], dtype=object)
array(['Ziv', 'Barukh', ''], dtype=object)
array(['Adelman', 'Menachem', ''], dtype=object)
array(['Kaul', 'Bharat', ''], dtype=object)]
|
3,534 |
1806.08408
|
Jingfu Zhang
|
Jingfu Zhang, Swathi S Hegde and Dieter Suter
|
Pulse sequences for controlled 2- and 3-qubit gates in a hybrid quantum
register
| null |
Phys. Rev. A 98, 042302 (2018)
|
10.1103/PhysRevA.98.042302
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose and demonstrate a quantum control scheme for hybrid quantum
registers that can reduce the operation time, and therefore the effects of
relaxation, compared to existing implementations. It combines resonant
excitation pulses with periods of free precession under the internal
Hamiltonian of the qubit system. We use this scheme to implement quantum gates
like controlled-NOT operations on electronic and nuclear spins of the
nitrogen-vacancy center in diamond. As a specific application, we transfer
population between electronic and nuclear spin qubits and use it to measure the
Rabi oscillations of a nuclear spin in a system with multiple coupled spins.
|
[{'version': 'v1', 'created': 'Thu, 21 Jun 2018 19:38:36 GMT'}]
|
2018-10-10
|
[array(['Zhang', 'Jingfu', ''], dtype=object)
array(['Hegde', 'Swathi S', ''], dtype=object)
array(['Suter', 'Dieter', ''], dtype=object)]
|
3,535 |
2202.11834
|
Nutcha Wattanachit
|
Nutcha Wattanachit, Evan L. Ray, Thomas C. McAndrew, Nicholas G. Reich
|
Comparison of Combination Methods to Create Calibrated Ensemble
Forecasts for Seasonal Influenza in the U.S
| null | null | null | null |
stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
The characteristics of influenza seasons varies substantially from year to
year, posing challenges for public health preparation and response. Influenza
forecasting is used to inform seasonal outbreak response, which can in turn
potentially reduce the societal impact of an epidemic. The United States
Centers for Disease Control and Prevention, in collaboration with external
researchers, has run an annual prospective influenza forecasting exercise,
known as the FluSight challenge. A subset of participating teams has worked
together to produce a collaborative multi-model ensemble, the FluSight Network
ensemble. Uniting theoretical results from the forecasting literature with
domain-specific forecasts from influenza outbreaks, we applied parametric
forecast combination methods that simultaneously optimize individual model
weights and calibrate the ensemble via a beta transformation. We used the
beta-transformed linear pool and the finite beta mixture model to produce
ensemble forecasts retrospectively for the 2016/2017 to 2018/2019 influenza
seasons in the U.S. We compared their performance to methods currently used in
the FluSight challenge, namely the equally weighted linear pool and the linear
pool. Ensemble forecasts produced from methods with a beta transformation were
shown to outperform those from the equally weighted linear pool and the linear
pool for all week-ahead targets across in the test seasons based on average log
scores. We observed improvements in overall accuracy despite the
beta-transformed linear pool or beta mixture methods' modest under-prediction
across all targets and seasons. Combination techniques that explicitly adjust
for known calibration issues in linear pooling should be considered to improve
ensemble probabilistic scores in outbreak settings.
|
[{'version': 'v1', 'created': 'Thu, 24 Feb 2022 00:02:34 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Mar 2022 17:26:14 GMT'}]
|
2022-03-16
|
[array(['Wattanachit', 'Nutcha', ''], dtype=object)
array(['Ray', 'Evan L.', ''], dtype=object)
array(['McAndrew', 'Thomas C.', ''], dtype=object)
array(['Reich', 'Nicholas G.', ''], dtype=object)]
|
3,536 |
1106.2706
|
Qing-Ming Zhang
|
A. M. Zhang, J. H. Xiao, Y. S. Li, J. B. He, D. M. Wang, G. F. Chen,
B. Normand, Q. M. Zhang, and T. Xiang
|
Two-magnon Raman scattering in A$_{0.8}$Fe$_{1.6}$Se$_2$ systems:
competition between superconductivity and antiferromagnetic order
|
8 pages, 5 figures
|
Phys. Rev. B 85, 214508 (2012)
|
10.1103/PhysRevB.85.214508
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have performed Raman-scattering measurements on high-quality single
crystals of A$_{0.8}$Fe$_{1.6}$Se$_2$ superconductors of several compositions.
We find a broad, asymmetric peak around 1600 cm$^{-1}$ (200 meV), which we
identify as a two-magnon process involving optical magnons. The intensity of
the two-magnon peak falls sharply on entering the superconducting phase. This
effect, which is entirely absent in the non-superconducting system
KFe$_{1.5}$Se$_2$, requires a strong mutual exclusion between
antiferromagnetism and superconductivity arising from proximity effects within
regions of microscale phase separation.
|
[{'version': 'v1', 'created': 'Tue, 14 Jun 2011 13:19:55 GMT'}
{'version': 'v2', 'created': 'Sat, 28 Apr 2012 04:59:30 GMT'}]
|
2013-05-30
|
[array(['Zhang', 'A. M.', ''], dtype=object)
array(['Xiao', 'J. H.', ''], dtype=object)
array(['Li', 'Y. S.', ''], dtype=object)
array(['He', 'J. B.', ''], dtype=object)
array(['Wang', 'D. M.', ''], dtype=object)
array(['Chen', 'G. F.', ''], dtype=object)
array(['Normand', 'B.', ''], dtype=object)
array(['Zhang', 'Q. M.', ''], dtype=object)
array(['Xiang', 'T.', ''], dtype=object)]
|
3,537 |
1309.0001
|
Masahiko Ito
|
Masahiko Ito, Peter J. Forrester
|
A bilateral extension of the $q$-Selberg integral
|
36 pages. V6: minor corrections. arXiv admin note: text overlap with
arXiv:1308.6650
|
Trans. Amer. Math. Soc. 369 (2017), no. 4, 2843--2878
|
10.1090/tran/6851
| null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A multi-dimensional bilateral $q$-series extending the $q$-Selberg integral
is studied using concepts of truncation, regularization and connection
formulae. Following Aomoto's method, which involves regarding the $q$-series as
a solution of a $q$-difference equation fixed by its asymptotic behavior, an
infinite product evaluation is obtained. The $q$-difference equation is derived
applying the shifted symmetric polynomials introduced by Knop and Sahi. As a
special case of the infinite product formula, Askey--Evans's $q$-Selberg
integral evaluation and its generalization by Tarasov--Varchenko and Stokman is
reclaimed, and an explanation in the context of Aomoto's setting is thus
provided.
|
[{'version': 'v1', 'created': 'Fri, 30 Aug 2013 07:41:27 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Dec 2013 14:28:29 GMT'}
{'version': 'v3', 'created': 'Tue, 1 Sep 2015 12:59:42 GMT'}
{'version': 'v4', 'created': 'Thu, 8 Oct 2015 12:57:51 GMT'}
{'version': 'v5', 'created': 'Thu, 29 Oct 2015 07:55:33 GMT'}
{'version': 'v6', 'created': 'Sat, 29 Oct 2016 07:59:43 GMT'}]
|
2017-01-11
|
[array(['Ito', 'Masahiko', ''], dtype=object)
array(['Forrester', 'Peter J.', ''], dtype=object)]
|
3,538 |
2203.08835
|
David Setton
|
David J. Setton, Margaret Verrico, Rachel Bezanson, Jenny E. Greene,
Katherine A. Suess, Andy D. Goulding, Justin S. Spilker, Mariska Kriek,
Robert Feldmann, Desika Narayanan, Khalil Hall-Hooper, Erin Kado-Fong
|
The Compact Structures of Massive $z\sim0.7$ Post-Starburst Galaxies in
the SQuIGG$\vec{L}$E Sample
|
28 pages, 19 figures, 2 appendices, updated to accepted ApJ version
| null |
10.3847/1538-4357/ac6096
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by/4.0/
|
We present structural measurements of 145 spectroscopically selected
intermediate-redshift (z$\sim$0.7), massive ($M_\star \sim 10^{11} \ M_\odot$)
post-starburst galaxies from the SQuIGG$\vec{L}$E Sample measured using
wide-depth Hyper Suprime-Cam i-band imaging. This deep imaging allows us to
probe the sizes and structures of these galaxies, which we compare to a control
sample of star forming and quiescent galaxies drawn from the LEGA-C Survey. We
find that post-starburst galaxies systematically lie $\sim0.1$ dex below the
quiescent mass-size (half-light radius) relation, with a scatter of $\sim0.2$
dex. This finding is bolstered by non-parametric measures, such as the Gini
coefficient and the concentration, which also reveal these galaxies to have
more compact light profiles than both quiescent and star-forming populations at
similar mass and redshift. The sizes of post-starburst galaxies show either
negative or no correlation with the time since quenching, such that more
recently quenched galaxies are larger or similarly sized. This empirical
finding disfavors the formation of post-starburst galaxies via a purely central
burst of star formation that simultaneously shrinks the galaxy and shuts off
star formation. We show that the central densities of post-starburst and
quiescent galaxies at this epoch are very similar, in contrast with their
effective radii. The structural properties of z$\sim$0.7 post-starburst
galaxies match those of quiescent galaxies that formed in the early universe,
suggesting that rapid quenching in the present epoch is driven by a similar
mechanism to the one at high redshift.
|
[{'version': 'v1', 'created': 'Wed, 16 Mar 2022 18:00:02 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Jun 2022 15:09:02 GMT'}]
|
2022-06-14
|
[array(['Setton', 'David J.', ''], dtype=object)
array(['Verrico', 'Margaret', ''], dtype=object)
array(['Bezanson', 'Rachel', ''], dtype=object)
array(['Greene', 'Jenny E.', ''], dtype=object)
array(['Suess', 'Katherine A.', ''], dtype=object)
array(['Goulding', 'Andy D.', ''], dtype=object)
array(['Spilker', 'Justin S.', ''], dtype=object)
array(['Kriek', 'Mariska', ''], dtype=object)
array(['Feldmann', 'Robert', ''], dtype=object)
array(['Narayanan', 'Desika', ''], dtype=object)
array(['Hall-Hooper', 'Khalil', ''], dtype=object)
array(['Kado-Fong', 'Erin', ''], dtype=object)]
|
3,539 |
1201.1126
|
Martin Magnuson
|
M. Magnuson, L. Yang, J.- H. Guo, C. S{\aa}the, A. Agui, J. Nordgren,
Y. Luo, H. {\AA}gren, N. Johansson, W. R. Salaneck, L. E. Horsburgh and A. P.
Monkman
|
The electronic structure of poly(pyridine-2,5-diyl) investigated by soft
x-ray absorption and emission spectroscopies
|
11 pages, 7 figures, 1 table,
http://www.sciencedirect.com/science/article/pii/S0301010498002626
|
Chemical Physics 237, 295 (1998)
|
10.1016/S0301-0104(98)00262-6
| null |
cond-mat.soft physics.chem-ph physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The electronic structure of the poly-pyridine conjugated polymer has been
investigated by resonant and nonresonant inelastic X-ray scattering and X-ray
absorption spectroscopies using synchrotron radiation. The measurements were
made for both the carbon and nitrogen contents of the polymer. The analysis of
the spectra has been carried out in comparison with molecular orbital
calculations taking the repeat-unit cell as a model molecule of the polymer
chain. The simulations indicate no significant differences in the absorption
and in the non-resonant X-ray scattering spectra for the different isomeric
geometries, while some isomeric dependence of the resonant spectra is
predicted. The resonant emission spectra show depletion of the {\pi} electron
bands in line with symmetry selection and momentum conservation rules. The
effect is most vizual for the carbon spectra; the nitrogen spectra are
dominated by lone pair n orbital emission of {\sigma} symmetry and are less
frequency dependent.
|
[{'version': 'v1', 'created': 'Thu, 5 Jan 2012 11:23:11 GMT'}]
|
2012-01-06
|
[array(['Magnuson', 'M.', ''], dtype=object)
array(['Yang', 'L.', ''], dtype=object)
array(['Guo', 'J. - H.', ''], dtype=object)
array(['Såthe', 'C.', ''], dtype=object)
array(['Agui', 'A.', ''], dtype=object)
array(['Nordgren', 'J.', ''], dtype=object)
array(['Luo', 'Y.', ''], dtype=object)
array(['Ågren', 'H.', ''], dtype=object)
array(['Johansson', 'N.', ''], dtype=object)
array(['Salaneck', 'W. R.', ''], dtype=object)
array(['Horsburgh', 'L. E.', ''], dtype=object)
array(['Monkman', 'A. P.', ''], dtype=object)]
|
3,540 |
1708.01457
|
Hamid Hoorfar
|
Hamid Hoorfar and Alireza Bagheri
|
Geometric Embedding of Path and Cycle Graphs in Pseudo-convex Polygons
| null | null | null | null |
cs.CG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given a graph $ G $ with $ n $ vertices and a set $ S $ of $ n $ points in
the plane, a point-set embedding of $ G $ on $ S $ is a planar drawing such
that each vertex of $ G $ is mapped to a distinct point of $ S $. A
straight-line point-set embedding is a point-set embedding with no edge bends
or curves. The point-set embeddability problem is NP-complete, even when $ G $
is $ 2 $-connected and $ 2 $-outerplanar. It has been solved polynomially only
for a few classes of planar graphs. Suppose that $ S $ is the set of vertices
of a simple polygon. A straight-line polygon embedding of a graph is a
straight-line point-set embedding of the graph onto the vertices of the polygon
with no crossing between edges of graph and the edges of polygon. In this
paper, we present $ O(n) $-time algorithms for polygon embedding of path and
cycle graphs in simple convex polygon and same time algorithms for polygon
embedding of path and cycle graphs in a large type of simple polygons where $n$
is the number of vertices of the polygon.
|
[{'version': 'v1', 'created': 'Fri, 4 Aug 2017 11:27:22 GMT'}]
|
2017-08-07
|
[array(['Hoorfar', 'Hamid', ''], dtype=object)
array(['Bagheri', 'Alireza', ''], dtype=object)]
|
3,541 |
1912.06491
|
Peter Mell
|
Peter Mell, Aurelien Delaitre, Frederic de Vaulx, Philippe Dessauw
|
Implementing a Protocol Native Managed Cryptocurrency
|
Published in The Fourteenth International Conference on Software
Engineering Advances (ICSEA) 2019, 8 pages
| null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Previous work presented a theoretical model based on the implicit Bitcoin
specification for how an entity might issue a protocol native cryptocurrency
that mimics features of fiat currencies. Protocol native means that it is built
into the blockchain platform itself and is not simply a token running on
another platform. Novel to this work were mechanisms by which the issuing
entity could manage the cryptocurrency but where their power was limited and
transparency was enforced by the cryptocurrency being implemented using a
publicly mined blockchain. In this work we demonstrate the feasibility of this
theoretical model by implementing such a managed cryptocurrency architecture
through forking the Bitcoin code base. We discovered that the theoretical model
contains several vulnerabilities and security issues that needed to be
mitigated. It also contains architectural features that presented significant
implementation challenges; some aspects of the proposed changes to the Bitcoin
specification were not practical or even workable. In this work we describe how
we mitigated the security vulnerabilities and overcame the architectural
hurdles to build a working prototype.
|
[{'version': 'v1', 'created': 'Fri, 13 Dec 2019 13:54:48 GMT'}]
|
2019-12-16
|
[array(['Mell', 'Peter', ''], dtype=object)
array(['Delaitre', 'Aurelien', ''], dtype=object)
array(['de Vaulx', 'Frederic', ''], dtype=object)
array(['Dessauw', 'Philippe', ''], dtype=object)]
|
3,542 |
0810.1750
|
Shubho Roy
|
David A Lowe, Shubho Roy
|
Holographic description of asymptotically AdS_2 collapse geometries
|
13 pages, 2 figures
|
Phys.Rev.D78:124017,2008
|
10.1103/PhysRevD.78.124017
|
BROWn-HET 1566
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The mapping between bulk supergravity fields in anti-de Sitter space and
operators in the dual boundary conformal field theory usually relies heavily on
the available global symmetries. In the present work, we study a generalization
of this mapping to time dependent situations, for the simple case of collapsing
shock waves in two spacetime dimensions. The construction makes use of
analyticity of the conformal field theory and the properties of the asymptotic
bulk geometry to reconstruct the non-analytic bulk observables. Many of the
features of this construction are expected to apply to higher dimensional
asymptotically anti-de Sitter spacetimes and their conformal field theory
duals.
|
[{'version': 'v1', 'created': 'Thu, 9 Oct 2008 20:24:31 GMT'}]
|
2009-01-01
|
[array(['Lowe', 'David A', ''], dtype=object)
array(['Roy', 'Shubho', ''], dtype=object)]
|
3,543 |
2105.07112
|
Zhong Li
|
Zhong Li, Liangchen Song, Celong Liu, Junsong Yuan, Yi Xu
|
NeuLF: Efficient Novel View Synthesis with Neural 4D Light Field
|
get accepted by EGSR 2022
| null |
10.2312/sr.20221156
| null |
cs.CV cs.GR
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
In this paper, we present an efficient and robust deep learning solution for
novel view synthesis of complex scenes. In our approach, a 3D scene is
represented as a light field, i.e., a set of rays, each of which has a
corresponding color when reaching the image plane. For efficient novel view
rendering, we adopt a two-plane parameterization of the light field, where each
ray is characterized by a 4D parameter. We then formulate the light field as a
4D function that maps 4D coordinates to corresponding color values. We train a
deep fully connected network to optimize this implicit function and memorize
the 3D scene. Then, the scene-specific model is used to synthesize novel views.
Different from previous light field approaches which require dense view
sampling to reliably render novel views, our method can render novel views by
sampling rays and querying the color for each ray from the network directly,
thus enabling high-quality light field rendering with a sparser set of training
images. Per-ray depth can be optionally predicted by the network, thus enabling
applications such as auto refocus. Our novel view synthesis results are
comparable to the state-of-the-arts, and even superior in some challenging
scenes with refraction and reflection. We achieve this while maintaining an
interactive frame rate and a small memory footprint.
|
[{'version': 'v1', 'created': 'Sat, 15 May 2021 01:20:30 GMT'}
{'version': 'v2', 'created': 'Fri, 21 May 2021 11:39:11 GMT'}
{'version': 'v3', 'created': 'Wed, 4 Aug 2021 05:55:54 GMT'}
{'version': 'v4', 'created': 'Fri, 13 Aug 2021 17:52:20 GMT'}
{'version': 'v5', 'created': 'Fri, 3 Dec 2021 09:21:53 GMT'}
{'version': 'v6', 'created': 'Thu, 9 Dec 2021 19:27:43 GMT'}
{'version': 'v7', 'created': 'Thu, 7 Jul 2022 00:33:50 GMT'}]
|
2022-07-08
|
[array(['Li', 'Zhong', ''], dtype=object)
array(['Song', 'Liangchen', ''], dtype=object)
array(['Liu', 'Celong', ''], dtype=object)
array(['Yuan', 'Junsong', ''], dtype=object)
array(['Xu', 'Yi', ''], dtype=object)]
|
3,544 |
1912.04697
|
Xiu-Lei Ren
|
X.-L. Ren, B. B. Malabarba, L.-S. Geng, K. P. Khemchandani, and A.
Martinez Torres
|
Heavy $K^*(4307)$ meson with hidden charm
|
Proceeding Hadron 2019, Guilin, China, 16-21 August 2019
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on a robust prediction of heavy $K^*$ meson by solving the Faddeev
equations with fixed-center approximation for the three-body $KD\bar{D}^*$
system. As the excited Kaon state, $K^*$ is an exotic hidden charm meson with
$M-i\Gamma/2=4307\pm2-i9\pm2$ MeV and $I(J^P)=1/2(1^-)$. We further performed
the evaluation of the decay width of $K^*(4307)$ to the open two-body channels.
We expect that the above findings inspire an experimental investigation of this
exotic $K^*$ meson and to study the so far unexplored heavy strange meson
sector.
|
[{'version': 'v1', 'created': 'Tue, 10 Dec 2019 14:13:54 GMT'}]
|
2019-12-11
|
[array(['Ren', 'X. -L.', ''], dtype=object)
array(['Malabarba', 'B. B.', ''], dtype=object)
array(['Geng', 'L. -S.', ''], dtype=object)
array(['Khemchandani', 'K. P.', ''], dtype=object)
array(['Torres', 'A. Martinez', ''], dtype=object)]
|
3,545 |
0802.2826
|
Pascal Weil
|
Antti Valmari, Petri Lehtinen
|
Efficient Minimization of DFAs with Partial Transition Functions
| null |
Dans Proceedings of the 25th Annual Symposium on the Theoretical
Aspects of Computer Science - STACS 2008, Bordeaux : France (2008)
| null | null |
cs.IT cs.DS math.IT
| null |
Let PT-DFA mean a deterministic finite automaton whose transition relation is
a partial function. We present an algorithm for minimizing a PT-DFA in $O(m \lg
n)$ time and $O(m+n+\alpha)$ memory, where $n$ is the number of states, $m$ is
the number of defined transitions, and $\alpha$ is the size of the alphabet.
Time consumption does not depend on $\alpha$, because the $\alpha$ term arises
from an array that is accessed at random and never initialized. It is not
needed, if transitions are in a suitable order in the input. The algorithm uses
two instances of an array-based data structure for maintaining a refinable
partition. Its operations are all amortized constant time. One instance
represents the classical blocks and the other a partition of transitions. Our
measurements demonstrate the speed advantage of our algorithm on PT-DFAs over
an $O(\alpha n \lg n)$ time, $O(\alpha n)$ memory algorithm.
|
[{'version': 'v1', 'created': 'Wed, 20 Feb 2008 14:04:34 GMT'}]
|
2008-02-21
|
[array(['Valmari', 'Antti', ''], dtype=object)
array(['Lehtinen', 'Petri', ''], dtype=object)]
|
3,546 |
0711.1103
|
Roldao da Rocha
|
Roldao da Rocha, Julio M. Hoff da Silva
|
From Dirac spinor fields to ELKO
|
10 pages
|
J.Math.Phys.48:123517,2007
|
10.1063/1.2825840
| null |
math-ph hep-th math.MP
| null |
Dual-helicity eigenspinors of the charge conjugation operator (ELKO spinor
fields) belong, together with Majorana spinor fields, to a wider class of
spinor fields, the so-called flagpole spinor fields, corresponding to the class
(5), according to Lounesto spinor field classification based on the relations
and values taken by their associated bilinear covariants. There exists only six
such disjoint classes: the first three corresponding to Dirac spinor fields,
and the other three respectively corresponding to flagpole, flag-dipole and
Weyl spinor fields. This paper is devoted to investigate and provide the
necessary and sufficient conditions to map Dirac spinor fields to ELKO, in
order to naturally extend the Standard Model to spinor fields possessing mass
dimension one. As ELKO is a prime candidate to describe dark matter, an
adequate and necessary formalism is introduced and developed here, to better
understand the algebraic, geometric and physical properties of ELKO spinor
fields, and their underlying relationship to Dirac spinor fields.
|
[{'version': 'v1', 'created': 'Wed, 7 Nov 2007 15:28:47 GMT'}]
|
2008-11-26
|
[array(['da Rocha', 'Roldao', ''], dtype=object)
array(['da Silva', 'Julio M. Hoff', ''], dtype=object)]
|
3,547 |
1005.3090
|
Stefan Natu
|
Stefan S. Natu and Erich J. Mueller
|
Domain wall dynamics in a two-component Bose-Mott insulator
|
6 pages, 5 figures Minor typographical errors corrected. Figure
labels changed. Added concluding statements
|
Physical Review A 82, 013612 (2010)
|
10.1103/PhysRevA.82.013612
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We model the dynamics of two species of bosonic atoms trapped in an optical
lattice within the Mott regime by mapping the system onto a spin model. A field
gradient breaks the cloud into two domains. We study how the domain wall
evolves under adiabatic and diabatic changes of this gradient. We determine the
timescales for adiabaticity, and study how temperature evolves for slow ramps.
We show that after large, sudden changes of the field gradient, the system does
not equilibrate on typical experimental timescales. We find interesting spin
dynamics even when the initial temperature is large compared to the
super-exchange energy. We discuss the implication of our results for
experiments wishing to use such a two-component system for thermometry, or as
part of a cooling scheme.
|
[{'version': 'v1', 'created': 'Tue, 18 May 2010 02:33:45 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Jun 2010 15:28:45 GMT'}]
|
2015-03-17
|
[array(['Natu', 'Stefan S.', ''], dtype=object)
array(['Mueller', 'Erich J.', ''], dtype=object)]
|
3,548 |
astro-ph/9905224
|
Amri Wandel
|
A. Wandel (Hebrew Univ. of Jerusalem; UCLA), B.M.Peterson (Ohio State
Univ.), M.A.Malkan (UCLA)
|
Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I.
Comparing the Photoionization and Reverberation Techniques
|
27 pages Latex, 8 figures. Accepted for publication in the
Astrophysical Journal
|
Astrophys.J.526:579,1999
|
10.1086/308017
| null |
astro-ph
| null |
The masses and emission-line region sizes of Active Galactic Nuclei (AGNs)
can be measured by ``reverberation-mapping'' (measuring the lag of the
emission-line luminosity after changes in the continuum). We use tis technique
to calibrate similar size and mass estimates made by photoionization models of
the AGN line-emitting regions. We compile a sample of 19 AGNs with reliable
reverberation and spectroscopy data, twice the number available previously. The
data provide strong evidence that the BLR size and the emission-line width
measure directly the central mass. Two methods are used to estimate the
distance of the broad emission-line region (BLR) from the ionizing source: the
photoionization method (available for many AGNs but has large intrinsic
uncertainties), and the reverberation method (gives very reliable distances,
but available for only a few objects). The distance estimate is combined with
the velocity dispersion, derived from the broad Hb line profile, to estimate
the virial mass. Comparing the central masses calculated with the reverberation
method to those calculated using a photoionization model, we find a highly
significant, nearly linear correlation. This provides a calibration of the
photoionization method on the objects with presently available reverberation
data, which should enable mass estimates for all AGNs with measured Hb line
width. Comparing the BLR sizes given by the two methods also enables us to
estimate the ionizing EUV luminosity which is directly unobservable. We find it
to be typically ten times the visible (monochromatic luminosity at 5100A). The
inferred Eddington ratio of the individual objects in our sample are 0.001-0.03
(visible luminosity) and 0.01-0.3 (ionizing luminosity).
|
[{'version': 'v1', 'created': 'Tue, 18 May 1999 04:09:18 GMT'}]
|
2008-11-26
|
[array(['Wandel', 'A.', '', 'Hebrew Univ. of Jerusalem; UCLA'],
dtype=object)
array(['Peterson', 'B. M.', '', 'Ohio State\n Univ.'], dtype=object)
array(['Malkan', 'M. A.', '', 'UCLA'], dtype=object)]
|
3,549 |
2210.04839
|
Zifan Xu
|
Zifan Xu, Bo Liu, Xuesu Xiao, Anirudh Nair and Peter Stone
|
Benchmarking Reinforcement Learning Techniques for Autonomous Navigation
| null | null | null | null |
cs.RO cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Deep reinforcement learning (RL) has brought many successes for autonomous
robot navigation. However, there still exists important limitations that
prevent real-world use of RL-based navigation systems. For example, most
learning approaches lack safety guarantees; and learned navigation systems may
not generalize well to unseen environments. Despite a variety of recent
learning techniques to tackle these challenges in general, a lack of an
open-source benchmark and reproducible learning methods specifically for
autonomous navigation makes it difficult for roboticists to choose what
learning methods to use for their mobile robots and for learning researchers to
identify current shortcomings of general learning methods for autonomous
navigation. In this paper, we identify four major desiderata of applying deep
RL approaches for autonomous navigation: (D1) reasoning under uncertainty, (D2)
safety, (D3) learning from limited trial-and-error data, and (D4)
generalization to diverse and novel environments. Then, we explore four major
classes of learning techniques with the purpose of achieving one or more of the
four desiderata: memory-based neural network architectures (D1), safe RL (D2),
model-based RL (D2, D3), and domain randomization (D4). By deploying these
learning techniques in a new open-source large-scale navigation benchmark and
real-world environments, we perform a comprehensive study aimed at establishing
to what extent can these techniques achieve these desiderata for RL-based
navigation systems.
|
[{'version': 'v1', 'created': 'Mon, 10 Oct 2022 16:53:42 GMT'}
{'version': 'v2', 'created': 'Tue, 27 Jun 2023 16:17:17 GMT'}]
|
2023-06-28
|
[array(['Xu', 'Zifan', ''], dtype=object)
array(['Liu', 'Bo', ''], dtype=object)
array(['Xiao', 'Xuesu', ''], dtype=object)
array(['Nair', 'Anirudh', ''], dtype=object)
array(['Stone', 'Peter', ''], dtype=object)]
|
3,550 |
2107.08664
|
Tommaso Bruno
|
Tommaso Bruno, Marco M. Peloso, Maria Vallarino
|
Local and nonlocal Poincar\'e inequalities on Lie groups
|
9 pages
| null | null | null |
math.FA math.AP math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a local $L^p$-Poincar\'e inequality, $1\leq p < \infty$, on
noncompact Lie groups endowed with a sub-Riemannian structure. We show that the
constant involved grows at most exponentially with respect to the radius of the
ball, and that if the group is nondoubling, then its growth is indeed, in
general, exponential. We also prove a nonlocal $L^2$-Poincar\'e inequality with
respect to suitable finite measures on the group.
|
[{'version': 'v1', 'created': 'Mon, 19 Jul 2021 07:53:07 GMT'}]
|
2021-07-20
|
[array(['Bruno', 'Tommaso', ''], dtype=object)
array(['Peloso', 'Marco M.', ''], dtype=object)
array(['Vallarino', 'Maria', ''], dtype=object)]
|
3,551 |
2202.10328
|
Valentin Amrhein
|
Valentin Amrhein and Sander Greenland
|
Rewriting results in the language of compatibility
|
In press in Trends in Ecology & Evolution
| null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
This is a reply to Muff, S. et al. (2022) Rewriting results sections in the
language of evidence, Trends in Ecology & Evolution 37, 203-210.
|
[{'version': 'v1', 'created': 'Mon, 21 Feb 2022 15:53:27 GMT'}]
|
2022-02-22
|
[array(['Amrhein', 'Valentin', ''], dtype=object)
array(['Greenland', 'Sander', ''], dtype=object)]
|
3,552 |
1408.4284
|
H. Antia
|
Kuldeep Verma, H. M. Antia, Sarbani Basu, Anwesh Mazumdar
|
A Theoretical Study of Acoustic Glitches in Low-Mass Main-Sequence Stars
|
Accepted for publication in ApJ
| null |
10.1088/0004-637X/794/2/114
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There are regions in stars, such as ionization zones and the interface
between radiative and convective regions, that cause a localized sharp
variation in the sound speed. These are known as "acoustic glitches". Acoustic
glitches leave their signatures on the oscillation frequencies of stars, and
hence these signature can be used as diagnostics of these regions. In
particular, the signature of these glitches can be used as diagnostics of the
position of the second helium ionization zone and that of the base of the
envelope convection zone. With the help of stellar models we study the
properties of these acoustic glitches in main-sequence stars. We find that the
acoustic glitch due to the helium ionization zone does not correspond to the
dip in the adiabatic index \Gamma_1 caused by the ionization of HeII, but to
the peak in \Gamma_1 between the HeI and HeII ionization zones. We find that it
is easiest to study the acoustic glitch due to the helium ionization zone in
stars with masses in the range 0.9--1.2 M_\odot.
|
[{'version': 'v1', 'created': 'Tue, 19 Aug 2014 10:31:14 GMT'}
{'version': 'v2', 'created': 'Wed, 20 Aug 2014 04:06:25 GMT'}]
|
2015-06-22
|
[array(['Verma', 'Kuldeep', ''], dtype=object)
array(['Antia', 'H. M.', ''], dtype=object)
array(['Basu', 'Sarbani', ''], dtype=object)
array(['Mazumdar', 'Anwesh', ''], dtype=object)]
|
3,553 |
1405.2526
|
Arka Bhattacharya
|
Arka Bhattacharya
|
Quadri-allele frequency spectrum in a coalescent topology for mutations
in non-constant population size
|
11 pages, 3 figures
| null | null | null |
math.PR q-bio.QM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The sample frequency spectrum of a segregating site is the probability
distribution of a sample of alleles from a genetic locus, conditional on
observing the sample to have more than one clearly different phenotypes. We
present a model for analyzing quadri-allele frequency spectrum, where the
ancestral population diverged into three populations at a certain divergence
time and the resulting mutations on the branches of the coalescent tree gave
rise to three different derived alleles, which could be observed in the present
generation along with the ancestral allele. The model has been analyzed for
non-constant population size, assuming we had a certain number of extant
lineages at the divergence time and no migration occurs between the
populations.
|
[{'version': 'v1', 'created': 'Sun, 11 May 2014 11:59:00 GMT'}]
|
2014-05-13
|
[array(['Bhattacharya', 'Arka', ''], dtype=object)]
|
3,554 |
1004.1765
|
N Sukumar
|
J. E. Pask, N. Sukumar, S. E. Mousavi
|
Linear scaling solution of the all-electron Coulomb problem in solids
|
23 pages, 17 figures
|
International Journal for Multiscale Computational Engineering 10
(2012) 83-89
| null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a linear scaling formulation for the solution of the all-electron
Coulomb problem in crystalline solids. The resulting method is systematically
improvable and well suited to large-scale quantum mechanical calculations in
which the Coulomb potential and energy of a continuous electronic density and
singular nuclear density are required. Linear scaling is achieved by
introducing smooth, strictly local neutralizing densities to render nuclear
interactions strictly local, and solving the remaining neutral Poisson problem
for the electrons in real space. While the formulation includes singular
nuclear potentials without smearing approximations, the required Poisson
solution is in Sobolev space $H^1$, as required for convergence in the energy
norm. We employ enriched finite elements, with enrichments from isolated atom
solutions, for an efficient solution of the resulting Poisson problem in the
interacting solid. We demonstrate the accuracy and convergence of the approach
by direct comparison to standard Ewald sums for a lattice of point charges, and
demonstrate the accuracy in all-electron quantum mechanical calculations with
an application to crystalline diamond.
|
[{'version': 'v1', 'created': 'Sun, 11 Apr 2010 06:23:03 GMT'}
{'version': 'v2', 'created': 'Sat, 31 Jul 2010 21:32:46 GMT'}
{'version': 'v3', 'created': 'Wed, 10 Aug 2011 19:53:32 GMT'}]
|
2021-11-09
|
[array(['Pask', 'J. E.', ''], dtype=object)
array(['Sukumar', 'N.', ''], dtype=object)
array(['Mousavi', 'S. E.', ''], dtype=object)]
|
3,555 |
2305.06032
|
Kunal Patel
|
K. M. Patel, D. J. Goldie, S. Withington, C. N. Thomas
|
Sensitivity of Transition-Edge Sensors to Strong DC Electric Fields
| null | null |
10.1117/12.2666646
| null |
physics.ins-det astro-ph.IM
|
http://creativecommons.org/licenses/by/4.0/
|
Transition-edge sensors (TESs) have found a wide range of applications in
both space- and land-based astronomical photon measurement and are being used
in the search for dark matter and neutrino mass measurements. A fundamental
aspect of TES physics that has not been investigated is the sensitivity of TESs
to strong DC electric fields (10 kV/m and above). Understanding the resilience
of TESs to DC electric fields is essential when considering their use as
charged particle spectrometers, a field in which TESs could have an enormous
impact. Techniques such as x-ray photoelectron spectroscopy produce a high
number of low-energy electrons that are not of interest and can be screened
from the detector using electrostatic deflection. The use of strong electric
fields could also provide a mass-efficient route to prevent secondary electron
measurements arising from cosmic radiation in space-based TES applications.
Integrating electron optics into the TES membrane provides an elegant and
compact means to control the interaction between charged particles and the
sensor, whether by screening unwanted particles or enhancing the particle
absorption efficiency but implementing such techniques requires understanding
the sensitivity of the TES to the resulting electric fields. In this work, we
applied a uniform DC electric field across a Mo/Au TES using a parallel pair of
flat electrodes positioned above and below the TES. The electric field in the
vicinity of the TES was enhanced by the presence of silicon backing plate
directly beneath the TES. Using this arrangement, we were able to apply of
electric fields up to 90 kV/m across the TES. We observed no electric field
sensitivity at any field strength demonstrating the capability to use TESs in
environments of strong electric fields.
|
[{'version': 'v1', 'created': 'Wed, 10 May 2023 10:33:59 GMT'}]
|
2023-05-29
|
[array(['Patel', 'K. M.', ''], dtype=object)
array(['Goldie', 'D. J.', ''], dtype=object)
array(['Withington', 'S.', ''], dtype=object)
array(['Thomas', 'C. N.', ''], dtype=object)]
|
3,556 |
0907.5162
|
Anya Tafliovich
|
Anya Tafliovich and Eric C. R. Hehner
|
Programming with Quantum Communication
| null | null | null | null |
cs.PL cs.LO quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This work develops a formal framework for specifying, implementing, and
analysing quantum communication protocols. We provide tools for developing
simple proofs and analysing programs which involve communication, both via
quantum channels and exhibiting the LOCC (local operations, classical
communication) paradigm.
|
[{'version': 'v1', 'created': 'Wed, 29 Jul 2009 15:38:02 GMT'}]
|
2009-07-30
|
[array(['Tafliovich', 'Anya', ''], dtype=object)
array(['Hehner', 'Eric C. R.', ''], dtype=object)]
|
3,557 |
astro-ph/0202521
|
Carlos M. Gutierrez
|
C. M. Gutierrez, M. Lopez-Corredoira, F. Prada, M. C. Eliche
|
New light and shadows on Stephan's Quintet
|
Accepted for publication in Astrophys. J
|
Astrophys.J. 579 (2002) 592-599
|
10.1086/342830
| null |
astro-ph
| null |
We present deep broad-band R and narrow-band Halpha images of Stephan's
Quintet. The observations in the R band show that the diffuse halo of the
Stephan's Quintet is larger than previously thought and extends out to NGC
7320C. However, we have not found emission connecting NGC 7331 and NGC 7320 to
R ~ 26.7 mag/arcsec^2 (at more than 3-sigma level), so there is no direct
evidence up to this limiting magnitude of a relation between the peculiar
kinematical structure found in NGC 7331 and an ongoing or past interaction
between this galaxy and NGC 7320. The Halpha emission at high-velocity
(6000-7000 km/s) is distributed in a diffuse structure running NS between NGC
7319 and NGC 7318B and in some other more concentrated features. Some of these
are located in the tidal tails produced by the interaction between the galaxies
of the group. With the Halpha images we have made a two-dimensional velocity
map which helps to identify the origin of each structure detected. This map
does not show features at intermediate velocities between the high- and
low-redshift members of the group. This is in agreement with the standard
scenario in which the apparent proximity of NGC 7320 to the rest of the
galaxies of the Quintet is merely a projection effect. The only point which is
unclear in this interpretation, is an Halpha filament which is seen extending
throughout NGC 7320 with velocity at 6500 km/s instead of the 800 km/s expected
for this galaxy.
|
[{'version': 'v1', 'created': 'Thu, 28 Feb 2002 13:51:08 GMT'}]
|
2009-11-07
|
[array(['Gutierrez', 'C. M.', ''], dtype=object)
array(['Lopez-Corredoira', 'M.', ''], dtype=object)
array(['Prada', 'F.', ''], dtype=object)
array(['Eliche', 'M. C.', ''], dtype=object)]
|
3,558 |
2011.01003
|
J\=anis C\=imurs
|
J\=anis U\v{z}ulis, J\=anis C\={\i}murs
|
The chain length of anisotropic paramagnetic particles in a rotating
field
|
22 pages, 10 figures
| null |
10.1016/j.jmmm.2021.168555
| null |
cond-mat.soft
|
http://creativecommons.org/licenses/by-sa/4.0/
|
In this article, the maximal length of a chain of paramagnetic particles with
magnetic anisotropy in a rotating magnetic field is studied. The theory of
paramagnetic particle chains usually assumes that the particles are
magnetically isotropic and do not rotate in a rotating field. In experiments it
is seen that spherical paramagnetic particles rotate, which can be explained by
small magnetic anisotropy. In this article, the maximal chain length is
calculated for paramagnetic particles with magnetic anisotropy in a rotating
magnetic field. Results show that the maximal chain length as a function of
field frequency has the same trend for isotropic magnetic particles and
particles with magnetic anisotropy if the field frequency is much higher or
much lower than the critical frequency of an individual particle. blue
Initially randomly distributed particles will form chains that will collide and
exchange with particles till they obtain a typical chain length. The typical
chain length of a small cluster is shorter than the maximal chain length of an
isolated chain for the same field frequency. The distribution of chain lengths
in a small cluster of chains is narrower for particles with higher magnetic
anisotropy. Due to the narrower distribution of chain lengths, particles with
magnetic anisotropy can suit better for mass-production. This article will show
how magnetic anisotropy parameters of paramagnetic particles influence chain
length of chains which form in a rotating magnetic field.
|
[{'version': 'v1', 'created': 'Mon, 2 Nov 2020 14:22:34 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Oct 2021 10:11:38 GMT'}]
|
2021-10-06
|
[array(['Užulis', 'Jānis', ''], dtype=object)
array(['C\\=ımurs', 'Jānis', ''], dtype=object)]
|
3,559 |
2003.04611
|
Joachim Schwermer
|
Joachim Schwermer
|
Eisenstein series and the top degree cohomology of arithmetic subgroups
of $SL_n/\mathbb{Q}$
|
27 pages, no figures
| null | null | null |
math.NT math.KT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The cohomology $H^*(\Gamma, E) $ of a torsion-free arithmetic subgroup
$\Gamma$ of the special linear $\mathbb{Q}$-group $\mathsf{G} = SL_n$ may be
interpreted in terms of the automorphic spectrum of $\Gamma$. Within this
framework, there is a decomposition of the cohomology into the cuspidal
cohomology and the Eisenstein cohomology. The latter space is decomposed
according to the classes $\{\mathsf{P}\}$ of associate proper parabolic
$\mathbb{Q}$-subgroups of $\mathsf{G}$. Each summand
$H^*_{\mathrm{\{P\}}}(\Gamma, E)$ is built up by Eisenstein series (or residues
of such) attached to cuspidal automorphic forms on the Levi components of
elements in $\{\mathsf{P}\}$. The cohomology $H^*(\Gamma, E) $ vanishes above
the degree given by the cohomological dimension $\mathrm{cd}(\Gamma) =
\frac{n(n-1)}{2}$. We are concerned with the internal structure of the
cohomology in this top degree. On the one hand, we explicitly describe the
associate classes $\{\mathsf{P}\}$ for which the corresponding summand
$H^{\mathrm{cd}(\Gamma)}_{\mathrm{\{\mathsf{P}\}}}(\Gamma, E)$ vanishes. On the
other hand, in the remaining cases of associate classes we construct various
families of non-vanishing Eisenstein cohomology classes which span
$H^{\mathrm{cd}(\Gamma)}_{\mathrm{\{\mathsf{Q}\}}}(\Gamma, \mathbb{C})$.
Finally, in the case of a principal congruence subgroup $\Gamma(q)$, $q =
p^{\nu} > 5$, $p\geq 3$ a prime, we give lower bounds for the size of these
spaces if not even a precise formula for its dimension for certain associate
classes $\{\mathsf{Q}\}$.
|
[{'version': 'v1', 'created': 'Tue, 10 Mar 2020 09:52:36 GMT'}]
|
2020-03-11
|
[array(['Schwermer', 'Joachim', ''], dtype=object)]
|
3,560 |
math/0109146
|
Jean-Claude Thomas
|
Bitjong Ndombol and Jean-Claude Thomas
|
Steenrod operations and Hochshild homology
|
20 pages
| null | null | null |
math.AT math.AC
| null |
Let $X$ be a simply connected space and ${\Bbb F}_p$ be a prime field. The
algebra of normalized singular cochains $N^*(X; {\Bbb F}_p)$ admits a natural
homotopy structure which induces natural Steenrod operations on the Hochschild
homology $HH_* N^*(X;{\Bbb F}_p)$ of the space $X$. The primary purpose of this
paper is to prove that the J. Jones isomorphism $HH_*N^*(X;{\Bbb F}_p) \cong H
^*(X^{S^1};{\Bbb F}_p)$ identifies theses Stenrood operations with those
defined on the cohomology of the free loop space with coefficients in ${\Bbb
F}_p$. The other goal of this paper is to describe a theoritic model which
allows to do some computations.
|
[{'version': 'v1', 'created': 'Thu, 20 Sep 2001 16:06:42 GMT'}]
|
2007-05-23
|
[array(['Ndombol', 'Bitjong', ''], dtype=object)
array(['Thomas', 'Jean-Claude', ''], dtype=object)]
|
3,561 |
1705.09915
|
Habib Rostami
|
Habib Rostami and Marco Polini
|
Nonlinear anomalous photocurrents in Weyl semimetals
|
14 pages, 2 figures, Published in Physical Review B
|
Phys. Rev. B 97, 195151 (2018)
|
10.1103/PhysRevB.97.195151
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the second-order nonlinear optical response of a Weyl semimetal
(WSM), i.e. a three-dimensional metal with linear band touchings acting as
point-like sources of Berry curvature in momentum space, termed "Weyl-Berry
monopoles". We first show that the anomalous second-order photocurrent of WSMs
can be elegantly parametrized in terms of Weyl-Berry dipole and quadrupole
moments. We then calculate the corresponding charge and node conductivities of
WSMs with either broken time-reversal invariance or inversion symmetry. In
particular, we predict a universal dissipationless second-order anomalous node
conductivity for WSMs belonging to the TaAs family.
|
[{'version': 'v1', 'created': 'Sun, 28 May 2017 09:18:24 GMT'}
{'version': 'v2', 'created': 'Sat, 26 May 2018 09:07:16 GMT'}]
|
2018-05-29
|
[array(['Rostami', 'Habib', ''], dtype=object)
array(['Polini', 'Marco', ''], dtype=object)]
|
3,562 |
1904.05680
|
Juan Pablo Dehollain
|
Juan P. Dehollain, Uditendu Mukhopadhyay, Vincent P. Michal, Yao Wang,
Bernhard Wunsch, Christian Reichl, Werner Wegscheider, Mark S. Rudner, Eugene
Demler, Lieven M. K. Vandersypen
|
Nagaoka ferromagnetism observed in a quantum dot plaquette
|
This version: main (8 pages, 6 figures) + supplementary (15 pages, 8
figures)
| null |
10.1038/s41586-020-2051-0
| null |
cond-mat.mes-hall quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Engineered, highly-controllable quantum systems hold promise as simulators of
emergent physics beyond the capabilities of classical computers. An important
problem in many-body physics is itinerant magnetism, which originates purely
from long-range interactions of free electrons and whose existence in real
systems has been subject to debate for decades. Here we use a quantum simulator
consisting of a four-site square plaquette of quantum dots to demonstrate
Nagaoka ferromagnetism. This form of itinerant magnetism has been rigorously
studied theoretically but has remained unattainable in experiment. We load the
plaquette with three electrons and demonstrate the predicted emergence of
spontaneous ferromagnetic correlations through pairwise measurements of spin.
We find the ferromagnetic ground state is remarkably robust to engineered
disorder in the on-site potentials and can induce a transition to the low-spin
state by changing the plaquette topology to an open chain. This demonstration
of Nagaoka ferromagnetism highlights that quantum simulators can be used to
study physical phenomena that have not yet been observed in any system before.
The work also constitutes an important step towards large-scale quantum dot
simulators of correlated electron systems.
|
[{'version': 'v1', 'created': 'Thu, 11 Apr 2019 13:21:59 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Apr 2019 04:21:39 GMT'}
{'version': 'v3', 'created': 'Thu, 5 Mar 2020 03:25:46 GMT'}]
|
2020-03-06
|
[array(['Dehollain', 'Juan P.', ''], dtype=object)
array(['Mukhopadhyay', 'Uditendu', ''], dtype=object)
array(['Michal', 'Vincent P.', ''], dtype=object)
array(['Wang', 'Yao', ''], dtype=object)
array(['Wunsch', 'Bernhard', ''], dtype=object)
array(['Reichl', 'Christian', ''], dtype=object)
array(['Wegscheider', 'Werner', ''], dtype=object)
array(['Rudner', 'Mark S.', ''], dtype=object)
array(['Demler', 'Eugene', ''], dtype=object)
array(['Vandersypen', 'Lieven M. K.', ''], dtype=object)]
|
3,563 |
0906.0617
|
Madjid Eshaghi Gordji
|
A. Ebadian and Sh. Najafzadeh
|
Stability of the Jensen--type functional equation in ternary Banach
algebras: An alternative fixed point approach
|
10 pages
| null | null | null |
math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using fixed point methods, we prove the generalized Hyers--Ulam--Rassias
stability of ternary homomorphisms, and ternary multipliers in ternary Banach
algebras for the Jensen--type functional equation
$$f(\frac{x+y+z}{3})+f(\frac{x-2y+z}{3})+f(\frac{x+y-2z}{3})= f(x).$$
|
[{'version': 'v1', 'created': 'Tue, 2 Jun 2009 22:44:22 GMT'}
{'version': 'v2', 'created': 'Thu, 3 Sep 2009 00:09:07 GMT'}
{'version': 'v3', 'created': 'Sun, 20 Dec 2009 08:02:59 GMT'}]
|
2009-12-21
|
[array(['Ebadian', 'A.', ''], dtype=object)
array(['Najafzadeh', 'Sh.', ''], dtype=object)]
|
3,564 |
0903.4637
|
Karoly Bezdek
|
Karoly Bezdek
|
Tarski's plank problem revisited
| null |
Bolyai Society Mathematical Studies 24. Berlin: Springer (2013)
45-64
| null | null |
math.MG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the 1930's, Tarski introduced his plank problem at a time when the field
Discrete Geometry was about to born. It is quite remarkable that Tarski's
question and its variants continue to generate interest in the geometric and
analytic aspects of coverings by planks in the present time as well. The paper
is a survey type with a list of open research problems.
|
[{'version': 'v1', 'created': 'Thu, 26 Mar 2009 17:04:01 GMT'}]
|
2014-09-12
|
[array(['Bezdek', 'Karoly', ''], dtype=object)]
|
3,565 |
1412.5790
|
Christopher Rennick
|
J. Lam, C. J. Rennick, and T. P. Softley
|
Collisional trap losses of cold, magnetically-trapped Br atoms
| null |
Phys. Rev. A 90, 063419 (2014)
|
10.1103/PhysRevA.90.063419
| null |
physics.atom-ph physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Near-threshold photodissociation of Br$_2$ from a supersonic beam produces
slow bromine atoms that are trapped in the magnetic field minimum formed
between two opposing permanent magnets. Here, we quantify the dominant trap
loss rate due to collisions with two sources of residual gas: the background
limited by the vacuum chamber base pressure, and the carrier gas during the
supersonic gas pulse. The loss rate due to collisions with residual Ar in the
background follows pseudo first-order kinetics, and the bimolecular rate
coefficient for collisional loss from the trap is determined by measurement of
this rate as a function of the background Ar pressure. This rate coefficient is
smaller than the total elastic collision rate coefficient, as it only samples
those collisions that lead to trap loss, and is determined to be
$\langle\nu\sigma\rangle = (1.12\pm0.09)\times10^{-9}\,\text{cm}^3\,
\text{s}^{-1}$. The calculated differential cross section can be used with this
value to estimate a trap depth of $293\pm24\,\text{mK}$. Carrier gas collisions
occur only during the tail of the supersonic beam pulse. Using the differential
cross section verified by the background-gas collision measurements provides an
estimate of the peak molecular beam density of
$(3.0\pm0.3)\times10^{13}\,\text{cm}^{-3}$ in good agreement with the
prediction of a simple supersonic expansion model. Finally, we estimate the
trap loss rate due to Majorana transitions to be negligible, owing to the
relatively large trapped-atom phase-space volume.
|
[{'version': 'v1', 'created': 'Thu, 18 Dec 2014 10:24:30 GMT'}]
|
2014-12-19
|
[array(['Lam', 'J.', ''], dtype=object)
array(['Rennick', 'C. J.', ''], dtype=object)
array(['Softley', 'T. P.', ''], dtype=object)]
|
3,566 |
1612.04202
|
Guang-You Qin
|
Lin Chen, Guang-You Qin, Shu-Yi Wei, Bo-Wen Xiao, Han-Zhong Zhang
|
Dijet Asymmetry in the Resummation Improved Perturbative QCD Approach
|
5 pages, 4 figures
| null |
10.1016/j.physletb.2018.06.002
| null |
hep-ph nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop the first systematic theoretical approach to dijet asymmetries in
hadron-hadron collisions based on the perturbative QCD (pQCD) expansion and the
Sudakov resummation formalism. We find that the pQCD calculation at
next-to-leading order is indispensable to describe the experimental data, while
the Sudakov resummation formalism is vital near the end points where the pQCD
expansion fails to converge due to the appearance of large Sudakov logarithms.
Utilizing our resummation improved pQCD approach, we obtain good agreement with
the most up-to-date fully corrected ATLAS data on dijet asymmetry in $pp$
collisions. Combining with the BDMPS jet energy loss formalism, we extract the
value of jet transport coefficient $\hat{q}_0 \sim
2$-$6~\textrm{GeV}^2/\textrm{fm}$ for the quark-gluon-plasma created in $PbPb$
collisions at 2.76A TeV. This work paves the way for a more complete and deeper
understanding of the properties of strongly-coupled QCD medium via the studies
of dijet asymmetries in relativistic heavy-ion collisions.
|
[{'version': 'v1', 'created': 'Tue, 13 Dec 2016 14:30:56 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Dec 2016 08:06:48 GMT'}]
|
2018-06-13
|
[array(['Chen', 'Lin', ''], dtype=object)
array(['Qin', 'Guang-You', ''], dtype=object)
array(['Wei', 'Shu-Yi', ''], dtype=object)
array(['Xiao', 'Bo-Wen', ''], dtype=object)
array(['Zhang', 'Han-Zhong', ''], dtype=object)]
|
3,567 |
1407.2743
|
Pavel Plotnikov I
|
P. I. Plotnikov, W. Weigant
|
Isothermal Navier-Stokes Equations and Radon Transform
|
39 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the paper we prove the existence results for initial-value boundary value
problems for compressible isothermal Navier-Stokes equations. We restrict
ourselves to 2D case of a problem with no-slip condition for nonstationary
motion of viscous compressible isothermal fluid. However, the technique of
modeling and analysis presented here is general and can be used for 3D
problems.
|
[{'version': 'v1', 'created': 'Thu, 10 Jul 2014 10:25:47 GMT'}]
|
2014-07-11
|
[array(['Plotnikov', 'P. I.', ''], dtype=object)
array(['Weigant', 'W.', ''], dtype=object)]
|
3,568 |
cond-mat/0610045
|
J\"orn Dunkel
|
J\"orn Dunkel, Peter Talkner, Peter H\"anggi
|
Relative entropy, Haar measures and relativistic canonical velocity
distributions
|
15 pages: extended version, references added
|
NewJ.Phys.9:144,2007
|
10.1088/1367-2630/9/5/144
| null |
cond-mat.stat-mech astro-ph math-ph math.MP
| null |
The thermodynamic maximum principle for the Boltzmann-Gibbs-Shannon (BGS)
entropy is reconsidered by combining elements from group and measure theory.
Our analysis starts by noting that the BGS entropy is a special case of
relative entropy. The latter characterizes probability distributions with
respect to a pre-specified reference measure. To identify the canonical BGS
entropy with a relative entropy is appealing for two reasons: (i) the maximum
entropy principle assumes a coordinate invariant form; (ii) thermodynamic
equilibrium distributions, which are obtained as solutions of the maximum
entropy problem, may be characterized in terms of the transformation properties
of the underlying reference measure (e.g., invariance under group
transformations). As examples, we analyze two frequently considered candidates
for the one-particle equilibrium velocity distribution of an ideal gas of
relativistic particles. It becomes evident that the standard J\"uttner
distribution is related to the (additive) translation group on momentum space.
Alternatively, imposing Lorentz invariance of the reference measure leads to a
so-called modified J\"uttner function, which differs from the standard
J\"uttner distribution by a prefactor, proportional to the inverse particle
energy.
|
[{'version': 'v1', 'created': 'Mon, 2 Oct 2006 16:21:56 GMT'}
{'version': 'v2', 'created': 'Tue, 21 Nov 2006 13:48:43 GMT'}
{'version': 'v3', 'created': 'Fri, 9 Mar 2007 13:57:08 GMT'}]
|
2008-11-26
|
[array(['Dunkel', 'Jörn', ''], dtype=object)
array(['Talkner', 'Peter', ''], dtype=object)
array(['Hänggi', 'Peter', ''], dtype=object)]
|
3,569 |
1107.0131
|
Yu-Gang Ma
|
Chun-Wang Ma, Fang Wang, Yu-Gang Ma, Chan Jin
|
Isobaric yield ratios in heavy-ion reactions, and symmetry energy of
neutron-rich nuclei at intermediate energies
|
12 pages, 6 figures
|
Phys.Rev.C83:064620,2011
|
10.1103/PhysRevC.83.064620
| null |
nucl-th nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The isobaric yield ratios of the fragments produced in the neutron-rich 48Ca
and 64Ni projectile fragmentation are analyzed in the framework of a modified
Fisher model. The correlations between the isobaric yield ratios (R) and the
energy coefficients in the Weisz\"acker-Beth semiclassical mass formula (the
symmetry-energy term asym, the Coulomb-energy term ac, and the pairing-energy
term ap) and the difference between the chemical potentials of the neutron and
proton ({\mu}n-{\mu}p) are investigated. Simple correlations between
({\mu}n-{\mu}p)/T, ac/T, asym/T, and ap/T (where T is the temperature), and lnR
are obtained. It is suggested that ({\mu}n-{\mu}p)/T, ac/T, asym/T, and ap/T of
neutron-rich nuclei can be extracted using isobaric yield ratios for heavy-ion
collisions at intermediate energies.
|
[{'version': 'v1', 'created': 'Fri, 1 Jul 2011 07:52:25 GMT'}]
|
2011-08-03
|
[array(['Ma', 'Chun-Wang', ''], dtype=object)
array(['Wang', 'Fang', ''], dtype=object)
array(['Ma', 'Yu-Gang', ''], dtype=object)
array(['Jin', 'Chan', ''], dtype=object)]
|
3,570 |
2106.09175
|
Renato Calleja
|
Renato Calleja, Alessandra Celletti, Joan Gimeno, Rafael de la Llave
|
Efficient and accurate KAM tori construction for the dissipative
spin-orbit problem using a map reduction
|
37 pages, 6 figures
| null |
10.1007/s00332-021-09767-5
| null |
math.NA cs.NA math.DS nlin.CD
|
http://creativecommons.org/licenses/by/4.0/
|
We consider the dissipative spin-orbit problem in Celestial Mechanics, which
describes the rotational motion of a triaxial satellite moving on a Keplerian
orbit subject to tidal forcing and "drift".
Our goal is to construct quasi-periodic solutions with fixed frequency,
satisfying appropriate conditions.
With the goal of applying rigorous KAM theory, we compute such quasi-periodic
solution with very high precision. To this end, we have developed a very
efficient algorithm. The first step is to compute very accurately the return
map to a surface of section (using a high order Taylor's method with extended
precision). Then, we find an invariant curve for the return map using recent
algorithms that take advantage of the geometric features of the problem. This
method is based on a rapidly convergent Newton's method which is guaranteed to
converge if the initial error is small enough. So, it is very suitable for a
continuation algorithm.
The resulting algorithm is quite efficient. We only need to deal with a one
dimensional function. If this function is discretized in $N$ points, the
algorithm requires $O(N \log N) $ operations and $O(N) $ storage. The most
costly step (the numerical integration of the equation along a turn) is trivial
to parallelize.
The main goal of the paper is to present the algorithms, implementation
details and several sample results of runs.
We also present both a rigorous and a numerical comparison of the results of
averaged and not averaged models.
|
[{'version': 'v1', 'created': 'Wed, 16 Jun 2021 23:34:23 GMT'}]
|
2021-12-22
|
[array(['Calleja', 'Renato', ''], dtype=object)
array(['Celletti', 'Alessandra', ''], dtype=object)
array(['Gimeno', 'Joan', ''], dtype=object)
array(['de la Llave', 'Rafael', ''], dtype=object)]
|
3,571 |
2305.14922
|
Antonio Di Francesco
|
Matteo Colangeli, Antonio Di Francesco, Lamberto Rondoni
|
Finite reservoirs and irreversibility corrections to Hamiltonian systems
statistics
| null | null | null | null |
cond-mat.stat-mech math-ph math.MP
|
http://creativecommons.org/licenses/by/4.0/
|
We consider several Hamiltonian systems perturbed by external agents, that
preserve their Hamiltonian structure. We investigate the corrections to the
canonical statistics resulting from coupling such systems with possibly large
but finite reservoirs, and from the onset of processes breaking the time
reversal symmetry. We analyze exactly solvable oscillators systems, and perform
simulations of relatively more complex ones. This indicates that the standard
statistical mechanical formalism needs to be adjusted, in the ever more
investigated nano-scale science and technology. In particular, the hypothesis
that heat reservoirs be considered infinite and be described by the classical
ensembles is found to be critical when exponential quantities are considered,
since the large size limit may not coincide with the infinite size canonical
result. Furthermore, process-dependent emergent irreversibility affects
ensemble averages, effectively frustrating, on a statistical level, the time
reversal invariance of Hamiltonian dynamics, that is used to obtain numerous
results.
|
[{'version': 'v1', 'created': 'Wed, 24 May 2023 09:09:13 GMT'}]
|
2023-05-25
|
[array(['Colangeli', 'Matteo', ''], dtype=object)
array(['Di Francesco', 'Antonio', ''], dtype=object)
array(['Rondoni', 'Lamberto', ''], dtype=object)]
|
3,572 |
nlin/0302061
|
Francesco Toppan
|
Z. Popowicz and F. Toppan
|
The N=2 Supersymmetric Heavenly Equation and Its Super-Hydrodynamical
Reduction
|
10 pages, LaTex
|
J.Phys. A36 (2003) 9701-9710
|
10.1088/0305-4470/36/37/308
|
CBPF-NF-003/03
|
nlin.SI hep-th
| null |
Manifest N=2 supersymmetric Toda systems are constructed from the $sl(n,n+1)$
superalgebras by taking into account their complex structure. In the $n\to
\infty$ continuum limit an N=2 extension of the $(2+1)$-dimensional heavenly
equation is obtained. The integrability is guaranteed by the existence of a
supersymmetric Lax pair. We further analyze the properties of the
$(1+1)$-dimensionally reduced system. Its bosonic sector is of hydrodynamical
type. This is not the case for the whole supersymmetric system which, however,
is super-hydrodynamical when properly expressed in terms of a supergeometry
involving superfields and fermionic derivatives.
|
[{'version': 'v1', 'created': 'Thu, 27 Feb 2003 22:10:01 GMT'}]
|
2009-11-10
|
[array(['Popowicz', 'Z.', ''], dtype=object)
array(['Toppan', 'F.', ''], dtype=object)]
|
3,573 |
2012.00454
|
Bing-Dong Wan
|
Bing-Dong Wan and Cong-Feng Qiao
|
Gluonic Tetracharm Configuration of $X(6900)$
|
14 pages, 4 figures, published in PLB
| null |
10.1016/j.physletb.2021.136339
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Recently, a new hadronic structure at around $6.9$ GeV was observed in an
LHCb experiment. From its limited yet known decay mode, one could still
determine that it contains at least four charm quarks and hence belongs to the
category of exotic state. This finding indicates for the first time the
tetracharm exotic states and is therefore quite importance. In this letter, we
propose a nature hybrid interpretation for the structure of $X(6900)$, i.e. in
$[\bar{3}_c]_{c c}\otimes[8_c]_{G}\otimes[3_c]_{\bar{c} \bar{c}}$ configuration
with $J^{PC}=0^{++}$, and by using the QCD Sum Rule technique we performed mass
spectrum calculation. The results showed that the observed $X(6900)$ could be a
gluonic tetracharm state, and some other structures may exist, e.g., one around
$7.2$ GeV in the tetracharm hybrid configuration and with $J^{PC}=0^{-+}$. We
also predict the tetrabottom hybrid states, leaving for future experiment.
|
[{'version': 'v1', 'created': 'Tue, 1 Dec 2020 13:02:57 GMT'}
{'version': 'v2', 'created': 'Wed, 12 May 2021 07:25:52 GMT'}]
|
2021-05-13
|
[array(['Wan', 'Bing-Dong', ''], dtype=object)
array(['Qiao', 'Cong-Feng', ''], dtype=object)]
|
3,574 |
1509.07699
|
Lei Wu
|
Lei Wu
|
Diffusive Limit with Geometric Correction of Unsteady Neutron Transport
Equation
|
34 pages. arXiv admin note: substantial text overlap with
arXiv:1404.2583
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the diffusive limit of an unsteady neutron transport equation in
a two-dimensional plate with one-speed velocity. We show the solution can be
approximated by the sum of interior solution, initial layer, and boundary layer
with geometric correction. Also, we construct a counterexample to the classical
theory in \cite{Bensoussan.Lions.Papanicolaou1979} which states the behavior of
solution near boundary can be described by the Knudsen layer derived from the
Milne problem.
|
[{'version': 'v1', 'created': 'Fri, 25 Sep 2015 12:45:03 GMT'}
{'version': 'v2', 'created': 'Tue, 15 Mar 2016 15:45:34 GMT'}
{'version': 'v3', 'created': 'Thu, 5 May 2016 18:17:00 GMT'}]
|
2016-05-06
|
[array(['Wu', 'Lei', ''], dtype=object)]
|
3,575 |
1001.1737
|
Benjamin Moster
|
Benjamin P. Moster, Rachel S. Somerville, Jeffrey A. Newman,
Hans-Walter Rix
|
A Cosmic Variance Cookbook
|
8 pages, 4 figures, 5 tables, submitted to ApJ
| null |
10.1088/0004-637X/731/2/113
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep pencil beam surveys (<1 deg^2) are of fundamental importance for
studying the high-redshift universe. However, inferences about galaxy
population properties are in practice limited by 'cosmic variance'. This is the
uncertainty in observational estimates of the number density of galaxies
arising from the underlying large-scale density fluctuations. This source of
uncertainty can be significant, especially for surveys which cover only small
areas and for massive high-redshift galaxies. Cosmic variance for a given
galaxy population can be determined using predictions from cold dark matter
theory and the galaxy bias. In this paper we provide tools for experiment
design and interpretation. For a given survey geometry we present the cosmic
variance of dark matter as a function of mean redshift z and redshift bin size
Dz. Using a halo occupation model to predict galaxy clustering, we derive the
galaxy bias as a function of mean redshift for galaxy samples of a given
stellar mass range. In the linear regime, the cosmic variance of these galaxy
samples is the product of the galaxy bias and the dark matter cosmic variance.
We present a simple recipe using a fitting function to compute cosmic variance
as a function of the angular dimensions of the field, z, Dz and stellar mass
m*. We also provide tabulated values and a software tool. We find that for
GOODS at z=2 and with Dz=0.5 the relative cosmic variance of galaxies with
m*>10^11 Msun is ~38%, while it is ~27% for GEMS and ~12% for COSMOS. For
galaxies of m*~10^10 Msun the relative cosmic variance is ~19% for GOODS, ~13%
for GEMS and ~6% for COSMOS. This implies that cosmic variance is a significant
source of uncertainty at z=2 for small fields and massive galaxies, while for
larger fields and intermediate mass galaxies cosmic variance is less serious.
|
[{'version': 'v1', 'created': 'Mon, 11 Jan 2010 21:20:39 GMT'}]
|
2015-05-14
|
[array(['Moster', 'Benjamin P.', ''], dtype=object)
array(['Somerville', 'Rachel S.', ''], dtype=object)
array(['Newman', 'Jeffrey A.', ''], dtype=object)
array(['Rix', 'Hans-Walter', ''], dtype=object)]
|
3,576 |
1704.03449
|
Johannes Broedel
|
Johannes Broedel, Nils Matthes, Gregor Richter, Oliver Schlotterer
|
Twisted elliptic multiple zeta values and non-planar one-loop
open-string amplitudes
|
28 + 19 pages, 6 figures, v2: explanations added, published version
|
J.Phys. A51 (2018) no.28, 285401
|
10.1088/1751-8121/aac601
|
HU-EP-17/11, HU-Mathematik-2017-2
|
hep-th math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a generalization of elliptic multiple zeta values, which we call
twisted elliptic multiple zeta values. These arise as iterated integrals on an
elliptic curve from which a rational lattice has been removed. At the cusp,
twisted elliptic multiple zeta values are shown to degenerate to cyclotomic
multiple zeta values in the same way as elliptic multiple zeta values
degenerate to classical multiple zeta values. We investigate properties of
twisted elliptic multiple zeta values and consider them in the context of the
non-planar part of the four-point one-loop open-string amplitude.
|
[{'version': 'v1', 'created': 'Tue, 11 Apr 2017 17:54:15 GMT'}
{'version': 'v2', 'created': 'Sun, 24 Jun 2018 12:43:59 GMT'}]
|
2018-06-26
|
[array(['Broedel', 'Johannes', ''], dtype=object)
array(['Matthes', 'Nils', ''], dtype=object)
array(['Richter', 'Gregor', ''], dtype=object)
array(['Schlotterer', 'Oliver', ''], dtype=object)]
|
3,577 |
1412.3844
|
Gayane Karapetyan
|
N. A. Demekhina, G. S. Karapetyan, A. R. Balabekyan
|
Complete and incomplete fusion competition in 11B-induced fission
reaction on medium mass targets at intermediate energies
|
13 pages, 3 figures, 1 table
| null |
10.1142/9789814699464_0014
| null |
nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The cross sections for the binary fission of 197Au, 181Ta and 209Bi targets
induced by 11B ions were measured at intermediate energies. The fission
products cross sections were studied by means of activation analysis in
off-line regime observed gamma-ray spectra. The fission cross section is
reconstructed on the basis of charge and mass distribution of the fission
products.
|
[{'version': 'v1', 'created': 'Thu, 11 Dec 2014 22:24:58 GMT'}
{'version': 'v2', 'created': 'Mon, 22 Dec 2014 18:13:14 GMT'}]
|
2015-09-02
|
[array(['Demekhina', 'N. A.', ''], dtype=object)
array(['Karapetyan', 'G. S.', ''], dtype=object)
array(['Balabekyan', 'A. R.', ''], dtype=object)]
|
3,578 |
2005.12095
|
David Rottensteiner
|
David Rottensteiner and Michael Ruzhansky
|
The Harmonic Oscillator on the Heisenberg Group
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this note we present a notion of harmonic oscillator on the Heisenberg
group $\mathbf{H}_n$ which forms the natural analogue of the harmonic
oscillator on $\mathbb{R}^n$ under a few reasonable assumptions: the harmonic
oscillator on $\mathbf{H}_n$ should be a negative sum of squares of operators
related to the sub-Laplacian on $\mathbf{H}_n$, essentially self-adjoint with
purely discrete spectrum, and its eigenvectors should be smooth functions and
form an orthonormal basis of $L^2(\mathbf{H}_n)$. This approach leads to a
differential operator on $\mathbf{H}_n$ which is determined by the (stratified)
Dynin-Folland Lie algebra. We provide an explicit expression for the operator
as well as an asymptotic estimate for its eigenvalues.
|
[{'version': 'v1', 'created': 'Mon, 25 May 2020 13:18:14 GMT'}]
|
2020-05-26
|
[array(['Rottensteiner', 'David', ''], dtype=object)
array(['Ruzhansky', 'Michael', ''], dtype=object)]
|
3,579 |
0902.1825
|
Mikhail Krivoruchenko
|
M. I. Krivoruchenko, F. Simkovic, Amand Faessler
|
Constraints for weakly interacting light bosons from existence of
massive neutron stars
|
5 pages REVTeX, 2 pdf figures
|
Phys.Rev.D79:125023,2009
|
10.1103/PhysRevD.79.125023
| null |
hep-ph astro-ph.SR nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Theories beyond the standard model include a number of new particles some of
which might be light and weakly coupled to ordinary matter. Such particles
affect equation of state of nuclear matter and can shift admissible masses of
neutron stars to higher values. The internal structure of neutron stars is
modified provided the ratio between coupling strength and mass squared of a
weakly interacting light boson is above $g^2/\mu^2 \sim 25 ~\mathrm{GeV}^{-2}$.
We provide limits on the couplings with the strange sector, which cannot be
achieved from laboratory experiments analysis. When the couplings to the first
family of quarks is considered the limits imposed by the neutron stars are not
more stringent than the existing laboratory ones. The observations on neutron
stars give evidence that equation of state of the $\beta$-equilibrated nuclear
matter is stiffer than expected from many-body theory of nuclei and nuclear
matter. A weakly interacting light vector boson coupled predominantly to the
second family of the quarks can produce the required stiffening.
|
[{'version': 'v1', 'created': 'Wed, 11 Feb 2009 14:26:12 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Jul 2009 11:38:41 GMT'}]
|
2010-04-23
|
[array(['Krivoruchenko', 'M. I.', ''], dtype=object)
array(['Simkovic', 'F.', ''], dtype=object)
array(['Faessler', 'Amand', ''], dtype=object)]
|
3,580 |
2106.07754
|
Daniele Regoli
|
Riccardo Crupi, Alessandro Castelnovo, Daniele Regoli, Beatriz San
Miguel Gonzalez
|
Counterfactual Explanations as Interventions in Latent Space
|
34 pages, 4 figures, 4 tables
| null | null | null |
cs.AI cs.CY cs.LG stat.ML
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Explainable Artificial Intelligence (XAI) is a set of techniques that allows
the understanding of both technical and non-technical aspects of Artificial
Intelligence (AI) systems. XAI is crucial to help satisfying the increasingly
important demand of \emph{trustworthy} Artificial Intelligence, characterized
by fundamental characteristics such as respect of human autonomy, prevention of
harm, transparency, accountability, etc. Within XAI techniques, counterfactual
explanations aim to provide to end users a set of features (and their
corresponding values) that need to be changed in order to achieve a desired
outcome. Current approaches rarely take into account the feasibility of actions
needed to achieve the proposed explanations, and in particular they fall short
of considering the causal impact of such actions. In this paper, we present
Counterfactual Explanations as Interventions in Latent Space (CEILS), a
methodology to generate counterfactual explanations capturing by design the
underlying causal relations from the data, and at the same time to provide
feasible recommendations to reach the proposed profile. Moreover, our
methodology has the advantage that it can be set on top of existing
counterfactuals generator algorithms, thus minimising the complexity of
imposing additional causal constrains. We demonstrate the effectiveness of our
approach with a set of different experiments using synthetic and real datasets
(including a proprietary dataset of the financial domain).
|
[{'version': 'v1', 'created': 'Mon, 14 Jun 2021 20:48:48 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Nov 2021 14:48:37 GMT'}]
|
2021-11-09
|
[array(['Crupi', 'Riccardo', ''], dtype=object)
array(['Castelnovo', 'Alessandro', ''], dtype=object)
array(['Regoli', 'Daniele', ''], dtype=object)
array(['Gonzalez', 'Beatriz San Miguel', ''], dtype=object)]
|
3,581 |
1205.2158
|
Prado Martin-Moruno
|
Valentina Baccetti (Victoria University of Wellington), Prado
Martin-Moruno (Victoria University of Wellington), and Matt Visser (Victoria
University of Wellington)
|
Massive gravity from bimetric gravity
|
v1: 25 pages; v2: 6 references added, discussion streamlined; v3: 24
pages, 20 references added, section 2 summarized, new comments added to
section 3, conclusions improved but unchanged. This version accepted for
publication in Classical and Quantum Gravity
|
Class. Quantum Grav. 30 (2013) 015004
|
10.1088/0264-9381/30/1/015004
| null |
gr-qc astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the subtle relationship between massive gravity and bimetric
gravity, focusing particularly on the manner in which massive gravity may be
viewed as a suitable limit of bimetric gravity. The limiting procedure is more
delicate than currently appreciated. Specifically, this limiting procedure
should not unnecessarily constrain the background metric, which must be
externally specified by the theory of massive gravity itself. The fact that in
bimetric theories one always has two sets of metric equations of motion
continues to have an effect even in the massive gravity limit, leading to
additional constraints besides the one set of equations of motion naively
expected. Thus, since solutions of bimetric gravity in the limit of vanishing
kinetic term are also solutions of massive gravity, but the contrary statement
is not necessarily true, there is not complete continuity in the parameter
space of the theory. In particular, we study the massive cosmological solutions
which are continuous in the parameter space, showing that many interesting
cosmologies belong to this class.
|
[{'version': 'v1', 'created': 'Thu, 10 May 2012 04:53:39 GMT'}
{'version': 'v2', 'created': 'Tue, 15 May 2012 22:33:52 GMT'}
{'version': 'v3', 'created': 'Sun, 11 Nov 2012 21:37:49 GMT'}]
|
2012-12-06
|
[array(['Baccetti', 'Valentina', '', 'Victoria University of Wellington'],
dtype=object)
array(['Martin-Moruno', 'Prado', '', 'Victoria University of Wellington'],
dtype=object)
array(['Visser', 'Matt', '', 'Victoria\n University of Wellington'],
dtype=object) ]
|
3,582 |
1707.02171
|
Emilija Perkovi\'c
|
Emilija Perkovi\'c, Markus Kalisch, Maloes H. Maathuis
|
Interpreting and using CPDAGs with background knowledge
|
17 pages, 6 figures, UAI 2017
| null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop terminology and methods for working with maximally oriented
partially directed acyclic graphs (maximal PDAGs). Maximal PDAGs arise from
imposing restrictions on a Markov equivalence class of directed acyclic graphs,
or equivalently on its graphical representation as a completed partially
directed acyclic graph (CPDAG), for example when adding background knowledge
about certain edge orientations. Although maximal PDAGs often arise in
practice, causal methods have been mostly developed for CPDAGs. In this paper,
we extend such methodology to maximal PDAGs. In particular, we develop
methodology to read off possible ancestral relationships, we introduce a
graphical criterion for covariate adjustment to estimate total causal effects,
and we adapt the IDA and joint-IDA frameworks to estimate multi-sets of
possible causal effects. We also present a simulation study that illustrates
the gain in identifiability of total causal effects as the background knowledge
increases. All methods are implemented in the R package pcalg.
|
[{'version': 'v1', 'created': 'Fri, 7 Jul 2017 13:45:01 GMT'}
{'version': 'v2', 'created': 'Tue, 19 Jun 2018 14:19:46 GMT'}]
|
2018-06-20
|
[array(['Perković', 'Emilija', ''], dtype=object)
array(['Kalisch', 'Markus', ''], dtype=object)
array(['Maathuis', 'Maloes H.', ''], dtype=object)]
|
3,583 |
cond-mat/0202079
|
Z. Y. Weng
|
Z. Y. Weng and V. N. Muthukumar
|
Spontaneous Vortex Phase in the Bosonic RVB Theory
|
9 pages, 3 figures embedded
| null |
10.1103/PhysRevB.66.094509
| null |
cond-mat.str-el cond-mat.supr-con
| null |
In the description of spin-charge separation based on the phase string theory
of the t-J model, spinon excitations are vortices in the superconducting state.
Thermally excited spinons destroy phase coherence, leading to a new phase
characterized by the presence of free spinon vortices at temperatures,
T_c<T<T_v. The temperature scale T_v at which holon condensation occurs marks
the onset of pairing amplitude, and is related to the spin pseudogap
temperature T^*. The phase below T_v, called the spontaneous vortex phase,
shows novel transport properties before phase coherence sets in at T_c. We
discuss the Nernst effect as an intrinsic characterization of such a phase, in
comparison with recent experimental measurements.
|
[{'version': 'v1', 'created': 'Wed, 6 Feb 2002 01:02:27 GMT'}]
|
2009-11-07
|
[array(['Weng', 'Z. Y.', ''], dtype=object)
array(['Muthukumar', 'V. N.', ''], dtype=object)]
|
3,584 |
1604.06265
|
Ichiro Shimada
|
Ichiro Shimada, Tetsuji Shioda
|
On a smooth quartic surface containing 56 lines which is isomorphic as a
K3 surface to the Fermat quartic
|
new references are added
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a defining equation of a complex smooth quartic surface containing 56
lines, and investigate its reductions to positive characteristics. This surface
is isomorphic to the complex Fermat quartic surface, which contains only 48
lines. We give the isomorphism explicitly.
|
[{'version': 'v1', 'created': 'Thu, 21 Apr 2016 11:49:43 GMT'}
{'version': 'v2', 'created': 'Sat, 9 Jul 2016 05:07:30 GMT'}
{'version': 'v3', 'created': 'Mon, 5 Sep 2016 03:25:38 GMT'}]
|
2016-09-06
|
[array(['Shimada', 'Ichiro', ''], dtype=object)
array(['Shioda', 'Tetsuji', ''], dtype=object)]
|
3,585 |
1903.00181
|
Olivier Bui
|
Olivier Bui (CPT), Xavier Leoncini (CPT)
|
Growth of a tree with allocations rules: Part 1 Kinematics
| null | null |
10.1140/epjb/e2019-100111-5
| null |
nlin.AO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A non-local model describing the growth of a tree-like transportation network
with given allocation rules is proposed. In this model we focus on tree like
networks, and the network transports the very resource it needs to build
itself. Some general results are given on the viability tree-like networks that
produce an amount of resource based on its amount of leaves while having a
maintenance cost for each node. Some analytical studies and numerical surveys
of the model in "simple" situations are made. The different outcomes are
discussed and possible extensions of the model are then discussed.
|
[{'version': 'v1', 'created': 'Fri, 1 Mar 2019 07:31:16 GMT'}]
|
2019-07-24
|
[array(['Bui', 'Olivier', '', 'CPT'], dtype=object)
array(['Leoncini', 'Xavier', '', 'CPT'], dtype=object)]
|
3,586 |
0905.1838
|
Tao Zhu
|
Tao Zhu, Ji-Rong Ren, and Ming-Fan Li
|
Corrected Entropy of Friedmann-Robertson-Walker Universe in Tunneling
Method
|
25 pages, no figure, and comments are welcome; v2:27 pages, more
references added and typoes corrected, accepted for publication in JCAP
|
JCAP 0908:010,2009
|
10.1088/1475-7516/2009/08/010
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study the thermodynamic quantities of
Friedmann-Robertson-Walker (FRW) universe by using the tunneling formalism
beyond semiclassical approximation developed by \emph{Banerjee} and
\emph{Majhi}\cite{beyond0}. For this we first calculate the corrected
Hawking-like temperature on apparent horizon by considering both scalar
particle and fermion tunneling. With this corrected Hawking-like temperature,
the explicit expressions of the corrected entropy of apparent horizon for
various gravity theories including Einstein gravity, Gauss-Bonnet gravity,
Lovelock gravity, $f(R)$ gravity and scalar-tensor gravity, are computed. Our
results show that the corrected entropy formula for different gravity theories
can be written into a general expression (\ref{entropy-final}) of a same form.
It is also shown that this expression is also valid for black holes. This might
imply that the expression for the corrected entropy derived from tunneling
method is independent of gravity theory, spacetime and dimension of the
spacetime. Moreover, it is concluded that the basic thermodynamical property
that the corrected entropy on apparent horizon is a state function is satisfied
by the FRW universe.
|
[{'version': 'v1', 'created': 'Tue, 12 May 2009 13:15:06 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Jul 2009 11:39:34 GMT'}
{'version': 'v3', 'created': 'Fri, 14 Aug 2009 05:53:03 GMT'}]
|
2009-08-14
|
[array(['Zhu', 'Tao', ''], dtype=object)
array(['Ren', 'Ji-Rong', ''], dtype=object)
array(['Li', 'Ming-Fan', ''], dtype=object)]
|
3,587 |
1810.04331
|
Ali Shameli
|
Itai Ashlagi, Amin Saberi, Ali Shameli
|
Assignment Mechanisms under Distributional Constraints
|
26 pages, conference version published in SODA 2019
| null | null | null |
cs.DS cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the assignment problem of objects to agents with heterogeneous
preferences under distributional constraints. Each agent is associated with a
publicly known type and has a private ordinal ranking over objects. We are
interested in assigning as many agents as possible. Our first contribution is a
generalization of the well-known and widely used serial dictatorship. Our
mechanism maintains several desirable properties of serial dictatorship,
including strategyproofness, Pareto efficiency, and computational tractability
while satisfying the distributional constraints with a small error. We also
propose a generalization of the probabilistic serial algorithm, which finds an
ordinally efficient and envy-free assignment, and also satisfies the
distributional constraints with a small error. We show, however, that no
ordinally efficient and envy-free mechanism is also weakly strategyproof. Both
of our algorithms assign at least the same number of students as the optimum
fractional assignment.
|
[{'version': 'v1', 'created': 'Wed, 10 Oct 2018 02:20:02 GMT'}
{'version': 'v2', 'created': 'Wed, 1 May 2019 08:09:18 GMT'}]
|
2019-05-02
|
[array(['Ashlagi', 'Itai', ''], dtype=object)
array(['Saberi', 'Amin', ''], dtype=object)
array(['Shameli', 'Ali', ''], dtype=object)]
|
3,588 |
0705.1845
|
Pablo Echenique
|
Pablo Echenique
|
Introduction to protein folding for physicists
|
53 pages, 18 figures, the figures are at a low resolution due to
arXiv restrictions, for high-res figures, go to http://www.pabloechenique.com
|
Contemporary Physics 48 (2007) 81-108
|
10.1080/00107510701520843
| null |
physics.bio-ph cond-mat.soft physics.chem-ph q-bio.BM
| null |
The prediction of the three-dimensional native structure of proteins from the
knowledge of their amino acid sequence, known as the protein folding problem,
is one of the most important yet unsolved issues of modern science. Since the
conformational behaviour of flexible molecules is nothing more than a complex
physical problem, increasingly more physicists are moving into the study of
protein systems, bringing with them powerful mathematical and computational
tools, as well as the sharp intuition and deep images inherent to the physics
discipline. This work attempts to facilitate the first steps of such a
transition. In order to achieve this goal, we provide an exhaustive account of
the reasons underlying the protein folding problem enormous relevance and
summarize the present-day status of the methods aimed to solving it. We also
provide an introduction to the particular structure of these biological
heteropolymers, and we physically define the problem stating the assumptions
behind this (commonly implicit) definition. Finally, we review the 'special
flavor' of statistical mechanics that is typically used to study the
astronomically large phase spaces of macromolecules. Throughout the whole work,
much material that is found scattered in the literature has been put together
here to improve comprehension and to serve as a handy reference.
|
[{'version': 'v1', 'created': 'Sun, 13 May 2007 18:33:50 GMT'}]
|
2008-11-24
|
[array(['Echenique', 'Pablo', ''], dtype=object)]
|
3,589 |
hep-lat/9611010
|
Tim Klassen
|
M. Alford, T. R. Klassen and G. P. Lepage
|
Improving Lattice Quark Actions
|
Tiny changes to agree with version to appear in Nucl. Phys. B (33
pages, LaTeX, 13 eps files)
|
Nucl.Phys. B496 (1997) 377-407
|
10.1016/S0550-3213(97)00249-6
| null |
hep-lat
| null |
We explore the first stage of the Symanzik improvement program for lattice
Dirac fermions, namely the construction of doubler-free, highly improved
classical actions on isotropic as well as anisotropic lattices (where the
temporal lattice spacing, a_t, is smaller than the spatial one). Using field
transformations to eliminate doublers, we derive the previously presented
isotropic D234 action with O(a^3) errors, as well as anisotropic D234 actions
with O(a^4) or O(a_t^3, a^4) errors. Besides allowing the simulation of heavy
quarks within a relativistic framework, anisotropic lattices alleviate
potential problems due to unphysical branches of the quark dispersion relation
(which are generic to improved actions), facilitate studies of lattice
thermodynamics, and allow accurate mass determinations for particles with bad
signal/noise properties, like glueballs and P-state mesons. We also show how
field transformations can be used to completely eliminate unphysical branches
of the dispersion relation. Finally, we briefly discuss future steps in the
improvement program.
|
[{'version': 'v1', 'created': 'Fri, 8 Nov 1996 07:19:55 GMT'}
{'version': 'v2', 'created': 'Fri, 11 Apr 1997 02:20:30 GMT'}]
|
2009-10-28
|
[array(['Alford', 'M.', ''], dtype=object)
array(['Klassen', 'T. R.', ''], dtype=object)
array(['Lepage', 'G. P.', ''], dtype=object)]
|
3,590 |
hep-lat/9809027
|
Randy Lewis
|
Randy Lewis and R. M. Woloshyn
|
S-wave charmed mesons in lattice NRQCD
|
LATTICE98(heavyqk), 3 pages including 3 figures
|
Nucl.Phys.Proc.Suppl.73:333-335,1999
|
10.1016/S0920-5632(99)85064-6
|
JLAB-THY-98-34 and TRI-PP-98-23
|
hep-lat
| null |
Heavy-light mesons can be studied using the 1/M expansion of NRQCD, provided
the heavy quark mass is sufficiently large. Calculations of the S-wave charmed
meson masses from a classically and tadpole-improved action are presented. A
comparison of O(1/M), O(1/M^2) and O(1/M^3) results allows convergence of the
expansion to be discussed. It is shown that the form of discretized heavy quark
propagation must be chosen carefully.
|
[{'version': 'v1', 'created': 'Fri, 4 Sep 1998 22:08:33 GMT'}]
|
2014-11-17
|
[array(['Lewis', 'Randy', ''], dtype=object)
array(['Woloshyn', 'R. M.', ''], dtype=object)]
|
3,591 |
2105.00398
|
Fan Zhu
|
Xin Xu, Yu Dong, Fan Zhu
|
A LiDAR Assisted Control Module with High Precision in Parking Scenarios
for Autonomous Driving Vehicle
| null | null | null | null |
cs.RO cs.AI
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Autonomous driving has been quite promising in recent years. The public has
seen Robotaxi delivered by Waymo, Baidu, Cruise, and so on. While autonomous
driving vehicles certainly have a bright future, we have to admit that it is
still a long way to go for products such as Robotaxi. On the other hand, in
less complex scenarios autonomous driving may have the potentiality to reliably
outperform humans. For example, humans are good at interactive tasks (while
autonomous driving systems usually do not), but we are often incompetent for
tasks with strict precision demands. In this paper, we introduce a real-world,
industrial scenario of which human drivers are not capable. The task required
the ego vehicle to keep a stationary lateral distance (i.e. 3? <= 5
centimeters) with respect to a reference. To address this challenge, we
redesigned the control module from Baidu Apollo open-source autonomous driving
system. A precise (3? <= 2 centimeters) Error Feedback System was first built
to partly replace the localization module. Then we investigated the control
module thoroughly and added a real-time calibration algorithm to gain extra
precision. We also built a simulation to fine-tune the control parameters.
After all those works, the results are encouraging, showing that an end-to-end
lateral precision with 3? <= 5 centimeters has been achieved. Further, we show
that the results not only outperformed original Apollo modules but also beat
specially trained and highly experienced human test drivers.
|
[{'version': 'v1', 'created': 'Sun, 2 May 2021 06:13:32 GMT'}]
|
2021-05-04
|
[array(['Xu', 'Xin', ''], dtype=object)
array(['Dong', 'Yu', ''], dtype=object)
array(['Zhu', 'Fan', ''], dtype=object)]
|
3,592 |
0908.0988
|
Shuichi Yokoyama
|
Yosuke Imamura and Shuichi Yokoyama
|
A Monopole Index for N=4 Chern-Simons Theories
|
35 pages, v2: typos corrected, a reference added
|
Nucl.Phys.B827:183-216,2010
|
10.1016/j.nuclphysb.2009.10.025
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compute a certain index for an N=4 Chern-Simons theory with gauge group
U(N)^r in the large N limit with taking account of monopole contribution, and
compare it to the corresponding multi-particle index for M-theory in the dual
geometry AdS_4 x X_7. The internal space X_7 has non-trivial two-cycles, and
M2-branes wrapped on them contribute to the multi-particle index. We establish
one-to-one map between r-1 independent magnetic charges on the gauge theory
side and the same number of charges on the gravity side: the M-momentum and r-2
(=b_2(X_7)) wrapping numbers. With a certain assumption for the wrapped
M2-brane contribution, we confirm the agreement of the indices for many sectors
specified by the r-1 charges by using analytic and numerical methods.
|
[{'version': 'v1', 'created': 'Fri, 7 Aug 2009 06:21:03 GMT'}
{'version': 'v2', 'created': 'Tue, 8 Sep 2009 11:55:43 GMT'}]
|
2009-12-04
|
[array(['Imamura', 'Yosuke', ''], dtype=object)
array(['Yokoyama', 'Shuichi', ''], dtype=object)]
|
3,593 |
1004.0864
|
Haisheng Li Dr.
|
Haisheng Li
|
Twisted modules and pseudo-endomorphisms
|
Latex, 21 pages
| null | null | null |
math.QA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We exhibit a connection between two constructions of twisted modules for a
general vertex operator algebra with respect to inner automorphisms. We also
study pseudo-derivations, pseudo-endomorphisms, and twist deformations of
ordinary modules by pseudo-endomorphisms, which are intrinsically connected to
one of the two constructions.
|
[{'version': 'v1', 'created': 'Tue, 6 Apr 2010 14:55:19 GMT'}]
|
2010-04-07
|
[array(['Li', 'Haisheng', ''], dtype=object)]
|
3,594 |
2301.00057
|
Christian Ellis
|
Christian Ellis, Maggie Wigness, Lance Fiondella
|
A Mapping of Assurance Techniques for Learning Enabled Autonomous
Systems to the Systems Engineering Lifecycle
| null |
Final submission to 2022 IEEE International Conference on Assured
Autonomy
|
10.1109/ICAA52185.2022.00013
| null |
cs.SE cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Learning enabled autonomous systems provide increased capabilities compared
to traditional systems. However, the complexity of and probabilistic nature in
the underlying methods enabling such capabilities present challenges for
current systems engineering processes for assurance, and test, evaluation,
verification, and validation (TEVV). This paper provides a preliminary attempt
to map recently developed technical approaches in the assurance and TEVV of
learning enabled autonomous systems (LEAS) literature to a traditional systems
engineering v-model. This mapping categorizes such techniques into three main
approaches: development, acquisition, and sustainment. We review the latest
techniques to develop safe, reliable, and resilient learning enabled autonomous
systems, without recommending radical and impractical changes to existing
systems engineering processes. By performing this mapping, we seek to assist
acquisition professionals by (i) informing comprehensive test and evaluation
planning, and (ii) objectively communicating risk to leaders.
|
[{'version': 'v1', 'created': 'Fri, 30 Dec 2022 21:44:23 GMT'}]
|
2023-01-03
|
[array(['Ellis', 'Christian', ''], dtype=object)
array(['Wigness', 'Maggie', ''], dtype=object)
array(['Fiondella', 'Lance', ''], dtype=object)]
|
3,595 |
2103.05397
|
Maximilian Becker
|
M. Becker
|
Extracellular electrical stimulation by ferroelectric displacement
current in the switching regime
| null | null | null | null |
physics.med-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze the extracellular stimulation current and the charge injection
capacitity (CIC) of microelectrodes coated with an insulating layer to prevent
toxic electrochemical effects in bioelectronic applications. We show for a
microelectrode coated with an insulating ferroelectric layer, that the
ferroelectric polarization current contributes to the extracellular stimulation
current. Depending on the remanent polarization $P_{\rm r}$ of the
ferroelectric, the polarization current in the switching regime can increase
the CIC by up to two orders of magnitude as compared to the commonly used
extracellular capacitive stimulation with microelectrodes that are coated with
a dielectric layer.
|
[{'version': 'v1', 'created': 'Tue, 9 Mar 2021 12:39:06 GMT'}]
|
2021-03-10
|
[array(['Becker', 'M.', ''], dtype=object)]
|
3,596 |
2306.02070
|
Dong Zhao
|
Dong Zhao
|
Adaptive Approximation-Based Control for Nonlinear Systems: A Unified
Solution with Accurate and Inaccurate Measurements
| null | null | null | null |
eess.SY cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A unified solution to adaptive approximation-based control for nonlinear
systems with accurate and inaccurate state measurement is synthesized in this
study. Starting from the standard adaptive approximation-based controller with
accurate state measurement, its corresponding physical interpretation,
stability conclusion, and learning ability are rigorously addressed when facing
additive measurement inaccuracy, and explicit answers are obtained in the
framework of both controller matching and system matching. Finally, it proves
that, with a certain condition, the standard adaptive approximation-based
controller works as a unified solution for the cases with accurate and
inaccurate measurement, and the solution can be extended to the nonlinear
system control problems with extra unknown dynamics or faults in actuator
and/or process dynamics. A single-link robot arm example is used for the
simulation demonstration of the unified solution.
|
[{'version': 'v1', 'created': 'Sat, 3 Jun 2023 10:19:18 GMT'}]
|
2023-06-06
|
[array(['Zhao', 'Dong', ''], dtype=object)]
|
3,597 |
0902.4327
|
Wladyslaw A. Majewski
|
L. E. Labuschagne and W. A. Majewski
|
Quantum L_p and Orlicz spaces
|
11 pages
|
Quantum Probability and Related Topics, vol. XXIII, World
Scientific, 2008, pp176-189
| null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\A$ ($\cM$) be a $C^*$-algebra (a von Neumann algebra respectively). By
a quantum dynamical system we shall understand the pair $({\A}, T)$ ($({\cM},
T)$) where $T : {\A} \to {\A}$ ($T : {\cM} \to {\cM}$) is a linear, positive
(normal respectively), and identity preserving map. In our lecture, we discuss
how the techniques of quantum Orlicz spaces may be used to study quantum
dynamical systems. To this end, we firstly give a brief exposition of the
theory of quantum dynamical systems in quantum $L_p$ spaces. Secondly, we
describe the Banach space approach to quantization of classical Orlicz spaces.
We will discuss the necessity of the generalization of $L_p$-space techniques.
Some emphasis will be put on the construction of non-commutative Orlicz spaces.
The question of lifting dynamical systems defined on von Neumann algebra to a
dynamical system defined in terms of quantum Orlicz space will be discussed.
|
[{'version': 'v1', 'created': 'Wed, 25 Feb 2009 09:50:37 GMT'}]
|
2009-02-26
|
[array(['Labuschagne', 'L. E.', ''], dtype=object)
array(['Majewski', 'W. A.', ''], dtype=object)]
|
3,598 |
hep-ph/9908404
|
Matthias Neubert
|
Alexander L. Kagan and Matthias Neubert (SLAC)
|
Large Delta(I)=3/2 Contribution to epsilon'/epsilon in Supersymmetry
|
8 pages, 2 figures
|
Phys.Rev.Lett. 83 (1999) 4929-4932
|
10.1103/PhysRevLett.83.4929
|
SLAC-PUB-8231
|
hep-ph
| null |
We show that in supersymmetric extensions of the Standard Model gluino box
diagrams can yield a large Delta(I)=3/2 contribution to s->d+q(bar)+q FCNC
processes, which may induce a sizable CP-violating contribution to the I=2
isospin amplitude in K->pi+pi decays. This contribution only requires moderate
mass splitting between the right-handed up- and down-squarks, and persists for
squark masses of order 1 TeV. Taking into account current bounds on
Im(delta_{sd}^{LL}) from K-K(bar) mixing, the resulting contribution to
epsilon'/epsilon could be an order of magnitude larger than the measured value.
|
[{'version': 'v1', 'created': 'Wed, 18 Aug 1999 22:07:38 GMT'}]
|
2009-10-31
|
[array(['Kagan', 'Alexander L.', '', 'SLAC'], dtype=object)
array(['Neubert', 'Matthias', '', 'SLAC'], dtype=object)]
|
3,599 |
1205.6829
|
Erez Etzion
|
Yiftah Silver, Robert Ball, James R. Beene, Yan Benhammou, Meny
Ben-Moshe, J. W. Chapman, Tiesheng Dai, Erez Etzion, Claudio Ferretti, Nir
Guttman, Peter S. Friedman, Daniel S. Levin, S. Ritt, Robert L. Varner,
Curtis Weaverdyck, Bing Zhou
|
Development of a plasma panel radiation detector: recent progress and
key issues
|
presented at IEEE NSS 2011 (Barcelona)
| null |
10.1109/NSSMIC.2011.6154379
| null |
physics.ins-det
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A radiation detector based on plasma display panel technology, which is the
principal component of plasma television displays is presented. Plasma Panel
Sensor (PPS) technology is a variant of micropattern gas radiation detectors.
The PPS is conceived as an array of sealed plasma discharge gas cells which can
be used for fast response (O(5ns) per pixel), high spatial resolution detection
(pixel pitch can be less than 100 micrometer) of ionizing and minimum ionizing
particles. The PPS is assembled from non-reactive, intrinsically radiation-hard
materials: glass substrates, metal electrodes and inert gas mixtures. We report
on the PPS development program, including simulations and design and the first
laboratory studies which demonstrate the usage of plasma display panels in
measurements of cosmic ray muons, as well as the expansion of experimental
results on the detection of betas from radioactive sources.
|
[{'version': 'v1', 'created': 'Wed, 30 May 2012 21:01:58 GMT'}]
|
2016-11-17
|
[array(['Silver', 'Yiftah', ''], dtype=object)
array(['Ball', 'Robert', ''], dtype=object)
array(['Beene', 'James R.', ''], dtype=object)
array(['Benhammou', 'Yan', ''], dtype=object)
array(['Ben-Moshe', 'Meny', ''], dtype=object)
array(['Chapman', 'J. W.', ''], dtype=object)
array(['Dai', 'Tiesheng', ''], dtype=object)
array(['Etzion', 'Erez', ''], dtype=object)
array(['Ferretti', 'Claudio', ''], dtype=object)
array(['Guttman', 'Nir', ''], dtype=object)
array(['Friedman', 'Peter S.', ''], dtype=object)
array(['Levin', 'Daniel S.', ''], dtype=object)
array(['Ritt', 'S.', ''], dtype=object)
array(['Varner', 'Robert L.', ''], dtype=object)
array(['Weaverdyck', 'Curtis', ''], dtype=object)
array(['Zhou', 'Bing', ''], dtype=object)]
|
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