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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4,700 |
1703.02188
|
Y. M. Cho
|
Y. M. Cho, Kyoungtae Kimm, Seunghun Oh, J. H. Yoon
|
Cosmological Production of Electroweak Monopole
| null | null |
10.1051/epjconf/201818202030
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the cosmological production and the successive evolution of the
electroweak (Cho-Maison) monopole in the standard model, and estimate the
remnant monopole density at present universe. We confirm that, although the
electroweak phase transition is of the first order, it is very mildly the first
order. So the monopole production comes from the thermal fluctuations of the
Higgs field after the phase transition, not the vacuum bubble collisions during
the phase transition. Moreover, while the monopoles are produced copiously
around the Ginzburg temperature $T_G\simeq 59.6~{\rm TeV}$, most of them are
annihilated as soon as created. This annihilation process continues very long
time, untill the monopoles are decoupled from the other matters when the
temperature cools to about 30 MeV. As the result the remnant monopole density
at present universe becomes very small, of $10^{-11}$ of the critical density,
too small to affect the standard cosmology and too small be the dark matter. We
discuss the physical implications of our results on the ongoing monopole
detection experiments, in particular on MoEDAL, IceCube, ANTARES, Auger, and
Super-Kamiokande.
|
[{'version': 'v1', 'created': 'Tue, 7 Mar 2017 02:51:29 GMT'}
{'version': 'v2', 'created': 'Thu, 30 Mar 2017 00:31:58 GMT'}
{'version': 'v3', 'created': 'Tue, 18 Apr 2017 00:20:17 GMT'}]
|
2018-08-22
|
[array(['Cho', 'Y. M.', ''], dtype=object)
array(['Kimm', 'Kyoungtae', ''], dtype=object)
array(['Oh', 'Seunghun', ''], dtype=object)
array(['Yoon', 'J. H.', ''], dtype=object)]
|
4,701 |
1310.1494
|
Gregory Seregin
|
Gregory Seregin
|
Liouville Theorem for 2D Navier-Stokes equations in Half Space
|
13 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the paper, a Liouville theorem for mild bounded ancient solutions to the
2D Navier-Stokes equations in half space has been proven.
|
[{'version': 'v1', 'created': 'Sat, 5 Oct 2013 16:40:07 GMT'}]
|
2013-10-08
|
[array(['Seregin', 'Gregory', ''], dtype=object)]
|
4,702 |
1501.01391
|
Anthony Nixon
|
Anthony Nixon, Bernd Schulze, Shin-ichi Tanigawa and Walter Whiteley
|
Rigidity of frameworks on expanding spheres
|
22 pages, 2 figures, updated references
| null | null | null |
math.MG math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A rigidity theory is developed for bar-joint frameworks in $\mathbb{R}^{d+1}$
whose vertices are constrained to lie on concentric $d$-spheres with
independently variable radii. In particular, combinatorial characterisations
are established for the rigidity of generic frameworks for $d=1$ with an
arbitrary number of independently variable radii, and for $d=2$ with at most
two variable radii. This includes a characterisation of the rigidity or
flexibility of uniformly expanding spherical frameworks in $\mathbb{R}^{3}$.
Due to the equivalence of the generic rigidity between Euclidean space and
spherical space, these results interpolate between rigidity in 1D and 2D and to
some extent between rigidity in 2D and 3D. Symmetry-adapted counts for the
detection of symmetry-induced continuous flexibility in frameworks on spheres
with variable radii are also provided.
|
[{'version': 'v1', 'created': 'Wed, 7 Jan 2015 08:32:47 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Feb 2017 18:42:32 GMT'}]
|
2017-02-14
|
[array(['Nixon', 'Anthony', ''], dtype=object)
array(['Schulze', 'Bernd', ''], dtype=object)
array(['Tanigawa', 'Shin-ichi', ''], dtype=object)
array(['Whiteley', 'Walter', ''], dtype=object)]
|
4,703 |
cond-mat/0204242
|
Nigel L. Dickens
|
David E. Logan and Nigel L. Dickens
|
Finite temperature dynamics of the Anderson model
| null |
J. Phys.: Condens. Matter 14 (2002) 3605
|
10.1088/0953-8984/14/13/318
| null |
cond-mat.str-el
| null |
The recently introduced local moment approach (LMA) is extended to encompass
single-particle dynamics and transport properties of the Anderson impurity
model at finite-temperature, T. While applicable to arbitrary interaction
strengths, primary emphasis is given to the strongly correlated Kondo regime
(characterized by the T=0 Kondo scale $\omega_{\rm K}$). In particular the
resultant universal scaling behaviour of the single-particle spectrum
$D(\omega; T) \equiv F(\frac{\w}{\omega_{\rm K}}; \frac{T}{\omega_{\rm K}})$
within the LMA is obtained in closed form; leading to an analytical description
of the thermal destruction of the Kondo resonance on all energy scales.
Transport properties follow directly from a knowledge of $D(\omega; T)$. The $T
/ \omega_{\rm K}$-dependence of the resulting resistivity $\rho(T)$, which is
found to agree rather well with numerical renormalization group calculations,
is shown to be asymptotically exact at high temperatures; to concur well with
the Hamann approximation for the s-d model down to $T/\omega_{\rm K} \sim 1$,
and to cross over smoothly to the Fermi liquid form $\rho (T) - \rho (0)
\propto -(T/\omega_{\rm K})^2$ in the low-temperature limit. The underlying
approach, while naturally approximate, is moreover applicable to a broad range
of quantum impurity and related models.
|
[{'version': 'v1', 'created': 'Thu, 11 Apr 2002 09:56:35 GMT'}]
|
2009-11-07
|
[array(['Logan', 'David E.', ''], dtype=object)
array(['Dickens', 'Nigel L.', ''], dtype=object)]
|
4,704 |
2107.07836
|
Anatoli Juditsky B.
|
Anatoli Juditsky and Arkadi Nemirovski
|
Aggregating estimates by convex optimization
| null | null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the approach to estimate aggregation and adaptive estimation based
upon (nearly optimal) testing of convex hypotheses. We show that in the
situation where the observations stem from {\em simple observation schemes} and
where set of unknown signals is a finite union of convex and compact sets, the
proposed approach leads to aggregation and adaptation routines with nearly
optimal performance. As an illustration, we consider application of the
proposed estimates to the problem of recovery of unknown signal known to belong
to a union of ellitopes in Gaussian observation scheme. The proposed approach
can be implemented efficiently when the number of sets in the union is "not
very large." We conclude the paper with a small simulation study illustrating
practical performance of the proposed procedures in the problem of signal
estimation in the single-index model.
|
[{'version': 'v1', 'created': 'Fri, 16 Jul 2021 11:49:30 GMT'}]
|
2021-07-19
|
[array(['Juditsky', 'Anatoli', ''], dtype=object)
array(['Nemirovski', 'Arkadi', ''], dtype=object)]
|
4,705 |
hep-ph/0609055
|
Douglas Gingrich Mr.
|
Douglas M. Gingrich
|
Black Hole Cross Section at the Large Hadron Collider
|
28 pages, 9 figures, LaTeX; added references, corrected typos,
expanded discussion
|
Int.J.Mod.Phys. A21 (2006) 6653-6676
|
10.1142/S0217751X06035087
| null |
hep-ph gr-qc hep-th
| null |
Black hole production at the Large Hadron Collider (LHC) was first discussed
in 1999. Since then, much work has been performed in predicting the black hole
cross section. In light of the start up of the LHC, it is now timely to review
the state of these calculations. We review the uncertainties in estimating the
black hole cross section in higher dimensions. One would like to make this
estimate as precise as possible since the predicted values, or lower limits,
obtain for the fundamental Planck scale and number of extra dimensions from
experiments will depend directly on the accuracy of the cross section. Based on
the current knowledge of the cross section, we give a range of lower limits on
the fundamental Planck scale that could be obtained at LHC energies.
|
[{'version': 'v1', 'created': 'Wed, 6 Sep 2006 04:19:59 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Dec 2006 17:11:20 GMT'}]
|
2009-11-11
|
[array(['Gingrich', 'Douglas M.', ''], dtype=object)]
|
4,706 |
1505.06629
|
Ulrich Haisch
|
Ulrich Haisch
|
Dark matter at the LHC
|
6 pages, 5 figures; contribution to the proceedings of the Moriond
Electroweak 2015 session
| null | null | null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
I briefly discuss recent theoretical advances in the description of mono-X
signals at the LHC.
|
[{'version': 'v1', 'created': 'Mon, 25 May 2015 13:51:12 GMT'}]
|
2015-05-26
|
[array(['Haisch', 'Ulrich', ''], dtype=object)]
|
4,707 |
solv-int/9904023
|
Andrew Pickering
|
Pilar R. Gordoa, Nalini Joshi and Andrew Pickering
|
Mappings preserving locations of movable poles: a new extension of the
truncation method to ordinary differential equations
|
To appear in Nonlinearity (22 pages)
| null |
10.1088/0951-7715/12/4/313
| null |
solv-int nlin.SI
| null |
The truncation method is a collective name for techniques that arise from
truncating a Laurent series expansion (with leading term) of generic solutions
of nonlinear partial differential equations (PDEs). Despite its utility in
finding Backlund transformations and other remarkable properties of integrable
PDEs, it has not been generally extended to ordinary differential equations
(ODEs). Here we give a new general method that provides such an extension and
show how to apply it to the classical nonlinear ODEs called the Painleve
equations. Our main new idea is to consider mappings that preserve the
locations of a natural subset of the movable poles admitted by the equation. In
this way we are able to recover all known fundamental Backlund transformations
for the equations considered. We are also able to derive Backlund
transformations onto other ODEs in the Painleve classification.
|
[{'version': 'v1', 'created': 'Thu, 29 Apr 1999 15:50:18 GMT'}]
|
2009-10-31
|
[array(['Gordoa', 'Pilar R.', ''], dtype=object)
array(['Joshi', 'Nalini', ''], dtype=object)
array(['Pickering', 'Andrew', ''], dtype=object)]
|
4,708 |
1603.06620
|
Mikolaj Lasota
|
Miko{\l}aj Lasota, Radim Filip and Vladyslav C. Usenko
|
Sufficiency of quantum non-Gaussianity for discrete-variable quantum key
distribution over noisy channel
|
15 pages, 10 figures
|
Phys. Rev. A 96, 012301 (2017)
|
10.1103/PhysRevA.96.012301
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantum key distribution can be enhanced and extended if nonclassical
single-photon states of light are used. We study a connection between the
security of quantum key distribution and quantum non-Gaussianity of light
arriving at the receiver's detection system after the propagation through a
noisy quantum channel, being under full control of an eavesdropper performing
general collective attacks. We show that while quantum nonclassicality
exhibited by the light arriving at the receiver's station is a necessary
indication of the security of the discrete-variable protocols, quantum
non-Gaussianity can be a sufficient indication of their security. Therefore,
checking for non-Gaussianity of this light by performing standard
autocorrelation function measurement can be used for prior verification of the
usability of prepare-and-measure schemes. It can play similar role to the prior
verification of the quantum correlations sufficient to violate Bell
inequalities for entanglement-based protocols.
|
[{'version': 'v1', 'created': 'Mon, 21 Mar 2016 21:20:31 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Jul 2017 08:58:26 GMT'}]
|
2017-07-13
|
[array(['Lasota', 'Mikołaj', ''], dtype=object)
array(['Filip', 'Radim', ''], dtype=object)
array(['Usenko', 'Vladyslav C.', ''], dtype=object)]
|
4,709 |
2207.02279
|
Asiegbu Miracle Kanu-Asiegbu
|
Asiegbu Miracle Kanu-Asiegbu, Ram Vasudevan, Xiaoxiao Du
|
Leveraging Trajectory Prediction for Pedestrian Video Anomaly Detection
|
Accepted to 2021 IEEE Symposium Series on Computational Intelligence
(SSCI)
| null |
10.1109/SSCI50451.2021.9660004
| null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Video anomaly detection is a core problem in vision. Correctly detecting and
identifying anomalous behaviors in pedestrians from video data will enable
safety-critical applications such as surveillance, activity monitoring, and
human-robot interaction. In this paper, we propose to leverage trajectory
localization and prediction for unsupervised pedestrian anomaly event
detection. Different than previous reconstruction-based approaches, our
proposed framework rely on the prediction errors of normal and abnormal
pedestrian trajectories to detect anomalies spatially and temporally. We
present experimental results on real-world benchmark datasets on varying
timescales and show that our proposed trajectory-predictor-based anomaly
detection pipeline is effective and efficient at identifying anomalous
activities of pedestrians in videos. Code will be made available at
https://github.com/akanuasiegbu/Leveraging-Trajectory-Prediction-for-Pedestrian-Video-Anomaly-Detection.
|
[{'version': 'v1', 'created': 'Tue, 5 Jul 2022 19:44:34 GMT'}]
|
2022-07-07
|
[array(['Kanu-Asiegbu', 'Asiegbu Miracle', ''], dtype=object)
array(['Vasudevan', 'Ram', ''], dtype=object)
array(['Du', 'Xiaoxiao', ''], dtype=object)]
|
4,710 |
2207.02351
|
Peter T. J. Bradshaw
|
Peter T. J. Bradshaw
|
An Algebraic Theory of Non-Relativistic Spin
|
27 pages, 1 figure, 2 tables, v2 changes: Restructured introduction.
Restructured arguments to use the step maps earlier. Added step-level and
step-up in terms of multipoles. Fixed typos
| null | null | null |
quant-ph math-ph math.MP
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper we present a new, elementary derivation of non-relativistic
spin using exclusively real algebraic methods. To do this, we formulate a novel
method to decompose the domain of a real endomorphism according to its
algebraic properties. We reveal non-commutative multipole tensors as the
primary physically meaningful observables of spin, and indicate that spin is
fundamentally geometric in nature. In so doing, we demonstrate that neither
dynamics nor complex numbers are essential to the fundamental description of
spin.
|
[{'version': 'v1', 'created': 'Tue, 5 Jul 2022 22:54:39 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Oct 2022 16:13:51 GMT'}]
|
2022-10-07
|
[array(['Bradshaw', 'Peter T. J.', ''], dtype=object)]
|
4,711 |
1610.00657
|
Ruslan Metsaev
|
R.R. Metsaev
|
Continuous spin gauge field in (A)dS space
|
Comments: 14 pages, v2: Formulas (3.24) (3.25), footnotes 1,3,4,5 and
references added. Typos in eqs.(4.34) corrected
| null |
10.1016/j.physletb.2017.02.027
|
FIAN-TD-2016-22
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Totally symmetric continuous spin field propagating in (A)dS is studied.
Lagrangian gauge invariant formulation for such field is developed. Lagrangian
of continuous spin field is constructed in terms of double traceless tensor
fields, while gauge transformations are constructed in terms of traceless gauge
transformation parameters. de Donder like gauge condition that leads to simple
gauge fixed Lagrangian is found. Gauge-fixed Lagrangian invariant under global
BRST transformations is presented. The BRST Lagrangian is used for computation
of a partition function. It is demonstrated that the partition function of the
continuous spin field is equal to one. Various decoupling limits of the
continuous spin field are also studied.
|
[{'version': 'v1', 'created': 'Mon, 3 Oct 2016 18:18:18 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Feb 2017 18:08:17 GMT'}]
|
2017-04-05
|
[array(['Metsaev', 'R. R.', ''], dtype=object)]
|
4,712 |
1107.5250
|
Eva Hackmann
|
Eva Hackmann and Claus L\"ammerzahl
|
Observables for bound orbital motion in axially symmetric space-times
|
18 pages, revised version
|
Phys. Rev. D 85, 044049 (2012)
|
10.1103/PhysRevD.85.044049
| null |
gr-qc math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The periastron shift and the Lense-Thirring effect of bound orbital motion in
a general axially symmetric space-time given by Pleba\'nski and Demia\'nski are
analyzed. We also define a measure for the conicity of the orbit and give
analytic expressions for all three observables in terms of hyperelliptic
integrals and Lauricella's $F_D$ function. For an interpretation of these
analytical expressions, we perform a post-Schwarzschild and a post-Newton
expansion of these quantities. This clearly shows the influence of the
different space-time parameters on the considered observables and allows to
characterize Kerr, Taub-NUT, Schwarzschild-de Sitter, or other space-times.
|
[{'version': 'v1', 'created': 'Tue, 26 Jul 2011 16:02:25 GMT'}
{'version': 'v2', 'created': 'Tue, 6 Sep 2011 10:33:38 GMT'}
{'version': 'v3', 'created': 'Wed, 11 Apr 2012 10:33:58 GMT'}]
|
2012-04-12
|
[array(['Hackmann', 'Eva', ''], dtype=object)
array(['Lämmerzahl', 'Claus', ''], dtype=object)]
|
4,713 |
1908.09293
|
Matti Raasakka
|
Matti Raasakka
|
Spacetime granularity from finite-dimensionality of local observable
algebras
|
16 pages; changes to v3: title modified, multiple references added,
minor changes to the text
|
Class. Quantum Grav. 37, 045014 (2020)
|
10.1088/1361-6382/ab5eb0
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There are important indications that nature may be locally
finite-dimensional, i.e., that any spatially bounded subsystem can be described
by a finite-dimensional local observable algebra. Motivated by these ideas, we
show that operational spacetime topology is described by an atomistic Boolean
algebra if (i) local observable algebras are finite-dimensional factors, (ii)
the intersection of two local algebras is also local, and (iii) the commutant
of a local algebra is also local. Thus, in this case, spacetime has a
point-free granular behavior at small scales.
|
[{'version': 'v1', 'created': 'Sun, 25 Aug 2019 10:02:30 GMT'}
{'version': 'v2', 'created': 'Sat, 7 Sep 2019 09:09:03 GMT'}
{'version': 'v3', 'created': 'Mon, 25 Nov 2019 20:49:41 GMT'}]
|
2020-01-28
|
[array(['Raasakka', 'Matti', ''], dtype=object)]
|
4,714 |
1811.08915
|
Sol\`ene Ulmer-Moll
|
S. Ulmer-Moll, P. Figueira, J. J. Neal, N. C. Santos, and M. Bonnefoy
|
Telluric correction in the near-infrared: Standard star or synthetic
transmission?
|
18 pages, 13 figures, Accepted to A&A
|
A&A 621, A79 (2019)
|
10.1051/0004-6361/201833282
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Context. The atmospheric absorption of the Earth is an important limiting
factor for ground-based spectroscopic observations and the near-infrared and
infrared regions are the most affected. Several software packages that produce
a synthetic atmospheric transmission spectrum have been developed to correct
for the telluric absorption; these are Molecfit, TelFit, and TAPAS. Aims. Our
goal is to compare the correction achieved using these three telluric
correction packages and the division by a telluric standard star. We want to
evaluate the best method to correct near-infrared high-resolution spectra as
well as the limitations of each software package and methodology. Methods. We
applied the telluric correction methods to CRIRES archival data taken in the J
and K bands. We explored how the achieved correction level varies depending on
the atmospheric T-P profile used in the modelling, the depth of the atmospheric
lines, and the molecules creating the absorption. Results. We found that the
Molecfit and TelFit corrections lead to smaller residuals for the water lines.
The standard star method corrects best the oxygen lines. The Molecfit package
and the standard star method corrections result in global offsets always below
0.5% for all lines; the offset is similar with TelFit and TAPAS for the H2O
lines and around 1% for the O2 lines. All methods and software packages result
in a scatter between 3% and 7% inside the telluric lines. The use of a tailored
atmospheric profile for the observatory leads to a scatter two times smaller,
and the correction level improves with lower values of precipitable water
vapour. Conclusions. The synthetic transmission methods lead to an improved
correction compared to the standard star method for the water lines in the J
band with no loss of telescope time, but the oxygen lines were better corrected
by the standard star method.
|
[{'version': 'v1', 'created': 'Wed, 21 Nov 2018 19:05:06 GMT'}]
|
2019-01-16
|
[array(['Ulmer-Moll', 'S.', ''], dtype=object)
array(['Figueira', 'P.', ''], dtype=object)
array(['Neal', 'J. J.', ''], dtype=object)
array(['Santos', 'N. C.', ''], dtype=object)
array(['Bonnefoy', 'M.', ''], dtype=object)]
|
4,715 |
1304.5182
|
Siyuan Ji
|
S. Ji, V. Sanghai, C. Ates, and I. Lesanovsky
|
Inhomogeneities and impurities in a dense one-dimensional Rydberg
lattice gas
|
5 pages and 4 figures
|
Phys. Rev. A 89, 021404 (2014)
|
10.1103/PhysRevA.89.021404
| null |
cond-mat.quant-gas physics.atom-ph quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a dense one-dimensional laser-driven Rydberg lattice gas with
perfect nearest-neighbor blockade. The ground state of this system can be found
analytically in certain parameter regimes even when the applied fields are
inhomogeneous in space. We will use this unique feature to investigate the
effect of an impurity - introduced by the local variation of the laser
parameters - on the correlations of the many-body ground state. Moreover, we
explore the role of a staggered laser field which alternates from site to site
thereby breaking the sublattice symmetry. We demonstrate that this technique,
which can be applied experimentally, reveals insights into the role of
long-range interactions on the critical properties of a Rydberg gas. Our work
highlight novel possibilities for the exploration of many-body physics in
Rydberg lattice gases based on locally tuneable laser fields.
|
[{'version': 'v1', 'created': 'Thu, 18 Apr 2013 16:48:11 GMT'}]
|
2014-02-19
|
[array(['Ji', 'S.', ''], dtype=object)
array(['Sanghai', 'V.', ''], dtype=object)
array(['Ates', 'C.', ''], dtype=object)
array(['Lesanovsky', 'I.', ''], dtype=object)]
|
4,716 |
2206.11666
|
Ying-Ming Xie
|
Ying-Ming Xie, Cheng-Ping Zhang, and K. T. Law
|
Topological $p_x+ip_y$ inter-valley coherent state in Moir\'e
MoTe$_2$/WSe$_2$ heterobilayers
|
8 pages, 4 figures, plus Supplementary Information
| null | null | null |
cond-mat.mtrl-sci cond-mat.mes-hall cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, a quantum anomalous Hall (QAH) state was observed in AB stacked
moir\'e MoTe$_2$/WSe$_2$ heterobilayers at half-filling. More recent
layer-resolved magnetic circular dichroism (MCD) measurements revealed that
spin-polarized moir\'e bands from both the MoTe$_2$ and the WSe$_2$ layers are
involved at the formation of the QAH state. This scenario is not expected by
existing theories. In this work, we suggest that the observed QAH state is a
new state of matter, namely, a topological $p_x+ip_y$ inter-valley coherent
state (TIVC). We point out that the massive Dirac spectrum of the MoTe$_2$
moir\'e bands, together with the Hund's interaction and the Coulomb
interactions give rise to this novel QAH state. Through a self-consistent
Hartree-Fock analysis, we find a wide range of interaction strengths and
displacement fields that the $p_x+ip_y$-pairing phase is energetically
favourable. Besides explaining several key features of the experiments, our
theory predicts that the order parameter would involve the pairing of electrons
and holes with a definite momentum mismatch such that the pairing would
generate a new unit cell which is three times the size of the original moir\'e
unit cell, due to the order parameter modulations.
|
[{'version': 'v1', 'created': 'Thu, 23 Jun 2022 12:46:01 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Jun 2022 03:28:04 GMT'}]
|
2022-06-27
|
[array(['Xie', 'Ying-Ming', ''], dtype=object)
array(['Zhang', 'Cheng-Ping', ''], dtype=object)
array(['Law', 'K. T.', ''], dtype=object)]
|
4,717 |
1808.05178
|
Maur\'icio Corr\^ea
|
Maur\'icio Corr\^ea, Fernando Louren\c{c}o, Diogo Machado and Antonio
M. Ferreira
|
On Gauss-Bonnet and Poincar\'e-Hopf type theorems for complex
$\partial$-manifolds
|
To appear in Moscow Mathematical Journal; To Omegar Calvo-Andrade on
the occasion of his 60th birthday
| null | null | null |
math.AG math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a Gauss-Bonnet and Poincar\'e-Hopf type theorems for complex
$\partial$-manifold $\tilde{X} = X - D$, where $X$ is a complex compact
manifold and $D$ is a reduced divisor. We will consider the cases such that $D$
has isolated singularities and also if $D$ has a (not necessarily irreducible)
decomposition $D=D_1\cup D_2$ such that $D_1$, $D_2$ have isolated
singularities and $C=D_1\cap D_2$ is a codimension $2$ variety with isolated
singularities.
|
[{'version': 'v1', 'created': 'Wed, 15 Aug 2018 16:52:27 GMT'}
{'version': 'v2', 'created': 'Thu, 20 Sep 2018 11:06:18 GMT'}
{'version': 'v3', 'created': 'Wed, 8 May 2019 13:48:11 GMT'}
{'version': 'v4', 'created': 'Mon, 9 Nov 2020 17:29:22 GMT'}]
|
2020-11-10
|
[array(['Corrêa', 'Maurício', ''], dtype=object)
array(['Lourenço', 'Fernando', ''], dtype=object)
array(['Machado', 'Diogo', ''], dtype=object)
array(['Ferreira', 'Antonio M.', ''], dtype=object)]
|
4,718 |
0810.4225
|
Nicolas Gillis
|
Nicolas Gillis, Fran\c{c}ois Glineur
|
Nonnegative Factorization and The Maximum Edge Biclique Problem
| null | null | null |
2008/64
|
math.NA math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Nonnegative Matrix Factorization (NMF) is a data analysis technique which
allows compression and interpretation of nonnegative data. NMF became widely
studied after the publication of the seminal paper by Lee and Seung (Learning
the Parts of Objects by Nonnegative Matrix Factorization, Nature, 1999, vol.
401, pp. 788--791), which introduced an algorithm based on Multiplicative
Updates (MU). More recently, another class of methods called Hierarchical
Alternating Least Squares (HALS) was introduced that seems to be much more
efficient in practice.
In this paper, we consider the problem of approximating a not necessarily
nonnegative matrix with the product of two nonnegative matrices, which we refer
to as Nonnegative Factorization (NF); this is the subproblem that HALS methods
implicitly try to solve at each iteration. We prove that NF is NP-hard for any
fixed factorization rank, using a reduction to the maximum edge biclique
problem.
We also generalize the multiplicative updates to NF, which allows us to shed
some light on the differences between the MU and HALS algorithms for NMF and
give an explanation for the better performance of HALS. Finally, we link
stationary points of NF with feasible solutions of the biclique problem to
obtain a new type of biclique finding algorithm (based on MU) whose iterations
have an algorithmic complexity proportional to the number of edges in the
graph, and show that it performs better than comparable existing methods.
|
[{'version': 'v1', 'created': 'Thu, 23 Oct 2008 08:08:36 GMT'}]
|
2008-10-24
|
[array(['Gillis', 'Nicolas', ''], dtype=object)
array(['Glineur', 'François', ''], dtype=object)]
|
4,719 |
2103.09137
|
Gabriel Conant
|
Gabriel Conant, Kyle Gannon, James Hanson
|
Keisler measures in the wild
|
56 pages. Final version incorporating referee comments; minor changes
from previous version (e.g. Prop 4.3, Remark 7.4, Remark 7.16 are new)
|
Model Th. 2 (2023) 1-67
|
10.2140/mt.2023.2.1
| null |
math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate Keisler measures in arbitrary theories. Our initial focus is
on Borel definability. We show that when working over countable parameter sets
in countable theories, Borel definable measures are closed under Morley
products and satisfy associativity. However, we also demonstrate failures of
both properties over uncountable parameter sets. In particular, we show that
the Morley product of Borel definable types need not be Borel definable
(correcting an erroneous result from the literature). We then study various
notions of generic stability for Keisler measures and generalize several
results from the NIP setting to arbitrary theories. We also prove some positive
results for the class of frequency interpretation measures in arbitrary
theories, namely, that such measures are closed under convex combinations and
commute with all Borel definable measures. Finally, we construct the first
example of a complete type which is definable and finitely satisfiable in a
small model, but not finitely approximated over any small model.
|
[{'version': 'v1', 'created': 'Tue, 16 Mar 2021 15:30:50 GMT'}
{'version': 'v2', 'created': 'Tue, 29 Jun 2021 17:03:15 GMT'}
{'version': 'v3', 'created': 'Mon, 13 Mar 2023 17:38:36 GMT'}]
|
2023-06-28
|
[array(['Conant', 'Gabriel', ''], dtype=object)
array(['Gannon', 'Kyle', ''], dtype=object)
array(['Hanson', 'James', ''], dtype=object)]
|
4,720 |
2003.02692
|
Hyeon Cho
|
Hyeon Cho, Taehoon Kim, Hyung Jin Chang, Wonjun Hwang
|
Self-Supervised Visual Learning by Variable Playback Speeds Prediction
of a Video
|
Accepted by IEEE Access on May 19, 2021
| null |
10.1109/ACCESS.2021.3084840
| null |
cs.CV
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We propose a self-supervised visual learning method by predicting the
variable playback speeds of a video. Without semantic labels, we learn the
spatio-temporal visual representation of the video by leveraging the variations
in the visual appearance according to different playback speeds under the
assumption of temporal coherence. To learn the spatio-temporal visual
variations in the entire video, we have not only predicted a single playback
speed but also generated clips of various playback speeds and directions with
randomized starting points. Hence the visual representation can be successfully
learned from the meta information (playback speeds and directions) of the
video. We also propose a new layer dependable temporal group normalization
method that can be applied to 3D convolutional networks to improve the
representation learning performance where we divide the temporal features into
several groups and normalize each one using the different corresponding
parameters. We validate the effectiveness of our method by fine-tuning it to
the action recognition and video retrieval tasks on UCF-101 and HMDB-51.
|
[{'version': 'v1', 'created': 'Thu, 5 Mar 2020 15:01:08 GMT'}
{'version': 'v2', 'created': 'Fri, 21 May 2021 02:39:54 GMT'}]
|
2021-06-02
|
[array(['Cho', 'Hyeon', ''], dtype=object)
array(['Kim', 'Taehoon', ''], dtype=object)
array(['Chang', 'Hyung Jin', ''], dtype=object)
array(['Hwang', 'Wonjun', ''], dtype=object)]
|
4,721 |
2008.00494
|
Stefano Chessa
|
Stefano Chessa, Vittorio Giovannetti
|
Partially Coherent Direct Sum Channels
| null |
Quantum 5, 504 (2021)
|
10.22331/q-2021-07-15-504
| null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We introduce Partially Coherent Direct Sum (PCDS) quantum channels, as a
generalization of the already known Direct Sum quantum channels. We derive
necessary and sufficient conditions to identify the subset of those maps which
are degradable, and provide a simplified expression for their quantum
capacities. Interestingly, the special structure of PCDS allows us to extend
the computation of the quantum capacity formula also for quantum channels which
are explicitly not degradable (nor antidegradable). We show instances of
applications of the results to dephasing channels, amplitude damping channels
and combinations of the two.
|
[{'version': 'v1', 'created': 'Sun, 2 Aug 2020 14:36:11 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Aug 2020 15:09:55 GMT'}
{'version': 'v3', 'created': 'Fri, 12 Feb 2021 14:42:52 GMT'}
{'version': 'v4', 'created': 'Tue, 13 Jul 2021 15:20:55 GMT'}]
|
2021-07-21
|
[array(['Chessa', 'Stefano', ''], dtype=object)
array(['Giovannetti', 'Vittorio', ''], dtype=object)]
|
4,722 |
math/0204122
|
Elliott Pearl
|
Edwin Duda
|
Chainable subcontinua
|
3 pages
|
Proceedings of the Ninth Prague Topological Symposium, (Prague,
2001), pp. 71--73, Topology Atlas, Toronto, 2002}
| null | null |
math.GN
| null |
This paper is concerned with conditions under which a metric continuum (a
compact connected metric space) contains a non-degenerate chainable continuum.
|
[{'version': 'v1', 'created': 'Wed, 10 Apr 2002 16:15:45 GMT'}]
|
2007-05-23
|
[array(['Duda', 'Edwin', ''], dtype=object)]
|
4,723 |
2303.00082
|
John Harter
|
Alex Hallett and Catalina Avarvarei and John W. Harter
|
Combinatorial exploration of quantum spin liquid candidates in the
herbertsmithite material family
| null |
Physical Review Materials 7, 064403 (2023)
|
10.1103/PhysRevMaterials.7.064403
| null |
cond-mat.str-el cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Geometric frustration of magnetic ions can lead to a quantum spin liquid
ground state where long range magnetic order is avoided despite strong exchange
interactions. The physical realization of quantum spin liquids comprises a
major unresolved area of contemporary materials science. One prominent
magnetically-frustrated structure is the kagome lattice. The naturally
occurring minerals herbertsmithite [ZnCu$_3$(OH)$_6$Cl$_2$] and Zn-substituted
barlowite [ZnCu$_3$(OH)$_6$BrF] both feature perfect kagome layers of
spin-$1/2$ copper ions and display experimental signatures consistent with a
quantum spin liquid state at low temperatures. To investigate other possible
candidates within this material family, we perform a systematic
first-principles combinatorial exploration of structurally related compounds
[$A$Cu$_3$(OH)$_6B_2$ and $A$Cu$_3$(OH)$_6BC$] by substituting non-magnetic
divalent cations ($A$) and halide anions ($B$, $C$). After optimizing such
structures using density functional theory, we compare various structural and
thermodynamic parameters to determine which compounds are most likely to favor
a quantum spin liquid state. Convex hull calculations using binary compounds
are performed to determine feasibility of synthesis. We also estimate the
likelihood of interlayer substitutional disorder and spontaneous distortions of
the kagome layers. After considering all of these factors as a whole, we select
several promising candidate materials that we believe deserve further
attention.
|
[{'version': 'v1', 'created': 'Tue, 28 Feb 2023 20:59:17 GMT'}]
|
2023-06-07
|
[array(['Hallett', 'Alex', ''], dtype=object)
array(['Avarvarei', 'Catalina', ''], dtype=object)
array(['Harter', 'John W.', ''], dtype=object)]
|
4,724 |
2211.11730
|
Peihong Gu
|
Pei-Hong Gu
|
Axion from pseudo Goldstone seesaw without Peccei-Quinn symmetry
|
5 pages, 1 figure
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is firmly believed that the axion for solving the strong CP problem must
come from the spontaneous breaking of an anomalous Peccei-Quinn global
symmetry. Here we show a new possibility that the axion can be induced by a
pseudo Goldstone seesaw mechanism although the Peccei-Quinn symmetry is exactly
forbidden. Specifically, after the spontaneous breaking of appropriate gauge
and discrete symmetries, a heavy pseudo Goldstone coupling to colored fermions
is allowed to have a tiny mass mixing with an ultralight pseudo Goldstone. In
our scenario, no symmetry breaking is required to happen above the TeV scale.
This means rich collider phenomena to explore the origin of axion.
|
[{'version': 'v1', 'created': 'Mon, 21 Nov 2022 18:49:28 GMT'}]
|
2022-11-22
|
[array(['Gu', 'Pei-Hong', ''], dtype=object)]
|
4,725 |
1612.00867
|
Bolun Xu
|
Bolun Xu, Andreas Ulbig, Goran Andersson
|
Impact of Dynamic Line Rating on Dispatch Decisions and Integration of
Variable RES Energy
| null | null | null | null |
math.OC cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Dynamic line rating (DLR) models the transmission capacity of overhead lines
as a function of ambient conditions. It takes advantage of the physical thermal
property of overhead line conductors, thus making DLR less conservative
compared to the traditional worst-case oriented nominal line rating (NLR).
Employing DLR brings potential benefits for grid integration of variable
Renewable Energy Sources (RES), such as wind and solar energy. In this paper,
we reproduce weather conditions from renewable feed-ins and local temperature
records, and calculate DLR in accordance with the RES feed-in and load demand
data step. Simulations with high time resolution, using a predictive dispatch
optimization and the Power Node modeling framework, of a six-node benchmark
power system loosely based on the German power system are performed for the
current situation, using actual wind and PV feed-in data. The integration
capability of DLR under high RES production shares is inspected through
simulations with scaled-up RES profiles and reduced dispatchable generation
capacity. The simulation result demonstrates a comparison between DLR and NLR
in terms of reductions in RES generation curtailments and load shedding, while
discussions on the practicality of adopting DLR in the current power system is
given in the end.
|
[{'version': 'v1', 'created': 'Fri, 2 Dec 2016 21:36:32 GMT'}]
|
2016-12-06
|
[array(['Xu', 'Bolun', ''], dtype=object)
array(['Ulbig', 'Andreas', ''], dtype=object)
array(['Andersson', 'Goran', ''], dtype=object)]
|
4,726 |
1910.07092
|
Ra\'ul Felipe Sosa
|
Nancy Lopez Reyes, Raul Felipe-Sosa, Raul Felipe
|
Matrix-valued Laurent polynomials, parametric linear systems and
integrable systems
| null | null | null | null |
nlin.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study transfer functions corresponding to parametric linear
systems whose coefficients are block matrices. Thus, these transfer functions
constitute Laurent polynomials whose coefficients are square matrices. We
assume that block matrices defining the parametric linear systems are solutions
of an integrable hierarchy called for us, the block matrices version of the
finite discrete KP hierarchy, which is introduced and studied with certain
detail in this paper. We see that the linear system defined by means of the
simplest solution of the integrable system is controllable and observable.
Then, as a consequence of this fact, it is possible to verify that any
solution of the integrable hierarchy, obtained by the dressing method of the
simplest solution, defines a parametric linear system which is also
controllable and observable.
|
[{'version': 'v1', 'created': 'Tue, 15 Oct 2019 22:57:35 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Mar 2020 23:37:15 GMT'}]
|
2020-03-05
|
[array(['Reyes', 'Nancy Lopez', ''], dtype=object)
array(['Felipe-Sosa', 'Raul', ''], dtype=object)
array(['Felipe', 'Raul', ''], dtype=object)]
|
4,727 |
cond-mat/0412595
|
Branislav Nikolic
|
Branislav K. Nikolic, Satofumi Souma, Liviu P. Zarbo, and Jairo Sinova
|
Can Non-Equilibrium Spin Hall Accumulation be Induced in Ballistic
Nanostructures?
|
5 pages, 3 color EPS figures; published version
|
Phys. Rev. Lett. 95, 046601 (2005)
|
10.1103/PhysRevLett.95.046601
| null |
cond-mat.mes-hall
| null |
We demonstrate that flow of longitudinal unpolarized current through a
ballistic two-dimensional electron gas with Rashba spin-orbit coupling will
induce nonequilibrium spin accumulation which has opposite sign for the two
lateral edges and it is, therefore, the principal observable signature of the
spin Hall effect in two-probe semiconductor nanostructures. The magnitude of
its out-of-plane component is gradually diminished by static disorder, while it
can be enhanced by an in-plane transverse magnetic field. Moreover, our
prediction of the longitudinal component of the spin Hall accumulation, which
is insensitive to the reversal of the bias voltage, offers a smoking gun to
differentiate experimentally between the extrinsic, intrinsic, and mesoscopic
spin Hall mechanisms.
|
[{'version': 'v1', 'created': 'Wed, 22 Dec 2004 01:10:15 GMT'}
{'version': 'v2', 'created': 'Thu, 14 Apr 2005 20:07:41 GMT'}
{'version': 'v3', 'created': 'Wed, 20 Jul 2005 21:05:16 GMT'}]
|
2007-05-23
|
[array(['Nikolic', 'Branislav K.', ''], dtype=object)
array(['Souma', 'Satofumi', ''], dtype=object)
array(['Zarbo', 'Liviu P.', ''], dtype=object)
array(['Sinova', 'Jairo', ''], dtype=object)]
|
4,728 |
1809.01644
|
Savvas Zannettou
|
Savvas Zannettou, Joel Finkelstein, Barry Bradlyn, Jeremy Blackburn
|
A Quantitative Approach to Understanding Online Antisemitism
|
To appear at the 14th International AAAI Conference on Web and Social
Media (ICWSM 2020). Please cite accordingly
|
Proceedings of the International AAAI Conference on Web and Social
Media, 14(1), 786-797 (2020)
| null | null |
cs.CY cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A new wave of growing antisemitism, driven by fringe Web communities, is an
increasingly worrying presence in the socio-political realm. The ubiquitous and
global nature of the Web has provided tools used by these groups to spread
their ideology to the rest of the Internet. Although the study of antisemitism
and hate is not new, the scale and rate of change of online data has impacted
the efficacy of traditional approaches to measure and understand these
troubling trends. In this paper, we present a large-scale, quantitative study
of online antisemitism. We collect hundreds of million posts and images from
alt-right Web communities like 4chan's Politically Incorrect board (/pol/) and
Gab. Using scientifically grounded methods, we quantify the escalation and
spread of antisemitic memes and rhetoric across the Web. We find the frequency
of antisemitic content greatly increases (in some cases more than doubling)
after major political events such as the 2016 US Presidential Election and the
"Unite the Right" rally in Charlottesville. We extract semantic embeddings from
our corpus of posts and demonstrate how automated techniques can discover and
categorize the use of antisemitic terminology. We additionally examine the
prevalence and spread of the antisemitic "Happy Merchant" meme, and in
particular how these fringe communities influence its propagation to more
mainstream communities like Twitter and Reddit. Taken together, our results
provide a data-driven, quantitative framework for understanding online
antisemitism. Our methods serve as a framework to augment current qualitative
efforts by anti-hate groups, providing new insights into the growth and spread
of hate online.
|
[{'version': 'v1', 'created': 'Wed, 5 Sep 2018 17:45:23 GMT'}
{'version': 'v2', 'created': 'Sun, 24 Nov 2019 13:25:35 GMT'}]
|
2021-01-12
|
[array(['Zannettou', 'Savvas', ''], dtype=object)
array(['Finkelstein', 'Joel', ''], dtype=object)
array(['Bradlyn', 'Barry', ''], dtype=object)
array(['Blackburn', 'Jeremy', ''], dtype=object)]
|
4,729 |
1704.01201
|
Xing Wang
|
Xing Wang, Ming-Jie Zheng, Izabela Szlufarska and Dane Morgan
|
Continuum model for hydrogen pickup in Zirconium alloys of LWR fuel
cladding
|
33 pages, 4 figures
| null |
10.1063/1.4979472
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A continuum model for calculating the time-dependent hydrogen pickup
fractions in various Zirconium alloys under steam and pressured water oxidation
has been developed in this study. Using only one fitting parameter, the
effective hydrogen gas partial pressure at the oxide surface, a qualitative
agreement is obtained between the predicted and previously measured hydrogen
pickup fractions. The calculation results therefore demonstrate that H
diffusion through the dense oxide layer plays an important role in the hydrogen
pickup process. The limitations and possible improvement of the model are also
discussed.
|
[{'version': 'v1', 'created': 'Tue, 4 Apr 2017 21:54:58 GMT'}]
|
2017-04-26
|
[array(['Wang', 'Xing', ''], dtype=object)
array(['Zheng', 'Ming-Jie', ''], dtype=object)
array(['Szlufarska', 'Izabela', ''], dtype=object)
array(['Morgan', 'Dane', ''], dtype=object)]
|
4,730 |
2105.07298
|
Enzo Rucci
|
Manuel Costanzo and Enzo Rucci and Ulises Costi and Franco Chichizola
and Marcelo Naiouf
|
Comparison of HPC Architectures for Computing All-Pairs Shortest Paths.
Intel Xeon Phi KNL vs NVIDIA Pascal
|
Computer Science - CACIC 2020. CACIC 2020. Communications in Computer
and Information Science, vol 1409. Springer, Cham
| null |
10.1007/978-3-030-75836-3_3
| null |
cs.DC
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Today, one of the main challenges for high-performance computing systems is
to improve their performance by keeping energy consumption at acceptable
levels. In this context, a consolidated strategy consists of using accelerators
such as GPUs or many-core Intel Xeon Phi processors. In this work, devices of
the NVIDIA Pascal and Intel Xeon Phi Knights Landing architectures are
described and compared. Selecting the Floyd-Warshall algorithm as a
representative case of graph and memory-bound applications, optimized
implementations were developed to analyze and compare performance and energy
efficiency on both devices. As it was expected, Xeon Phi showed superior when
considering double-precision data. However, contrary to what was considered in
our preliminary analysis, it was found that the performance and energy
efficiency of both devices were comparable using single-precision datatype.
|
[{'version': 'v1', 'created': 'Sat, 15 May 2021 22:01:37 GMT'}]
|
2021-05-18
|
[array(['Costanzo', 'Manuel', ''], dtype=object)
array(['Rucci', 'Enzo', ''], dtype=object)
array(['Costi', 'Ulises', ''], dtype=object)
array(['Chichizola', 'Franco', ''], dtype=object)
array(['Naiouf', 'Marcelo', ''], dtype=object)]
|
4,731 |
1410.7341
|
Christian Zillinger
|
Christian Zillinger
|
Linear Inviscid Damping for Monotone Shear Flows
|
53 pages, 6 figures. Updated version
| null | null | null |
math.AP math-ph math.MP physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we prove linear stability, scattering and inviscid damping
with optimal decay rates for the linearized 2D Euler equations around a large
class of strictly monotone shear flows, $(U(y),0)$, in a periodic channel under
Sobolev perturbations. Here, we consider the settings of both an infinite
periodic channel of period $L$, $\mathbb{T}_{L}\times \mathbb{R}$, as well as a
finite periodic channel, $\mathbb{T}_{L} \times [0,1]$, with impermeable walls.
The latter setting is shown to not only be technically more challenging, but to
exhibit qualitatively different behavior due to boundary effects.
|
[{'version': 'v1', 'created': 'Mon, 27 Oct 2014 18:29:20 GMT'}
{'version': 'v2', 'created': 'Fri, 12 Jun 2015 12:47:59 GMT'}]
|
2015-06-15
|
[array(['Zillinger', 'Christian', ''], dtype=object)]
|
4,732 |
1011.5655
|
Diego Turrini
|
D. Turrini, F. Marzari, H. Beust
|
A new perspective on the irregular satellites of Saturn - I Dynamical
and collisional history
|
26 Pages, 27 Figures, 4 Tables
|
Monthly Notices of the Royal Astronomical Society, 2008, Volume
391, Issue 3, pp. 1029-1051
|
10.1111/j.1365-2966.2008.13909.x
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The dynamical features of the irregular satellites of the giant planets argue
against an in-situ formation and are strongly suggestive of a capture origin.
Since the last detailed investigations of their dynamics, the total number of
satellites have doubled, increasing from 50 to 109, and almost tripled in the
case of Saturn system. We have performed a new dynamical exploration of Saturn
system to test whether the larger sample of bodies could improve our
understanding of which dynamical features are primordial and which are the
outcome of the secular evolution of the system. We have performed detailed
N--Body simulations using the best orbital data available and analysed the
frequencies of motion to search for resonances and other possible perturbing
effects. We took advantage of the Hierarchical Jacobian Symplectic algorithm to
include in the dynamical model of the system also the gravitational effects of
the two outermost massive satellites, Titan and Iapetus. Our results suggest
that Saturn's irregular satellites have been significantly altered and shaped
by the gravitational perturbations of Jupiter, Titan, Iapetus and the Sun and
by the collisional sweeping effect of Phoebe. In particular, the effects on the
dynamical evolution of the system of the two massive satellites appear to be
non-negligible. Jupiter perturbs the satellites through its direct
gravitational pull and, indirectly, via the effects of the Great Inequality,
i.e. its almost resonance with Saturn. Finally, by using the Hierarchical
Clustering Method we found hints to the existence of collisional families and
compared them with the available observational data.
|
[{'version': 'v1', 'created': 'Thu, 25 Nov 2010 17:28:04 GMT'}]
|
2010-11-29
|
[array(['Turrini', 'D.', ''], dtype=object)
array(['Marzari', 'F.', ''], dtype=object)
array(['Beust', 'H.', ''], dtype=object)]
|
4,733 |
2106.01511
|
Shuiyao Huang
|
Shuiyao Huang, Neal Katz, J'Neil Cottle, Evan Scannapieco, Romeel
Dav\'e and David H. Weinberg
|
A New Model For Including Galactic Winds in Simulations of Galaxy
Formation II: Implementation of PhEW in Cosmological Simulations
|
23 pages, 17 figures, MNRAS accepted
| null |
10.1093/mnras/stab3363
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by/4.0/
|
Although galactic winds play a critical role in regulating galaxy formation,
hydrodynamic cosmological simulations do not resolve the scales that govern the
interaction between winds and the ambient circumgalactic medium (CGM). We
implement the Physically Evolved Wind (PhEW) model of Huang et al. (2020) in
the GIZMO hydrodynamics code and perform test cosmological simulations with
different choices of model parameters and numerical resolution. PhEW adopts an
explicit subgrid model that treats each wind particle as a collection of clouds
that exchange mass, metals, and momentum with their surroundings and evaporate
by conduction and hydrodynamic instabilities as calibrated on much higher
resolution cloud scale simulations. In contrast to a conventional wind
algorithm, we find that PhEW results are robust to numerical resolution and
implementation details because the small scale interactions are defined by the
model itself. Compared to conventional wind simulations with the same
resolution, our PhEW simulations produce similar galaxy stellar mass functions
at $z\geq 1$ but are in better agreement with low-redshift observations at $M_*
< 10^{11}M_\odot$ because PhEW particles shed mass to the CGM before escaping
low mass halos. PhEW radically alters the CGM metal distribution because PhEW
particles disperse metals to the ambient medium as their clouds dissipate,
producing a CGM metallicity distribution that is skewed but unimodal and is
similar between cold and hot gas. While the temperature distributions and
radial profiles of gaseous halos are similar in simulations with PhEW and
conventional winds, these changes in metal distribution will affect their
predicted UV/X-ray properties in absorption and emission.
|
[{'version': 'v1', 'created': 'Thu, 3 Jun 2021 00:00:49 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Nov 2021 04:43:37 GMT'}
{'version': 'v3', 'created': 'Wed, 23 Feb 2022 03:13:58 GMT'}]
|
2022-02-24
|
[array(['Huang', 'Shuiyao', ''], dtype=object)
array(['Katz', 'Neal', ''], dtype=object)
array(['Cottle', "J'Neil", ''], dtype=object)
array(['Scannapieco', 'Evan', ''], dtype=object)
array(['Davé', 'Romeel', ''], dtype=object)
array(['Weinberg', 'David H.', ''], dtype=object)]
|
4,734 |
hep-ph/0005319
|
Miroslav Pardy
|
Miroslav Pardy
|
Quantum Field Theory of the Laser Acceleration
|
8p
| null | null |
MUNI 2000/5
|
hep-ph
| null |
After the historical background concerning the pressure of light, we derive
the quantum field theory force of the laser radiation acting on electron.
Numerically, we determine the velocity of an electron accelerated by laser
beam, after acceleration time $\Delta t = 1 {\rm s}$.
|
[{'version': 'v1', 'created': 'Wed, 31 May 2000 12:55:00 GMT'}]
|
2007-05-23
|
[array(['Pardy', 'Miroslav', ''], dtype=object)]
|
4,735 |
2104.15065
|
Harmen Wierenga
|
Harmen Wierenga and Pieter Rein ten Wolde
|
Energetic constraints on filament mediated cell polarization
|
20 pages, 12 figures
| null |
10.1103/PhysRevE.105.064406
| null |
physics.bio-ph cond-mat.stat-mech q-bio.SC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cell polarization underlies many cellular processes, such as differentiation,
migration, and budding. Many living cells, such as budding yeast and fission
yeast, use cytoskeletal structures to actively transport proteins to one
location on the membrane and create a high density spot of membrane-bound
proteins. Yet, the thermodynamic constraints on filament-based cell
polarization remain unknown. We show by mathematical modeling that cell
polarization requires detailed balance to be broken, and we quantify the
free-energy cost of maintaining a polarized state of the cell. Our study
reveals that detailed balance cannot only be broken via the active transport of
proteins along filaments, but also via a chemical modification cycle, allowing
detailed balance to be broken by the shuttling of proteins between the
filament, membrane, and cytosol. Our model thus shows that cell polarization
can be established via two distinct driving mechanisms, one based on active
transport and one based on non-equilibrium binding. Furthermore, the model
predicts that the driven binding process dissipates orders of magnitude less
free-energy than the transport-based process to create the same membrane spot.
Active transport along filaments may be sufficient to create a polarized
distribution of membrane-bound proteins, but an additional chemical
modification cycle of the proteins themselves is more efficient and less
sensitive to the physical exclusion of proteins on the transporting filaments,
providing insight in the design principles of the Pom1/Tea1/Tea4 system in
fission yeast and the Cdc42 system in budding yeast.
|
[{'version': 'v1', 'created': 'Fri, 30 Apr 2021 15:33:26 GMT'}]
|
2022-06-22
|
[array(['Wierenga', 'Harmen', ''], dtype=object)
array(['Wolde', 'Pieter Rein ten', ''], dtype=object)]
|
4,736 |
0710.2490
|
Philipp Kant
|
Philipp Kant
|
Dimensional Reduction Applied to Non-Supersymmetric Theories
|
Submitted for the SUSY07 proceedings, 3 pages
| null | null |
TTP07-28
|
hep-th
| null |
We consider regularisation of a Yang-Mills theory by Dimensional Reduction
(DRED). In particular, the anomalous dimensions of fermion masses and gauge
coupling are computed to four-loop order. We put special emphasis on the
treatment of evanescent couplings which appear when DRED is applied to
non-supersymmetric theories. We highlight the importance of distinguishing
between the evanescent and the real couplings. Considering the special case of
a Super-Yang-Mills theory, we find that Dimensional Reduction is sufficient to
preserve Supersymmetry in our calculations.
|
[{'version': 'v1', 'created': 'Fri, 12 Oct 2007 15:56:01 GMT'}]
|
2007-10-15
|
[array(['Kant', 'Philipp', ''], dtype=object)]
|
4,737 |
2209.06263
|
Bikash Thapa
|
Bikash Thapa and Ng. K. Francis
|
Connecting low-energy CP violation, resonant leptogenesis and
neutrinoless double beta decay in a radiative seesaw model
|
12 pages, 3 figures
| null |
10.1016/j.nuclphysb.2022.116054
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We present a study of resonant leptogenesis in a radiative seesaw model. We
consider the case where two quasi-degenerate right-handed neutrinos realize
resonant leptogenesis, and the CP violation necessary to achieve leptogenesis
occurs through the CP phases present in the neutrino mixing matrix. A numerical
analysis is performed by taking the best-fit values from the current global
data for three neutrino mixing angles and two mass-squared differences. We have
shown how the predicted value of baryon asymmetry depends on the Dirac and
Majorana CP phases. With the particular choice for the mass parameters, this
model prefers a normal hierarchy of neutrino masses based on the value of
baryon asymmetry predicted. Using the constrained CP phases, we evaluate the
effective neutrino mass, which is relevant to the neutrinoless double beta
decay.
|
[{'version': 'v1', 'created': 'Tue, 13 Sep 2022 19:07:14 GMT'}]
|
2023-01-11
|
[array(['Thapa', 'Bikash', ''], dtype=object)
array(['Francis', 'Ng. K.', ''], dtype=object)]
|
4,738 |
2211.02162
|
Shuyang Cao
|
Shuyang Cao and Lu Wang
|
Time-aware Prompting for Text Generation
|
EMNLP 2022 Findings (short paper)
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study the effects of incorporating timestamps, such as
document creation dates, into generation systems. Two types of time-aware
prompts are investigated: (1) textual prompts that encode document timestamps
in natural language sentences; and (2) linear prompts that convert timestamps
into continuous vectors. To explore extrapolation to future data points, we
further introduce a new data-to-text generation dataset, TempWikiBio,
containing more than 4 millions of chronologically ordered revisions of
biographical articles from English Wikipedia, each paired with structured
personal profiles. Through data-to-text generation on TempWikiBio, text-to-text
generation on the content transfer dataset, and summarization on XSum, we show
that linear prompts on encoder and textual prompts improve the generation
quality on all datasets. Despite having less performance drop when testing on
data drawn from a later time, linear prompts focus more on non-temporal
information and are less sensitive to the given timestamps, according to human
evaluations and sensitivity analyses. Meanwhile, textual prompts establish the
association between the given timestamps and the output dates, yielding more
factual temporal information in the output.
|
[{'version': 'v1', 'created': 'Thu, 3 Nov 2022 22:10:25 GMT'}]
|
2022-11-07
|
[array(['Cao', 'Shuyang', ''], dtype=object)
array(['Wang', 'Lu', ''], dtype=object)]
|
4,739 |
2301.09233
|
R\'emi Perrier
|
R\'emi Perrier, Hendrik Schawe and Laura Hern\'andez
|
On the side-effects of compromising: coupling agents' heterogeneity with
network effects on a bounded confidence opinion dynamics model
|
22 pages, 20 figures, supplementary material included, data and
videos are available at: https://doi.org/10.5281/zenodo.7455640
| null | null | null |
physics.soc-ph cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an extensive study of the joint effects of heterogeneous social
agents and their heterogeneous social links in a bounded confidence opinion
dynamics model. The full phase diagram of the model is explored for two
different network's topologies and compared to two opposed extreme cases: on
one hand heterogeneous agents which constitute a mixed population and on the
other, their interactions are modeled by a lattice. The results show that when
agents prone to compromising coexist with close minded ones, the steady state
of the dynamics shows coexistent phases. In particular, unlike the homogeneous
case in networks, or the heterogeneous case in fully mixed population, it is
possible that the society ends up in consensus around one extreme opinion.
Moreover, during the dynamics, the consensus may be overturned from one extreme
to the other of the opinion space. We also show that the standard order
parameter, the normalized average size of the largest opinion cluster, may be
misleading in this case, as it hides the existence of these phases. The phase
where the opinion of the society is overturned does not require the presence of
agents with special characteristics, (stubborn, extremists, etc.); it results
from the interplay of agents which have agreed on an extreme opinion with the
remaining group that holds the opposite one. Among the former, some may be
prone to compromising with other agents which are out of the majority group,
these agents, according to their location in the network, may act like bridges
between the two groups and slowly attract the whole society to the other
extreme.
|
[{'version': 'v1', 'created': 'Mon, 23 Jan 2023 00:34:14 GMT'}]
|
2023-01-24
|
[array(['Perrier', 'Rémi', ''], dtype=object)
array(['Schawe', 'Hendrik', ''], dtype=object)
array(['Hernández', 'Laura', ''], dtype=object)]
|
4,740 |
2102.01016
|
Daniel Mutter
|
Cong Tao (1 and 2), Daniel Mutter (1), Daniel F. Urban (1), Christian
Els\"asser (1 and 3) ((1) Fraunhofer IWM, Freiburg, Germany (2) Institute of
Applied Materials-Computational Materials Science (IAM-CMS), Karlsruhe
Institute of Technology, Karlsruhe, Germany (3) Freiburg Materials Research
Center (FMF), University of Freiburg, Freiburg, Germany)
|
Atomistic calculations of charged point defects at grain boundaries in
SrTiO$_3$
|
31 pages, 12 figures
|
Phys. Rev. B 104, 054114 (2021)
|
10.1103/PhysRevB.104.054114
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Oxygen vacancies have been identified to play an important role in
accelerating grain growth in polycrystalline perovskite-oxide ceramics. In
order to advance the fundamental understanding of growth mechanisms at the
atomic scale, classical atomistic simulations were carried out to investigate
the atomistic structures and oxygen vacancy formation energies at grain
boundaries in the prototypical perovskite-oxide material SrTiO$_3$. In this
work, we focus on two symmetric tilt grain boundaries, namely
$\Sigma$5(310)[001] and $\Sigma$5(210)[001]. A one-dimensional continuum model
is adapted to determine the electrostatic potential induced by charged lattice
planes in atomistic structure models containing grain boundaries and point
defects. By means of this model, electrostatic artifacts, which are inherent to
supercell models with periodic or open boundary conditions, can be taken into
account and corrected properly. We report calculated formation energies of
oxygen vacancies on all the oxygen sites across boundaries between two
misoriented grains, and we analyze and discuss the formation-energy values with
respect to local charge densities at the vacant sites.
|
[{'version': 'v1', 'created': 'Mon, 1 Feb 2021 17:48:34 GMT'}
{'version': 'v2', 'created': 'Thu, 19 Aug 2021 08:29:21 GMT'}]
|
2021-08-25
|
[array(['Tao', 'Cong', '', '1 and 2'], dtype=object)
array(['Mutter', 'Daniel', '', '1 and 3'], dtype=object)
array(['Urban', 'Daniel F.', '', '1 and 3'], dtype=object)
array(['Elsässer', 'Christian', '', '1 and 3'], dtype=object)]
|
4,741 |
cond-mat/0404165
|
Enis Tuncer
|
Enis Tuncer and Michael Wegener
|
Elastic properties of cellular polypropylene films: Finite element
simulations and their comparison with experiments
|
7 figures and 2 tables
| null | null | null |
cond-mat.soft cond-mat.mtrl-sci
| null |
The Young's modulus of a two-dimensional truss-like structure is simulated by
using the finite element method. A power-law expression is proposed for the
effective Young's modulus of the system. The obtained numerical results are
compared with the experimental data of the {\em anisotropic thin cellular
polypropylene films}. At high solid volume fractions ($>0.4$), the average
shape of the cells are lateral, and their dimensions have around one-to-five
ratio. As the samples are inflated further, volume fraction of the solid is
decreased, the average shape approach a diamond-like structure with one-to-two
ratio. In addition the effective Young's modulus of the system increases. It is
concluded that valuable structural information can be obtained by analyzing the
experimental data and the numerical simulations, which take into account the
material's micro-structural information, simultaneously.
|
[{'version': 'v1', 'created': 'Wed, 7 Apr 2004 12:03:10 GMT'}]
|
2007-05-23
|
[array(['Tuncer', 'Enis', ''], dtype=object)
array(['Wegener', 'Michael', ''], dtype=object)]
|
4,742 |
1001.1777
|
Mark Wilde
|
Mark M. Wilde and Ari Mizel
|
Addressing the clumsiness loophole in a Leggett-Garg test of
macrorealism
|
7 pages, 3 figures
|
Foundations of Physics vol. 42, no. 2, pages 256-265 (February
2012)
|
10.1007/s10701-011-9598-4
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The rise of quantum information theory has lent new relevance to experimental
tests for non-classicality, particularly in controversial cases such as
adiabatic quantum computing superconducting circuits. The Leggett-Garg
inequality is a "Bell inequality in time" designed to indicate whether a single
quantum system behaves in a macrorealistic fashion. Unfortunately, a violation
of the inequality can only show that the system is either (i)
non-macrorealistic or (ii) macrorealistic but subjected to a measurement
technique that happens to disturb the system. The "clumsiness" loophole (ii)
provides reliable refuge for the stubborn macrorealist, who can invoke it to
brand recent experimental and theoretical work on the Leggett-Garg test
inconclusive. Here, we present a revised Leggett-Garg protocol that permits one
to conclude that a system is either (i) non-macrorealistic or (ii)
macrorealistic but with the property that two seemingly non-invasive
measurements can somehow collude and strongly disturb the system. By providing
an explicit check of the invasiveness of the measurements, the protocol
replaces the clumsiness loophole with a significantly smaller "collusion"
loophole.
|
[{'version': 'v1', 'created': 'Tue, 12 Jan 2010 16:08:38 GMT'}
{'version': 'v2', 'created': 'Sat, 15 May 2010 04:14:01 GMT'}
{'version': 'v3', 'created': 'Sat, 19 Mar 2011 17:08:23 GMT'}
{'version': 'v4', 'created': 'Tue, 16 Aug 2011 15:00:36 GMT'}]
|
2015-03-13
|
[array(['Wilde', 'Mark M.', ''], dtype=object)
array(['Mizel', 'Ari', ''], dtype=object)]
|
4,743 |
1104.0675
|
Adriana Banu
|
A. Banu, L. Trache, F. Carstoiu, NL Achouri, A Bonaccorso, WN Catford,
M Chartier, M Dimmock, B Fernandez-Dominguez, M Freer, L Gaudefroy, M Horoi,
M Labiche, B Laurent, RC Lemmon, F Negoita, NA Orr, S Paschalis, N Patterson,
ES Paul, M Petri, B Pietras, BT Roeder, F Rotaru, P Roussel-Chomaz, E
Simmons, GS Thomas, RE Tribble
|
Structure of 23Al from one-proton breakup reaction and astrophysical
implications
|
8 pages, 4 figures submitted to PRC, March 2 2011
|
Phys.Rev.C84:015803,2011
|
10.1103/PhysRevC.84.015803
| null |
nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The ground state of the proton-rich nucleus 23Al has been studied by
one-proton removal on a carbon target at about 50 MeV/nucleon using the EXOGAM
+ SPEG experimental setup at GANIL. Longitudinal momentum distributions of the
22Mg breakup fragments, inclusive and in coincidence with gamma rays
de-exciting the residues, were measured. The ground-state structure of 23Al is
found to be a configuration mixing of a d-orbital valence proton coupled to
four core states - 0$^{+}_{gs}$, 2$^{+}_{1}$, 4$^{+}_{1}$, 4$^{+}_{2}$. We
confirm the ground state spin and parity of 23Al as $J^{\pi} = 5/2^{+}$. The
measured exclusive momentum distributions are compared with extended Glauber
model calculations to extract spectroscopic factors and asymptotic
normalization coefficients (ANCs). The spectroscopic factors are presented in
comparison with those obtained from large-scale shell model calculations. We
determined the asymptotic normalization coefficient of the nuclear system
$^{23}$Al$_{gs}$ $\rightarrow$ $^{22}$Mg(0$^{+}$) + p to be
$C^{2}_{d_{5/2}}$($^{23}Al_{gs}$) = (3.90 $\pm$ 0.44) $\times$ 10$^{3}$
fm$^{-1}$, and used it to infer the stellar reaction rate of the direct
radiative proton capture $^{22}$Mg(p,$\gamma$)$^{23}$Al. Astrophysical
implications related to $^{22}$Na nucleosynthesis in ONe novae and the use of
one-nucleon breakup at intermediate energies as an indirect method in nuclear
astrophysics are discussed.
|
[{'version': 'v1', 'created': 'Mon, 4 Apr 2011 20:07:02 GMT'}
{'version': 'v2', 'created': 'Sun, 10 Apr 2011 23:03:36 GMT'}]
|
2011-08-22
|
[array(['Banu', 'A.', ''], dtype=object)
array(['Trache', 'L.', ''], dtype=object)
array(['Carstoiu', 'F.', ''], dtype=object)
array(['Achouri', 'NL', ''], dtype=object)
array(['Bonaccorso', 'A', ''], dtype=object)
array(['Catford', 'WN', ''], dtype=object)
array(['Chartier', 'M', ''], dtype=object)
array(['Dimmock', 'M', ''], dtype=object)
array(['Fernandez-Dominguez', 'B', ''], dtype=object)
array(['Freer', 'M', ''], dtype=object)
array(['Gaudefroy', 'L', ''], dtype=object)
array(['Horoi', 'M', ''], dtype=object)
array(['Labiche', 'M', ''], dtype=object)
array(['Laurent', 'B', ''], dtype=object)
array(['Lemmon', 'RC', ''], dtype=object)
array(['Negoita', 'F', ''], dtype=object)
array(['Orr', 'NA', ''], dtype=object)
array(['Paschalis', 'S', ''], dtype=object)
array(['Patterson', 'N', ''], dtype=object)
array(['Paul', 'ES', ''], dtype=object)
array(['Petri', 'M', ''], dtype=object)
array(['Pietras', 'B', ''], dtype=object)
array(['Roeder', 'BT', ''], dtype=object)
array(['Rotaru', 'F', ''], dtype=object)
array(['Roussel-Chomaz', 'P', ''], dtype=object)
array(['Simmons', 'E', ''], dtype=object)
array(['Thomas', 'GS', ''], dtype=object)
array(['Tribble', 'RE', ''], dtype=object)]
|
4,744 |
1804.08959
|
Arjaldo Karaj
|
Arjaldo Karaj, Sam Macbeth, R\'emi Berson, Josep M. Pujol
|
WhoTracks .Me: Shedding light on the opaque world of online tracking
|
15 pages, 12 figures
| null | null | null |
cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Online tracking has become of increasing concern in recent years, however our
understanding of its extent to date has been limited to snapshots from web
crawls. Previous at-tempts to measure the tracking ecosystem, have been done
using instrumented measurement platforms, which are not able to accurately
capture how people interact with the web. In this work we present a method for
the measurement of tracking in the web through a browser extension, as well as
a method for the aggregation and collection of this information which protects
the privacy of participants. We deployed this extension to more than 5 million
users, enabling measurement across multiple countries, ISPs and browser
configurations, to give an accurate picture of real-world tracking. The result
is the largest and longest measurement of online tracking to date based on real
users, covering 1.5 billion page loads gathered over 12 months. The data,
detailing tracking behaviour over a year, is made publicly available to help
drive transparency around online tracking practices.
|
[{'version': 'v1', 'created': 'Tue, 24 Apr 2018 11:21:06 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Apr 2019 12:16:49 GMT'}]
|
2020-07-07
|
[array(['Karaj', 'Arjaldo', ''], dtype=object)
array(['Macbeth', 'Sam', ''], dtype=object)
array(['Berson', 'Rémi', ''], dtype=object)
array(['Pujol', 'Josep M.', ''], dtype=object)]
|
4,745 |
astro-ph/9601129
|
Jes Madsen
|
Jes Madsen (University of Aarhus, Denmark)
|
Is Her X-1 a strange star?
|
3 pages, REVTeX. No figures. Submitted to Astron.Astrophys.(Lett.)
|
Astron.Astrophys.318:466,1997
| null | null |
astro-ph
| null |
The possible identification of Her X-1 with a strange star (Li et al. 1995)
is shown to be incorrect.
|
[{'version': 'v1', 'created': 'Tue, 23 Jan 1996 15:11:42 GMT'}]
|
2011-05-23
|
[array(['Madsen', 'Jes', '', 'University of Aarhus, Denmark'], dtype=object)]
|
4,746 |
quant-ph/0611152
|
Roberto Passante
|
R. Messina, R. Passante
|
Casimir-Polder force density between an atom and a conducting wall
|
5 pages
|
Phys. Rev. A 75, 042113 (2007)
|
10.1103/PhysRevA.75.042113
| null |
quant-ph
| null |
In this paper we calculate the Casimir-Polder force density (force per unit
area acting on the elements of the surface) on a metallic plate placed in front
of a neutral atom. To obtain the force density we use the quantum operator
associated to the electromagnetic stress tensor. We explicitly show that the
integral of this force density over the plate reproduces the total force acting
on the plate. This result shows that, although the force is obtained as a sum
of surface element-atom contributions, the stress-tensor method includes also
nonadditive components of Casimir-Polder forces in the evaluation of the force
acting on a macroscopic object.
|
[{'version': 'v1', 'created': 'Tue, 14 Nov 2006 11:34:26 GMT'}]
|
2009-11-13
|
[array(['Messina', 'R.', ''], dtype=object)
array(['Passante', 'R.', ''], dtype=object)]
|
4,747 |
1806.00323
|
Benjamin Sacepe
|
Thomas Dubouchet, Benjamin Sac\'ep\'e, Johanna Seidemann, Dan Shahar,
Marc Sanquer, Claude Chapelier
|
Collective energy gap of preformed Cooper-pairs in disordered
superconductors
|
Main text + SI
| null |
10.1038/s41567-018-0365-8
| null |
cond-mat.supr-con cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In most superconductors the transition to the superconducting state is driven
by the binding of electrons into Cooper-pairs. The condensation of these pairs
into a single, phase coherent, quantum state takes place concomitantly with
their formation at the transition temperature, $T_c$. A different scenario
occurs in some disordered, amorphous, superconductors: Instead of a
pairing-driven transition, incoherent Cooper pairs first pre-form above $T_c$,
causing the opening of a pseudogap, and then, at $T_c$, condense into the phase
coherent superconducting state. Such a two-step scenario implies the existence
of a new energy scale, $\Delta_{c}$, driving the collective superconducting
transition of the preformed pairs. Here we unveil this energy scale by means of
Andreev spectroscopy in superconducting thin films of amorphous indium oxide.
We observe two Andreev conductance peaks at $\pm \Delta_{c}$ that develop only
below $T_c$ and for highly disordered films on the verge of the transition to
insulator. Our findings demonstrate that amorphous superconducting films
provide prototypical disordered quantum systems to explore the collective
superfluid transition of preformed Cooper-pairs pairs.
|
[{'version': 'v1', 'created': 'Fri, 1 Jun 2018 12:58:46 GMT'}]
|
2019-03-27
|
[array(['Dubouchet', 'Thomas', ''], dtype=object)
array(['Sacépé', 'Benjamin', ''], dtype=object)
array(['Seidemann', 'Johanna', ''], dtype=object)
array(['Shahar', 'Dan', ''], dtype=object)
array(['Sanquer', 'Marc', ''], dtype=object)
array(['Chapelier', 'Claude', ''], dtype=object)]
|
4,748 |
1508.07929
|
Yves Atchade F
|
Yves F. Atchad\'e
|
On the contraction properties of some high-dimensional quasi-posterior
distributions
|
38 pages. Minor modifications from previous version
| null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the contraction properties of a quasi-posterior distribution
$\check\Pi_{n,d}$ obtained by combining a quasi-likelihood function and a
sparsity inducing prior distribution on $\rset^d$, as both $n$ (the sample
size), and $d$ (the dimension of the parameter) increase. We derive some
general results that highlight a set of sufficient conditions under which
$\check\Pi_{n,d}$ puts increasingly high probability on sparse subsets of
$\rset^d$, and contracts towards the true value of the parameter. We apply
these results to the analysis of logistic regression models, and binary
graphical models, in high-dimensional settings. For the logistic regression
model, we shows that for well-behaved design matrices, the posterior
distribution contracts at the rate $O(\sqrt{s_\star\log(d)/n})$, where
$s_\star$ is the number of non-zero components of the parameter. For the binary
graphical model, under some regularity conditions, we show that a
quasi-posterior analog of the neighborhood selection of \cite{meinshausen06}
contracts in the Frobenius norm at the rate $O(\sqrt{(p+S)\log(p)/n})$, where
$p$ is the number of nodes, and $S$ the number of edges of the true graph.
|
[{'version': 'v1', 'created': 'Mon, 31 Aug 2015 17:38:40 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Sep 2015 17:20:18 GMT'}
{'version': 'v3', 'created': 'Sun, 26 Jun 2016 13:06:05 GMT'}
{'version': 'v4', 'created': 'Sat, 19 Nov 2016 20:48:33 GMT'}]
|
2016-11-22
|
[array(['Atchadé', 'Yves F.', ''], dtype=object)]
|
4,749 |
1307.2729
|
Qi Zhang S.
|
Qi S Zhang
|
On the question of diameter bounds in Ricci flow
|
Introduction to the note modified, reference and motivation added
following suggestions by Professors Peter Topping and Mingliang Cai. A lower
bound for the diameters is added. As a result, we now know that, in finite
time, the Ricci flow can neither turn the diameter to infinity nor zero,
unless the scalar curvature blows up
| null | null | null |
math.DG math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A question about Ricci flow is when the diameters of the manifold under the
evolving metrics stay finite and bounded away from 0.
Topping \cite{T:1} addresses the question with an upper bound that depends on
the $L^{(n-1)/2}$ bound of the scalar curvature, volume and a local version of
Perelman's $\nu$ invariant. Here $n$ is the dimension. His result is sharp when
Perelman's F entropy is positive. In this note, we give a direct proof that for
all compact manifolds, the diameter bound depends just on the $L^{(n-1)/2}$
bound of the scalar curvature, volume and the Sobolev constants (or positive
Yamabe constant). This bound seems directly computable in large time for some
Ricci flows. In addition, since the result in its most general form is
independent of Ricci flow, further applications may be possible.
A generally sharp lower bound for the diameters is also given, which depends
only on the initial metric, time and $L^\infty$ bound of the scalar curvature.
These results imply that, in finite time, the Ricci flow can neither turn the
diameter to infinity nor zero, unless the scalar curvature blows up.
|
[{'version': 'v1', 'created': 'Wed, 10 Jul 2013 09:41:05 GMT'}
{'version': 'v2', 'created': 'Fri, 16 Aug 2013 08:24:48 GMT'}
{'version': 'v3', 'created': 'Tue, 10 Sep 2013 08:32:01 GMT'}]
|
2013-09-11
|
[array(['Zhang', 'Qi S', ''], dtype=object)]
|
4,750 |
2103.05790
|
Wan Zhen Chua
|
Wan Zhen Chua and Niayesh Afshordi
|
Electromagnetic Albedo of Quantum Black Holes
|
18 pages, 5 figures, JHEP accepted version
|
JHEP 07 (2021) 006
|
10.1007/JHEP07(2021)006
| null |
hep-th astro-ph.HE gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compute the albedo (or reflectivity) of electromagnetic waves off the
electron-positron Hawking plasma that surrounds the horizon of a Quantum Black
Hole. We adopt the "modified firewall conjecture" for fuzzballs
[arXiv:hep-th/0502050,arXiv:1711.01617], where we consider significant
electromagnetic interaction around the horizon. While prior work has treated
this problem as an electron-photon scattering process, we find that the
incoming quanta interact collectively with the fermionic excitations of the
Hawking plasma at low energies. We derive this via two different methods: one
using relativistic plasma dispersion relation, and another using the one-loop
correction to photon propagator. Both methods find that the reflectivity of
long wavelength photons off the Hawking plasma is significant, contrary to
previous claims. This leads to the enhancement of the electromagnetic albedo
for frequencies comparable to the Hawking temperature of black hole horizons in
vacuum. We comment on possible observable consequences of this effect.
|
[{'version': 'v1', 'created': 'Tue, 9 Mar 2021 23:54:50 GMT'}
{'version': 'v2', 'created': 'Fri, 2 Jul 2021 14:35:07 GMT'}]
|
2021-07-05
|
[array(['Chua', 'Wan Zhen', ''], dtype=object)
array(['Afshordi', 'Niayesh', ''], dtype=object)]
|
4,751 |
2103.04008
|
Alexander Wong
|
Alexander Wong, Jack Lu, Adam Dorfman, Paul McInnis, Mahmoud Famouri,
Daniel Manary, James Ren Hou Lee, and Michael Lynch
|
Fibrosis-Net: A Tailored Deep Convolutional Neural Network Design for
Prediction of Pulmonary Fibrosis Progression from Chest CT Images
|
12 pages
| null | null | null |
eess.IV cs.CV cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Pulmonary fibrosis is a devastating chronic lung disease that causes
irreparable lung tissue scarring and damage, resulting in progressive loss in
lung capacity and has no known cure. A critical step in the treatment and
management of pulmonary fibrosis is the assessment of lung function decline,
with computed tomography (CT) imaging being a particularly effective method for
determining the extent of lung damage caused by pulmonary fibrosis. Motivated
by this, we introduce Fibrosis-Net, a deep convolutional neural network design
tailored for the prediction of pulmonary fibrosis progression from chest CT
images. More specifically, machine-driven design exploration was leveraged to
determine a strong architectural design for CT lung analysis, upon which we
build a customized network design tailored for predicting forced vital capacity
(FVC) based on a patient's CT scan, initial spirometry measurement, and
clinical metadata. Finally, we leverage an explainability-driven performance
validation strategy to study the decision-making behaviour of Fibrosis-Net as
to verify that predictions are based on relevant visual indicators in CT
images. Experiments using a patient cohort from the OSIC Pulmonary Fibrosis
Progression Challenge showed that the proposed Fibrosis-Net is able to achieve
a significantly higher modified Laplace Log Likelihood score than the winning
solutions on the challenge. Furthermore, explainability-driven performance
validation demonstrated that the proposed Fibrosis-Net exhibits correct
decision-making behaviour by leveraging clinically-relevant visual indicators
in CT images when making predictions on pulmonary fibrosis progress. While
Fibrosis-Net is not yet a production-ready clinical assessment solution, we
hope that its release in open source manner will encourage researchers,
clinicians, and citizen data scientists alike to leverage and build upon it.
|
[{'version': 'v1', 'created': 'Sat, 6 Mar 2021 02:16:41 GMT'}
{'version': 'v2', 'created': 'Tue, 20 Apr 2021 14:43:20 GMT'}]
|
2021-04-21
|
[array(['Wong', 'Alexander', ''], dtype=object)
array(['Lu', 'Jack', ''], dtype=object)
array(['Dorfman', 'Adam', ''], dtype=object)
array(['McInnis', 'Paul', ''], dtype=object)
array(['Famouri', 'Mahmoud', ''], dtype=object)
array(['Manary', 'Daniel', ''], dtype=object)
array(['Lee', 'James Ren Hou', ''], dtype=object)
array(['Lynch', 'Michael', ''], dtype=object)]
|
4,752 |
1609.07509
|
Henry Towsner
|
William Simmons and Henry Towsner
|
Proof mining and effective bounds in differential polynomial rings
| null | null | null | null |
math.LO math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using the functional interpretation from proof theory, we analyze
nonconstructive proofs of several central theorems about polynomial and
differential polynomial rings. We extract effective bounds, some of which are
new to the literature, from the resulting proofs. In the process we discuss the
constructive content of Noetherian rings and the Nullstellensatz in both the
classical and differential settings. Sufficient background is given to
understand the proof-theoretic and differential-algebraic framework of the main
results.
|
[{'version': 'v1', 'created': 'Fri, 23 Sep 2016 20:49:59 GMT'}
{'version': 'v2', 'created': 'Tue, 16 Oct 2018 17:39:08 GMT'}]
|
2018-10-17
|
[array(['Simmons', 'William', ''], dtype=object)
array(['Towsner', 'Henry', ''], dtype=object)]
|
4,753 |
1604.02793
|
Arun Patel Dr
|
Arun Singh Patel, Subhavna Juneja, Pawan K. Kanaujia, G.Vijaya
Prakash, Anirban Chakraborti and Jaydeep Bhattacharya
|
Gold nanoflowers as efficient hot-spots for surface enhanced Raman
scattering
|
8 pages, 4 figures
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Gold nanoflowers are known for their use as efficient host for surface
enhanced Raman scattering of organic dye molecules. In this article, gold
nanoflowers have been synthesised and rhodamine 6 G (R6G) molecules have been
used as probe molecules. It is found that the gold nanoflowers can detect the
presence of R6G molecules upto 10^{-10} M. The petals of these nanoflowers play
an important role for the enhancement of Raman signals, and the intensity of
Raman signals is enhanced many folds in presence of gold nanoflowers - the
enhancement factor is of the order of 10^6. This is explained in terms of
electromagnetic mechanism.
|
[{'version': 'v1', 'created': 'Mon, 11 Apr 2016 05:00:03 GMT'}]
|
2016-04-12
|
[array(['Patel', 'Arun Singh', ''], dtype=object)
array(['Juneja', 'Subhavna', ''], dtype=object)
array(['Kanaujia', 'Pawan K.', ''], dtype=object)
array(['Prakash', 'G. Vijaya', ''], dtype=object)
array(['Chakraborti', 'Anirban', ''], dtype=object)
array(['Bhattacharya', 'Jaydeep', ''], dtype=object)]
|
4,754 |
1409.2685
|
Cy Qiu
|
Kun Tang, Chunyin Qiu, Jiuyang Lu, Manzhu Ke, and Zhengyou Liu
|
Focusing and directional beaming effects of airborne sound through a
planar lens with zigzag slits
|
10 pages
| null |
10.1063/1.4905910
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Based on the Huygens-Fresnel principle we design a planar lens to efficiently
realize the interconversion of the point-like source and Gaussian beam in the
air ambience. The lens is constructed by a planar plate drilled elaborately
with a nonuniform array of zigzag slits, where the slit exits act as
subwavelength-sized secondary sources carrying desired sound responses. The
experiments operated at audible regime agree well with the theoretical
predictions. This compact device could be useful in daily life applications,
such as for medical and detection purposes.
|
[{'version': 'v1', 'created': 'Mon, 8 Sep 2014 07:38:09 GMT'}]
|
2015-06-22
|
[array(['Tang', 'Kun', ''], dtype=object)
array(['Qiu', 'Chunyin', ''], dtype=object)
array(['Lu', 'Jiuyang', ''], dtype=object)
array(['Ke', 'Manzhu', ''], dtype=object)
array(['Liu', 'Zhengyou', ''], dtype=object)]
|
4,755 |
cond-mat/9209005
|
Hartmut Monien
|
H. Monien (Institute for Theoretical Physics, Universty of California,
Santa Barbara, CA 93106)
|
Aspects of Spin Dynamics in the Cuprate Superconductors
|
figure available upon request, 11 pages
| null | null | null |
cond-mat
| null |
One of the interesting aspects of the CuO superconductors is that
superconductivity is happening so close to the antiferromagnetic state. The
nuclear magnetic resonance and the recent neutron scattering experiments
clearly indicate that magnetic correlations persist in to the heavily doped
regime. In this paper we will discuss some of the details of the coupling of
the nuclear magnetic spin to the conduction electron spins. Furthermore we will
show that a simple band structure can explain the recent neutron scattering
data in the \LaSrCuO material for the optimal concentration of $x\approx 0.15$
if the lifetime effects are included.
|
[{'version': 'v1', 'created': 'Sat, 5 Sep 1992 20:37:53 GMT'}]
|
2007-05-23
|
[array(['Monien', 'H.', '',
'Institute for Theoretical Physics, Universty of California,\n Santa Barbara, CA 93106'],
dtype=object) ]
|
4,756 |
2201.11972
|
Songxiang Liu
|
Songxiang Liu, Dan Su, Dong Yu
|
DiffGAN-TTS: High-Fidelity and Efficient Text-to-Speech with Denoising
Diffusion GANs
|
Preprint. 16 pages
| null | null | null |
eess.AS cs.CL cs.SD
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Denoising diffusion probabilistic models (DDPMs) are expressive generative
models that have been used to solve a variety of speech synthesis problems.
However, because of their high sampling costs, DDPMs are difficult to use in
real-time speech processing applications. In this paper, we introduce
DiffGAN-TTS, a novel DDPM-based text-to-speech (TTS) model achieving
high-fidelity and efficient speech synthesis. DiffGAN-TTS is based on denoising
diffusion generative adversarial networks (GANs), which adopt an
adversarially-trained expressive model to approximate the denoising
distribution. We show with multi-speaker TTS experiments that DiffGAN-TTS can
generate high-fidelity speech samples within only 4 denoising steps. We present
an active shallow diffusion mechanism to further speed up inference. A
two-stage training scheme is proposed, with a basic TTS acoustic model trained
at stage one providing valuable prior information for a DDPM trained at stage
two. Our experiments show that DiffGAN-TTS can achieve high synthesis
performance with only 1 denoising step.
|
[{'version': 'v1', 'created': 'Fri, 28 Jan 2022 07:41:10 GMT'}]
|
2022-01-31
|
[array(['Liu', 'Songxiang', ''], dtype=object)
array(['Su', 'Dan', ''], dtype=object)
array(['Yu', 'Dong', ''], dtype=object)]
|
4,757 |
1307.0765
|
Sandor Nagy
|
S. Nagy, B. Fazekas, L. Juhasz, K. Sailer
|
Critical exponents in quantum Einstein gravity
|
6 pages, 5 figures
| null |
10.1103/PhysRevD.88.116010
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The quantum Einstein gravity is treated by the functional renormalization
group method using the Einstein-Hilbert action. The ultraviolet non-Gaussian
fixed point is determined and its corresponding exponent of the correlation
length is calculated for a wide range of regulators. It is shown that the
exponent provides a minimal sensitivity to the parameters of the regulator
which correspond to the Litim's regulator.
|
[{'version': 'v1', 'created': 'Tue, 2 Jul 2013 17:12:28 GMT'}]
|
2015-06-16
|
[array(['Nagy', 'S.', ''], dtype=object)
array(['Fazekas', 'B.', ''], dtype=object)
array(['Juhasz', 'L.', ''], dtype=object)
array(['Sailer', 'K.', ''], dtype=object)]
|
4,758 |
1310.8583
|
Swakkhar Shatabda
|
Swakkhar Shatabda, M.A. Hakim Newton, Duc Nghia Pham and Abdul Sattar
|
A Hybrid Local Search for Simplified Protein Structure Prediction
| null |
Proceedings of the International Conference on Bioinformatics
Models, Methods and Algorithms, Barcelona, Spain, 11 - 14 February, 2013.
SciTePress 2013 ISBN 978-989-8565-35-8 pages:158-163
| null | null |
cs.CE cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Protein structure prediction based on Hydrophobic-Polar energy model
essentially becomes searching for a conformation having a compact hydrophobic
core at the center. The hydrophobic core minimizes the interaction energy
between the amino acids of the given protein. Local search algorithms can
quickly find very good conformations by moving repeatedly from the current
solution to its "best" neighbor. However, once such a compact hydrophobic core
is found, the search stagnates and spends enormous effort in quest of an
alternative core. In this paper, we attempt to restructure segments of a
conformation with such compact core. We select one large segment or a number of
small segments and apply exhaustive local search. We also apply a mix of
heuristics so that one heuristic can help escape local minima of another. We
evaluated our algorithm by using Face Centered Cubic (FCC) Lattice on a set of
standard benchmark proteins and obtain significantly better results than that
of the state-of-the-art methods.
|
[{'version': 'v1', 'created': 'Thu, 31 Oct 2013 16:41:44 GMT'}]
|
2013-11-01
|
[array(['Shatabda', 'Swakkhar', ''], dtype=object)
array(['Newton', 'M. A. Hakim', ''], dtype=object)
array(['Pham', 'Duc Nghia', ''], dtype=object)
array(['Sattar', 'Abdul', ''], dtype=object)]
|
4,759 |
1707.07871
|
Bernhard Beckermann
|
Bernhard Beckermann (1), Thomas Helart (1) ((1) LPP)
|
On the sharpness of the weighted Bernstein-Walsh inequality, with
applications to the superlinear convergence of conjugate gradients
| null | null | null | null |
math.NA math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we show that the weighted Bernstein-Walsh inequality in
logarithmic potential theory is sharp up to some new universal constant,
provided that the external field is given by a logarithmic potential. Our main
tool for such results is a new technique of discretization of logarithmic
potentials, where we take the same starting point as in earlier work of Totik
and of Levin \& Lubinsky, but add an important new ingredient, namely some new
mean value property for the cumulative distribution function of the underlying
measure. As an application, we revisit the work of Beckermann \& Kuijlaars on
the superlinear convergence of conjugate gradients. These authors have
determined the asymptotic convergence factor for sequences of systems of linear
equations with an asymptotic eigenvalue distribution. There was some numerical
evidence to let conjecture that the integral mean of Green functions occurring
in their work should also allow to give inequalities for the rate of
convergence if one makes a suitable link between measures and the eigenvalues
of a single matrix of coefficients. We prove this conjecture , at least for a
class of measures which is of particular interest for applications.
|
[{'version': 'v1', 'created': 'Tue, 25 Jul 2017 09:35:52 GMT'}]
|
2017-07-26
|
[array(['Beckermann', 'Bernhard', '', 'LPP'], dtype=object)
array(['Helart', 'Thomas', '', 'LPP'], dtype=object)]
|
4,760 |
1608.04635
|
Em\'ilia Carolina Santana Teixeira Alves
|
Em\'ilia Alves
|
Topology of the space of locally convex curves on the 3-sphere
|
phd thesis, rio de Janeiro, 2016
| null | null | null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A (positive) locally convex curve in the 2-sphere is a curve with positive
geodesic curvature (i.e., which always turns left). In the 3-sphere, it is a
curve with positive torsion. In this work we discussed the topology of spaces
of such curves with prescribed initial and final jets. The case of the 2-sphere
is understood (Saldanha-2013); the case of n=3 is not yet thoroughly clarified.
In order to obtain partial information about the homotopy type of such spaces
in the case n=3, we represented a positive locally convex curve as a pair of
curves on the 2-sphere with some restrictions.
|
[{'version': 'v1', 'created': 'Tue, 16 Aug 2016 15:27:55 GMT'}]
|
2017-03-08
|
[array(['Alves', 'Emília', ''], dtype=object)]
|
4,761 |
nlin/0302004
|
Johan van de Leur
|
Henrik Aratyn and Johan van de Leur
|
The CKP hierarchy and the WDVV prepotential
|
10 pages, contribution to the NATO-ARW conference on Bilinear
Integrable Systems : from Classical to Quantum, Continuous to Discrete 15 Sep
2002 - 19 Sep 2002 : Elba, Italy
| null | null | null |
nlin.SI hep-th math-ph math.MP
| null |
Using a multicomponent version of the CKP hierarchy we construct the
prepotential of the WDVV equations.
|
[{'version': 'v1', 'created': 'Mon, 3 Feb 2003 09:12:42 GMT'}]
|
2007-05-23
|
[array(['Aratyn', 'Henrik', ''], dtype=object)
array(['van de Leur', 'Johan', ''], dtype=object)]
|
4,762 |
1907.05747
|
Rafael Pav\~ao
|
Juan Nieves and Rafael Pavao
|
On the nature of the lowest-lying odd parity charmed baryon
$\Lambda_c(2595)$ and $\Lambda_c(2625)$ resonances
|
16 pages, 7 figures
|
Phys. Rev. D 101, 014018 (2020)
|
10.1103/PhysRevD.101.014018
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the structure of the $\Lambda_c(2595)$ and $\Lambda_c(2625)$
resonances in the framework of an effective field theory consistent with heavy
quark spin and chiral symmetries, that incorporates the interplay between
$\Sigma_c^{(*)}\pi-ND^{(*)}$ baryon-meson degrees of freedom and bare P-wave
$c\bar ud$ quark-model states. We show that these two resonances are not HQSS
partners. The $J^P= 3/2^-$ $\Lambda_c(2625)$ should be viewed mostly as a
dressed three quark state, whose origin is determined by a bare state,
predicted to lie very close to the mass of the resonance. The $J^P= 1/2^-$
$\Lambda_c(2595)$ seems to have, however, a predominant molecular structure.
This is because, it is either the result of the chiral $\Sigma_c\pi$
interaction, which threshold is located much more closer than the mass of the
bare three-quark state, or because the light degrees of freedom in its inner
structure are coupled to the unnatural $0^-$ quantum-numbers. We show that both
situations can occur depending on the renormalization procedure used. We find
some additional states, but the classification of the spectrum in terms of HQSS
is difficult, despite having used interactions that respect this symmetry. This
is because the bare quark-model state and the $\Sigma_c\pi$ threshold are
located extraordinarily close to the $\Lambda_c(2625)$ and $\Lambda_c(2595)$,
respectively, and hence they play totally different roles in each sector.
|
[{'version': 'v1', 'created': 'Fri, 12 Jul 2019 13:55:13 GMT'}]
|
2020-01-29
|
[array(['Nieves', 'Juan', ''], dtype=object)
array(['Pavao', 'Rafael', ''], dtype=object)]
|
4,763 |
2207.01660
|
Yotam Shapira
|
Yotam Shapira, Sapir Cohen, Nitzan Akerman, Ady Stern and Roee Ozeri
|
Robust two-qubit trapped ions gates using spin-dependent squeezing
| null | null |
10.1103/PhysRevLett.130.030602
| null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Entangling gates are an essential component of quantum computers. However,
generating high-fidelity gates, in a scalable manner, remains a major challenge
in all quantum information processing platforms. Accordingly, improving the
fidelity and robustness of these gates has been a research focus in recent
years. In trapped ions quantum computers, entangling gates are performed by
driving the normal modes of motion of the ion chain, generating a
spin-dependent force. Even though there has been significant progress in
increasing the robustness and modularity of these gates, they are still
sensitive to noise in the intensity of the driving field. Here we supplement
the conventional spin-dependent displacement with spin-dependent squeezing,
which enables a gate that is robust to deviations in the amplitude of the
driving field. We solve the general Hamiltonian and engineer its spectrum
analytically. We also endow our gate with other, more conventional, robustness
properties, making it resilient to many practical sources of noise and
inaccuracies.
|
[{'version': 'v1', 'created': 'Mon, 4 Jul 2022 18:17:26 GMT'}]
|
2023-02-01
|
[array(['Shapira', 'Yotam', ''], dtype=object)
array(['Cohen', 'Sapir', ''], dtype=object)
array(['Akerman', 'Nitzan', ''], dtype=object)
array(['Stern', 'Ady', ''], dtype=object)
array(['Ozeri', 'Roee', ''], dtype=object)]
|
4,764 |
2112.14849
|
Christopher Boudreaux
|
Christopher Boudreaux, Randall Holcombe
|
Institutional Quality and the Wealth of Autocrats
|
20 pages
|
European Journal of Government and Economics, 6(2) 106-125, 2017
| null | null |
econ.GN q-fin.EC
|
http://creativecommons.org/licenses/by/4.0/
|
One frequently given explanation for why autocrats maintain corrupt and
inefficient institutions is that the autocrats benefit personally even though
the citizens of their countries are worse off. The empirical evidence does not
support this hypothesis. Autocrats in countries with low-quality institutions
do tend to be wealthy, but typically, they were wealthy before they assumed
power. A plausible explanation, consistent with the data, is that wealthy
individuals in countries with inefficient and corrupt institutions face the
threat of having their wealth appropriated by government, so have the incentive
to use some of their wealth to seek political power to protect the rest of
their wealth from confiscation. While autocrats may use government institutions
to increase their wealth, autocrats in countries with low-quality institutions
tend to be wealthy when they assume power, because wealthy individuals have the
incentive to use their wealth to acquire political power to protect themselves
from a potentially predatory government.
|
[{'version': 'v1', 'created': 'Wed, 29 Dec 2021 22:17:55 GMT'}]
|
2022-01-03
|
[array(['Boudreaux', 'Christopher', ''], dtype=object)
array(['Holcombe', 'Randall', ''], dtype=object)]
|
4,765 |
1706.03525
|
Salvatore Tringali Dr
|
Salvatore Tringali
|
Structural properties of subadditive families with applications to
factorization theory
|
22 pp., no figures. Fixed a few typos and updated statements and
definitions after realizing that what is proved in the paper is slighly
stronger than what claimed in the previous version. To appear in Israel
Journal of Mathematics
|
Israel J. Math., Vol. 234, No. 1 (2019), 1-35
|
10.1007/s11856-019-1922-2
| null |
math.NT math.AC math.CO math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $H$ be a multiplicatively written monoid. Given $k\in{\bf N}^+$, we
denote by $\mathscr U_k$ the set of all $\ell\in{\bf N}^+$ such that $a_1\cdots
a_k=b_1\cdots b_\ell$ for some atoms $a_1,\ldots,a_k,b_1,\ldots,b_\ell\in H$.
The sets $\mathscr U_k$ are one of the most fundamental invariants studied in
the theory of non-unique factorization, and understanding their structure is a
basic problem in the field: In particular, it is known that, in many cases of
interest, these sets are almost arithmetic progressions with the same
difference and bound for all large $k$, namely, $H$ satisfies the Structure
Theorem for Unions. The present paper improves the current state of the art on
this problem.
More precisely, we show that, under mild assumptions on $H$, not only does
the Structure Theorem for Unions hold, but there also exists $\mu\in{\bf N}^+$
such that, for every $M\in{\bf N}$, the sequences $$ \bigl((\mathscr
U_k-\inf\mathscr U_k)\cap[\![0,M]\!]\bigr)_{k\ge 1} \quad\text{and}\quad
\bigl((\sup\mathscr U_k-\mathscr U_k)\cap[\![0,M]\!]\bigr)_{k\ge 1} $$ are
$\mu$-periodic from some point on. The result applies, e.g., to (the
multiplicative monoid of) all commutative Krull domains (e.g., Dedekind
domains) with finite class group; a variety of weakly Krull commutative domains
(including all orders in number fields with finite elasticity); some maximal
orders in central simple algebras over global fields; and all numerical
monoids.
Large parts of the proofs are worked out in a "purely additive model", by
inquiring into the properties of what we call a subadditive family, i.e., a
collection $\mathscr L$ of subsets of $\bf N$ such that, for all
$L_1,L_2\in\mathscr L$, there is $L\in\mathscr L$ with $L_1+L_2\subseteq L$.
|
[{'version': 'v1', 'created': 'Mon, 12 Jun 2017 09:12:35 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Aug 2017 21:28:20 GMT'}
{'version': 'v3', 'created': 'Thu, 12 Apr 2018 15:06:30 GMT'}
{'version': 'v4', 'created': 'Mon, 12 Nov 2018 01:00:00 GMT'}]
|
2019-12-13
|
[array(['Tringali', 'Salvatore', ''], dtype=object)]
|
4,766 |
hep-ph/9310336
| null |
R.F.Alvarez-Estrada, A.Dobado and A.Gomez Nicola
|
On the Wess-Zumino-Witten anomalous functional at finite temperature
|
16 pages, FT/UCM/9/93
|
Phys.Lett. B319 (1993) 238-243
|
10.1016/0370-2693(93)90808-U
| null |
hep-ph
| null |
We discuss the finite temperature extension of the anomalous Wess-Zumino
-Witten lagrangian. The finite temperature S^1\times S^3 compactification makes
a structure in disconnected sectors, corresponding to different baryon numbers
appear naturally. The consistency of the anomalous functional is proved for
arbitrary baryon number configurations. The anomalous behavior of the
functional is shown to be consistent with the absence of finite temperature
corrections to chiral anomalies in
QCD, for each baryon number sector.
|
[{'version': 'v1', 'created': 'Fri, 22 Oct 1993 11:24:05 GMT'}]
|
2009-10-22
|
[array(['Alvarez-Estrada', 'R. F.', ''], dtype=object)
array(['Dobado', 'A.', ''], dtype=object)
array(['Nicola', 'A. Gomez', ''], dtype=object)]
|
4,767 |
2111.04212
|
Guangshun Wei
|
Guangshun Wei, Zhiming Cui, Jie Zhu, Lei Yang, Yuanfeng Zhou, Pradeep
Singh, Min Gu, Wenping Wang
|
Dense Representative Tooth Landmark/axis Detection Network on 3D Model
|
11pages,27figures
| null | null | null |
eess.IV cs.AI cs.CV cs.GR
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Artificial intelligence (AI) technology is increasingly used for digital
orthodontics, but one of the challenges is to automatically and accurately
detect tooth landmarks and axes. This is partly because of sophisticated
geometric definitions of them, and partly due to large variations among
individual tooth and across different types of tooth. As such, we propose a
deep learning approach with a labeled dataset by professional dentists to the
tooth landmark/axis detection on tooth model that are crucial for orthodontic
treatments. Our method can extract not only tooth landmarks in the form of
point (e.g. cusps), but also axes that measure the tooth angulation and
inclination. The proposed network takes as input a 3D tooth model and predicts
various types of the tooth landmarks and axes. Specifically, we encode the
landmarks and axes as dense fields defined on the surface of the tooth model.
This design choice and a set of added components make the proposed network more
suitable for extracting sparse landmarks from a given 3D tooth model. Extensive
evaluation of the proposed method was conducted on a set of dental models
prepared by experienced dentists. Results show that our method can produce
tooth landmarks with high accuracy. Our method was examined and justified via
comparison with the state-of-the-art methods as well as the ablation studies.
|
[{'version': 'v1', 'created': 'Mon, 8 Nov 2021 00:42:22 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Nov 2021 03:48:51 GMT'}]
|
2021-11-10
|
[array(['Wei', 'Guangshun', ''], dtype=object)
array(['Cui', 'Zhiming', ''], dtype=object)
array(['Zhu', 'Jie', ''], dtype=object)
array(['Yang', 'Lei', ''], dtype=object)
array(['Zhou', 'Yuanfeng', ''], dtype=object)
array(['Singh', 'Pradeep', ''], dtype=object)
array(['Gu', 'Min', ''], dtype=object)
array(['Wang', 'Wenping', ''], dtype=object)]
|
4,768 |
1307.6065
|
Krzysztof Pachucki
|
Krzysztof Pachucki
|
Efficient approach to two-centre exponential integrals with applications
to excited states of molecular hydrogen
|
17 pages
| null |
10.1103/PhysRevA.88.022507
| null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A general approach to evaluation of two-centre two-electron exponential
integrals with arbitrary parameters is presented. The results for the
Born-Oppenheimer potential for various excited states of molecular hydrogen
with Ko{\l} os-Wolniewicz functions are obtained with precision exceeding
previous values by about 3 orders of magnitude.
|
[{'version': 'v1', 'created': 'Tue, 23 Jul 2013 13:27:45 GMT'}]
|
2015-06-16
|
[array(['Pachucki', 'Krzysztof', ''], dtype=object)]
|
4,769 |
1210.7209
|
Man Ho Wu
|
E. M. H. Wu (1), J. Takata (1), K. S. Cheng (1), R. H. H. Huang (2),
C. Y. Hui (3), A. K. H. Kong (2), P. H. T. Tam (2), J. H. K. Wu (2) ((1)
University of Hong Kong, (2) National Tsing Hua University, (3) Chungnam
National University)
|
Orbital Phase Dependent Gamma-ray emissions from the Black Widow Pulsar
|
18 pages, 6 figures, 1 table, accepted for publication in The
Astrophysical Journal
| null |
10.1088/0004-637X/761/2/181
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on evidence for orbital phase-dependence of the gamma-ray emission
from PSR B1957+20 black widow system by using the data of the Fermi Large Area
Telescope. We divide an orbital cycle into two regions: a region containing the
inferior conjunction, and the other region containing rest of the orbital
cycle. We show that the observed spectra for the different orbital regions are
fitted by different functional forms. The spectrum of the orbital region
containing inferior conjunction can be described by a power-law with an
exponential cutoff (PLE) model, which gives the best-fit model for the orbital
phase that does not contain the inferior conjunction, plus an extra component
above ~2.7 GeV. The emission above 3 GeV in this region is detected with a
~7-sigma confidence level. The gamma-ray data above ~2.7 GeV are observed to be
modulated at the orbital period at the ~2.3-sigma level. We anticipate that the
PLE component dominating below ~2.7 GeV originates from the pulsar
magnetosphere. We also show that the inverse-Compton scattering of the thermal
radiation of the companion star off a "cold" ultra-relativistic pulsar wind can
explain the extra component above ~2.7 GeV. The black widow pulsar PSR B1957+20
may be the member of a new class of object, in the sense that the system is
showing gamma-ray emission with both magnetospheric and pulsar wind origins.
|
[{'version': 'v1', 'created': 'Fri, 26 Oct 2012 18:30:25 GMT'}]
|
2015-06-11
|
[array(['Wu', 'E. M. H.', ''], dtype=object)
array(['Takata', 'J.', ''], dtype=object)
array(['Cheng', 'K. S.', ''], dtype=object)
array(['Huang', 'R. H. H.', ''], dtype=object)
array(['Hui', 'C. Y.', ''], dtype=object)
array(['Kong', 'A. K. H.', ''], dtype=object)
array(['Tam', 'P. H. T.', ''], dtype=object)
array(['Wu', 'J. H. K.', ''], dtype=object)]
|
4,770 |
2007.02523
|
Amrith Setlur
|
Amrith Setlur, Saket Dingliwal, Barnabas Poczos
|
Covariate Distribution Aware Meta-learning
| null |
ICML 2020 Lifelong Learning Workshop
| null | null |
cs.LG stat.ML
|
http://creativecommons.org/licenses/by/4.0/
|
Meta-learning has proven to be successful for few-shot learning across the
regression, classification, and reinforcement learning paradigms. Recent
approaches have adopted Bayesian interpretations to improve gradient-based
meta-learners by quantifying the uncertainty of the post-adaptation estimates.
Most of these works almost completely ignore the latent relationship between
the covariate distribution $(p(x))$ of a task and the corresponding conditional
distribution $p(y|x)$. In this paper, we identify the need to explicitly model
the meta-distribution over the task covariates in a hierarchical Bayesian
framework. We begin by introducing a graphical model that leverages the samples
from the marginal $p(x)$ to better infer the posterior over the optimal
parameters of the conditional distribution $(p(y|x))$ for each task. Based on
this model we propose a computationally feasible meta-learning algorithm by
introducing meaningful relaxations in our final objective. We demonstrate the
gains of our algorithm over initialization based meta-learning baselines on
popular classification benchmarks. Finally, to understand the potential benefit
of modeling task covariates we further evaluate our method on a synthetic
regression dataset.
|
[{'version': 'v1', 'created': 'Mon, 6 Jul 2020 05:00:13 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Jul 2020 19:22:10 GMT'}
{'version': 'v3', 'created': 'Sat, 28 Nov 2020 02:07:27 GMT'}]
|
2020-12-01
|
[array(['Setlur', 'Amrith', ''], dtype=object)
array(['Dingliwal', 'Saket', ''], dtype=object)
array(['Poczos', 'Barnabas', ''], dtype=object)]
|
4,771 |
math/0505615
|
Morris Kalka
|
Morris Kalka and Giorgio Patrizio
|
Finite Type Monge-Amp\`ere Foliations
| null | null | null | null |
math.CV math.DG
| null |
In this paper we extend our previous work on singularities of Monge-Amp\`ere
foliations to the case of pseudoconvex finite type domains. We are able to
answer the questin of Burns on homogeneous polynomials whose logarithm
satisfies the complex Monge-Amp\`ere equation completely in dimension 2 . We
are also able to generalize the work of P.M. Wong in dimension 2 on the
classification of complete weighted circular domains to include finite type
domains.
|
[{'version': 'v1', 'created': 'Fri, 27 May 2005 15:42:07 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Jun 2005 14:50:44 GMT'}
{'version': 'v3', 'created': 'Wed, 26 Jul 2006 20:28:11 GMT'}
{'version': 'v4', 'created': 'Wed, 7 May 2008 20:06:32 GMT'}]
|
2008-05-07
|
[array(['Kalka', 'Morris', ''], dtype=object)
array(['Patrizio', 'Giorgio', ''], dtype=object)]
|
4,772 |
1805.00679
|
Hoang Nam Phan
|
Hoang Nam Phan, Fabrizio Paolacci
|
Fluid-structure interaction problems: An application to anchored and
unanchored steel storage tanks subjected to seismic loadings
| null | null | null | null |
math.NA math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The estimation of the degree of risk of steel storage tanks from an
industrial or nuclear power plant during an earthquake event is a very
difficult task since the dynamic behaviour of the tank-liquid system is highly
complex. The seismic response of steel storage tanks is quite different from
building structures not only due to hydrodynamic effects acting on the shell
and bottom plate but also because of many sources of nonlinear behaviour
mechanisms. For the earthquake-resistant design of tanks, it is important to
use a rational and reliable nonlinear dynamic analysis procedure, which is
capable of capturing the seismic behaviour of the tanks under artificial or
real earthquakes. The present paper deals with the nonlinear finite element
modelling of steel storage tanks subjected to seismic loadings. The interaction
effects of fluid and structure are modelled using a surface-based
acoustic-structural interaction in the ABAQUS software. The successive contact
and separation between the bottom plate and its rigid foundation caused by
sliding and uplift are taken into account by a contact modelling approach.
Reduced scales of both slender and broad cylindrical steel storage tanks from a
shaking table campaign within the framework of the INDUSE-2-SAFETY project are
selected for the study. The seismic responses of the tanks including the
hydrodynamic pressure distribution acting on the shell plate, the elevation of
the liquid free surface, and the uplift response of the bottom plate when the
tank is unanchored are presented and compared with the experimental results.
The responses obtained from the refined models are also compared with those
obtained using a simplified approach, which is based on the lumped mass model
of the liquid motion.
|
[{'version': 'v1', 'created': 'Wed, 2 May 2018 08:52:30 GMT'}]
|
2018-05-03
|
[array(['Phan', 'Hoang Nam', ''], dtype=object)
array(['Paolacci', 'Fabrizio', ''], dtype=object)]
|
4,773 |
1412.7208
|
Otakar Svitek
|
Petr Kaspar, Otakar Svitek
|
Averaging in LRS class II spacetimes
|
3 figures, accepted in GRG
|
Gen. Rel. Grav. 47 (2015) 4
|
10.1007/s10714-014-1844-6
| null |
gr-qc
|
http://creativecommons.org/licenses/by/3.0/
|
We generalize Buchert's averaged equations [Gen. Rel. Grav. 32, 105 (2000);
Gen. Rel. Grav. 33, 1381 (2001)] to LRS class II dust model in the sense that
all Einstein equations are averaged, not only the trace part. We derive the
relevant averaged equations and we investigate backreaction on expansion and
shear scalars in an approximate LTB model. Finally we propose a way to close
the system of averaged equations.
|
[{'version': 'v1', 'created': 'Mon, 22 Dec 2014 23:28:32 GMT'}]
|
2015-02-17
|
[array(['Kaspar', 'Petr', ''], dtype=object)
array(['Svitek', 'Otakar', ''], dtype=object)]
|
4,774 |
1801.05219
|
Dane Corneil
|
Wulfram Gerstner, Marco Lehmann, Vasiliki Liakoni, Dane Corneil, and
Johanni Brea
|
Eligibility Traces and Plasticity on Behavioral Time Scales:
Experimental Support of neoHebbian Three-Factor Learning Rules
| null | null |
10.3389/fncir.2018.00053
| null |
q-bio.NC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Most elementary behaviors such as moving the arm to grasp an object or
walking into the next room to explore a museum evolve on the time scale of
seconds; in contrast, neuronal action potentials occur on the time scale of a
few milliseconds. Learning rules of the brain must therefore bridge the gap
between these two different time scales.
Modern theories of synaptic plasticity have postulated that the co-activation
of pre- and postsynaptic neurons sets a flag at the synapse, called an
eligibility trace, that leads to a weight change only if an additional factor
is present while the flag is set. This third factor, signaling reward,
punishment, surprise, or novelty, could be implemented by the phasic activity
of neuromodulators or specific neuronal inputs signaling special events. While
the theoretical framework has been developed over the last decades,
experimental evidence in support of eligibility traces on the time scale of
seconds has been collected only during the last few years.
Here we review, in the context of three-factor rules of synaptic plasticity,
four key experiments that support the role of synaptic eligibility traces in
combination with a third factor as a biological implementation of neoHebbian
three-factor learning rules.
|
[{'version': 'v1', 'created': 'Tue, 16 Jan 2018 12:08:03 GMT'}]
|
2018-08-17
|
[array(['Gerstner', 'Wulfram', ''], dtype=object)
array(['Lehmann', 'Marco', ''], dtype=object)
array(['Liakoni', 'Vasiliki', ''], dtype=object)
array(['Corneil', 'Dane', ''], dtype=object)
array(['Brea', 'Johanni', ''], dtype=object)]
|
4,775 |
1809.07774
|
Jae-hyeon Park
|
Jae-hyeon Park
|
Higgs mass and vacuum stability with high-scale supersymmetry
|
11 pages
| null | null |
KIAS-Q18019
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the high-scale (split) MSSM, the measured Higgs mass sets an upper bound
on the supersymmetric scalar mass scale MSUSY around $10^{11}$ ($10^{8}$) GeV,
for $\tan\beta$ in the standard range and the central value of the top quark
mass $m_t$. This article discusses how maximal MSUSY is affected by negative
threshold corrections to the quartic Higgs coupling arising from the sbottom
and stop trilinear couplings. In the high-scale MSSM with very high
$\tan\beta$, the electroweak vacuum decay due to the large bottom Yukawa
coupling rules out the possibility of raising MSUSY beyond the above limit. In
cases with large $A_b$ or $A_t$, MSUSY as a common mass of the extra fermions
and scalars can be as high as $10^{17}$ GeV remaining consistent with $m_h$ and
the vacuum longevity if $m_t$ is smaller than the central value by $2\sigma$.
For the central value of $m_t$, the upper limit on MSUSY does not change very
much owing to the metastability, which is the case also in the split MSSM even
with $\pm 2\sigma$ variations in $m_t$.
|
[{'version': 'v1', 'created': 'Thu, 20 Sep 2018 18:00:02 GMT'}]
|
2018-09-24
|
[array(['Park', 'Jae-hyeon', ''], dtype=object)]
|
4,776 |
1611.09254
|
Fabrizio Baroni
|
Fabrizio Baroni
|
Phase transitions triggered by dumbbell equipotential hypersurfaces
|
8 pages, 8 figures. arXiv admin note: substantial text overlap with
arXiv:1106.3870
|
J. Stat. Mech. (2020) 103202
|
10.1088/1742-5468/abb6e0
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a recent paper a toy model (called hypercubic model) undergoing a
first-order $\mathbb{Z}_2$ symmetry breaking phase transition (SBPT) has been
introduced. The hypercubic model was inspired by the \emph{topological
hypothesis}, according to which a phase transition may be entailed by suitable
topological changes of the equipotential hypersurfaces $\Sigma_v$ of
configuration space. The $\Sigma_v$'s of the hypercubic model have a single
topological change, which, under further particular hypotheses of geometric
nature, entails the $\mathbb{Z}_2$-SBPT. In this paper we introduce an extended
version of the hypercubic model in which no topological change in the
$\Sigma_v$'s is present anymore, but nevertheless the $\mathbb{Z}_2$-SBPT
occurs the same. We introduce a geometric property of the $\Sigma_v$'s (i.e.
dumbbell $\Sigma_v$'s suitably defined) that is sufficient to entail a
$\mathbb{Z}_2$-SBPT regardless their topology. The paper ends by applying the
picture of the dumbbell $\Sigma_v$'s to a physical model, i.e. the mean-field
$\phi^4$ model.
|
[{'version': 'v1', 'created': 'Mon, 28 Nov 2016 17:32:03 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Jan 2017 07:54:22 GMT'}]
|
2020-10-23
|
[array(['Baroni', 'Fabrizio', ''], dtype=object)]
|
4,777 |
cond-mat/9711300
|
Jose Manuel Gomez Vilar
|
J. M. G. Vilar and J. M. Rub\'i
|
Scaling Concepts in Periodically Modulated Noisy Systems
|
8 pages, RevTex
| null | null | null |
cond-mat.stat-mech
| null |
We show that scaling arguments are very useful to analyze the dynamics of
periodically modulated noisy systems. Information about the behavior of the
relevant quantities, such as the signal-to-noise ratio, upon variations of the
noise level, can be obtained by analyzing the symmetries and invariances of the
system. In this way, it is possible to predict diverse physical manifestations
of the cooperative behavior between noise and input signal, as for instance
stochastic resonance, spatiotemporal stochastic resonance, and stochastic
multiresonance.
|
[{'version': 'v1', 'created': 'Thu, 27 Nov 1997 16:13:49 GMT'}]
|
2016-08-15
|
[array(['Vilar', 'J. M. G.', ''], dtype=object)
array(['Rubí', 'J. M.', ''], dtype=object)]
|
4,778 |
1006.2070
|
Grigory Temnov Dr
|
Lev B. Klebanov and Grigory Temnov
|
Characterization of a subclass of Tweedie distributions by a property of
generalized stability
|
Research paper, 15 pages, 1 table
| null | null | null |
stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a class of distributions originating from an exponential family
and having a property related to the strict stability property. A
characteristic function representation for this family is obtained and its
properties are investigated. The proposed class relates to stable distributions
and includes Inverse Gaussian distribution and Levy distribution as special
cases. Due to its origin, the proposed distribution has a sufficient statistic.
Besides, it combines stability property at lower scales with an exponential
decay of the distribution's tail and has an additional flexibility due to the
convenient parametrization. Apart from the basic model, certain generalizations
are considered, including the one related to geometric stable distributions.
|
[{'version': 'v1', 'created': 'Thu, 10 Jun 2010 15:56:06 GMT'}]
|
2010-06-11
|
[array(['Klebanov', 'Lev B.', ''], dtype=object)
array(['Temnov', 'Grigory', ''], dtype=object)]
|
4,779 |
1610.03647
|
Der-Yeuan Yu
|
Der-Yeuan Yu, Elizabeth Stobert, David Basin, Srdjan Capkun
|
Exploring Website Location as a Security Indicator
|
13 pages, 4 figures, 7 tables. Published at the 2018 NDSS Workshop on
Usable Security (USEC)
| null | null | null |
cs.CR cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Authenticating websites is an ongoing problem for users. Recent proposals
have suggested strengthening current server authentication methods by
incorporating website location as a comprehensible additional trust factor. In
this work, we explore users' acceptance of location information and how it
affects decision-making for security and privacy. We conducted a series of
qualitative interviews to learn how location can be integrated into users'
decision-making for security, and we designed a security indicator to alert the
user to changes in website locations. We evaluated our tool in a 44-participant
user study and found that users were less likely to perform security-sensitive
tasks when alerted to location changes. Our results suggest that website
location can be used as an effective indicator for users' security assessments.
|
[{'version': 'v1', 'created': 'Wed, 12 Oct 2016 09:28:40 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Apr 2017 10:38:28 GMT'}
{'version': 'v3', 'created': 'Thu, 1 Mar 2018 16:35:15 GMT'}]
|
2018-03-02
|
[array(['Yu', 'Der-Yeuan', ''], dtype=object)
array(['Stobert', 'Elizabeth', ''], dtype=object)
array(['Basin', 'David', ''], dtype=object)
array(['Capkun', 'Srdjan', ''], dtype=object)]
|
4,780 |
1807.08142
|
Guy Barshap Gb
|
Guy Barshap
|
{\em Crypto-Battleships} or How to play Battleships game over the
Blockchain?
|
16 pg, a draft version
| null | null | null |
cs.CR cs.SE
|
http://creativecommons.org/licenses/by/4.0/
|
Battleships is a well known traditional board game for two players which
dates from World War I. Though, the game has several digital version
implementations, they are affected by similar major drawbacks such as fairness
and a trust model that relies on third party. In this paper, we demonstrate how
to implement a fair, resistant to denial-of-service, where the honest winner
earns the deposit money {\em immediately}. The game is built on a
permissionless Blockchain that supports Turing complete smart-contract
computation.
|
[{'version': 'v1', 'created': 'Sat, 21 Jul 2018 12:57:14 GMT'}]
|
2018-07-24
|
[array(['Barshap', 'Guy', ''], dtype=object)]
|
4,781 |
1207.2219
|
Veer Awana Dr
|
Anuj Kumar, R. P. Tandon, and V. P. S. Awana
|
Successive spin glass, cluster ferromagnetic, and superparamagnetic
transitions in RuSr2Y1.5Ce0.5Cu2O10 complex magneto-superconductor
|
26 Pages Text + Figures; Comments/Suggestions
([email protected])
|
Eur. Phys. J. B 85, 238-247 (2012)
|
10.1140/epjb/e2012-30075-5
| null |
cond-mat.supr-con cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report structural, DC magnetization, detailed linear/non-linear AC
susceptibility, (with applied frequency and amplitude) isothermal and
thermoremanent magnetization (TRM) behavior for RuSr2Y1.5Ce0.5Cu2O10 (YRu-1222)
magneto-superconductor to understand its complex magnetism. Studied sample is
synthesized through the novel solid state High Pressure (6 GPa) High
Temperature (1450oC) (HPHT) technique. The compound is crystallized in
tetragonal structure with space group I4/mmm (No. 139). DC magnetic
susceptibility shows that studied YRu-1222 is magneto-superconducting with Ru
spins magnetic ordering at around 110 K and superconductivity (SC) in the Cu-O2
planes below ~ 30 K. Frequency and field dependent detailed AC magnetic
susceptibility measurements confirms the spin-glass (SG) behavior with
homogeneous/non-homogeneous ferromagnetic (FM) clusters in this system.
Variation of cusp position with applied AC frequency follows the famous
Vogel-Fulcher law, which is commonly accepted feature for spin-glass (SG)
system with homogeneous/non-homogeneous ferromagnetic clusters embedded in
spin-glass (SG) matrix. Above the freezing temperature (Tf), first and third
harmonics AC susceptibility analysis indicated possibility of the co-existence
of spin cluster ferromagnetism with superparamagnetism (SPM). The M-H loops at
low temperature exhibit the ferromagnetic behavior with rather small coercive
field (Hc) and remnant magnetization (Mr). Summarily, the magnetic (DC and AC)
susceptibility measurements and their analysis have enabled us to unearth the
complex magnetism in terms of successive SG-FM-SPM transitions with
temperature.
|
[{'version': 'v1', 'created': 'Tue, 10 Jul 2012 05:02:44 GMT'}]
|
2015-06-05
|
[array(['Kumar', 'Anuj', ''], dtype=object)
array(['Tandon', 'R. P.', ''], dtype=object)
array(['Awana', 'V. P. S.', ''], dtype=object)]
|
4,782 |
1008.0910
|
Hossein Farajollahi
|
Hossein Farajollahi, Mehrdad Farhoudi, Hossein Shojaie
|
On Dynamics of Brans--Dicke Theory of Gravitation
|
15 pages
|
Int.J.Theor.Phys.49:2558-2568,2010
|
10.1007/s10773-010-0447-6
| null |
gr-qc astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study longstanding problem of cosmological clock in the context of
Brans-Dicke theory of gravitation. We present the Hamiltonian formulation of
the theory for a class of spatially homogenous cosmological models. Then, we
show that formulation of the Brans-Dicke theory in the Einstein frame allows
how an identification of an appropriate cosmological time variable, as a
function of the scalar field in the theory, can be emerged in quantum
cosmology. The classical and quantum results are applied to the
Friedmann-Robertson-Walker cosmological models.
|
[{'version': 'v1', 'created': 'Thu, 5 Aug 2010 04:10:10 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Jun 2011 07:07:32 GMT'}]
|
2011-06-09
|
[array(['Farajollahi', 'Hossein', ''], dtype=object)
array(['Farhoudi', 'Mehrdad', ''], dtype=object)
array(['Shojaie', 'Hossein', ''], dtype=object)]
|
4,783 |
2009.06546
|
Guillaume Salha
|
Walid Bendada and Guillaume Salha and Th\'eo Bontempelli
|
Carousel Personalization in Music Streaming Apps with Contextual Bandits
|
14th ACM Conference on Recommender Systems (RecSys 2020, Best Short
Paper Candidate)
| null |
10.1145/3383313.3412217
| null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Media services providers, such as music streaming platforms, frequently
leverage swipeable carousels to recommend personalized content to their users.
However, selecting the most relevant items (albums, artists, playlists...) to
display in these carousels is a challenging task, as items are numerous and as
users have different preferences. In this paper, we model carousel
personalization as a contextual multi-armed bandit problem with multiple plays,
cascade-based updates and delayed batch feedback. We empirically show the
effectiveness of our framework at capturing characteristics of real-world
carousels by addressing a large-scale playlist recommendation task on a global
music streaming mobile app. Along with this paper, we publicly release
industrial data from our experiments, as well as an open-source environment to
simulate comparable carousel personalization learning problems.
|
[{'version': 'v1', 'created': 'Mon, 14 Sep 2020 16:20:34 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Sep 2020 15:35:12 GMT'}]
|
2020-10-01
|
[array(['Bendada', 'Walid', ''], dtype=object)
array(['Salha', 'Guillaume', ''], dtype=object)
array(['Bontempelli', 'Théo', ''], dtype=object)]
|
4,784 |
1906.04914
|
Suraj Tripathi
|
Abhay Kumar, Nishant Jain, Suraj Tripathi, Chirag Singh
|
From Fully Supervised to Zero Shot Settings for Twitter Hashtag
Recommendation
|
Accepted in CICLing 2019
| null | null | null |
cs.IR cs.CL cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a comprehensive end-to-end pipeline for Twitter hashtags
recommendation system including data collection, supervised training setting
and zero shot training setting. In the supervised training setting, we have
proposed and compared the performance of various deep learning architectures,
namely Convolutional Neural Network (CNN), Recurrent Neural Network (RNN) and
Transformer Network. However, it is not feasible to collect data for all
possible hashtag labels and train a classifier model on them. To overcome this
limitation, we propose a Zero Shot Learning (ZSL) paradigm for predicting
unseen hashtag labels by learning the relationship between the semantic space
of tweets and the embedding space of hashtag labels. We evaluated various
state-of-the-art ZSL methods like Convex combination of Semantic Embedding
(ConSE), Embarrassingly Simple Zero-Shot Learning (ESZSL) and Deep Embedding
Model for Zero-Shot Learning (DEM-ZSL) for the hashtag recommendation task. We
demonstrate the effectiveness and scalability of ZSL methods for the
recommendation of unseen hashtags. To the best of our knowledge, this is the
first quantitative evaluation of ZSL methods to date for unseen hashtags
recommendations from tweet text.
|
[{'version': 'v1', 'created': 'Tue, 11 Jun 2019 17:38:28 GMT'}]
|
2019-06-13
|
[array(['Kumar', 'Abhay', ''], dtype=object)
array(['Jain', 'Nishant', ''], dtype=object)
array(['Tripathi', 'Suraj', ''], dtype=object)
array(['Singh', 'Chirag', ''], dtype=object)]
|
4,785 |
1107.4325
|
Chia-Hsien Shen
|
Chun-Khiang Chua, Wei-Shu Hou, Chia-Hsien Shen
|
Long-Distance Contribution to \Delta\Gamma s/\Gamma s of the
$B_s-\bar{B}_s$ System
|
27 pages, 4 figures
|
Phys. Rev. D 84, 074037 (2011)
|
10.1103/PhysRevD.84.074037
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We estimate the long-distance contribution to the \Delta{\Gamma}s of B_s
system, based mainly on two-body D^(*)_s\Dbar^(*)_s modes and three-body
D^(*)_s\Dbar^(*)\Kbar^(*) modes (and their CP conjugates). Some higher c\bar{s}
resonances are also considered. The contribution to \Delta{\Gamma}s/{\Gamma}s
by two-body modes is 10.2+-3.0%, slightly smaller than the short-distance
result of 13.3+-3.2%. The contribution to width difference by D*_s0(2317),
D_s1(2460), and D_s1(2536) resonances is negligible. For the three-body modes,
we adopt the factorization formalism and model the form factors with off-shell
D^(*)_s poles, the D_{sJ}(2700) resonance, and non-resonant (NR) contributions.
These three-body modes can arise through current-produced or transition
diagrams, but only SU(3)-related D^(*)_{u,d} \Dbar^(*)\Kbar modes from current
diagram have been measured so far. The pole model results for D^*_{u,d}
\Dbar^(*)\Kbar agree well with data, while D_{u,d} \Dbar^(*)\Kbar rates agree
with data only within a factor of 2 to 3. All measured three-body rates can be
reproduced by including NR contribution. The total \Delta{\Gamma}s/{\Gamma}s
obtained is 16.7+-8.5%, which agrees with the short-distance result within
uncertainties. For illustration, we also demonstrate the effect of D_{sJ}(2700)
in modes with D^(*)K^*. In all scenarios, the total width difference remain
consistence to the short-distance result. Our result indicates that (a) the
operator product expansion (OPE) in short-distance picture is a valid
assumption, (b) approximating the two-body decays to saturate width difference
has a large correction, (c) the effect of three-body modes cannot be neglected,
and (d) in addition to D^(*)_s poles, the D_{sJ}(2700) resonance also plays an
important role in three-body modes. Future experiments are necessary to improve
the estimation of \Delta{\Gamma}s from long-distance picture.
|
[{'version': 'v1', 'created': 'Thu, 21 Jul 2011 17:53:49 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Aug 2011 10:05:24 GMT'}]
|
2012-06-13
|
[array(['Chua', 'Chun-Khiang', ''], dtype=object)
array(['Hou', 'Wei-Shu', ''], dtype=object)
array(['Shen', 'Chia-Hsien', ''], dtype=object)]
|
4,786 |
math/0701330
|
Jane Gilman
|
Jane Gilman
|
Canonical Symplectic Representations for Prime Order Conjugacy Classes
of the Mapping-class Group
|
24 pages; change in title; typos corrected; some theorems revised;
computational complexity added; final version of paper to appear in Journal
of Algebra
| null | null | null |
math.GT math.GR
| null |
In this paper we find a unique normal form for the symplectic matrix
representation of the conjugacy class of a prime order element of the
mapping-class group. We find a set of generators for the fundamental group of a
surface with a conformal automorphism of prime order which reflects the action
the automorphism in an optimal way. This is called an {\sl adapted} homotopy
basis and there is a corresponding {\sl adapted presentation}. We also give a
necessary and sufficient condition for a prime order symplectic matrix to be
the image of a prime order element in the mapping-class group.
|
[{'version': 'v1', 'created': 'Thu, 11 Jan 2007 19:37:01 GMT'}
{'version': 'v2', 'created': 'Sun, 17 Jun 2007 12:28:31 GMT'}]
|
2007-06-17
|
[array(['Gilman', 'Jane', ''], dtype=object)]
|
4,787 |
2112.11619
|
Junxiang Wang
|
Junxiang Wang, Hongyi Li, Liang Zhao
|
A Convergent ADMM Framework for Efficient Neural Network Training
|
This work is in progress, a journal extension of the conference
paper: arXiv:1905.13611
| null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
As a well-known optimization framework, the Alternating Direction Method of
Multipliers (ADMM) has achieved tremendous success in many classification and
regression applications. Recently, it has attracted the attention of deep
learning researchers and is considered to be a potential substitute to Gradient
Descent (GD). However, as an emerging domain, several challenges remain
unsolved, including 1) The lack of global convergence guarantees, 2) Slow
convergence towards solutions, and 3) Cubic time complexity with regard to
feature dimensions. In this paper, we propose a novel optimization framework to
solve a general neural network training problem via ADMM (dlADMM) to address
these challenges simultaneously. Specifically, the parameters in each layer are
updated backward and then forward so that parameter information in each layer
is exchanged efficiently. When the dlADMM is applied to specific architectures,
the time complexity of subproblems is reduced from cubic to quadratic via a
dedicated algorithm design utilizing quadratic approximations and backtracking
techniques. Last but not least, we provide the first proof of convergence to a
critical point sublinearly for an ADMM-type method (dlADMM) under mild
conditions. Experiments on seven benchmark datasets demonstrate the
convergence, efficiency, and effectiveness of our proposed dlADMM algorithm.
|
[{'version': 'v1', 'created': 'Wed, 22 Dec 2021 01:55:24 GMT'}]
|
2021-12-23
|
[array(['Wang', 'Junxiang', ''], dtype=object)
array(['Li', 'Hongyi', ''], dtype=object)
array(['Zhao', 'Liang', ''], dtype=object)]
|
4,788 |
1103.3452
|
Michal Heller
|
Michal P. Heller, Romuald A. Janik, Przemyslaw Witaszczyk
|
The characteristics of thermalization of boost-invariant plasma from
holography
|
4 pages, 5 figures; see also the companion article arXiv:1203.0755;
v2: figure corrected (fixes problem with Acrobat); v3: various clarifications
and additional data points added; v4: typo fixed, published
|
Phys. Rev. Lett. 108, 201602 (2012)
|
10.1103/PhysRevLett.108.201602
| null |
hep-th gr-qc hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on the approach towards the hydrodynamic regime of boost-invariant
N=4 super Yang-Mills plasma at strong coupling starting from various
far-from-equilibrium states at tau=0. The results are obtained through
numerical solution of Einstein's equations for the dual geometries, as
described in detail in the companion article arXiv:1203.0755. Despite the very
rich far-from-equilibrium evolution, we find surprising regularities in the
form of clear correlations between initial entropy and total produced entropy,
as well as between initial entropy and the temperature at thermalization,
understood as the transition to a hydrodynamic description. For 29 different
initial conditions that we consider, hydrodynamics turns out to be definitely
applicable for proper times larger than 0.7 in units of inverse temperature at
thermalization. We observe a sizable anisotropy in the energy-momentum tensor
at thermalization, which is nevertheless entirely due to hydrodynamic effects.
This suggests that effective thermalization in heavy ion collisions may occur
significantly earlier than true thermalization.
|
[{'version': 'v1', 'created': 'Thu, 17 Mar 2011 16:25:06 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Mar 2011 10:31:46 GMT'}
{'version': 'v3', 'created': 'Wed, 7 Mar 2012 13:49:07 GMT'}
{'version': 'v4', 'created': 'Tue, 12 Jun 2012 08:38:47 GMT'}]
|
2012-06-13
|
[array(['Heller', 'Michal P.', ''], dtype=object)
array(['Janik', 'Romuald A.', ''], dtype=object)
array(['Witaszczyk', 'Przemyslaw', ''], dtype=object)]
|
4,789 |
2006.13253
|
Thao Nguyen
|
Thao Nguyen, Nakul Gopalan, Roma Patel, Matt Corsaro, Ellie Pavlick,
Stefanie Tellex
|
Robot Object Retrieval with Contextual Natural Language Queries
| null | null | null | null |
cs.RO cs.AI cs.CL cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Natural language object retrieval is a highly useful yet challenging task for
robots in human-centric environments. Previous work has primarily focused on
commands specifying the desired object's type such as "scissors" and/or visual
attributes such as "red," thus limiting the robot to only known object classes.
We develop a model to retrieve objects based on descriptions of their usage.
The model takes in a language command containing a verb, for example "Hand me
something to cut," and RGB images of candidate objects and selects the object
that best satisfies the task specified by the verb. Our model directly predicts
an object's appearance from the object's use specified by a verb phrase. We do
not need to explicitly specify an object's class label. Our approach allows us
to predict high level concepts like an object's utility based on the language
query. Based on contextual information present in the language commands, our
model can generalize to unseen object classes and unknown nouns in the
commands. Our model correctly selects objects out of sets of five candidates to
fulfill natural language commands, and achieves an average accuracy of 62.3% on
a held-out test set of unseen ImageNet object classes and 53.0% on unseen
object classes and unknown nouns. Our model also achieves an average accuracy
of 54.7% on unseen YCB object classes, which have a different image
distribution from ImageNet objects. We demonstrate our model on a KUKA LBR iiwa
robot arm, enabling the robot to retrieve objects based on natural language
descriptions of their usage. We also present a new dataset of 655 verb-object
pairs denoting object usage over 50 verbs and 216 object classes.
|
[{'version': 'v1', 'created': 'Tue, 23 Jun 2020 18:13:40 GMT'}]
|
2020-06-25
|
[array(['Nguyen', 'Thao', ''], dtype=object)
array(['Gopalan', 'Nakul', ''], dtype=object)
array(['Patel', 'Roma', ''], dtype=object)
array(['Corsaro', 'Matt', ''], dtype=object)
array(['Pavlick', 'Ellie', ''], dtype=object)
array(['Tellex', 'Stefanie', ''], dtype=object)]
|
4,790 |
1710.01519
|
Enno Ke{\ss}ler
|
J\"urgen Jost, Enno Ke{\ss}ler, J\"urgen Tolksdorf, Ruijun Wu and
Miaomiao Zhu
|
From harmonic maps to the nonlinear supersymmetric sigma model of
quantum field theory. At the interface of theoretical physics, Riemannian
geometry and nonlinear analysis
| null | null | null | null |
math.DG math-ph math.AP math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Harmonic maps from Riemann surfaces arise from a conformally invariant
variational problem. Therefore, on one hand, they are intimately connected with
moduli spaces of Riemann surfaces, and on the other hand, because the conformal
group is noncompact, constitute a prototype for the formation of singularities,
the so-called bubbles, in geometric analysis. In theoretical physics, they
arise from the nonlinear $\sigma$-model of quantum field theory. That model
possesses a supersymmetric extension, coupling a harmonic map like field with a
nonlinear spinor field. In the physical model, that spinor field is
anticommuting. In this contribution, we analyze both a mathematical version
with a commuting spinor field and the original supersymmetric version.
Moreover, this model gives rise to a further field, a gravitino, that can be
seen as the supersymmetric partner of a Riemann surface metric. Altogether,
this leads to a beautiful combination of concepts from quantum field theory,
structures from Riemannian geometry and Riemann surface theory, and methods of
nonlinear geometric analysis.
|
[{'version': 'v1', 'created': 'Wed, 4 Oct 2017 09:42:45 GMT'}]
|
2017-10-05
|
[array(['Jost', 'Jürgen', ''], dtype=object)
array(['Keßler', 'Enno', ''], dtype=object)
array(['Tolksdorf', 'Jürgen', ''], dtype=object)
array(['Wu', 'Ruijun', ''], dtype=object)
array(['Zhu', 'Miaomiao', ''], dtype=object)]
|
4,791 |
astro-ph/0601550
|
Stephen Skinner
|
S.L. Skinner, A.E. Simmons, S.A. Zhekov, M. Teodoro, A. Damineli, F.
Palla
|
A Rich Population of X-ray Emitting Wolf-Rayet Stars in the Galactic
Starburst Cluster Westerlund 1
|
ApJL, 2006, in press (3 figures, 1 table)
|
Astrophys.J. 639 (2006) L35-L38
|
10.1086/502627
| null |
astro-ph
| null |
Recent optical and IR studies have revealed that the heavily-reddened
starburst cluster Westerlund 1 (Wd 1) contains at least 22 Wolf-Rayet (WR)
stars, comprising the richest WR population of any galactic cluster. We present
results of a senstive Chandra X-ray observation of Wd 1 which detected 12 of
the 22 known WR stars and the mysterious emission line star W9. The fraction of
detected WN stars is nearly identical to that of WC stars. The WN stars WR-A
and WR-B as well as W9 are exceptionally luminous in X-rays and have similar
hard heavily-absorbed spectra with strong Si XIII and S XV emission lines. The
luminous high-temperature X-ray emission of these three stars is characteristic
of colliding wind binary systems but their binary status remains to be
determined. Spectral fits of the X-ray bright sources WR-A and W9 with
isothermal plane-parallel shock models require high absorption column densities
log N$_{H}$ = 22.56 (cm$^{-2}$) and yield characteristic shock temperatures
kT_shock ~ 3 keV (T ~ 35 MK).
|
[{'version': 'v1', 'created': 'Tue, 24 Jan 2006 18:56:02 GMT'}]
|
2009-11-11
|
[array(['Skinner', 'S. L.', ''], dtype=object)
array(['Simmons', 'A. E.', ''], dtype=object)
array(['Zhekov', 'S. A.', ''], dtype=object)
array(['Teodoro', 'M.', ''], dtype=object)
array(['Damineli', 'A.', ''], dtype=object)
array(['Palla', 'F.', ''], dtype=object)]
|
4,792 |
1602.00253
|
Xiaohua Li
|
Xiao-Dong Sun, Ping Guo, Xiao-Hua Li
|
Systematic study of $\alpha$ decay for isomer related nuclei within a
two-potential approach
| null |
PhysRevC.95.014319(2017)
|
10.1103/PhysRevC.95.044303
| null |
nucl-th nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
$\alpha$ decay occurs in both ground states and isomers of nuclei. In this
work, we use the two-potential approach to systematically study whether
isomeric states play a key role on $\alpha$ particle clustering or not. The
results indicate the ratios of $\alpha$ decay preformation probabilities of
isomers to ground states are found to be around 1.
|
[{'version': 'v1', 'created': 'Sun, 31 Jan 2016 14:32:36 GMT'}]
|
2019-04-22
|
[array(['Sun', 'Xiao-Dong', ''], dtype=object)
array(['Guo', 'Ping', ''], dtype=object)
array(['Li', 'Xiao-Hua', ''], dtype=object)]
|
4,793 |
1003.2358
|
Ivan Arzhantsev
|
Ivan V. Arzhantsev
|
Flag varieties as equivariant compactifications of G_a^n
|
4 pages, small corrections
|
Proc. Amer. Math. Soc. 139 (2011), no. 3, 783-786
| null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let G be a semisimple affine algebraic group and P a parabolic subgroup of G.
We classify all flag varieties G/P which admit an action of the commutative
unipotent group G_a^n with an open orbit.
|
[{'version': 'v1', 'created': 'Thu, 11 Mar 2010 16:45:23 GMT'}
{'version': 'v2', 'created': 'Thu, 18 Mar 2010 08:11:25 GMT'}]
|
2011-03-21
|
[array(['Arzhantsev', 'Ivan V.', ''], dtype=object)]
|
4,794 |
1103.4580
|
Antoine Touz\'e
|
Antoine Touz\'e
|
Ringel duality and derivatives of non-additive functors
|
Fourth version, 48 pages. Minor changes (typos corrected, comments
and references added). The article is self-contained (no prior knowledge of
Schur algebras, strict polynomial functors or derived functors of
non-additive functors is required)
| null | null | null |
math.RT math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that Ringel duality in the category of strict polynomial functors
can be interpreted as derived functors of non-additive functors (in the sense
of Dold and Puppe). We give applications of this fact for both theories.
|
[{'version': 'v1', 'created': 'Wed, 23 Mar 2011 17:38:47 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Jun 2012 16:56:06 GMT'}
{'version': 'v3', 'created': 'Wed, 19 Sep 2012 04:09:56 GMT'}
{'version': 'v4', 'created': 'Mon, 18 Feb 2013 14:31:08 GMT'}]
|
2013-02-19
|
[array(['Touzé', 'Antoine', ''], dtype=object)]
|
4,795 |
1409.3831
|
James P. Zibin
|
James. P. Zibin, Adam Moss
|
Nowhere to hide: closing in on cosmological homogeneity
|
6 pages, 3 figures
| null | null | null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Homogeneity is a crucial, but poorly tested, assumption in cosmology. We
introduce a new approach which allows us to place limits on the presence of
localized structures within essentially our entire observable volume, using
cosmic microwave background secondary anisotropies. We find that structures
cannot exceed roughly 20 times their expected amplitude over most of our
observable volume. Similarly, we place tight constraints on statistical
inhomogeneity within our volume, performing the first power spectrum
reconstruction using secondary anisotropies alone. We find that the standard
model passes this important new consistency test. Our approach probes
homogeneity over vastly larger volumes and scales than previous studies based
on surveys.
|
[{'version': 'v1', 'created': 'Fri, 12 Sep 2014 19:45:03 GMT'}]
|
2014-09-15
|
[array(['Zibin', 'James. P.', ''], dtype=object)
array(['Moss', 'Adam', ''], dtype=object)]
|
4,796 |
1607.02817
|
Prasanth K. P.
|
S. B. Balaji, K. P. Prasanth and P. Vijay Kumar
|
Binary Codes with Locality for Four Erasures
|
5 pages, 2 figures
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, codes with locality for four erasures are considered. An upper
bound on the rate of codes with locality with sequential recovery from four
erasures is derived. The rate bound derived here is field independent. An
optimal construction for binary codes meeting this rate bound is also provided.
The construction is based on regular graphs of girth $6$ and employs the
sequential approach of locally recovering from multiple erasures. An extension
of this construction that generates codes which can sequentially recover from
five erasures is also presented.
|
[{'version': 'v1', 'created': 'Mon, 11 Jul 2016 04:32:55 GMT'}
{'version': 'v2', 'created': 'Sun, 30 Oct 2016 17:51:17 GMT'}
{'version': 'v3', 'created': 'Thu, 3 Nov 2016 06:38:44 GMT'}]
|
2016-11-04
|
[array(['Balaji', 'S. B.', ''], dtype=object)
array(['Prasanth', 'K. P.', ''], dtype=object)
array(['Kumar', 'P. Vijay', ''], dtype=object)]
|
4,797 |
2006.11597
|
\'Akos Hajdu
|
\'Akos Hajdu, Naghmeh Ivaki, Imre Kocsis, Attila Klenik, L\'aszl\'o
G\"onczy, Nuno Laranjeiro, Henrique Madeira, Andr\'as Pataricza
|
Using Fault Injection to Assess Blockchain Systems in Presence of Faulty
Smart Contracts
|
Authors' manuscript. Published in IEEE Access 2020. The final
publication is available at IEEE via
http://dx.doi.org/10.1109/ACCESS.2020.3032239
| null |
10.1109/ACCESS.2020.3032239
| null |
cs.SE
|
http://creativecommons.org/licenses/by/4.0/
|
Blockchain has become particularly popular due to its promise to support
business-critical services in very different domains (e.g., retail, supply
chains, healthcare). Blockchain systems rely on complex middleware, like
Ethereum or Hyperledger Fabric, that allow running smart contracts, which
specify business logic in cooperative applications. The presence of software
defects or faults in these contracts has notably been the cause of failures,
including severe security problems. In this paper, we use a software
implemented fault injection (SWIFI) technique to assess the behavior of
permissioned blockchain systems in the presence of faulty smart contracts. We
emulate the occurrence of general software faults (e.g., missing variable
initialization) and also blockchain-specific software faults (e.g., missing
require statement on transaction sender) in smart contracts code to observe the
impact on the overall system dependability (i.e., reliability and integrity).
We also study the effectiveness of formal verification (i.e., done by
solc-verify) and runtime protections (e.g., using the assert statement)
mechanisms in detection of injected faults. Results indicate that formal
verification as well as additional runtime protections have to complement
built-in platform checks to guarantee the proper dependability of blockchain
systems and applications. The work presented in this paper allows smart
contract developers to become aware of possible faults in smart contracts and
to understand the impact of their presence. It also provides valuable
information for middleware developers to improve the behavior (e.g., overall
fault tolerance) of their systems.
|
[{'version': 'v1', 'created': 'Sat, 20 Jun 2020 15:35:55 GMT'}
{'version': 'v2', 'created': 'Thu, 22 Oct 2020 07:16:51 GMT'}]
|
2020-10-23
|
[array(['Hajdu', 'Ákos', ''], dtype=object)
array(['Ivaki', 'Naghmeh', ''], dtype=object)
array(['Kocsis', 'Imre', ''], dtype=object)
array(['Klenik', 'Attila', ''], dtype=object)
array(['Gönczy', 'László', ''], dtype=object)
array(['Laranjeiro', 'Nuno', ''], dtype=object)
array(['Madeira', 'Henrique', ''], dtype=object)
array(['Pataricza', 'András', ''], dtype=object)]
|
4,798 |
0809.4880
|
Hamad Alyahyaei
|
H. M. Alyahyaei and R. A. Jishi
|
Theoretical investigation of magnetic order in ReOFeAs, Re = Ce, Pr
|
5 pages, 4 figures
|
Phys. Rev. B 79, 064516 (2009)
|
10.1103/PhysRevB.79.064516
| null |
cond-mat.supr-con cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Density functional theory (DFT) calculations are carried out on ReOFeAs, Re =
Ce, Pr, the parent compounds of the high-T$_c$ superconductors
ReO$_{1-x}$F$_{x}$FeAs, in order to determine the magnetic order of the ground
state. It is found that the magnetic moments on the Fe sites adopt a collinear
antiferromagnetic order, similar to the case of LaOFeAs. Within the generalized
gradient approximation along with Coulomb onsite repulsion (GGA+U), we show
that the Re magnetic moments also adopt an antiferromagnetic order for which,
within the ReO layer, same spin Re sites lie along a zigzag line perpendicular
to the Fe spin stripes. While within GGA the Re 4f band crosses the Fermi
level, upon inclusion of onsite Coulomb interaction the 4f band splits and
moves away from the Fermi level, making ReOFeAs a Mott insulator.
|
[{'version': 'v1', 'created': 'Mon, 29 Sep 2008 00:58:00 GMT'}
{'version': 'v2', 'created': 'Sat, 15 Nov 2008 19:10:32 GMT'}]
|
2009-03-03
|
[array(['Alyahyaei', 'H. M.', ''], dtype=object)
array(['Jishi', 'R. A.', ''], dtype=object)]
|
4,799 |
1906.08437
|
Michel Dekking
|
Michel Dekking
|
Base phi representations and golden mean beta-expansions
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the base phi representation any natural number is written uniquely as a
sum powers of the golden mean with digits 0 and 1, where one requires that the
product of two consecutive digits is always 0. In this paper we give precise
expressions for the those natural numbers for which the $k$th digit is 1,
proving two conjectures for $k=0,1$. The expressions are all in terms of
generalized Beatty sequences.
|
[{'version': 'v1', 'created': 'Thu, 20 Jun 2019 04:15:34 GMT'}]
|
2019-06-21
|
[array(['Dekking', 'Michel', ''], dtype=object)]
|
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