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|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1,100 |
1606.06365
|
David Politzer
|
David Politzer
|
Physics of the Bacon Internal Resonator Banjo
|
24 pages, 21 figures, 3 linked mp3 sound files
| null | null |
HDP: 16 - 02
|
physics.pop-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The internal resonator banjo, patented and first sold by Fred Bacon around
1906, remains something of a cult favorite and is still produced by some
independent luthiers. According to enthusiasts, the characteristic design
elements produce a sound that is mellower, richer, and of greater complexity
and presence than without them. Aspects of that sound are studied here,
comparing instruments that are otherwise identical and identifying physics
mechanisms that are likely responsible.
|
[{'version': 'v1', 'created': 'Mon, 20 Jun 2016 23:57:09 GMT'}]
|
2016-06-22
|
[array(['Politzer', 'David', ''], dtype=object)]
|
1,101 |
cond-mat/0103034
|
Reinhold Loevenich
|
R. L\"ovenich, A. B. Schumacher, J. S. Dodge, D. S. Chemla, and L. L.
Miller
|
Evidence of phonon mediated coupling between charge transfer and ligand
field excitons in Sr$_2$CuO$_2$Cl$_2$
|
20 pages, 6 figures, submitted to Phys. Rev. B
|
Phys. Rev. B 63, 235104 (2001)
|
10.1103/PhysRevB.63.235104
| null |
cond-mat.str-el cond-mat.supr-con
| null |
We present a comparative experimental and theoretical investigation of the
two--dimensional charge-transfer gap in the strongly correlated material
Sr$_2$CuO$_2$Cl$_2$. We observe an Urbach behaviour in the absorption profile
over a surprisingly wide range of energies and temperatures. We present a model
that accounts for phonon scattering to infinite order and which allows us to
explain the data accurately by assuming coupling of the charge transfer gap
exciton to lower energy electronic excitations.
|
[{'version': 'v1', 'created': 'Thu, 1 Mar 2001 18:20:00 GMT'}]
|
2009-11-07
|
[array(['Lövenich', 'R.', ''], dtype=object)
array(['Schumacher', 'A. B.', ''], dtype=object)
array(['Dodge', 'J. S.', ''], dtype=object)
array(['Chemla', 'D. S.', ''], dtype=object)
array(['Miller', 'L. L.', ''], dtype=object)]
|
1,102 |
2109.09843
|
Fernando Antonio Flor
|
Fernando Antonio Flor, Gabrielle Olinger, Ren\'e Bellwied
|
System Size and Flavour Dependence of Chemical Freeze-out Temperatures
in ALICE Data from pp, pPb and PbPb Collisions at LHC Energies
|
7 pages, 5 figures, 2 tables. Submitted to and accepted by Physics
Letters B
| null |
10.1016/j.physletb.2022.137473
| null |
nucl-ex hep-ex hep-ph nucl-th
|
http://creativecommons.org/licenses/by/4.0/
|
We present the system size and flavour dependence of the chemical freeze-out
temperature ($T_\mathrm{ch}$) at vanishing baryo-chemical potential calculated
via thermal fits to experimental yields for several multiplicity classes in pp,
pPb and PbPb collisions measured by ALICE. Using the Thermal-FIST Hadron
Resonance Gas model package, we compare the quality of fits across various
treatments of strangeness conservation under different freeze-out conditions as
a function of the charged particle multiplicity density $\big \langle
dN_\mathrm{ch}/d\eta \big \rangle$. Additionally, we examine how the
anti-hadron to pion yield ratios of light and strange baryons, as well as the
$\phi$ meson, evolve within a flavour-dependent model. Through a unique
two-temperature chemical freeze-out approach, we show that flavour dependence
of $T_\mathrm{ch}$ in a Strangeness Canonical Ensemble leads to a natural
explanation of strangeness enhancement from small to large systems at LHC
energies without requiring any non-equilibrium particle production at small
$\big \langle dN_\mathrm{ch}/d\eta \big \rangle$.
|
[{'version': 'v1', 'created': 'Mon, 20 Sep 2021 21:02:04 GMT'}
{'version': 'v2', 'created': 'Tue, 27 Sep 2022 19:21:00 GMT'}]
|
2022-10-06
|
[array(['Flor', 'Fernando Antonio', ''], dtype=object)
array(['Olinger', 'Gabrielle', ''], dtype=object)
array(['Bellwied', 'René', ''], dtype=object)]
|
1,103 |
1805.07852
|
Alistair Shilton
|
Alistair Shilton, Sunil Gupta, Santu Rana, Pratibha Vellanki, Laurence
Park, Cheng Li, Svetha Venkatesh, Alessandra Sutti, David Rubin, Thomas
Dorin, Alireza Vahid, Murray Height, Teo Slezak
|
Accelerated Bayesian Optimization throughWeight-Prior Tuning
| null |
PMLR 108:635-645, 2020
| null | null |
stat.ML cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Bayesian optimization (BO) is a widely-used method for optimizing expensive
(to evaluate) problems. At the core of most BO methods is the modeling of the
objective function using a Gaussian Process (GP) whose covariance is selected
from a set of standard covariance functions. From a weight-space view, this
models the objective as a linear function in a feature space implied by the
given covariance K, with an arbitrary Gaussian weight prior ${\bf w} \sim
\mathcal{N} ({\bf 0}, {\bf I})$. In many practical applications there is data
available that has a similar (covariance) structure to the objective, but
which, having different form, cannot be used directly in standard transfer
learning. In this paper we show how such auxiliary data may be used to
construct a GP covariance corresponding to a more appropriate weight prior for
the objective function. Building on this, we show that we may accelerate BO by
modeling the objective function using this (learned) weight prior, which we
demonstrate on both test functions and a practical application to short-polymer
fibre manufacture.
|
[{'version': 'v1', 'created': 'Mon, 21 May 2018 00:33:07 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Feb 2020 22:37:23 GMT'}]
|
2020-07-16
|
[array(['Shilton', 'Alistair', ''], dtype=object)
array(['Gupta', 'Sunil', ''], dtype=object)
array(['Rana', 'Santu', ''], dtype=object)
array(['Vellanki', 'Pratibha', ''], dtype=object)
array(['Park', 'Laurence', ''], dtype=object)
array(['Li', 'Cheng', ''], dtype=object)
array(['Venkatesh', 'Svetha', ''], dtype=object)
array(['Sutti', 'Alessandra', ''], dtype=object)
array(['Rubin', 'David', ''], dtype=object)
array(['Dorin', 'Thomas', ''], dtype=object)
array(['Vahid', 'Alireza', ''], dtype=object)
array(['Height', 'Murray', ''], dtype=object)
array(['Slezak', 'Teo', ''], dtype=object)]
|
1,104 |
1802.00589
|
Tomomi Shimoikura
|
Tomomi Shimoikura, Kazuhito Dobashi, Fumitaka Nakamura, Tomoaki
Matsumoto, and Tomoya Hirota
|
A Statistical Study of Massive Cluster-Forming Clumps
|
38 pages, 18 figures
| null |
10.3847/1538-4357/aaaccd
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report results of the observations of 15 regions in several molecular
lines for a statistical study of massive cluster-forming clumps. We identified
24 clumps based on the C18O (J=1-0) data obtained by the NRO 45 m telescope,
and found that 16 of them are associated with young clusters. The clumps
associated with clusters have a typical mass, radius, and molecular density of
~1 X 10^3 Mo, ~0.5 pc, ~1 X 10^5 cm^-3, respectively. We categorized the clumps
and clusters into four types according to the spatial coincidence of gas and
star density, and discussed their evolutions: Clumps without clusters (Type 1),
clumps showing good correlations with clusters (Type 2), clumps showing poor
correlations with clusters (Type 3), and clusters with no associated clumps
(Type 4). Analyses of the velocity structures and the chemical compositions
imply that the clump + cluster systems should evolve from Type 1 to Type 4. We
found that some of the Type 2 clumps are infalling on the clump-scale to form
clusters at the clump center, which should commonly occur in the beginning of
cluster formation. Interestingly, all of the identified Type 1 clumps are
likely to be older than the Type 2 clumps in terms of chemical compositions,
suggesting that they have been gravitationally stable for a long time possibly
being supported by the strong magnetic field of > 1 mG.Type 1 clumps younger
than the observed Type 2 clumps should be very rare to find because of their
short lifetime.
|
[{'version': 'v1', 'created': 'Fri, 2 Feb 2018 07:56:08 GMT'}]
|
2018-03-21
|
[array(['Shimoikura', 'Tomomi', ''], dtype=object)
array(['Dobashi', 'Kazuhito', ''], dtype=object)
array(['Nakamura', 'Fumitaka', ''], dtype=object)
array(['Matsumoto', 'Tomoaki', ''], dtype=object)
array(['Hirota', 'Tomoya', ''], dtype=object)]
|
1,105 |
1603.07826
|
Taekyun Kim
|
Taekyun Kim, Dae San Kim
|
Some identities of Eulerian polynomials arising from nonlinear
differential equations
|
9 pages
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study nonlinear differential equations arising from
Eulerian polynomials and their applications. From our study of nonlinear
differential equations, we derive some new and explicit identities involving
Eulerian and higher-order Eulerian polynomials.
|
[{'version': 'v1', 'created': 'Fri, 25 Mar 2016 05:44:55 GMT'}]
|
2016-03-28
|
[array(['Kim', 'Taekyun', ''], dtype=object)
array(['Kim', 'Dae San', ''], dtype=object)]
|
1,106 |
math/0107211
|
Tian-Jun Li
|
Tian-Jun Li and Ai-Ko Liu
|
Family Seiberg-Witten invariants and wall crossing formulas
|
46 pages Typos corrected, references updated, Theorem 2.2 made more
precise
| null | null | null |
math.GT math.SG
| null |
In this paper we set up the family Seiberg-Witten theory. It can be applied
to the counting of nodal pseudo-holomorphic curves in a symplectic 4-manifold
(especially a Kahler surface). A new feature in this theory is that the chamber
structure plays a more prominent role. We derive some wall crossing formulas
measuring how the family Seiberg-Witten invariants change from one chamber to
another.
|
[{'version': 'v1', 'created': 'Sun, 29 Jul 2001 16:46:00 GMT'}
{'version': 'v2', 'created': 'Fri, 31 Aug 2001 19:02:19 GMT'}]
|
2007-05-23
|
[array(['Li', 'Tian-Jun', ''], dtype=object)
array(['Liu', 'Ai-Ko', ''], dtype=object)]
|
1,107 |
2204.12357
|
Ali Sadeghi Sadeghi
|
Nick Willemstein and Herman van der Kooij and Ali Sadeghi
|
Direct 3D Printing of Soft Fluidic Actuators with Graded Porosity
| null | null |
10.1039/D2SM00524G
| null |
cs.RO
|
http://creativecommons.org/licenses/by/4.0/
|
New additive manufacturing methods are needed to realize more complex soft
robots. One example is soft fluidic robotics, which exploits fluidic power and
stiffness gradients. Porous structures are an interesting type for this
approach, as they are flexible and allow for fluid transport. Within this work,
the Infill-Foam (InFoam) is proposed to print structures with graded porosity
by liquid rope coiling (LRC). By exploiting LRC, the InFoam method could
exploit the repeatable coiling patterns to print structures. To this end, only
the characterization of the relation between nozzle height and coil radius and
the extruded length were necessary (at a fixed temperature). Then by adjusting
the nozzle height and/or extrusion speed the porosity of the printed structure
could be set. The InFoam method was demonstrated by printing porous structures
using styrene-ethylene-butylene-styrene (SEBS) with porosities ranging from
46\% to 89\%. In compression tests, the cubes showed large changes in modulus
(more than 200 times), density (-89\% compared to bulk), and energy
dissipation. The InFoam method combined coiling and normal plotting to realize
a large range of porosity gradients. This grading was exploited to realize
rectangular structures with varying deformation patterns, which included
twisting, contraction, and bending. Furthermore, the InFoam method was shown to
be capable of programming the behavior of bending actuators by varying the
porosity. Both the output force and stroke showed correlations similar to those
of the cubes. Thus, the InFoam method can fabricate and program the mechanical
behavior of a soft fluidic (porous) actuator by grading porosity.
|
[{'version': 'v1', 'created': 'Tue, 26 Apr 2022 14:55:36 GMT'}]
|
2022-10-27
|
[array(['Willemstein', 'Nick', ''], dtype=object)
array(['van der Kooij', 'Herman', ''], dtype=object)
array(['Sadeghi', 'Ali', ''], dtype=object)]
|
1,108 |
1710.04895
|
Muhammad Ahmad
|
Muhammad Ahmad
|
Measurements of associated production of vector bosons and jets in CMS
| null | null | null | null |
hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The most recent results of Standard Model physics using 8 and 13 TeV
proton-proton collision data recorded by the CMS detector during the LHC Runs I
and II are reviewed. This overview includes studies of several results of
vector boson production in association with jets. The outlined results are
compared to the corresponding theoretical predictions and no significant
deviation is observed.
|
[{'version': 'v1', 'created': 'Fri, 13 Oct 2017 12:50:01 GMT'}]
|
2017-10-16
|
[array(['Ahmad', 'Muhammad', ''], dtype=object)]
|
1,109 |
1301.6124
|
David Choi
|
David S. Choi, Adam P. Showman, and Robert H. Brown
|
Cloud Features and Zonal Wind Measurements of Saturn's Atmosphere as
Observed by Cassini/VIMS
|
34 pages, 11 figures
|
Journal of Geophysical Research (Planets) 114 (2009) E04007
|
10.1029/2008JE003254
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an analysis of data about Saturn's atmosphere from Cassini's
Visual and Infrared Mapping Spectrometer (VIMS), focusing on the meteorology of
the features seen in the 5-micron spectral window. We present VIMS mosaics and
discuss the morphology and general characteristics of the features backlit by
Saturn's thermal emission. We have also constructed a zonal wind profile from
VIMS feature tracking observation sequences using an automated cloud feature
tracker. Comparison with previously constructed profiles from Voyager and
Cassini imaging data reveals broad similarities, suggesting minimal vertical
shear of the zonal wind. However, areas of apparent wind shear are present in
the VIMS zonal wind profile at jet stream cores. In particular, our analysis
shows that the equatorial jet reaches speeds exceeding 450 m/s, similar to
speeds obtained during the Voyager era. This suggests that recent inferences of
relatively slower jet speeds of ~275-375 m/s are confined to the upper
troposphere and that the deep (>1 bar) jet has not experienced a significant
slowdown. Our measurements of the numerous dark, spotted features seen in the
VIMS mosaics reveals that most of these features have diameters less than 1000
km and reside in confined zonal bands between jet stream cores. We propose that
these spot features are vortices and that VIMS and ISS are sensing the same
vortices at two different pressure levels. The local structure at the zonal jet
streams remains complex, as VIMS may be sensing cloud features that are deeper
than the NH3 cloud deck.
|
[{'version': 'v1', 'created': 'Fri, 25 Jan 2013 18:53:54 GMT'}]
|
2013-01-28
|
[array(['Choi', 'David S.', ''], dtype=object)
array(['Showman', 'Adam P.', ''], dtype=object)
array(['Brown', 'Robert H.', ''], dtype=object)]
|
1,110 |
cond-mat/9705122
|
Rajiv Singh
|
Martin P. Gelfand and Rajiv R. P. Singh
|
Tests of magnetic Hamiltonians for CaV_4O_9
|
3 pages, revtex, 2 ps-figures. Submitted to PRB brief report
| null | null | null |
cond-mat.str-el
| null |
We study the uniform magnetic susceptibility and spin-gap for recently
proposed Heisenberg model Hamiltonians for CaV_4O_9 based on the orbital
ordering scenario of Marini and Khomskii and the LDA calculations of Pickett.
We argue that the experimentally observed uniform susceptibility data is
inconsistent with the weakly coupled dimer picture of Marini and Khomskii. The
model proposed by Pickett can, with appropriate choice of parameters, lead to
an explanation for the observed gap and uniform susceptibility. The resulting
agreement with experiments is of a similar quality to previously studied
models. We argue that this new model is best distinguished from previous ones
by neutron or Raman scattering experiments, via the location of the excitation
minimum in the Brillouin zone and by the possible existence or non-existence of
sharply defined singlet excitations.
|
[{'version': 'v1', 'created': 'Tue, 13 May 1997 16:43:34 GMT'}]
|
2008-02-03
|
[array(['Gelfand', 'Martin P.', ''], dtype=object)
array(['Singh', 'Rajiv R. P.', ''], dtype=object)]
|
1,111 |
1206.2218
|
Bruno Machet
|
Bruno Machet (LPTHE)
|
Unlocking the Standard Model. I. 1 generation of quarks. Symmetries
|
A misprint in eq. (13) has been corrected (h^3 -> h^2)
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A very specific two-Higgs-doublet extension of the Glashow-Salam-Weinberg
model for one generation of quarks is advocated for, in which the two doublets
are parity transformed of each other and both isomorphic to the Higgs doublet
of the Standard Model. The chiral group U(2)_L X U(2)_R gets broken down to
U(1) X U(1)_{em}. In there, the first diagonal U(1) is directly connected to
parity through the U(1)_LX U(1)_R algebra. Both chiral and weak symmetry
breaking can be accounted for, together with their relevant degrees of freedom.
The two Higgs doublets are demonstrated to be in one-to-one correspondence with
bilinear quark operators.
|
[{'version': 'v1', 'created': 'Mon, 11 Jun 2012 14:22:17 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Oct 2012 08:36:39 GMT'}]
|
2012-10-30
|
[array(['Machet', 'Bruno', '', 'LPTHE'], dtype=object)]
|
1,112 |
1604.00910
|
Bingshan Tao
|
B. S. Tao, H. X. Yang, Y. L. Zuo, X. Devaux, G. Lengaigne, M. Hehn, D.
Lacour, S. Andrieu, M. Chshiev, T. Hauet, F. Montaigne, S. Mangin, X. F. Han,
Y. Lu
|
Long range phase coherencein double barrier magnetic tunnel junctions
with large thick metallic quantum well
|
16 pages, 3 figures 1 table
| null |
10.1103/PhysRevLett.115.157204
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Double barrier heterostructures are model systems for the study of electron
tunneling and discrete energy levels in a quantum well (QW). Until now resonant
tunneling phenomena in metallicQW have been observed for limited thicknesses
(1-2 nm) under which electron phase coherence is conserved. In the present
study we show evidence of QW resonance states in Fe QW up to12 nmthick and at
room temperature in fully epitaxial doubleMgAlOxbarrier magnetic tunnel
junctions. The electron phase coherence displayed in this QWis of unprecedented
quality because ofa homogenous interface phase shift due to the small lattice
mismatch at the Fe/MgAlOx interface. The physical understanding of the critical
role of interface strain on QW phase coherence will greatly promote the
development of the spin-dependent quantum resonant tunneling applications.
|
[{'version': 'v1', 'created': 'Wed, 2 Sep 2015 10:11:31 GMT'}]
|
2016-04-13
|
[array(['Tao', 'B. S.', ''], dtype=object)
array(['Yang', 'H. X.', ''], dtype=object)
array(['Zuo', 'Y. L.', ''], dtype=object)
array(['Devaux', 'X.', ''], dtype=object)
array(['Lengaigne', 'G.', ''], dtype=object)
array(['Hehn', 'M.', ''], dtype=object)
array(['Lacour', 'D.', ''], dtype=object)
array(['Andrieu', 'S.', ''], dtype=object)
array(['Chshiev', 'M.', ''], dtype=object)
array(['Hauet', 'T.', ''], dtype=object)
array(['Montaigne', 'F.', ''], dtype=object)
array(['Mangin', 'S.', ''], dtype=object)
array(['Han', 'X. F.', ''], dtype=object)
array(['Lu', 'Y.', ''], dtype=object)]
|
1,113 |
physics/0603237
|
Yuri A. Rylov
|
Yuri A. Rylov
|
Uniform formalism for description of dynamic quantum and stochastic
systems
|
29 pages, 0 figure, Transformation to format of AMTP for submission
to Advances in Mathematical and Theoretical Physics
| null | null | null |
physics.gen-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The formalism of the particle dynamics in the space-time, where motion of
free particles is primordially stochastic, is considered. The conventional
dynamic formalism, obtained for the space-time, where the motion of free
particles is primordially deterministic, seems to be unsuitable. The
statistical ensemble of stochastic (or deterministic) systems is considered to
be the main object of dynamics. At such a logical reloading the statistical
description becomes a component of dynamics, and capacities of dynamics
increase. At such an approach one can describe deterministic, stochastic and
quantum particles by means of the uniform technique. The quantum particle is
described as a stochastic particle, i.e. without a reference to the quantum
principles. Besides, by means of this technique one can describe classical
inviscid fluid. There are four different versions of the formalism: (1)
description in Euler dynamic variables, (2) description in Lagrange dynamic
variables, (3) description in terms of the generalized stream function, (4)
description in terms of the wave function. The uniform formalism is purely
dynamic. Even describing stochastic systems, it does not refer to probability
and probabilistic structures. In relativistic case the uniform formalism can
describe pair production and pair annihilation.
|
[{'version': 'v1', 'created': 'Tue, 28 Mar 2006 10:03:18 GMT'}
{'version': 'v2', 'created': 'Sat, 20 May 2006 07:04:37 GMT'}
{'version': 'v3', 'created': 'Thu, 7 Dec 2006 13:36:06 GMT'}
{'version': 'v4', 'created': 'Sun, 17 Dec 2006 15:54:00 GMT'}
{'version': 'v5', 'created': 'Sat, 4 Dec 2010 13:12:40 GMT'}
{'version': 'v6', 'created': 'Mon, 27 Dec 2010 07:47:57 GMT'}
{'version': 'v7', 'created': 'Fri, 18 Mar 2011 08:13:47 GMT'}]
|
2011-03-21
|
[array(['Rylov', 'Yuri A.', ''], dtype=object)]
|
1,114 |
2110.15463
|
Prathamesh Joshi
|
Chad Hanna, Prathamesh Joshi, Rachael Huxford, Kipp Cannon, Sarah
Caudill, Chiwai Chan, Bryce Cousins, Jolien D. E. Creighton, Becca Ewing,
Miguel Fernandez, Heather Fong, Patrick Godwin, Ryan Magee, Duncan Meacher,
Cody Messick, Soichiro Morisaki, Debnandini Mukherjee, Hiroaki Ohta,
Alexander Pace, Stephen Privitera, Surabhi Sachdev, Shio Sakon, Divya Singh,
Ron Tapia, Leo Tsukada, Daichi Tsuna, Takuya Tsutsui, Koh Ueno, Aaron Viets,
Leslie Wade, Madeline Wade, and Jonathan Wang
|
Metric Assisted Stochastic Sampling (MASS) search for gravitational
waves from binary black hole mergers
|
12 pages, 6 figures
|
Phys. Rev. D 106, 084033, 2022
|
10.1103/PhysRevD.106.084033
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel gravitational wave detection algorithm that conducts a
matched filter search stochastically across the compact binary parameter space
rather than relying on a fixed bank of template waveforms. This technique is
competitive with standard template-bank-driven pipelines in both computational
cost and sensitivity. However, the complexity of the analysis is simpler
allowing for easy configuration and horizontal scaling across heterogeneous
grids of computers. To demonstrate the method we analyze approximately one
month of public LIGO data from July 27 00:00 2017 UTC - Aug 25 22:00 2017 UTC
and recover eight known confident gravitational wave candidates. We also inject
simulated binary black hole (BBH) signals to demonstrate the sensitivity.
|
[{'version': 'v1', 'created': 'Thu, 28 Oct 2021 23:45:50 GMT'}
{'version': 'v2', 'created': 'Thu, 17 Mar 2022 15:59:12 GMT'}
{'version': 'v3', 'created': 'Mon, 3 Oct 2022 23:27:45 GMT'}]
|
2023-05-30
|
[array(['Hanna', 'Chad', ''], dtype=object)
array(['Joshi', 'Prathamesh', ''], dtype=object)
array(['Huxford', 'Rachael', ''], dtype=object)
array(['Cannon', 'Kipp', ''], dtype=object)
array(['Caudill', 'Sarah', ''], dtype=object)
array(['Chan', 'Chiwai', ''], dtype=object)
array(['Cousins', 'Bryce', ''], dtype=object)
array(['Creighton', 'Jolien D. E.', ''], dtype=object)
array(['Ewing', 'Becca', ''], dtype=object)
array(['Fernandez', 'Miguel', ''], dtype=object)
array(['Fong', 'Heather', ''], dtype=object)
array(['Godwin', 'Patrick', ''], dtype=object)
array(['Magee', 'Ryan', ''], dtype=object)
array(['Meacher', 'Duncan', ''], dtype=object)
array(['Messick', 'Cody', ''], dtype=object)
array(['Morisaki', 'Soichiro', ''], dtype=object)
array(['Mukherjee', 'Debnandini', ''], dtype=object)
array(['Ohta', 'Hiroaki', ''], dtype=object)
array(['Pace', 'Alexander', ''], dtype=object)
array(['Privitera', 'Stephen', ''], dtype=object)
array(['Sachdev', 'Surabhi', ''], dtype=object)
array(['Sakon', 'Shio', ''], dtype=object)
array(['Singh', 'Divya', ''], dtype=object)
array(['Tapia', 'Ron', ''], dtype=object)
array(['Tsukada', 'Leo', ''], dtype=object)
array(['Tsuna', 'Daichi', ''], dtype=object)
array(['Tsutsui', 'Takuya', ''], dtype=object)
array(['Ueno', 'Koh', ''], dtype=object)
array(['Viets', 'Aaron', ''], dtype=object)
array(['Wade', 'Leslie', ''], dtype=object)
array(['Wade', 'Madeline', ''], dtype=object)
array(['Wang', 'Jonathan', ''], dtype=object)]
|
1,115 |
1708.00579
|
Hajime Tanaka
|
Taiki Yanagishima, John Russo, and Hajime Tanaka
|
Common mechanism of thermodynamic and mechanical origin for ageing and
crystallisation of glasses
|
13 pages, 13 figures
|
Nature Communications 8,15954 (2017)
|
10.1038/ncomms15954
| null |
cond-mat.soft cond-mat.dis-nn cond-mat.mtrl-sci cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The glassy state is known to undergo slow structural relaxation, where the
system progressively explores lower free-energy minima which are either
amorphous (ageing) or crystalline (devitrification). Recently, there is growing
interest in the unusual intermittent collective displacements of a large number
of particles known as "avalanches". However, their structural origin and
dynamics are yet to be fully addressed. Here, we study hard-sphere glasses
which either crystallise or age depending on the degree of size polydispersity,
and show that a small number of particles are thermodynamically driven to
rearrange in regions of low density and bond orientational order. This causes a
transient loss of mechanical equilibrium which facilitates a large cascade of
motion. Combined with previously identified phenomenology, we have a complete
kinetic pathway for structural change which is common to both ageing and
crystallisation. Furthermore, this suggests that transient force balance is
what distinguishes glasses from supercooled liquids.
|
[{'version': 'v1', 'created': 'Wed, 2 Aug 2017 02:33:01 GMT'}]
|
2017-08-03
|
[array(['Yanagishima', 'Taiki', ''], dtype=object)
array(['Russo', 'John', ''], dtype=object)
array(['Tanaka', 'Hajime', ''], dtype=object)]
|
1,116 |
hep-ph/0210243
|
Xiao-Gang He
|
H.-K. Fu, X.-G. He, Y.-K. Hsiao and J.-Q. Shi (NTU)
|
SU(3) Predictions of $B\to PP$ Decays in the Standard Model
|
4 pages, no figure. Talk present at the 5th International Conference
on Hyperons, Charm and Beauty Hadrons, Vancouver, June 2002
|
Nucl.Phys.Proc.Suppl. 115 (2003) 279-282
|
10.1016/S0920-5632(02)02001-7
| null |
hep-ph
| null |
With SU(3) symmetry one only needs 13 hadronic parameters to describe $B\to
PP$ decays in the Standard Model. When annihilation contributions are
neglected, only 7 hadronic parameters are needed. These parameters can be
determined from existing experimental data and some unmeasured branching ratios
and CP asymmetries of the type $B\to PP$ can be predicted. In this talk we
present SU(3) predictions of branching ratios and CP asymmetries for $B\to PP$
decays in the Standard Model.
|
[{'version': 'v1', 'created': 'Thu, 17 Oct 2002 05:55:14 GMT'}]
|
2009-11-07
|
[array(['Fu', 'H. -K.', '', 'NTU'], dtype=object)
array(['He', 'X. -G.', '', 'NTU'], dtype=object)
array(['Hsiao', 'Y. -K.', '', 'NTU'], dtype=object)
array(['Shi', 'J. -Q.', '', 'NTU'], dtype=object)]
|
1,117 |
0811.4355
|
Krzysztof Pachucki
|
Krzysztof Pachucki and Jacek Komasa
|
Nonadiabatic corrections to rovibrational levels of H$_2$
|
14 pages
| null |
10.1063/1.3114680
| null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The leading nonadiabatic corrections to rovibrational levels of a diatomic
molecule are expressed in terms of three functions of internuclear distance:
corrections to the adiabatic potential, the effective nuclear mass, and the
effective moment of inertia. The resulting radial Schr\"odinger equation for
nuclear motion is solved numerically yielding accurate nonadiabatic energies
for all rovibrational levels of H$_2$ molecule in excellent agreement with
previous calculations by Wolniewicz.
|
[{'version': 'v1', 'created': 'Wed, 26 Nov 2008 16:08:09 GMT'}
{'version': 'v2', 'created': 'Sat, 24 Jan 2009 14:35:50 GMT'}]
|
2015-05-13
|
[array(['Pachucki', 'Krzysztof', ''], dtype=object)
array(['Komasa', 'Jacek', ''], dtype=object)]
|
1,118 |
1001.5093
|
Khanh Tran Vu
|
Tran Vu Khanh
|
A general method of weights in the d-bar-Neumann problem
|
A Thesis submitted for the degree of Doctor of Philosophy in front of
the Committee composed by Joseph J. Kohn (President); Jeffery D. Mc.Neal;
Emil J. Straube. Supervisor: Giuseppe Zampieri. 121 pages
| null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This thesis deals with Partial Differential Equations in Several Complex
Variables and especially focuses on a general estimate for the
$\bar\partial$-Neumann problem on a domain which is $q$-pseudoconvex or
$q$-pseudoconcave at a boundary point $z_0$. Generalizing Property ($P$) by
\cite{C84}, we define Property $(f\T-\M\T-P)^k$ at $z_0$. This property yields
the estimate {(f\T-\M)^k} \qquad \no{f(\Lambda)\mathcal M u}^2\le
c(\no{\bar\partial u}^2+\no{\bar\partial^*u}^2+\no{u}^2)+C_\M\no{u}^2_{-1} for
any $u\in C^\infty_c(U\cap \bar{\Omega})^k\cap \T{Dom}(\dib^*)$ where $U$ is a
neighborhood of $z_0$. We want to point out that under a suitable choice of $f$
and $\M$, $(f\T-\M)^k$ is the subelliptic, superlogarithmic, compactness and
subelliptic multiplier estimate.
The thesis also aims at exhibiting some relevant classes of domains which
enjoy Property $(f\T-\M\T-P)^k$ and at discussing recent literature on the
$\bar\partial$-Neumann problem in the framework of this property.
|
[{'version': 'v1', 'created': 'Thu, 28 Jan 2010 03:25:24 GMT'}]
|
2010-01-29
|
[array(['Khanh', 'Tran Vu', ''], dtype=object)]
|
1,119 |
2112.14850
|
Jacob Henshaw
|
Jacob Henshaw, Pauli Kehayias, Maziar Saleh Ziabari, Michael Titze,
Erin Morissette, Kenji Watanabe, Takashi Taniguchi, J.I.A Li, Victor M.
Acosta, Edward Bielejec, Michael P. Lilly, Andrew M. Mounce
|
Nanoscale Solid-State Nuclear Quadrupole Resonance Spectroscopy using
Depth-Optimized Nitrogen-Vacancy Ensembles in Diamond
| null | null |
10.1063/5.0083774
| null |
cond-mat.mes-hall quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR)
spectroscopy of bulk quantum materials have provided insight into phenomena
such as quantum phase criticality, magnetism, and superconductivity. With the
emergence of nanoscale 2-D materials with magnetic phenomena,
inductively-detected NMR and NQR spectroscopy are not sensitive enough to
detect the smaller number of spins in nanomaterials. The nitrogen-vacancy (NV)
center in diamond has shown promise in bringing the analytic power of NMR and
NQR spectroscopy to the nanoscale. However, due to depth-dependent formation
efficiency of the defect centers, noise from surface spins, band bending
effects, and the depth dependence of the nuclear magnetic field, there is
ambiguity regarding the ideal NV depth for surface NMR of
statistically-polarized spins. In this work, we prepared a range of shallow NV
ensemble layer depths and determined the ideal NV depth by performing NMR
spectroscopy on statistically-polarized \fluorine{} in Fomblin oil on the
diamond surface. We found that the measurement time needed to achieve an SNR of
3 using XY8-N noise spectroscopy has a minimum at an NV depth of 5.4 nm. To
demonstrate the sensing capabilities of NV ensembles, we perform NQR
spectroscopy on the \boron{} of hexagonal boron nitride flakes. We compare our
best diamond to previous work with a single NV and find that this ensemble
provides a shorter measurement time with excitation diameters as small as 4
$\mu$m. This analysis provides ideal conditions for further experiments
involving NMR/NQR spectroscopy of 2-D materials with magnetic properties.
|
[{'version': 'v1', 'created': 'Wed, 29 Dec 2021 22:19:17 GMT'}]
|
2022-05-11
|
[array(['Henshaw', 'Jacob', ''], dtype=object)
array(['Kehayias', 'Pauli', ''], dtype=object)
array(['Ziabari', 'Maziar Saleh', ''], dtype=object)
array(['Titze', 'Michael', ''], dtype=object)
array(['Morissette', 'Erin', ''], dtype=object)
array(['Watanabe', 'Kenji', ''], dtype=object)
array(['Taniguchi', 'Takashi', ''], dtype=object)
array(['Li', 'J. I. A', ''], dtype=object)
array(['Acosta', 'Victor M.', ''], dtype=object)
array(['Bielejec', 'Edward', ''], dtype=object)
array(['Lilly', 'Michael P.', ''], dtype=object)
array(['Mounce', 'Andrew M.', ''], dtype=object)]
|
1,120 |
cond-mat/0311151
|
Koji Muraki
|
K. Muraki, J. G. S. Lok, S. Kraus, W. Dietsche, K. von Klitzing, D.
Schuh, M. Bichler, W. Wegscheider
|
Coulomb Drag as a Probe of the Nature of Compressible States in a
Magnetic Field
|
5 pages, 4 figures
|
Phys. Rev. Lett. 92, 246801 (2004)
|
10.1103/PhysRevLett.92.246801
| null |
cond-mat.mes-hall
| null |
Magneto-drag reveals the nature of compressible states and the underlying
interplay of disorder and interactions. At \nu=3/2 a clear T^{4/3} dependence
is observed, which signifies the metallic nature of the N=0 Landau level. In
contrast, drag in higher Landau levels reveals an additional contribution,
which anomalously grows with decreasing T before turning to zero following a
thermal activation law. The anomalous drag is discussed in terms of
electron-hole asymmetry arising from disorder and localization, and the
crossover to normal drag at high fields as due to screening of disorder.
|
[{'version': 'v1', 'created': 'Fri, 7 Nov 2003 08:43:54 GMT'}]
|
2007-05-23
|
[array(['Muraki', 'K.', ''], dtype=object)
array(['Lok', 'J. G. S.', ''], dtype=object)
array(['Kraus', 'S.', ''], dtype=object)
array(['Dietsche', 'W.', ''], dtype=object)
array(['von Klitzing', 'K.', ''], dtype=object)
array(['Schuh', 'D.', ''], dtype=object)
array(['Bichler', 'M.', ''], dtype=object)
array(['Wegscheider', 'W.', ''], dtype=object)]
|
1,121 |
2203.00004
|
Hongyu Zhu
|
Hongyu Zhu, Stefan Klus and Tuhin Sahai
|
A Dynamic Mode Decomposition Approach for Decentralized Spectral
Clustering of Graphs
|
Accepted by IEEE CCTA 2022
| null | null | null |
cs.LG cs.DC cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a novel robust decentralized graph clustering algorithm that is
provably equivalent to the popular spectral clustering approach. Our proposed
method uses the existing wave equation clustering algorithm that is based on
propagating waves through the graph. However, instead of using a fast Fourier
transform (FFT) computation at every node, our proposed approach exploits the
Koopman operator framework. Specifically, we show that propagating waves in the
graph followed by a local dynamic mode decomposition (DMD) computation at every
node is capable of retrieving the eigenvalues and the local eigenvector
components of the graph Laplacian, thereby providing local cluster assignments
for all nodes. We demonstrate that the DMD computation is more robust than the
existing FFT based approach and requires 20 times fewer steps of the wave
equation to accurately recover the clustering information and reduces the
relative error by orders of magnitude. We demonstrate the decentralized
approach on a range of graph clustering problems.
|
[{'version': 'v1', 'created': 'Sat, 26 Feb 2022 03:48:35 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Aug 2022 15:59:43 GMT'}]
|
2022-08-30
|
[array(['Zhu', 'Hongyu', ''], dtype=object)
array(['Klus', 'Stefan', ''], dtype=object)
array(['Sahai', 'Tuhin', ''], dtype=object)]
|
1,122 |
2111.07226
|
Kostis Kaffes
|
Kostis Kaffes and Neeraja J. Yadwadkar and Christos Kozyrakis
|
Practical Scheduling for Real-World Serverless Computing
| null | null | null | null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Serverless computing has seen rapid growth due to the ease-of-use and
cost-efficiency it provides. However, function scheduling, a critical component
of serverless systems, has been overlooked. In this paper, we take a
first-principles approach toward designing a scheduler that caters to the
unique characteristics of serverless functions as seen in real-world
deployments. We first create a taxonomy of scheduling policies along three
dimensions. Next, we use simulation to explore the scheduling policy space for
the function characteristics in a 14-day trace of Azure functions and conclude
that frequently used features such as late binding and random load balancing
are sub-optimal for common execution time distributions and load ranges. We use
these insights to design Hermes, a scheduler for serverless functions with
three key characteristics. First, to avoid head-of-line blocking due to high
function execution time variability, Hermes uses a combination of early binding
and processor sharing for scheduling at individual worker machines. Second,
Hermes uses a hybrid load balancing approach that improves consolidation at low
load while employing least-loaded balancing at high load to retain high
performance. Third, Hermes is both load and locality-aware, reducing the number
of cold starts compared to pure load-based policies. We implement Hermes for
Apache OpenWhisk and demonstrate that, for the case of the function patterns
observed both in the Azure and in other real-world traces, it achieves up to
85% lower function slowdown and 60% higher throughput compared to existing
policies.
|
[{'version': 'v1', 'created': 'Sun, 14 Nov 2021 02:55:48 GMT'}]
|
2021-11-16
|
[array(['Kaffes', 'Kostis', ''], dtype=object)
array(['Yadwadkar', 'Neeraja J.', ''], dtype=object)
array(['Kozyrakis', 'Christos', ''], dtype=object)]
|
1,123 |
2307.02262
|
Aytul Adiguzel
|
A.Ad{\i}g\"uzel, H.\c{C}etinkaya, \c{S}.Esen, D.Halis, T.B.\.Ilhan,
A.K{\i}l{\i}\c{c}gedik, S.O\u{g}ur, S.\"Oz, A.\"Ozbey, V.E.\"Ozcan,
N.G.\"Unel
|
Low-energy Ion Beam Diagnostics: An Integrated Solution
| null | null | null | null |
physics.acc-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
High gradient accelerator injectors have been widely studied throughout the
world-leading accelerator facilities. The demand for high frequency cavities
have led the Detector, Accelerator and instrumentation laboratory (KAHVELab) in
Istanbul to deploy a four-vane Radio Frequency Quadrupole (RFQ) operating at
800~MHz to accelerate 20~keV protons to 2~MeV. The protons from the microwave
discharge ion source are transversely matched to the RFQ via an optimized Low
Energy Beam Transport (LEBT) line which also contains an integrated measurement
station, called measurement station (MBOX). The MBOX is used to measure the
proton beam's current along with pulse length duration, profile as well as the
beam emittance upstream of the RFQ. It contains a number of home-built
diagnostic tools: a Faraday cup, a scintillator screen and a pepper pot plate
(PP). The analysis software is also locally developed and tested for the PP
photo analysis. In this note, the design, construction and tests of the
integrated measurement station are discussed. The results from various
measurements, especially on beam profile and charge, are compared to the
simulation predictions.
|
[{'version': 'v1', 'created': 'Wed, 5 Jul 2023 13:00:48 GMT'}]
|
2023-07-06
|
[array(['Adıgüzel', 'A.', ''], dtype=object)
array(['Çetinkaya', 'H.', ''], dtype=object)
array(['Esen', 'Ş.', ''], dtype=object)
array(['Halis', 'D.', ''], dtype=object)
array(['İlhan', 'T. B.', ''], dtype=object)
array(['Kılıçgedik', 'A.', ''], dtype=object)
array(['Oğur', 'S.', ''], dtype=object)
array(['Öz', 'S.', ''], dtype=object)
array(['Özbey', 'A.', ''], dtype=object)
array(['Özcan', 'V. E.', ''], dtype=object)
array(['Ünel', 'N. G.', ''], dtype=object)]
|
1,124 |
2305.13356
|
Shayan Majidy
|
Shayan Majidy, Utkarsh Agrawal, Sarang Gopalakrishnan, Andrew C.
Potter, Romain Vasseur, Nicole Yunger Halpern
|
Critical phase and spin sharpening in SU(2)-symmetric monitored quantum
circuits
|
8 pages (6 figures) + appendices (11.5 pages). V2 contains numerics
to identify the purification time in the spin-fuzzy phase (See Fig. 6)
| null | null | null |
quant-ph cond-mat.dis-nn cond-mat.stat-mech
|
http://creativecommons.org/licenses/by/4.0/
|
Monitored quantum circuits exhibit entanglement transitions at certain
measurement rates. Such a transition separates phases characterized by how much
information an observer can learn from the measurement outcomes. We study
SU(2)-symmetric monitored quantum circuits, using exact numerics and a mapping
onto an effective statistical-mechanics model. Due to the symmetry's
non-Abelian nature, measuring qubit pairs allows for nontrivial entanglement
scaling even in the measurement-only limit. We find a transition between a
volume-law entangled phase and a critical phase whose diffusive purification
dynamics emerge from the non-Abelian symmetry. Additionally, we numerically
identify a "spin-sharpening transition." On one side is a phase in which the
measurements can efficiently identify the system's total spin quantum number;
on the other side is a phase in which measurements cannot.
|
[{'version': 'v1', 'created': 'Mon, 22 May 2023 18:00:01 GMT'}
{'version': 'v2', 'created': 'Sat, 17 Jun 2023 15:30:17 GMT'}]
|
2023-06-21
|
[array(['Majidy', 'Shayan', ''], dtype=object)
array(['Agrawal', 'Utkarsh', ''], dtype=object)
array(['Gopalakrishnan', 'Sarang', ''], dtype=object)
array(['Potter', 'Andrew C.', ''], dtype=object)
array(['Vasseur', 'Romain', ''], dtype=object)
array(['Halpern', 'Nicole Yunger', ''], dtype=object)]
|
1,125 |
2106.11803
|
Tadahiro Oh
|
Tadahiro Oh, Yuzhao Wang, and Younes Zine
|
Three-dimensional stochastic cubic nonlinear wave equation with almost
space-time white noise
|
55 pages. Expanded Remark 1.10. Published in Stoch. Partial Differ.
Equ. Anal. Comput. (2022). Special issue dedicated to Professor Istv\'an
Gy\"ongy on the occasion of his seventieth birthday
| null |
10.1007/s40072-022-00237-x
| null |
math.AP math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the stochastic cubic nonlinear wave equation (SNLW) with an additive
noise on the three-dimensional torus $\mathbb{T}^3$. In particular, we prove
local well-posedness of the (renormalized) SNLW when the noise is almost a
space-time white noise. In recent years, the paracontrolled calculus has played
a crucial role in the well-posedness study of singular SNLW on $\mathbb{T}^3$
by Gubinelli, Koch, and the first author (2018), Okamoto, Tolomeo, and the
first author (2020), and Bringmann (2020). Our approach, however, does not rely
on the paracontrolled calculus. We instead proceed with the second order
expansion and study the resulting equation for the residual term, using
multilinear dispersive smoothing.
|
[{'version': 'v1', 'created': 'Tue, 22 Jun 2021 14:17:51 GMT'}
{'version': 'v2', 'created': 'Sat, 28 May 2022 17:57:36 GMT'}]
|
2022-05-31
|
[array(['Oh', 'Tadahiro', ''], dtype=object)
array(['Wang', 'Yuzhao', ''], dtype=object)
array(['Zine', 'Younes', ''], dtype=object)]
|
1,126 |
1807.01668
|
Alexander Khajetoorians
|
Brian Kiraly, Alexander N. Rudenko, Werner M.J. van Weerdenburg,
Daniel Wegner, Mikhail I. Katsnelson, Alexander A. Khajetoorians
|
An orbitally derived single-atom magnetic memory
| null |
Nature Communicationsvolume 9, Article number: 3904 (2018)
|
10.1038/s41467-018-06337-4
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A single magnetic atom on a surface epitomizes the scaling limit for magnetic
information storage. Indeed, recent work has shown that individual atomic spins
can exhibit magnetic remanence and be read out with spin-based methods,
demonstrating the fundamental requirements for magnetic memory. However, atomic
spin memory has been only realized on thin insulating surfaces to date,
removing potential tunability via electronic gating or distance-dependent
exchange-driven magnetic coupling. Here, we show a novel mechanism for
single-atom magnetic information storage based on bistability in the orbital
population, or so-called valency, of an individual Co atom on semiconducting
black phosphorus (BP). Distance-dependent screening from the BP surface
stabilizes the two distinct valencies and enables us to electronically
manipulate the relative orbital population, total magnetic moment and spatial
charge density of an individual magnetic atom without a spin-dependent readout
mechanism. Furthermore, we show that the strongly anisotropic wavefunction can
be used to locally tailor the switching dynamics between the two valencies.
This orbital memory derives stability from the energetic barrier to atomic
relaxation and demonstrates the potential for high-temperature single-atom
information storage.
|
[{'version': 'v1', 'created': 'Wed, 4 Jul 2018 16:36:53 GMT'}]
|
2018-12-19
|
[array(['Kiraly', 'Brian', ''], dtype=object)
array(['Rudenko', 'Alexander N.', ''], dtype=object)
array(['van Weerdenburg', 'Werner M. J.', ''], dtype=object)
array(['Wegner', 'Daniel', ''], dtype=object)
array(['Katsnelson', 'Mikhail I.', ''], dtype=object)
array(['Khajetoorians', 'Alexander A.', ''], dtype=object)]
|
1,127 |
math/0404162
|
Daniel Ruberman
|
Daniel Ruberman, Nikolai Saveliev
|
Rohlin's invariant and gauge theory III. Homology 4--tori
|
Published by Geometry and Topology at
http://www.maths.warwick.ac.uk/gt/GTVol9/paper47.abs.html
|
Geom. Topol. 9 (2005) 2079-2127
|
10.2140/gt.2005.9.2079
| null |
math.GT
| null |
This is the third in our series of papers relating gauge theoretic invariants
of certain 4-manifolds with invariants of 3-manifolds derived from Rohlin's
theorem. Such relations are well-known in dimension three, starting with
Casson's integral lift of the Rohlin invariant of a homology sphere. We
consider two invariants of a spin 4-manifold that has the integral homology of
a 4-torus. The first is a degree zero Donaldson invariant, counting flat
connections on a certain SO(3)-bundle. The second, which depends on the choice
of a 1-dimensional cohomology class, is a combination of Rohlin invariants of a
3-manifold carrying the dual homology class. We prove that these invariants,
suitably normalized, agree modulo 2, by showing that they coincide with the
quadruple cup product of 1-dimensional cohomology classes.
|
[{'version': 'v1', 'created': 'Wed, 7 Apr 2004 12:18:28 GMT'}
{'version': 'v2', 'created': 'Tue, 2 Aug 2005 02:23:39 GMT'}
{'version': 'v3', 'created': 'Fri, 28 Oct 2005 11:34:57 GMT'}]
|
2014-11-11
|
[array(['Ruberman', 'Daniel', ''], dtype=object)
array(['Saveliev', 'Nikolai', ''], dtype=object)]
|
1,128 |
2007.05128
|
Stefan Felder
|
Rui Li, Kristen D. Splinter and Stefan Felder
|
Aligning free surface properties in time-varying hydraulic jumps
| null | null | null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Hydraulic jumps occur commonly in natural channels and energy dissipation
systems of hydraulic structures in the violent transition from supercritical to
subcritical flows. They are characterised by large flow aeration, high
turbulence and strong fluctuations of the free surface and the jump toe. For
free surface measurements, fast-sampling, fixed-point instruments such as
acoustic displacement meters (ADMs) and wire gauges (WGs) are commonly used,
while LIDAR technology is a relatively new method for recording instantaneous
free surface motions of aerated flows. While each of these instruments has been
shown previously to provide reasonable results for basic and advanced free
surface properties, differences between instruments and experiments remain
unexplained. To systematically analyse these differences, simultaneous
laboratory experiments of aerated hydraulic jumps were conducted. Good
agreement between the three instruments was obtained for basic free surface
properties including elevations, fluctuations, skewness, kurtosis, and
frequencies, as well as advanced free surface properties such as integral time
and length scales. These new results indicate that any of these instruments can
be used for the recording of free surface properties albeit the integration
limit for free surface scales must be considered. A key finding of this
research was that differences between repeated experiments as well as previous
studies were observed when using the visual jump toe for alignment. However,
this bias could be resolved by using the mean jump toe location recorded with
the LIDAR. Therefore, future studies should simultaneously measure the
instantaneous jump toe to provide more consistent results across studies.
|
[{'version': 'v1', 'created': 'Fri, 10 Jul 2020 01:04:38 GMT'}
{'version': 'v2', 'created': 'Sun, 20 Dec 2020 08:07:07 GMT'}]
|
2020-12-22
|
[array(['Li', 'Rui', ''], dtype=object)
array(['Splinter', 'Kristen D.', ''], dtype=object)
array(['Felder', 'Stefan', ''], dtype=object)]
|
1,129 |
1804.01941
|
Grigorios Fournodavlos
|
Grigorios Fournodavlos, Jan Sbierski
|
Generic blow-up results for the wave equation in the interior of a
Schwarzschild black hole
|
Minor improvements, version accepted for publication
| null |
10.1007/s00205-019-01434-0
| null |
gr-qc math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the behaviour of smooth solutions to the wave equation,
$\square_g\psi=0$, in the interior of a fixed Schwarzschild black hole. In
particular, we obtain a full asymptotic expansion for all solutions towards
$r=0$ and show that it is characterised by its first two leading terms, the
principal logarithmic term and a bounded second order term. Moreover, we
characterise an open set of initial data for which the corresponding solutions
blow up logarithmically on the entirety of the singular hypersurface $\{r=0\}$.
Our method is based on deriving weighted energy estimates in physical space and
requires no symmetries of solutions. However, a key ingredient in our argument
uses a precise analysis of the spherically symmetric part of the solution and a
monotonicity property of spherically symmetric solutions in the interior.
|
[{'version': 'v1', 'created': 'Thu, 5 Apr 2018 16:31:03 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Jul 2019 14:33:41 GMT'}]
|
2019-09-04
|
[array(['Fournodavlos', 'Grigorios', ''], dtype=object)
array(['Sbierski', 'Jan', ''], dtype=object)]
|
1,130 |
astro-ph/9605107
|
Karl Mannheim
|
K. Mannheim, S. Westerhoff, H. Meyer, & H.-H. Fink
|
Beacons at the Gamma Ray Horizon
|
9 pages latex, postscript figures included; A&A
|
Astron.Astrophys.315:77-85,1996
| null | null |
astro-ph
| null |
Blazars with redshifts z<0.1 are likely candidates for detection at energies
in the range 300 GeV - 50 TeV with Cerenkov telescopes and scintillator arrays.
We present gamma-ray flux predictions for a sample of 15 nearby flat-spectrum
radio sources fitting the proton blazar model of Mannheim (1993a) to their
observed broad-band spectral energy distributions. At high energies, we use
fluxes or flux limits measured by ROSAT, CGRO and the Whipple Observatory to
constrain their spectra. We take into account absorption of the gamma-rays by
pair production with low energy photons of the diffuse infrared-to-optical
photon background produced by galaxies (cosmic absorption) and with low energy
synchrotron photons of the blazar radiation field (internal absorption).
Typically, the theoretical spectra decrease much faster above TeV (photon index
s~3) than between GeV and TeV (s~2) owing to internal absorption. The predicted
fluxes are confronted with flux limits in the 20-50 TeV energy range obtained
by the High Energy Gamma Ray Astronomy (HEGRA) experiment. Without cosmic
absorption, the fluxes are about equal to the current sensitivity of HEGRA.
Improved gamma/hadron separation techniques could render a detection by HEGRA
possible, if cosmic absorption by the far-infrared background at wavelengths
~100 mu is not exceedingly strong.
|
[{'version': 'v1', 'created': 'Fri, 17 May 1996 12:58:29 GMT'}]
|
2011-05-23
|
[array(['Mannheim', 'K.', ''], dtype=object)
array(['Westerhoff', 'S.', ''], dtype=object)
array(['Meyer', 'H.', ''], dtype=object)
array(['Fink', 'H. -H.', ''], dtype=object)]
|
1,131 |
2304.05689
|
Paul Glendinning
|
Paul Glendinning
|
Heterodimensional cycles and noninvertible blenders in piecewise smooth
two dimensional maps
|
23 pages, 5 figures, research paper
| null | null | null |
math.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Heterodimensional cycles are heteroclinic cycles that connect periodic orbits
whose unstable manifolds have different dimensions. This is a source of
nonhyperbolic dynamics and unstable dimension variability. For smooth
invertible maps persistence of heterodimensional cycles with changing
parameters is established using blenders, and this is only possible for systems
of dimension three or higher. Using the idea of a snapback repeller we show
that the definitions and results extend to noninvertible maps and that
blender-type dynamics is possible in two dimensional piecewise smooth
noninvertible maps. These piecewise smooth maps have the additional property of
robust chaos, which simplifies some steps of the argument. The ideas are
illustrated using a class of continuous piecewise smooth maps related to the
border collision normal form.
|
[{'version': 'v1', 'created': 'Wed, 12 Apr 2023 08:26:59 GMT'}]
|
2023-04-13
|
[array(['Glendinning', 'Paul', ''], dtype=object)]
|
1,132 |
2008.07499
|
Jos\'e Eduardo Rosales Quintero Dr.
|
J.E. Rosales-Quintero
|
A pure connection formulation with real fields for Gravity
| null | null |
10.1142/S021827182050114X
| null |
hep-th math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study an $SO(1,3)$ pure connection formulation in four dimensions for
real-valued fields, inspired by the Capovilla, Dell and Jacobson complex
self-dual approach. By considering the CMPR BF action, also, taking into
account a more general class of the Cartan-Killing form for the Lie algebra
$\mathfrak{so(1,3)}$ and by refining the structure of the Lagrange multipliers,
we integrate out the metric variables in order to obtain the pure connection
action. Once we have obtained this action, we impose certain restrictions on
the Lagrange multipliers, in such a way that the equations of motion led us to
a family of torsionless conformally flat Einstein manifolds, parametrized by
two numbers. Finally, we show that, by a suitable choice of parameters, that
self-dual spaces (Anti-) De Sitter can be obtained.
|
[{'version': 'v1', 'created': 'Mon, 17 Aug 2020 17:46:43 GMT'}]
|
2021-02-24
|
[array(['Rosales-Quintero', 'J. E.', ''], dtype=object)]
|
1,133 |
1408.1436
|
Pablo Rafael Mora
|
Pablo Mora
|
Gauge Symmetries and Holographic Anomalies of Chern-Simons and
Transgression AdS Gravity
|
This work and arXiv:1407.6032 started as a rewritting of
arXiv:1010.5110 (which was not published in a journal), therefore there may
may be some ovelap in the review sections
| null |
10.1007/JHEP04(2015)090
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We review the issue of gauge and gravitational anomalies with backgrounds,
maybe offering a new outlook on some aspects of these questions.
We compute the holographic anomalies of hypothetical theories dual, in the
sense of the AdS-CFT correspondence, to Chern-Simons AdS gravities. Those
anomalies are either gauge anomalies associated to the AdS gauge group of the
theory or diffeomorphism anomalies, with each kind related to the other.
As a result of using suitable action principles por Chern-Simons AdS
gravities, coming from Transgression forms, we obtain finite results without
the need for further regularization.
Our results are of potential interest for Lovelock gravity theories, as it
has been shown that the boundary terms dictated by the transgressions for
Chern-Simons gravities are also suitable to regularize Lovelock theories. The
Wess-Zumino consistency condition ensures that anomalies of the generic form
computed here should appear for these and other theories.
|
[{'version': 'v1', 'created': 'Wed, 6 Aug 2014 22:06:38 GMT'}]
|
2015-05-20
|
[array(['Mora', 'Pablo', ''], dtype=object)]
|
1,134 |
1201.1092
|
Laurent Denis
|
Laurent Denis and Anis Matoussi
|
Maximum principle for quasilinear SPDE's on a bounded domain without
regularity assumptions
| null | null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a maximum principle for local solutions of quasi-linear parabolic
stochastic PDEs, with non-homogeneous second order operator on a bounded domain
and driven by a space-time white noise. Our method based on an approximation of
the domain and the coefficients of the operator, does not require regularity
assumptions. As in previous works, the results are consequences of It\^{o}'s
formula and estimates for the positive part of local solutions which are
non-positive on the lateral boundary.
|
[{'version': 'v1', 'created': 'Thu, 5 Jan 2012 09:39:37 GMT'}
{'version': 'v2', 'created': 'Fri, 31 Aug 2012 14:10:33 GMT'}]
|
2012-09-03
|
[array(['Denis', 'Laurent', ''], dtype=object)
array(['Matoussi', 'Anis', ''], dtype=object)]
|
1,135 |
2212.08156
|
Patric Holmvall
|
Patric Holmvall, Annica M. Black-Schaffer
|
Coreless vortices as direct signature of chiral $d$-wave
superconductivity
|
7 pages, 4 figures, Supplemental Material: 11 pages, 12 figures
| null | null | null |
cond-mat.supr-con
|
http://creativecommons.org/licenses/by/4.0/
|
Chiral $d$-wave superconductivity has been proposed in a number of different
materials, but characteristic experimental fingerprints have been largely
lacking. We show that quadruply quantized coreless vortices are prone to form
and offer distinctive signatures of the chiral $d$-wave state in both the local
density of states and the total magnetic moment. Their dissimilarity in
positive versus negative magnetic fields further leads to additional
spontaneous symmetry breaking, producing clear evidence of time-reversal
symmetry breaking, chiral superconductivity, and the Chern number.
|
[{'version': 'v1', 'created': 'Thu, 15 Dec 2022 21:38:15 GMT'}
{'version': 'v2', 'created': 'Mon, 27 Mar 2023 20:02:45 GMT'}
{'version': 'v3', 'created': 'Thu, 1 Jun 2023 23:20:16 GMT'}]
|
2023-06-05
|
[array(['Holmvall', 'Patric', ''], dtype=object)
array(['Black-Schaffer', 'Annica M.', ''], dtype=object)]
|
1,136 |
1012.2053
|
Alexey Feofanov
|
A. Fedorov, P. Macha, A. K. Feofanov, C. J. P. M. Harmans, J. E. Mooij
|
Tuned transition from quantum to classical for macroscopic quantum
states
|
4 pages, 5 figures
|
Phys.Rev.Lett.106:170404,2011
|
10.1103/PhysRevLett.106.170404
| null |
cond-mat.mes-hall cond-mat.supr-con quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The boundary between the classical and quantum worlds has been intensely
studied. It remains fascinating to explore how far the quantum concept can
reach with use of specially fabricated elements. Here we employ a tunable flux
qubit with basis states having persistent currents of 1$ \mu$A carried by a
billion electrons. By tuning the tunnel barrier between these states we see a
cross-over from quantum to classical. Released from non-equilibrium, the system
exhibits spontaneous coherent oscillations. For high barriers the lifetime of
the states increases dramatically while the tunneling period approaches the
phase coherence time and the classical regime is reached.
|
[{'version': 'v1', 'created': 'Thu, 9 Dec 2010 17:13:29 GMT'}
{'version': 'v2', 'created': 'Sat, 25 Dec 2010 11:20:46 GMT'}]
|
2011-07-04
|
[array(['Fedorov', 'A.', ''], dtype=object)
array(['Macha', 'P.', ''], dtype=object)
array(['Feofanov', 'A. K.', ''], dtype=object)
array(['Harmans', 'C. J. P. M.', ''], dtype=object)
array(['Mooij', 'J. E.', ''], dtype=object)]
|
1,137 |
astro-ph/0512208
|
Daisuke Nagai
|
Daisuke Nagai (U.Chicago, KICP)
|
The Impact of Galaxy Formation on the Sunyaev-Zeldovich Effect of Galaxy
Clusters
|
13 pages, 8 figures; accepted for publication in ApJ; revised to
match the published version and added 1 figure
|
Astrophys.J.650:538-549,2006
|
10.1086/506467
| null |
astro-ph
| null |
We study the effects of galaxy formation on the Sunyaev-Zel'dovich effect
(SZE) observable-mass relations using high-resolution cosmological simulations.
The simulations of eleven individual clusters spanning a decade in mass are
performed with the shock-capturing Eulerian adaptive mesh refinement
N-body+gasdynamics ART code. To assess the impact of galaxy formation, we
compare two sets of simulations performed in an adiabatic regime and those with
several physical processes critical to various aspects of galaxy formation:
radiative cooling, star formation, stellar feedback and metal enrichment. We
show that a SZE signal integrated to a sufficiently large fraction of cluster
volume correlates strongly with its enclosed mass, independent of details of
gas physics and dynamical state of the cluster. The slope and redshift
evolution of the SZE flux-mass relation are also insensitive to processes of
galaxy formation and are well characterized by a simple self-similar cluster
model. Its normalization, on the other hand, is significantly affected by gas
cooling and associated star formation. Our simulations show that inclusion of
these processes suppresses the normalization by ~30-40%. The effect is due to a
decrease in gas mass fraction, which is offset slightly by an increase in gas
mass-weighted temperature. Gas cooling and star formation also cause an
increase in total mass and modify the normalization by a few percent. Finally,
the comparison with recent observations of the SZE scaling relations highlights
the importance of galaxy formation in theoretical modelling of clusters and
shows that current generation of simulations produce clusters with gross
properties quite similar to their observed counterparts.
|
[{'version': 'v1', 'created': 'Wed, 7 Dec 2005 22:29:01 GMT'}
{'version': 'v2', 'created': 'Sat, 3 Jun 2006 01:32:11 GMT'}]
|
2008-11-26
|
[array(['Nagai', 'Daisuke', '', 'U.Chicago, KICP'], dtype=object)]
|
1,138 |
2111.13753
|
Vladimir Manuilov
|
Vladimir Manuilov
|
On the inverse semigroup of bimodules over a C*-algebra
|
7 pages
| null |
10.1134/S1061920822010071
| null |
math.OA math.MG
|
http://creativecommons.org/licenses/by/4.0/
|
It was noticed recently that, given a metric space $(X,d_X)$, the equivalence
classes of metrics on the disjoint union of the two copies of $X$ coinciding
with $d_X$ on each copy form an inverse semigroup $M(X)$ with respect to
concatenation of metrics. Now put this inverse semigroup construction in a more
general context, namely, we define, for a C*-algebra $A$, an inverse semigroup
$S(A)$ of Hilbert C*-$A$-$A$-bimodules. When $A$ is the uniform Roe algebra
$C^*_u(X)$ of a metric space $X$, we construct a map $M(X)\to S(C^*_u(X))$ and
show that this map is injective, but not surjective in general. This allows to
define an analog of the inverse semigroup $M(X)$ that does not depend on the
choice of a metric on $X$ within its coarse equivalence class.
|
[{'version': 'v1', 'created': 'Fri, 26 Nov 2021 21:47:47 GMT'}]
|
2022-04-06
|
[array(['Manuilov', 'Vladimir', ''], dtype=object)]
|
1,139 |
hep-ph/9508244
|
Douglas M. Jansen
|
J. C. Peng, D. M. Jansen, Y. C. Chen
|
Probing u-bar/d-bar Asymmetry in the Proton via Quarkonium Production
|
latex file, ps file, 3 figures Uuencoded
|
Phys.Lett. B344 (1995) 1-5
|
10.1016/0370-2693(94)01466-P
| null |
hep-ph
| null |
The sensitivity of proton-induced $J/\psi$ and $\Upsilon$ production to the
possible $\bar u/\bar d$ asymmetry in the nucleon is studied. The ratio of the
quarkonium production cross sections at large $x_F$ on hydrogen over deuterium
targets, $\sigma (p+p) / \sigma (p+d)$, is shown to be sensitive to this
asymmetry. Predictions of various theoretical models for this ratio are
presented.
|
[{'version': 'v1', 'created': 'Sat, 5 Aug 1995 14:11:59 GMT'}
{'version': 'v2', 'created': 'Sun, 6 Aug 1995 09:38:07 GMT'}]
|
2009-10-28
|
[array(['Peng', 'J. C.', ''], dtype=object)
array(['Jansen', 'D. M.', ''], dtype=object)
array(['Chen', 'Y. C.', ''], dtype=object)]
|
1,140 |
plasm-ph/9506001
|
Douglass E. Post
|
R. Clark, J. Abdallah, and D. Post
|
Radiation Rates for Low Z Impurities in Edge Plasmas
|
Preprint for the 11th PSI meeting, gzipped postscript with 11
figures, 14 pages
| null |
10.1016/0022-3115(94)00467-6
| null |
plasm-ph physics.plasm-ph
| null |
The role of impurity radiation in the reduction of heat loads on divertor
plates in present experiments such as DIII-D, JET, JT-60, ASDEX, and Alcator
C-Mod, and in planned experiments such as ITER and TPX places a new degree of
importance on the accuracy of impurity radiation emission rates for electron
temperatures below 250 eV for ITER and below 150 eV for present experiments. We
have calculated the radiated power loss using a collisional radiative model for
Be, B, C, Ne and Ar using a multiple configuration interaction model which
includes density dependent effects, as well as a very detailed treatment of the
energy levels and meta-stable levels. The "collisional radiative" effects are
very important for Be at temperatures below 10 eV. The same effects are present
for higher Z impurities, but not as strongly. For some of the lower Z elements,
the new rates are about a factor of two lower than those from a widely used,
simpler average-ion package (ADPAK) developed for high Z ions and for higher
temperatures. Following the approach of Lengyel for the case where electron
heat conduction is the dominant mechanism for heat transport along field lines,
our analysis indicates that significant enhancements of the radiation losses
above collisional radiative model rates due to such effects as rapid recycling
and charge exchange recombination will be necessary for impurity radiation to
reduce the peak heat loads on divertor plates for high heat flux experiments
such as ITER.
|
[{'version': 'v1', 'created': 'Mon, 19 Jun 1995 19:00:39 GMT'}
{'version': 'v2', 'created': 'Tue, 20 Jun 1995 23:21:58 GMT'}]
|
2009-10-28
|
[array(['Clark', 'R.', ''], dtype=object)
array(['Abdallah', 'J.', ''], dtype=object)
array(['Post', 'D.', ''], dtype=object)]
|
1,141 |
0708.0300
|
Kotaro Yamada
|
Masatoshi Kokubu, Wayne Rossman, Masaaki Umehara, Kotaro Yamada
|
Asymptotic behavior of flat surfaces in hyperbolic 3-space
|
34 pages, 6 figures
|
J. Math. Soc. Japan 61(3), 2009, 799-852
| null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we investigate the asymptotic behavior of regular ends of flat
surfaces in the hyperbolic 3-space H^3. Galvez, Martinez and Milan showed that
when the singular set does not accumulate at an end, the end is asymptotic to a
rotationally symmetric flat surface. As a refinement of their result, we show
that the asymptotic order (called "pitch" p) of the end determines the limiting
shape, even when the singular set does accumulate at the end. If the singular
set is bounded away from the end, we have -1<p<=0. If the singular set
accumulates at the end, the pitch p is a positive rational number not equal to
1. Choosing appropriate positive integers n and m so that p=n/m, suitable
slices of the end by horospheres are asymptotic to d-coverings (d-times wrapped
coverings) of epicycloids or d-coverings of hypocycloids with 2n_0 cusps and
whose normal directions have winding number m_0, where n=n_0d, m=m_0d (n_0, m_0
are integers or half-integers) and d is the greatest common divisor of m-n and
m+n. Furthermore, it is known that the caustics of flat surfaces are also flat.
So, as an application, we give a useful explicit formula for the pitch of ends
of caustics of complete flat fronts.
|
[{'version': 'v1', 'created': 'Thu, 2 Aug 2007 09:07:19 GMT'}
{'version': 'v2', 'created': 'Tue, 29 Jul 2008 22:14:22 GMT'}
{'version': 'v3', 'created': 'Fri, 27 Feb 2009 09:49:27 GMT'}]
|
2009-08-03
|
[array(['Kokubu', 'Masatoshi', ''], dtype=object)
array(['Rossman', 'Wayne', ''], dtype=object)
array(['Umehara', 'Masaaki', ''], dtype=object)
array(['Yamada', 'Kotaro', ''], dtype=object)]
|
1,142 |
1708.06328
|
Kyriakos Papadodimas
|
Kyriakos Papadodimas
|
A class of non-equilibrium states and the black hole interior
|
42 pages + appendices
| null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a class of non-equilibrium pure states, which are generally
present in an isolated quantum statistical system. These are states of the form
$|\Psi\rangle=e^{-{\beta H \over 2}} U e^{{\beta H \over 2}} |\Psi_0\rangle$,
where $U$ is a unitary made out of simple operators and $|\Psi_0\rangle$ is a
typical equilibrium pure state with sharply peaked energy. We argue that in a
system with a holographic dual these states have a natural interpretation as an
AdS black hole with transient excitations behind the horizon. We explore the
interpretation of these states as pure states undergoing a time-dependent
spontaneous fluctuation out of equilibrium. While these states are atypical and
the microscopic phases of the wavefunction are correlated with the matrix
elements of simple operators, the states are partly disguised as equilibrium
states due to cancellations between contributions from different coarse-grained
energy bins. These cancellations are guaranteed by the KMS condition of the
underlying equilibrium state $|\Psi_0\rangle$. However, in correlators which
include the Hamiltonian $H$ these cancellations are spoiled and the
non-equilibrium nature of the state $|\Psi\rangle$ can be detected. We discuss
connections with the proposal that local observables behind the horizon are
realized as state-dependent operators. The states studied in this paper may be
useful for implementing an analogue of the "traversable wormhole" protocol for
a 1-sided black hole, which could potentially allow us to extract the
excitation from behind the horizon. We include some pedagogical background
material.
|
[{'version': 'v1', 'created': 'Mon, 21 Aug 2017 17:21:14 GMT'}]
|
2017-08-22
|
[array(['Papadodimas', 'Kyriakos', ''], dtype=object)]
|
1,143 |
2306.09027
|
Chao Peng
|
Haoran Wang, Yi Zuo, Xuefan Yin, Zihao Chen, Zixuan Zhang, Feifan
Wang, Yuefeng Hu, Xiaoyu Zhang and Chao Peng
|
Ultra-low-loss optical interconnect enabled by topological
unidirectional guided resonance
|
21 pages, 5 figures
| null | null | null |
physics.optics physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Grating couplers that interconnect photonic chips to off-chip components are
of essential importance for various optoelectronics applications. Despite
numerous efforts in past decades, existing grating couplers still suffer from
poor energy efficiency and thus hinder photonic integration toward a larger
scale. Here, we theoretically propose and experimentally demonstrate a method
to achieve ultra-low-loss grating coupler by employing topological
unidirectional guided resonances (UGRs). Leveraging the unidirectional emitting
nature of UGRs, the useless downward radiation is greatly suppressed with no
mirror placed on the bottom. By engineering the dispersion and apodizing the
geometry of grating, we realize a grating coupler on 340 nm
silicon-on-insulator platform with a record-low-loss of 0.34 dB and bandwidth
exceeding 30 nm at the telecom wavelength of 1550 nm. We further show a pair of
grating couplers works as optic via that interconnects two stacked photonic
chips with a loss of only 0.94 dB. Our work sheds light on the feasibility of
energy-efficient optical interconnect for silicon photonics, and paving the way
to large-scale photonic integration for applications from optical communication
to photonic computing.
|
[{'version': 'v1', 'created': 'Thu, 15 Jun 2023 10:37:11 GMT'}]
|
2023-06-16
|
[array(['Wang', 'Haoran', ''], dtype=object)
array(['Zuo', 'Yi', ''], dtype=object)
array(['Yin', 'Xuefan', ''], dtype=object)
array(['Chen', 'Zihao', ''], dtype=object)
array(['Zhang', 'Zixuan', ''], dtype=object)
array(['Wang', 'Feifan', ''], dtype=object)
array(['Hu', 'Yuefeng', ''], dtype=object)
array(['Zhang', 'Xiaoyu', ''], dtype=object)
array(['Peng', 'Chao', ''], dtype=object)]
|
1,144 |
1910.05999
|
Matteo Brachetta
|
Matteo Brachetta and Claudia Ceci
|
A BSDE-based approach for the optimal reinsurance problem under partial
information
|
30 pages, 3 figures
| null | null | null |
q-fin.MF math.OC q-fin.RM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the optimal reinsurance problem under the criterion of
maximizing the expected utility of terminal wealth when the insurance company
has restricted information on the loss process. We propose a risk model with
claim arrival intensity and claim sizes distribution affected by an
unobservable environmental stochastic factor. By filtering techniques (with
marked point process observations), we reduce the original problem to an
equivalent stochastic control problem under full information. Since the
classical Hamilton-Jacobi-Bellman approach does not apply, due to the infinite
dimensionality of the filter, we choose an alternative approach based on
Backward Stochastic Differential Equations (BSDEs). Precisely, we characterize
the value process and the optimal reinsurance strategy in terms of the unique
solution to a BSDE driven by a marked point process.
|
[{'version': 'v1', 'created': 'Mon, 14 Oct 2019 09:12:13 GMT'}
{'version': 'v2', 'created': 'Thu, 14 May 2020 10:02:48 GMT'}]
|
2020-05-15
|
[array(['Brachetta', 'Matteo', ''], dtype=object)
array(['Ceci', 'Claudia', ''], dtype=object)]
|
1,145 |
2102.13439
|
Dmitry Korolev
|
Alena Nikolskaya, Evgenia Okulich, Dmitry Korolev, Anton Stepanov,
Dmitry Nikolichev, Alexey Mikhaylov, David Tetelbaum, Aleksei Almaev, Charles
Airton Bolzan, Ant\^onio Jr Buaczik, Raquel Giulian, Pedro Luis Grande, Ashok
Kumar, Mahesh Kumar, Daniela Gogova
|
Ion implantation in \b{eta}-Ga2O3: physics and technology
| null | null | null | null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Gallium oxide and in particular its thermodynamically stable \b{eta}-Ga2O3
phase is within the most exciting materials in research and technology nowadays
due to its unique properties, such as an ultra-wide band gap and a very high
breakdown electric field, finding a number of applications in electronics and
optoelectronics. Ion implantation is a traditional technological method used in
these fields, and its well-known advantages can contribute greatly to the rapid
development of physics and technology of Ga2O3-based materials and devices.
Here, the current status of ion beam implantation in \b{eta}-Ga2O3 is reviewed.
The main attention is paid to the results of experimental study of damage under
ion irradiation and the properties of Ga2O3 layers doped by ion implantation.
The results of ab initio theoretical calculations of the impurities and defects
parameters are briefly presented, and the physical principles of a number of
analytical methods used to study implanted gallium oxide layers are
highlighted. The use of ion implantation in the development of such Ga2O3-based
devices as metal oxide field effect transistors, Schottky barrier diodes, and
solar-blind UV detectors, is described together with systematical analysis of
the achieved values of their characteristics. Finally, the most important
challenges to be overcome in this field of science and technology are
discussed.
|
[{'version': 'v1', 'created': 'Fri, 26 Feb 2021 12:55:01 GMT'}]
|
2021-03-01
|
[array(['Nikolskaya', 'Alena', ''], dtype=object)
array(['Okulich', 'Evgenia', ''], dtype=object)
array(['Korolev', 'Dmitry', ''], dtype=object)
array(['Stepanov', 'Anton', ''], dtype=object)
array(['Nikolichev', 'Dmitry', ''], dtype=object)
array(['Mikhaylov', 'Alexey', ''], dtype=object)
array(['Tetelbaum', 'David', ''], dtype=object)
array(['Almaev', 'Aleksei', ''], dtype=object)
array(['Bolzan', 'Charles Airton', ''], dtype=object)
array(['Buaczik', 'Antônio Jr', ''], dtype=object)
array(['Giulian', 'Raquel', ''], dtype=object)
array(['Grande', 'Pedro Luis', ''], dtype=object)
array(['Kumar', 'Ashok', ''], dtype=object)
array(['Kumar', 'Mahesh', ''], dtype=object)
array(['Gogova', 'Daniela', ''], dtype=object)]
|
1,146 |
1907.08140
|
Bernhard Ihrig
|
Bernhard Ihrig, Nikolai Zerf, Peter Marquard, Igor F. Herbut, Michael
M. Scherer
|
Abelian Higgs model at four loops, fixed-point collision and deconfined
criticality
|
15 pages, 6 figures, 3 tables
|
Phys. Rev. B 100, 134507 (2019)
|
10.1103/PhysRevB.100.134507
|
HU-EP-19/19, DESY 19-124, SAGEX-19-16
|
cond-mat.str-el hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The abelian Higgs model is the textbook example for the superconducting
transition and the Anderson-Higgs mechanism, and has become pivotal in the
description of deconfined quantum criticality. We study the abelian Higgs model
with $n$ complex scalar fields at unprecedented four-loop order in the
$4-\epsilon$ expansion and find that the annihilation of the critical and
bicritical points occurs at a critical number of $n_c \approx 182.95\left(1 -
1.752\epsilon + 0.798 \epsilon^2 + 0.362\epsilon^3\right) +
\mathcal{O}\left(\epsilon^4\right)\nonumber$. Consequently, below $n_c$, the
transition turns from second to first order. Resummation of the series to
extract the result in three-dimensions provides strong evidence for a critical
$n_c(d=3)$ which is significantly below the leading-order value, but the
estimates for $n_c$ are widely spread. Conjecturing the topology of the
renormalization group flow between two and four dimensions, we obtain a smooth
interpolation function for $n_c(d)$ and find $n_c(3)\approx 12.2\pm 3.9$ as our
best estimate in three dimensions. Finally, we discuss Miransky scaling
occurring below $n_c$ and comment on implications for weakly first-order
behavior of deconfined quantum transitions. We predict an emergent hierarchy of
length scales between deconfined quantum transitions corresponding to different
$n$.
|
[{'version': 'v1', 'created': 'Thu, 18 Jul 2019 16:22:04 GMT'}]
|
2019-10-23
|
[array(['Ihrig', 'Bernhard', ''], dtype=object)
array(['Zerf', 'Nikolai', ''], dtype=object)
array(['Marquard', 'Peter', ''], dtype=object)
array(['Herbut', 'Igor F.', ''], dtype=object)
array(['Scherer', 'Michael M.', ''], dtype=object)]
|
1,147 |
2108.03033
|
Riccardo Zese
|
Elena Bellodi, Marco Gavanelli, Riccardo Zese, Evelina Lamma, Fabrizio
Riguzzi
|
Nonground Abductive Logic Programming with Probabilistic Integrity
Constraints
|
Paper presented at the 37th International Conference on Logic
Programming (ICLP 2021), 16 pages
|
Theory and Practice of Logic Programming, 21(5), 557-574, 2021
|
10.1017/S1471068421000417
| null |
cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Uncertain information is being taken into account in an increasing number of
application fields. In the meantime, abduction has been proved a powerful tool
for handling hypothetical reasoning and incomplete knowledge. Probabilistic
logical models are a suitable framework to handle uncertain information, and in
the last decade many probabilistic logical languages have been proposed, as
well as inference and learning systems for them. In the realm of Abductive
Logic Programming (ALP), a variety of proof procedures have been defined as
well. In this paper, we consider a richer logic language, coping with
probabilistic abduction with variables. In particular, we consider an ALP
program enriched with integrity constraints `a la IFF, possibly annotated with
a probability value. We first present the overall abductive language, and its
semantics according to the Distribution Semantics. We then introduce a proof
procedure, obtained by extending one previously presented, and prove its
soundness and completeness.
|
[{'version': 'v1', 'created': 'Fri, 6 Aug 2021 10:22:12 GMT'}
{'version': 'v2', 'created': 'Thu, 3 Feb 2022 14:22:05 GMT'}]
|
2022-02-04
|
[array(['Bellodi', 'Elena', ''], dtype=object)
array(['Gavanelli', 'Marco', ''], dtype=object)
array(['Zese', 'Riccardo', ''], dtype=object)
array(['Lamma', 'Evelina', ''], dtype=object)
array(['Riguzzi', 'Fabrizio', ''], dtype=object)]
|
1,148 |
astro-ph/9606020
| null |
R.J. Lavery (Iowa State), P. Seitzer (Michigan), N.B. Suntzeff, A.R.
Walker (NOAO/CTIO), G.S. Da Costa (MSSSO)
|
Distant Ring Galaxies as Evidence for a Steeply Increasing Galaxy
Interaction Rate with Redshift
|
Postscript file, 13 Pages, 1 fig. available upon request, accepted in
ApJ Letters (date not set)
| null |
10.1086/310194
| null |
astro-ph
| null |
Hubble Space Telescope WFPC2 images of the Local Group dwarf galaxy Tucana
reveal an unbiased sample of distant field galaxies. While a large number of
these galaxies can be classified according to standard Hubble types, a
significant number of these galaxies can be identified as "ring" galaxies, a
morphology likely induced through galaxy collisions. We have identified seven
ring galaxy candidates in our fields. Assuming these galaxies lie between the
redshifts of 0.1 and 1 and that there has been no evolution in the galaxy
interaction rate, then the probability of finding a single ring galaxy in our
field of view is less than 1%. Alternatively, if the galaxy interaction rate
increases as (1 + z)**4.5, which represents a high-end estimate of the
dependence of the galaxy merger rate on redshift, the probability increases to
~10%. Thus, these observations provide support for a galaxy interaction rate
that increases steeply at moderate redshift. We also suggest several additional
factors that may play an important role in producing the relatively large
number of ring galaxies we have detected.
|
[{'version': 'v1', 'created': 'Tue, 4 Jun 1996 21:01:38 GMT'}]
|
2009-10-28
|
[array(['Lavery', 'R. J.', '', 'Iowa State'], dtype=object)
array(['Seitzer', 'P.', '', 'Michigan'], dtype=object)
array(['Suntzeff', 'N. B.', '', 'NOAO/CTIO'], dtype=object)
array(['Walker', 'A. R.', '', 'NOAO/CTIO'], dtype=object)
array(['Da Costa', 'G. S.', '', 'MSSSO'], dtype=object)]
|
1,149 |
astro-ph/0410394
|
Michael L. Brown
|
M. L. Brown, P. G. Castro, A. N. Taylor (IfA, University of Edinburgh)
|
CMB temperature and polarisation pseudo-Cl estimators and covariances
|
19 pages, 12 figures, accepted for MNRAS, minor revision
|
Mon.Not.Roy.Astron.Soc. 360 (2005) 1262-1280
|
10.1111/j.1365-2966.2005.09111.x
| null |
astro-ph
| null |
We develop the pseudo-Cl method for reconstructing the Cosmic Microwave
Background (CMB) temperature and polarization auto- and cross-power spectra,
and estimate the pseudo-Cl covariance matrix for a realistic experiment on the
cut sky. We calculate the full coupling equations for all six possible CMB
power spectra, relating the observed pseudo-Cl's to the underlying all-sky
Cl's, and test the reconstruction on both full-sky and cut-sky simulated CMB
data sets. In particular we consider the reconstruction of the Cl from upcoming
ground-based polarization experiments covering areas of a few hundred sq.
degrees and find that the method is fast, unbiased and performs well over a
wide range of multipoles from l=2 to l=2500. We then calculate the full
covariance matrix between the modes of the pseudo-temperature and polarization
power spectra, assuming that the underlying CMB fields are Gaussian randomly
distributed. The complexity of the covariance matrix prohibits its rapid
calculation, required for parameter estimation. Hence we present an
approximation for the covariance matrix in terms of convolutions of the
underlying power spectra. The coupling matrices in these expressions can be
estimated by fitting to numerical simulations, circumventing direct and slow
calculation, and further, inaccurate analytic approximations. We show that
these coupling matrices are mostly independent of cosmology, and that the full
covariance matrix for all six pseudo-Cl power spectra can be quickly and
accurately calculated for any given cosmological model using this method. We
compare these semi-analytic covariance matrices against simulations and find
good agreement, the accuracy of which depends mainly on survey area and the
range of cosmological parameters considered.
|
[{'version': 'v1', 'created': 'Sun, 17 Oct 2004 14:42:10 GMT'}
{'version': 'v2', 'created': 'Wed, 13 Apr 2005 16:41:13 GMT'}]
|
2009-11-10
|
[array(['Brown', 'M. L.', '', 'IfA, University of Edinburgh'], dtype=object)
array(['Castro', 'P. G.', '', 'IfA, University of Edinburgh'],
dtype=object)
array(['Taylor', 'A. N.', '', 'IfA, University of Edinburgh'],
dtype=object) ]
|
1,150 |
2107.09577
|
Thanh Tung Vu
|
Tung T. Vu, Hien Quoc Ngo, Thomas L. Marzetta, Michail Matthaiou
|
How Does Cell-Free Massive MIMO Support Multiple Federated Learning
Groups?
|
Accepted to appear in Proc. IEEE International Workshop on Signal
Processing Advances in Wireless Communications (SPAWC) in Lucca, Italy, Sep.
2021
| null | null | null |
cs.IT cs.LG math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Federated learning (FL) has been considered as a promising learning framework
for future machine learning systems due to its privacy preservation and
communication efficiency. In beyond-5G/6G systems, it is likely to have
multiple FL groups with different learning purposes. This scenario leads to a
question: How does a wireless network support multiple FL groups? As an answer,
we first propose to use a cell-free massive multiple-input multiple-output
(MIMO) network to guarantee the stable operation of multiple FL processes by
letting the iterations of these FL processes be executed together within a
large-scale coherence time. We then develop a novel scheme that asynchronously
executes the iterations of FL processes under multicasting downlink and
conventional uplink transmission protocols. Finally, we propose a
simple/low-complexity resource allocation algorithm which optimally chooses the
power and computation resources to minimize the execution time of each
iteration of each FL process.
|
[{'version': 'v1', 'created': 'Tue, 20 Jul 2021 15:46:53 GMT'}]
|
2021-07-21
|
[array(['Vu', 'Tung T.', ''], dtype=object)
array(['Ngo', 'Hien Quoc', ''], dtype=object)
array(['Marzetta', 'Thomas L.', ''], dtype=object)
array(['Matthaiou', 'Michail', ''], dtype=object)]
|
1,151 |
0712.2456
|
Mukund Rangamani
|
Sayantani Bhattacharyya, Veronika E Hubeny, Shiraz Minwalla, Mukund
Rangamani
|
Nonlinear Fluid Dynamics from Gravity
|
46 pages, latex. v2: added refs and new section discussing second
order hydrodynamics. v3: typos corrected. v4: typos corrected
|
JHEP 0802:045,2008
|
10.1088/1126-6708/2008/02/045
| null |
hep-th gr-qc nucl-th
| null |
Black branes in AdS5 appear in a four parameter family labeled by their
velocity and temperature. Promoting these parameters to Goldstone modes or
collective coordinate fields -- arbitrary functions of the coordinates on the
boundary of AdS5 -- we use Einstein's equations together with regularity
requirements and boundary conditions to determine their dynamics. The resultant
equations turn out to be those of boundary fluid dynamics, with specific values
for fluid parameters. Our analysis is perturbative in the boundary derivative
expansion but is valid for arbitrary amplitudes. Our work may be regarded as a
derivation of the nonlinear equations of boundary fluid dynamics from gravity.
As a concrete application we find an explicit expression for the expansion of
this fluid stress tensor including terms up to second order in the derivative
expansion.
|
[{'version': 'v1', 'created': 'Fri, 14 Dec 2007 21:01:02 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Jan 2008 10:33:34 GMT'}
{'version': 'v3', 'created': 'Mon, 4 Feb 2008 11:02:40 GMT'}
{'version': 'v4', 'created': 'Wed, 2 Apr 2008 17:04:59 GMT'}]
|
2009-07-09
|
[array(['Bhattacharyya', 'Sayantani', ''], dtype=object)
array(['Hubeny', 'Veronika E', ''], dtype=object)
array(['Minwalla', 'Shiraz', ''], dtype=object)
array(['Rangamani', 'Mukund', ''], dtype=object)]
|
1,152 |
1806.09358
|
David Cubero
|
David Cubero and Ferruccio Renzoni
|
Asymptotic theory of quasiperiodically driven quantum systems
| null |
Physical Review E, 97, 062139 (2018)
|
10.1103/PhysRevE.97.062139
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The theoretical treatment of quasi-periodically driven quantum systems is
complicated by the inapplicability of the Floquet theorem, which requires
strict periodicity. In this work we consider a quantum system driven by a
bi-harmonic driving and examine its asymptotic long-time limit, the limit in
which features distinguishing systems with periodic and quasi-periodic driving
occur. Also, in the classical case this limit is known to exhibit universal
scaling, independent of the system details, with the system's reponse under
quasi-periodic driving being described in terms of nearby periodically driven
system results. We introduce a theoretical framework appropriate for the
treatment of the quasi-periodically driven quantum system in the long-time
limit, and derive an expression, based on Floquet states for a periodically
driven system approximating the different steps of the time evolution, for the
asymptotic scaling of relevant quantities for the system at hand. These
expressions are tested numerically, finding excellent agreement for the
finite-time average velocity in a prototypical quantum ratchet consisting of a
space-symmetric potential and a time-asymmetric oscillating force.
|
[{'version': 'v1', 'created': 'Mon, 25 Jun 2018 10:13:13 GMT'}]
|
2018-06-26
|
[array(['Cubero', 'David', ''], dtype=object)
array(['Renzoni', 'Ferruccio', ''], dtype=object)]
|
1,153 |
1906.01682
|
Sergey Pershoguba
|
Sergey S. Pershoguba, Thomas Veness and Leonid I. Glazman
|
Landauer Formula for a Superconducting Quantum Point Contact
|
v2: 5+6 pages, 2+1 figures; Corresponds to published version
|
Phys. Rev. Lett. 123, 067001 (2019)
|
10.1103/PhysRevLett.123.067001
| null |
cond-mat.supr-con cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We generalize the Landauer formula to describe the dissipative electron
transport through a superconducting point contact. The finite-temperature,
linear-in-bias, dissipative DC conductance is expressed in terms of the phase-
and energy-dependent scattering matrix of the Bogoliubov quasiparticles in the
quantum point contact. The derived formula is also applicable to hybrid
superconducting-normal structures and normal contacts, where it agrees with the
known limits of Andreev reflection and normal-state conductance, respectively.
|
[{'version': 'v1', 'created': 'Tue, 4 Jun 2019 18:58:44 GMT'}
{'version': 'v2', 'created': 'Tue, 13 Aug 2019 14:58:45 GMT'}]
|
2019-08-14
|
[array(['Pershoguba', 'Sergey S.', ''], dtype=object)
array(['Veness', 'Thomas', ''], dtype=object)
array(['Glazman', 'Leonid I.', ''], dtype=object)]
|
1,154 |
2106.09646
|
Saulo Luis Lima Da Silva
|
Saulo L. L. Silva and Moises Rojas
|
Impurity-induced increase in the thermal quantum correlations and
teleportation in an Ising-XXZ diamond chain
| null | null | null | null |
quant-ph cs.IT math.IT
|
http://creativecommons.org/publicdomain/zero/1.0/
|
In this work we analyze the quantum correlations in a spin-1/2 Ising-XXZ
diamond chain with one plaquette distorted impurity. We have shown that the
introduction of impurity into the chain can significantly increase entanglement
as well as quantum correlations compared to the original model, without
impurity. Due to the great flexibility in the choice of impurity parameters,
the model presented is very general and this fact can be very useful for future
experimental measurements. In addition to entanglement and quantum coherence,
we studied quantum teleportation through a quantum channel composed by a
coupled of Heisenberg dimers with distorted impurity in an Ising-XXZ diamond
chain, as well as fidelity in teleportation. Our analysis shows that the
appropriate choice of parameters can greatly increase all the measures
analyzed. For comparison purposes, we present all our results together with the
results of the measurements made for the original model, without impurity,
studied in previous works.
|
[{'version': 'v1', 'created': 'Thu, 17 Jun 2021 16:45:33 GMT'}]
|
2021-06-18
|
[array(['Silva', 'Saulo L. L.', ''], dtype=object)
array(['Rojas', 'Moises', ''], dtype=object)]
|
1,155 |
gr-qc/9512006
|
Hans-Juergen Schmidt
|
Hans - Juergen Schmidt
|
How to measure spatial distances?
|
4 pages, latex, no figures
|
Gen.Rel.Grav. 28 (1996) 899-903
|
10.1007/BF02104755
|
Potsdam/Math 95/10
|
gr-qc
| null |
The use of time--like geodesics to measure temporal distances is better
justified than the use of space--like geodesics for a measurement of spatial
distances. We give examples where a ''spatial distance'' cannot be
appropriately determined by the length of a space--like geodesic.
|
[{'version': 'v1', 'created': 'Wed, 29 Nov 1995 17:17:28 GMT'}]
|
2009-10-28
|
[array(['Schmidt', 'Hans - Juergen', ''], dtype=object)]
|
1,156 |
1207.5540
|
Jacob Haqq-Misra
|
Jacob Haqq-Misra, Michael Busch, Sanjoy Som, Seth Baum
|
The Benefits and Harms of Transmitting Into Space
|
Published in Space Policy
|
Space Policy (2013) 29:40-48
|
10.1016/j.spacepol.2012.11.006
| null |
physics.pop-ph physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deliberate and unintentional radio transmissions from Earth propagate into
space. These transmissions could be detected by extraterrestrial watchers over
interstellar distances. Here, we analyze the harms and benefits of deliberate
and unintentional transmissions relevant to Earth and humanity. Comparing the
magnitude of deliberate radio broadcasts intended for messaging to
extraterrestrial intelligence (METI) with the background radio spectrum of
Earth, we find that METI attempts to date have much lower detectability than
emissions from current radio communication technologies on Earth. METI
broadcasts are usually transient and several orders of magnitude less powerful
than other terrestrial sources such as astronomical and military radars, which
provide the strongest detectable signals. The benefits of radio communication
on Earth likely outweigh the potential harms of detection by extraterrestrial
watchers; however, the uncertainty regarding the outcome of contact with
extraterrestrial beings creates difficulty in assessing whether or not to
engage in long-term and large-scale METI.
|
[{'version': 'v1', 'created': 'Mon, 23 Jul 2012 21:22:09 GMT'}
{'version': 'v2', 'created': 'Fri, 15 Mar 2013 23:18:14 GMT'}]
|
2013-03-19
|
[array(['Haqq-Misra', 'Jacob', ''], dtype=object)
array(['Busch', 'Michael', ''], dtype=object)
array(['Som', 'Sanjoy', ''], dtype=object)
array(['Baum', 'Seth', ''], dtype=object)]
|
1,157 |
hep-lat/9803021
|
Bruno Taglienti
|
L. Giusti(1,2), M. L. Paciello(3), S. Petrarca(3,4), B. Taglienti(3),
M. Testa (3,4,5) ((1) Scuola Normale Superiore Pisa Italy, (2) INFN Sezione
di Pisa Italy, (3) INFN, Sezione di Roma 1 Italy, (4) Dipartimento di Fisica
Universita' di Roma "La Sapienza" Italy, (5) CERN Geneva Switzerland)
|
On the Definition of Gauge Field Operators in Lattice Gauge-Fixed
Theories
|
8 pages, LaTeX2e/LaTeX209, 3 eps figures
|
Phys.Lett. B432 (1998) 196-202
|
10.1016/S0370-2693(98)00631-5
|
ROME prep. 1200/98, SNS/PH/1998-004
|
hep-lat
| null |
We address the problem of defining the gauge four-potential on the lattice,
in terms of the natural link variables. Different regularized definitions are
shown, through non perturbative numerical computation, to converge towards the
same continuum renormalized limit.
|
[{'version': 'v1', 'created': 'Thu, 26 Mar 1998 09:26:55 GMT'}]
|
2009-10-31
|
[array(['Giusti', 'L.', ''], dtype=object)
array(['Paciello', 'M. L.', ''], dtype=object)
array(['Petrarca', 'S.', ''], dtype=object)
array(['Taglienti', 'B.', ''], dtype=object)
array(['Testa', 'M.', ''], dtype=object)]
|
1,158 |
1909.06325
|
Nikolay Perminov Sergeevich
|
Nikolay Sergeevich Perminov, Diana Yurevna Tarankova, and Sergey
Andreevich Moiseev
|
Programmable quantum motherboard for logical qubits
| null | null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a scheme of a programmable quantum motherboard based on the system
of three interacting high-Q resonators coupled with two-level atoms. By using
the algebraic methods, we found that the investigated atomic-resonator platform
can possess an equidistant spectrum of the eigenfrequencies at which simple
reversible dynamics of the single photon excitation becomes possible. It was
shown that such multiresonator quantum motherboard scheme allows to achieve
efficient and programmable quantum state transfer between distributed atoms and
generate logical qubits and qutrits. The use of the studied circuit in quantum
processing is proposed.
|
[{'version': 'v1', 'created': 'Fri, 13 Sep 2019 16:49:52 GMT'}]
|
2019-09-16
|
[array(['Perminov', 'Nikolay Sergeevich', ''], dtype=object)
array(['Tarankova', 'Diana Yurevna', ''], dtype=object)
array(['Moiseev', 'Sergey Andreevich', ''], dtype=object)]
|
1,159 |
2202.11763
|
Bahattin Can Maral
|
Bahattin Can Maral
|
Single Image Super-Resolution Methods: A Survey
|
7 pages, 5 figures
| null | null | null |
eess.IV cs.CV cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
Super-resolution (SR), the process of obtaining high-resolution images from
one or more low-resolution observations of the same scene, has been a very
popular topic of research in the last few decades in both signal processing and
image processing areas. Due to the recent developments in Convolutional Neural
Networks, the popularity of SR algorithms has skyrocketed as the barrier of
entry has been lowered significantly. Recently, this popularity has spread into
video processing areas to the lengths of developing SR models that work in
real-time. In this paper, we compare different SR models that specialize in
single image processing and will take a glance at how they evolved to take on
many different objectives and shapes over the years.
|
[{'version': 'v1', 'created': 'Thu, 17 Feb 2022 12:01:05 GMT'}]
|
2022-02-25
|
[array(['Maral', 'Bahattin Can', ''], dtype=object)]
|
1,160 |
1401.4557
|
Colin Sheppard
|
Colin J. R. Sheppard, Shan Shan Kou and Jiao Lin
|
The Green-function transform and wave propagation
| null | null | null | null |
physics.optics physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Fourier methods well known in signal processing are applied to
three-dimensional wave propagation problems. The Fourier transform of the Green
function, when written explicitly in terms of a real-valued spatial frequency,
consists of homogeneous and inhomogeneous components. Both parts are necessary
to result in a pure out-going wave that satisfies causality. The homogeneous
component consists only of propagating waves, but the inhomogeneous component
contains both evanescent and propagating terms. Thus we make a distinction
between inhomogenous waves and evanescent waves. The evanescent component is
completely contained in the region of the inhomogeneous component outside the
k-space sphere. Further, propagating waves in the Weyl expansion contain both
homogeneous and inhomogeneous components. The connection between the Whittaker
and Weyl expansions is discussed. A list of relevant spherically symmetric
Fourier transforms is given.
|
[{'version': 'v1', 'created': 'Sat, 18 Jan 2014 16:04:13 GMT'}]
|
2014-01-21
|
[array(['Sheppard', 'Colin J. R.', ''], dtype=object)
array(['Kou', 'Shan Shan', ''], dtype=object)
array(['Lin', 'Jiao', ''], dtype=object)]
|
1,161 |
2007.08549
|
Robert De Rosa
|
Robert J. De Rosa, Rebekah Dawson, Eric L. Nielsen
|
A significant mutual inclination between the planets within the $\pi$
Mensae system
|
24 pages, 10 figures, 7 tables. Accepted for publication in Astronomy
& Astrophysics
|
A&A 640, A73 (2020)
|
10.1051/0004-6361/202038496
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Measuring the geometry of multi-planet extrasolar systems can provide insight
into their dynamical history and the processes of planetary formation. Such
measurements are challenging for systems detected through indirect techniques
such as radial velocity and transit, having only been measured for a handful of
systems to-date. We aimed to place constraints on the orbital geometry of the
outer planet in the $\pi$ Mensae system, a G0V star at 18.3 pc host to a
wide-orbit super-jovian ($M\sin i = 10.02\pm0.15$ $M_{\rm Jup}$) with a
5.7-year period and an inner transiting super-earth ($M=4.82\pm0.85$
$M_\oplus$) with a 6.3-d period. We combined astrometric measurements from the
Hipparcos and Gaia satellites with a precisely determined spectroscopic orbit
in an attempt to constrain the inclination of the orbital plane of the outer
planet. We measured an inclination of $i_b=49.9_{-4.5}^{+5.3}$ deg for the
orbital plane of $\pi$ Mensae b, leading to a direct measurement of its mass of
$13.01_{-0.95}^{+1.03}$ $M_{\rm Jup}$. We found a significant mutual
inclination between the orbital planes of the two planets; a 95% credible
interval for $i_{\rm mut}$ of between $34.5^\circ$ and $140.6^\circ$ after
accounting for the unknown position angle of the orbit of $\pi$ Mensae c,
strongly excluding a co-planar scenario for the two planets within this system.
All orbits are stable in the present-day configuration, and secular
oscillations of planet c's eccentricity are quenched by general relativistic
precession. Planet c may have undergone high eccentricity tidal migration
triggered by Kozai-Lidov cycles, but dynamical histories involving disk
migration or in situ formation are not ruled out. Nonetheless, this system
provides the first direct evidence that giant planets with large mutual
inclinations have a role to play in the origins and evolution of some
super-Earth systems.
|
[{'version': 'v1', 'created': 'Thu, 16 Jul 2020 18:14:28 GMT'}]
|
2020-08-19
|
[array(['De Rosa', 'Robert J.', ''], dtype=object)
array(['Dawson', 'Rebekah', ''], dtype=object)
array(['Nielsen', 'Eric L.', ''], dtype=object)]
|
1,162 |
2102.04246
|
Yu. M. Poluektov
|
Yu.M. Poluektov
|
Debye model for the surface phonons
|
10 pages
| null |
10.1063/10.0004236
| null |
cond-mat.stat-mech cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
A quantum description of the surface waves in an isotropic elastic body
without the use of the semiclassical quantization is proposed. The problem
about the surface waves is formulated in the Lagrangian and Hamiltonian
representations. Within the framework of the generalized Debye model, the
contribution of the surface phonons (rayleighons) to thermodynamic functions is
calculated. It is emphasized that the role of the surface phonons can be
significant and even decisive in low-dimensional systems, granular and porous
media, and that their contribution to the total heat capacity increases with
decreasing temperature.
|
[{'version': 'v1', 'created': 'Fri, 5 Feb 2021 14:02:06 GMT'}]
|
2021-06-16
|
[array(['Poluektov', 'Yu. M.', ''], dtype=object)]
|
1,163 |
1102.1844
|
Matteo Smerlak
|
Matteo Smerlak
|
Comment on `Lost in Translation: Topological Singularities in Group
Field Theory'
| null |
Class.Quant.Grav.28:178001,2011
|
10.1088/0264-9381/28/17/178001
| null |
hep-th math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Gurau argued in [arXiv:1006.0714] that the gluing spaces arising as Feynman
diagrams of three-dimensional group field theory are not all pseudo-manifolds.
I dispute this conclusion: albeit not properly triangulated, these spaces are
genuine pseudo-manifolds, viz. their singular locus is of codimension at least
two.
|
[{'version': 'v1', 'created': 'Wed, 9 Feb 2011 11:50:02 GMT'}
{'version': 'v2', 'created': 'Thu, 10 Feb 2011 12:40:38 GMT'}]
|
2011-08-19
|
[array(['Smerlak', 'Matteo', ''], dtype=object)]
|
1,164 |
1910.02201
|
Jun Miura
|
Motoki Kojima and Jun Miura
|
Early Estimation of User's Intention of Tele-Operation Using Object
Affordance and Hand Motion in a Dual First-Person Vision
| null | null | null | null |
cs.CV cs.HC cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper describes a method of estimating the intention of a user's motion
in a robot tele-operation scenario. One of the issues in tele-operation is
latency, which occurs due to various reasons such as a slow robot motion and a
narrow communication channel. An effective way of reducing the latency is to
estimate the human intention of motions and to move the robot proactively. To
enable a reliable early intention estimation, we use both hand motion and
object affordances in a dual first-person vision (robot and user) with an HMD.
Experimental results in an object pickup scenario show the effectiveness of the
method.
|
[{'version': 'v1', 'created': 'Sat, 5 Oct 2019 03:21:54 GMT'}]
|
2019-10-08
|
[array(['Kojima', 'Motoki', ''], dtype=object)
array(['Miura', 'Jun', ''], dtype=object)]
|
1,165 |
cs/0205062
|
Michael Frumkin
|
Michael Frumkin, Rob F. Van der Wijngaart
|
Minimizing Cache Misses in Scientific Computing Using Isoperimetric
Bodies
|
27 pages, 10 figures
| null | null | null |
cs.PF
| null |
A number of known techniques for improving cache performance in scientific
computations involve the reordering of the iteration space. Some of these
reorderings can be considered coverings of the iteration space with sets having
small surface-to-volume ratios. Use of such sets may reduce the number of cache
misses in computations of local operators having the iteration space as their
domain. First, we derive lower bounds on cache misses that any algorithm must
suffer while computing a local operator on a grid. Then, we explore coverings
of iteration spaces of structured and unstructured discretization grid
operators which allow us to approach these lower bounds. For structured grids
we introduce a covering by successive minima tiles based on the interference
lattice of the grid. We show that the covering has a small surface-to-volume
ratio and present a computer experiment showing actual reduction of the cache
misses achieved by using these tiles. For planar unstructured grids we show
existence of a covering which reduces the number of cache misses to the level
of that of structured grids. Next, we introduce a class of multidimensional
grids, called starry grids in this paper. These grids represent an abstraction
of unstructured grids used in, for example, molecular simulations and the
solution of partial differential equations. We show that starry grids can be
covered by sets having a low surface-to-volume ratio and, hence have the same
cache efficiency as structured grids. Finally, we present a triangulation of a
three-dimensional cube that has the property that any local operator on the
corresponding grid must incur a significantly larger number of cache misses
than a similar operator on a structured grid of the same size.
|
[{'version': 'v1', 'created': 'Fri, 24 May 2002 00:56:47 GMT'}]
|
2009-09-29
|
[array(['Frumkin', 'Michael', ''], dtype=object)
array(['Van der Wijngaart', 'Rob F.', ''], dtype=object)]
|
1,166 |
cond-mat/0302364
|
Slava Yukalov
|
E.P. Yukalova and V. I. Yukalov
|
Numerical Modelling of Transport Processes in Semiconductors
|
7 pages, Latex, no figures
|
J. Comput. Methods Sci. Eng. 2 (2002) 287-291
| null | null |
cond-mat
| null |
The peculiarities of electric current in semiconductors with nonuniform
distribution of charge carriers are studied. The semiclassical drift-diffusion
equations consisting of the continuity equations and the Poisson equation are
solved numerically using Rusanov finite-difference scheme of third order. The
different types of boundary conditions are numerically investigated. It is
shown that the stability of the Rusanov scheme for the problem considered is
achieved with the Neumann type boundary conditions. These conditions correspond
to the absence of diffusion through semiconductor surface. Special set of
parameters is found under which a very interesting and unusual transient effect
of negative current in nonuniform semiconductors appears. Different regimes of
negative current are considered for realistic semiconductor materials.
|
[{'version': 'v1', 'created': 'Tue, 18 Feb 2003 11:44:57 GMT'}]
|
2007-05-23
|
[array(['Yukalova', 'E. P.', ''], dtype=object)
array(['Yukalov', 'V. I.', ''], dtype=object)]
|
1,167 |
quant-ph/0505179
|
Chang-Kui Duan
|
Chang-Kui Duan, Yungui Gong, Hui-Ning Dong and Michael F. Reid
|
Simplified diagrammatic expansion for effective operator
|
5 journal pages, 4 figures
|
J. Chem. Phys., Vol. 121, No. 11, 5071-5076 (15 September 2004)
|
10.1063/1.1782071
| null |
quant-ph
| null |
For a quantum many-body problem, effective Hamiltonians that give exact
eigenvalues in reduced model space usually have different expressions, diagrams
and evaluation rules from effective transition operators that give exact
transition matrix elements between effective eigenvectors in reduced model
space. By modifying these diagrams slightly and considering the linked diagrams
for all the terms of the same order, we find that the evaluation rules can be
made the same for both effective Hamiltonian and effective transition operator
diagrams, and in many cases it is possible to combine many diagrams into one
modified diagram. We give the rules to evaluate these modified diagrams and
show their validity.
|
[{'version': 'v1', 'created': 'Tue, 24 May 2005 08:41:01 GMT'}]
|
2007-05-23
|
[array(['Duan', 'Chang-Kui', ''], dtype=object)
array(['Gong', 'Yungui', ''], dtype=object)
array(['Dong', 'Hui-Ning', ''], dtype=object)
array(['Reid', 'Michael F.', ''], dtype=object)]
|
1,168 |
hep-th/9406157
|
Shahn Majid
|
Shahn Majid
|
q-Epsilon tensor for quantum and braided spaces
|
24 pages, substantative revision - decided to include material on
Hodge * operator previously omitted. Added a figure
|
J.Math.Phys. 36 (1995) 1991-2007
|
10.1063/1.531098
| null |
hep-th math.QA
| null |
The machinery of braided geometry introduced previously is used now to
construct the $\epsilon$ `totally antisymmetric tensor' on a general braided
vector space determined by R-matrices. This includes natural $q$-Euclidean and
$q$-Minkowski spaces. The formalism is completely covariant under the
corresponding quantum group such as $\widetilde{SO_q(4)}$ or
$\widetilde{SO_q(1,3)}$. The Hodge $*$ operator and differentials are also
constructed in this approach.
|
[{'version': 'v1', 'created': 'Thu, 23 Jun 1994 14:57:50 GMT'}
{'version': 'v2', 'created': 'Tue, 19 Jul 1994 14:11:40 GMT'}]
|
2009-10-28
|
[array(['Majid', 'Shahn', ''], dtype=object)]
|
1,169 |
0708.1612
|
Yu Feng Zhou
|
Cheng-Wei Chiang and Yu-Feng Zhou
|
Flavor SU(3) analysis of charmless B->PP decays
|
3 pages, 2 figs. Talk given at EPS-HEP07 To appear in the
proceedings, Reference added
|
J.Phys.Conf.Ser.110:052056,2008
|
10.1088/1742-6596/110/5/052056
| null |
hep-ph
| null |
We perform a global fits to charmless $B \to PP$ decays which independently
constrain the $(\bar\rho,\bar\eta)$ vertex of the unitarity triangle. The
fitted amplitudes and phase are used to predict the branching ratios and CP
asymmetries of all decay modes, including those of the $B_s$ system. Different
schemes of SU(3) breaking in decay amplitude sizes are analyzed. The
possibility of having a new physics contribution to $K \pi$ decays is also
discussed.
|
[{'version': 'v1', 'created': 'Sun, 12 Aug 2007 14:02:05 GMT'}
{'version': 'v2', 'created': 'Tue, 21 Aug 2007 10:24:17 GMT'}]
|
2008-11-26
|
[array(['Chiang', 'Cheng-Wei', ''], dtype=object)
array(['Zhou', 'Yu-Feng', ''], dtype=object)]
|
1,170 |
hep-ph/0505041
|
Stefano Pozzorini
|
S. Pozzorini and E. Remiddi
|
Precise numerical evaluation of the two loop sunrise graph Master
Integrals in the equal mass case
|
11 pages, LaTeX. The complete paper is also available via the www at
http://www-ttp.physik.uni-karlsruhe.de/Preprints/ and the program can be
downloaded from http://www-ttp.physik.uni-karlsruhe.de/Progdata/
|
Comput.Phys.Commun. 175 (2006) 381-387
|
10.1016/j.cpc.2006.05.005
|
TTP05-06, SFB/CPP-05-14
|
hep-ph
| null |
We present a double precision routine in Fortran for the precise and fast
numerical evaluation of the two Master Integrals (MIs) of the equal mass
two-loop sunrise graph for arbitrary momentum transfer in d=2 and d=4
dimensions. The routine implements the accelerated power series expansions
obtained by solving the corresponding differential equations for the MIs at
their singular points. With a maximum of 22 terms for the worst case expansion
a relative precision of better than a part in 10^{15} is achieved for arbitrary
real values of the momentum transfer.
|
[{'version': 'v1', 'created': 'Fri, 6 May 2005 08:12:54 GMT'}]
|
2009-11-11
|
[array(['Pozzorini', 'S.', ''], dtype=object)
array(['Remiddi', 'E.', ''], dtype=object)]
|
1,171 |
nlin/0701033
|
J\'er\'emie Bec
|
Jeremie Bec and Raphael Chetrite
|
Toward a phenomenological approach to the clustering of heavy particles
in turbulent flows
|
16 pages, 8 figures
| null |
10.1088/1367-2630/9/3/077
| null |
nlin.CD
| null |
A simple model accounting for the ejection of heavy particles from the
vortical structures of a turbulent flow is introduced. This model involves a
space and time discretization of the dynamics and depends on only two
parameters: the fraction of space-time occupied by rotating structures of the
carrier flow and the rate at which particles are ejected from them. The latter
can be heuristically related to the response time of the particles and hence
measure their inertia. It is shown that such a model reproduces qualitatively
most aspects of the spatial distribution of heavy particles transported by
realistic flows. In particular the probability density function of the mass $m$
in a cell displays an power-law behavior at small values and decreases faster
than exponentially at large values. The dependence of the exponent of the first
tail upon the parameters of the dynamics is explicitly derived for the model.
The right tail is shown to decrease as $\exp (-C m \log m)$. Finally, the
distribution of mass averaged over several cells is shown to obey rescaling
properties as a function of the coarse-grain size and of the ejection rate of
the particles. Contrarily to what has been observed in direct numerical
simulations of turbulent flows (Bec et al., http://arxiv.org/nlin.CD/0608045),
such rescaling properties are only due in the model to the mass dynamics of the
particles and do not involve any scaling properties in the spatial structure of
the carrier flow.
|
[{'version': 'v1', 'created': 'Wed, 17 Jan 2007 09:14:52 GMT'}]
|
2009-11-13
|
[array(['Bec', 'Jeremie', ''], dtype=object)
array(['Chetrite', 'Raphael', ''], dtype=object)]
|
1,172 |
0707.3399
|
Jos\'e Gaite
|
Jose Gaite, Angel Sanz-Andr\'es and Isabel P\'erez-Grande
|
Nonlinear analysis of a simple model of temperature evolution in a
satellite
|
13 pages, 4 figures (5 EPS files)
|
Nonlinear Dynamics 58 (2009) 405 - 415
|
10.1007/s11071-009-9488-x
| null |
physics.space-ph math-ph math.MP nlin.CD
| null |
We analyse a simple model of the heat transfer to and from a small satellite
orbiting round a solar system planet. Our approach considers the satellite
isothermal, with external heat input from the environment and from internal
energy dissipation, and output to the environment as black-body radiation. The
resulting nonlinear ordinary differential equation for the satellite's
temperature is analysed by qualitative, perturbation and numerical methods,
which show that the temperature approaches a periodic pattern (attracting limit
cycle). This approach can occur in two ways, according to the values of the
parameters: (i) a slow decay towards the limit cycle over a time longer than
the period, or (ii) a fast decay towards the limit cycle over a time shorter
than the period. In the first case, an exactly soluble average equation is
valid. We discuss the consequences of our model for the thermal stability of
satellites.
|
[{'version': 'v1', 'created': 'Mon, 23 Jul 2007 15:37:37 GMT'}]
|
2009-09-25
|
[array(['Gaite', 'Jose', ''], dtype=object)
array(['Sanz-Andrés', 'Angel', ''], dtype=object)
array(['Pérez-Grande', 'Isabel', ''], dtype=object)]
|
1,173 |
2111.05897
|
Binhang Yuan
|
Xiangru Lian, Binhang Yuan, Xuefeng Zhu, Yulong Wang, Yongjun He,
Honghuan Wu, Lei Sun, Haodong Lyu, Chengjun Liu, Xing Dong, Yiqiao Liao,
Mingnan Luo, Congfei Zhang, Jingru Xie, Haonan Li, Lei Chen, Renjie Huang,
Jianying Lin, Chengchun Shu, Xuezhong Qiu, Zhishan Liu, Dongying Kong, Lei
Yuan, Hai Yu, Sen Yang, Ce Zhang, Ji Liu
|
Persia: An Open, Hybrid System Scaling Deep Learning-based Recommenders
up to 100 Trillion Parameters
| null | null | null | null |
cs.LG cs.DC
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Deep learning based models have dominated the current landscape of production
recommender systems. Furthermore, recent years have witnessed an exponential
growth of the model scale--from Google's 2016 model with 1 billion parameters
to the latest Facebook's model with 12 trillion parameters. Significant quality
boost has come with each jump of the model capacity, which makes us believe the
era of 100 trillion parameters is around the corner. However, the training of
such models is challenging even within industrial scale data centers. This
difficulty is inherited from the staggering heterogeneity of the training
computation--the model's embedding layer could include more than 99.99% of the
total model size, which is extremely memory-intensive; while the rest neural
network is increasingly computation-intensive. To support the training of such
huge models, an efficient distributed training system is in urgent need. In
this paper, we resolve this challenge by careful co-design of both the
optimization algorithm and the distributed system architecture. Specifically,
in order to ensure both the training efficiency and the training accuracy, we
design a novel hybrid training algorithm, where the embedding layer and the
dense neural network are handled by different synchronization mechanisms; then
we build a system called Persia (short for parallel recommendation training
system with hybrid acceleration) to support this hybrid training algorithm.
Both theoretical demonstration and empirical study up to 100 trillion
parameters have conducted to justified the system design and implementation of
Persia. We make Persia publicly available (at
https://github.com/PersiaML/Persia) so that anyone would be able to easily
train a recommender model at the scale of 100 trillion parameters.
|
[{'version': 'v1', 'created': 'Wed, 10 Nov 2021 19:40:25 GMT'}
{'version': 'v2', 'created': 'Mon, 15 Nov 2021 09:57:07 GMT'}
{'version': 'v3', 'created': 'Tue, 23 Nov 2021 09:59:49 GMT'}]
|
2021-11-24
|
[array(['Lian', 'Xiangru', ''], dtype=object)
array(['Yuan', 'Binhang', ''], dtype=object)
array(['Zhu', 'Xuefeng', ''], dtype=object)
array(['Wang', 'Yulong', ''], dtype=object)
array(['He', 'Yongjun', ''], dtype=object)
array(['Wu', 'Honghuan', ''], dtype=object)
array(['Sun', 'Lei', ''], dtype=object)
array(['Lyu', 'Haodong', ''], dtype=object)
array(['Liu', 'Chengjun', ''], dtype=object)
array(['Dong', 'Xing', ''], dtype=object)
array(['Liao', 'Yiqiao', ''], dtype=object)
array(['Luo', 'Mingnan', ''], dtype=object)
array(['Zhang', 'Congfei', ''], dtype=object)
array(['Xie', 'Jingru', ''], dtype=object)
array(['Li', 'Haonan', ''], dtype=object)
array(['Chen', 'Lei', ''], dtype=object)
array(['Huang', 'Renjie', ''], dtype=object)
array(['Lin', 'Jianying', ''], dtype=object)
array(['Shu', 'Chengchun', ''], dtype=object)
array(['Qiu', 'Xuezhong', ''], dtype=object)
array(['Liu', 'Zhishan', ''], dtype=object)
array(['Kong', 'Dongying', ''], dtype=object)
array(['Yuan', 'Lei', ''], dtype=object)
array(['Yu', 'Hai', ''], dtype=object)
array(['Yang', 'Sen', ''], dtype=object)
array(['Zhang', 'Ce', ''], dtype=object)
array(['Liu', 'Ji', ''], dtype=object)]
|
1,174 |
1502.03762
|
Maxim Raginsky
|
Ehsan Shafieepoorfard, Maxim Raginsky, and Sean P. Meyn
|
Rationally inattentive control of Markov processes
|
30 pages, 2 figures; accepted to SIAM Journal on Control and
Optimization
| null | null | null |
math.OC cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The article poses a general model for optimal control subject to information
constraints, motivated in part by recent work of Sims and others on
information-constrained decision-making by economic agents. In the average-cost
optimal control framework, the general model introduced in this paper reduces
to a variant of the linear-programming representation of the average-cost
optimal control problem, subject to an additional mutual information constraint
on the randomized stationary policy. The resulting optimization problem is
convex and admits a decomposition based on the Bellman error, which is the
object of study in approximate dynamic programming. The theory is illustrated
through the example of information-constrained linear-quadratic-Gaussian (LQG)
control problem. Some results on the infinite-horizon discounted-cost criterion
are also presented.
|
[{'version': 'v1', 'created': 'Thu, 12 Feb 2015 18:19:38 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Aug 2015 20:29:30 GMT'}
{'version': 'v3', 'created': 'Tue, 23 Feb 2016 05:52:20 GMT'}]
|
2016-02-24
|
[array(['Shafieepoorfard', 'Ehsan', ''], dtype=object)
array(['Raginsky', 'Maxim', ''], dtype=object)
array(['Meyn', 'Sean P.', ''], dtype=object)]
|
1,175 |
2205.02234
|
Ryan Plestid
|
R. Andrew Gustafson, Ryan Plestid, Ian M. Shoemaker
|
Neutrino Portals, Terrestrial Upscattering, and Atmospheric Neutrinos
|
12 pages + 4 pages appendices, 10 figures
| null |
10.1103/PhysRevD.106.095037
|
FERMILAB-PUB-22-250-V
|
hep-ph astro-ph.HE hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the upscattering of atmospheric neutrinos in the interior of the
Earth producing heavy neutral leptons (HNLs) which subsequently decay inside
large volume detectors (e.g. Super-Kamiokande or DUNE). We compute the flux of
upscattered HNLs arriving at a detector, and the resultant event rate of
visible decay products. Using Super-Kamiokande's atmospheric neutrino dataset
we find new leading constraints for dipole couplings to any flavor with HNL
masses between roughly 10 MeV and 100 MeV. For mass mixing with tau neutrinos,
we probe new parameter space near HNL masses of $\sim 20$ MeV with prospects
for substantial future improvements. We also discuss prospects at future
experiments such as DUNE, JUNO, and Hyper-Kamiokande.
|
[{'version': 'v1', 'created': 'Wed, 4 May 2022 18:00:00 GMT'}]
|
2022-12-14
|
[array(['Gustafson', 'R. Andrew', ''], dtype=object)
array(['Plestid', 'Ryan', ''], dtype=object)
array(['Shoemaker', 'Ian M.', ''], dtype=object)]
|
1,176 |
2004.09167
|
Akshay Smit
|
Akshay Smit, Saahil Jain, Pranav Rajpurkar, Anuj Pareek, Andrew Y. Ng,
Matthew P. Lungren
|
CheXbert: Combining Automatic Labelers and Expert Annotations for
Accurate Radiology Report Labeling Using BERT
|
Accepted to EMNLP 2020
| null | null | null |
cs.CL cs.IR cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The extraction of labels from radiology text reports enables large-scale
training of medical imaging models. Existing approaches to report labeling
typically rely either on sophisticated feature engineering based on medical
domain knowledge or manual annotations by experts. In this work, we introduce a
BERT-based approach to medical image report labeling that exploits both the
scale of available rule-based systems and the quality of expert annotations. We
demonstrate superior performance of a biomedically pretrained BERT model first
trained on annotations of a rule-based labeler and then finetuned on a small
set of expert annotations augmented with automated backtranslation. We find
that our final model, CheXbert, is able to outperform the previous best
rules-based labeler with statistical significance, setting a new SOTA for
report labeling on one of the largest datasets of chest x-rays.
|
[{'version': 'v1', 'created': 'Mon, 20 Apr 2020 09:46:40 GMT'}
{'version': 'v2', 'created': 'Thu, 30 Apr 2020 05:32:06 GMT'}
{'version': 'v3', 'created': 'Sun, 18 Oct 2020 20:30:22 GMT'}]
|
2020-10-20
|
[array(['Smit', 'Akshay', ''], dtype=object)
array(['Jain', 'Saahil', ''], dtype=object)
array(['Rajpurkar', 'Pranav', ''], dtype=object)
array(['Pareek', 'Anuj', ''], dtype=object)
array(['Ng', 'Andrew Y.', ''], dtype=object)
array(['Lungren', 'Matthew P.', ''], dtype=object)]
|
1,177 |
astro-ph/0505589
|
Wen Zhao
|
Yang Zhang, Wen Zhao, Yefei Yuan, Tianyang Xia
|
Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe
|
7 pages, 4 figures, minor typos corrected
|
Chin.Phys.Lett.20:1817,2005
|
10.1088/0256-307X/22/7/071
| null |
astro-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The accelerating expansion of the Universe at the present stage is a process
that will change the spectrum of relic gravitational waves. Here we present a
numerical calculation for the power spectrum of relic gravitational waves in
the accelerating Universe. The results show that although the overall features
of the power spectrum is similar to that in the non-accelerating models, the
amplitude is smaller by an order of $10^{-1}$. We also find that the spectrum
is very sensitive to the index $\beta$ of the inflationary expansion with the
scale factor $a(\tau) \propto |\tau|^{1+\beta}$. With increase of $\beta$, the
resulting spectrum is tilted to be flatter with more power on high frequencies,
and the sensitivity of the second science run of the LIGO detectors puts a
restriction on the parameter $\beta < -1.8$. The influence of reheating
following the inflation has been examined.
|
[{'version': 'v1', 'created': 'Mon, 30 May 2005 05:03:33 GMT'}
{'version': 'v2', 'created': 'Thu, 18 Aug 2005 03:36:49 GMT'}
{'version': 'v3', 'created': 'Fri, 21 May 2010 22:50:53 GMT'}]
|
2010-05-27
|
[array(['Zhang', 'Yang', ''], dtype=object)
array(['Zhao', 'Wen', ''], dtype=object)
array(['Yuan', 'Yefei', ''], dtype=object)
array(['Xia', 'Tianyang', ''], dtype=object)]
|
1,178 |
2104.14320
|
Pongpisit Thanasutives
|
Pongpisit Thanasutives, Masayuki Numao, Ken-ichi Fukui
|
Adversarial Multi-task Learning Enhanced Physics-informed Neural
Networks for Solving Partial Differential Equations
|
Accepted by the International Joint Conference on Neural Networks
(IJCNN) 2021, Oral presentation
| null |
10.1109/IJCNN52387.2021.9533606
| null |
cs.LG cs.NA math.NA
|
http://creativecommons.org/licenses/by/4.0/
|
Recently, researchers have utilized neural networks to accurately solve
partial differential equations (PDEs), enabling the mesh-free method for
scientific computation. Unfortunately, the network performance drops when
encountering a high nonlinearity domain. To improve the generalizability, we
introduce the novel approach of employing multi-task learning techniques, the
uncertainty-weighting loss and the gradients surgery, in the context of
learning PDE solutions. The multi-task scheme exploits the benefits of learning
shared representations, controlled by cross-stitch modules, between multiple
related PDEs, which are obtainable by varying the PDE parameterization
coefficients, to generalize better on the original PDE. Encouraging the network
pay closer attention to the high nonlinearity domain regions that are more
challenging to learn, we also propose adversarial training for generating
supplementary high-loss samples, similarly distributed to the original training
distribution. In the experiments, our proposed methods are found to be
effective and reduce the error on the unseen data points as compared to the
previous approaches in various PDE examples, including high-dimensional
stochastic PDEs.
|
[{'version': 'v1', 'created': 'Thu, 29 Apr 2021 13:17:46 GMT'}
{'version': 'v2', 'created': 'Wed, 12 May 2021 08:05:24 GMT'}]
|
2021-09-29
|
[array(['Thanasutives', 'Pongpisit', ''], dtype=object)
array(['Numao', 'Masayuki', ''], dtype=object)
array(['Fukui', 'Ken-ichi', ''], dtype=object)]
|
1,179 |
2003.01265
|
Mario Eduardo Villanueva
|
Mario E. Villanueva, Colin Jones, and Boris Houska
|
Towards Global Optimal Control via Koopman Lifts
|
16 pages, 1 figure, Submitted to a refereed journal
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper introduces a framework for solving time-autonomous nonlinear
infinite horizon optimal control problems, under the assumption that all
minimizers satisfy Pontryagin's necessary optimality conditions. In detail, we
use methods from the field of symplectic geometry to analyze the eigenvalues of
a Koopman operator that lifts Pontryagin's differential equation into a
suitably defined infinite dimensional symplectic space. This has the advantage
that methods from the field of spectral analysis can be used to characterize
globally optimal control laws. A numerical method for constructing optimal
feedback laws for nonlinear systems is then obtained by computing the
eigenvalues and eigenvectors of a matrix that is obtained by projecting the
Pontryagin-Koopman operator onto a finite dimensional space. We illustrate the
effectiveness of this approach by computing accurate approximations of the
optimal nonlinear feedback law for a Van der Pol control system, which cannot
be stabilized by a linear control law.
|
[{'version': 'v1', 'created': 'Tue, 3 Mar 2020 00:35:20 GMT'}]
|
2020-03-04
|
[array(['Villanueva', 'Mario E.', ''], dtype=object)
array(['Jones', 'Colin', ''], dtype=object)
array(['Houska', 'Boris', ''], dtype=object)]
|
1,180 |
2107.11961
|
Yoshihiko Abe
|
Yoshihiko Abe, Tetsutaro Higaki, Tatsuo Kobayashi, Shintaro Takada,
Rei Takahashi
|
4D effective action from non-Abelian DBI action with magnetic flux
background
|
26 pages, version to appear in PRD
| null |
10.1103/PhysRevD.104.126020
|
KUNS-2882, EPHOU-21-007
|
hep-th hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We study a systematic derivation of four dimensional $\mathcal{N}=1$
supersymmetric effective theory from ten dimensional non-Abelian
Dirac-Born-Infeld action compactified on a six dimensional torus with magnetic
fluxes on the D-branes. We find a new type of matter K\"{a}hler metric while
gauge kinetic function and superpotential are consistent with previous studies.
For the ten dimensional action, we use a symmetrized trace prescription and
focus on the bosonic part up to $\mathcal{O}(F^4)$. In the presence of the
supersymmetry, four dimensional chiral fermions can be obtained via index
theorem. The new matter K\"{a}hler metric is independent of flavor but depends
on the fluxes, 4D dilaton, K\"{a}hler moduli and complex structure moduli, and
will be always positive definite if an induced Ramond-Ramond charge of the
D-branes on which matters are living are positive. We read the superpotential
from an F-term scalar quartic interaction derived from the ten dimensional
action and the contribution of the new matter K\"{a}hler metric to the scalar
potential which we derive turns out to be consistent with the supergravity
formulation.
|
[{'version': 'v1', 'created': 'Mon, 26 Jul 2021 05:15:01 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Dec 2021 02:30:28 GMT'}]
|
2022-01-05
|
[array(['Abe', 'Yoshihiko', ''], dtype=object)
array(['Higaki', 'Tetsutaro', ''], dtype=object)
array(['Kobayashi', 'Tatsuo', ''], dtype=object)
array(['Takada', 'Shintaro', ''], dtype=object)
array(['Takahashi', 'Rei', ''], dtype=object)]
|
1,181 |
0902.4196
|
Maksim Tomchenko
|
Maksim Tomchenko
|
Calculation of the one-particle and two-particle condensates in He-II at
T=0
|
12 pages, 5 figures
| null | null | null |
cond-mat.other
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze the microstructure of He-II in the framework of the method of
collective variables (CV), which was proposed by Bogolyubov and Zubarev and was
developed later by Yukhnovskii and Vakarchuk. The logarithm of the ground-state
wave function of He-II, ln(Psi_0), is calculated in the approximation of "two
sums", i.e., as a Jastrow function and first (three-particle) correction. In
the CV method equations for Psi_0 are deduced from the N-particle Schro'dinger
equation. We also take into account the connection between the structure factor
and Psi_0, which allows one to obtain Psi_0 from the structure factor of He-II,
not from a model potential of interaction between He-II atoms. It should be
emphasized that the model does not have any free parameters or functions. The
amount of one-particle (N_1) and two-particle (N_2) condensates is calculated
for the ground state of He-II: we find N_1=0.27N and N_2=0.53N in the Jastrow
approximation for Psi_0, and, taking into account the three-particle correction
to ln(Psi_0), we obtain N_1=0.06N (which agrees with the experiment) and
$N_2=0.16N. In the approximation of "two sums", we also find that the higher
s-particle condensates (s>2) are absent in He-II at T=0.
|
[{'version': 'v1', 'created': 'Tue, 24 Feb 2009 17:12:28 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Feb 2009 10:20:31 GMT'}]
|
2009-02-25
|
[array(['Tomchenko', 'Maksim', ''], dtype=object)]
|
1,182 |
1907.08610
|
Michael Zhang
|
Michael R. Zhang, James Lucas, Geoffrey Hinton, Jimmy Ba
|
Lookahead Optimizer: k steps forward, 1 step back
|
Accepted to Neural Information Processing Systems 2019. Code
available at: https://github.com/michaelrzhang/lookahead
| null | null | null |
cs.LG cs.NE stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The vast majority of successful deep neural networks are trained using
variants of stochastic gradient descent (SGD) algorithms. Recent attempts to
improve SGD can be broadly categorized into two approaches: (1) adaptive
learning rate schemes, such as AdaGrad and Adam, and (2) accelerated schemes,
such as heavy-ball and Nesterov momentum. In this paper, we propose a new
optimization algorithm, Lookahead, that is orthogonal to these previous
approaches and iteratively updates two sets of weights. Intuitively, the
algorithm chooses a search direction by looking ahead at the sequence of fast
weights generated by another optimizer. We show that Lookahead improves the
learning stability and lowers the variance of its inner optimizer with
negligible computation and memory cost. We empirically demonstrate Lookahead
can significantly improve the performance of SGD and Adam, even with their
default hyperparameter settings on ImageNet, CIFAR-10/100, neural machine
translation, and Penn Treebank.
|
[{'version': 'v1', 'created': 'Fri, 19 Jul 2019 17:59:50 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Dec 2019 15:55:38 GMT'}]
|
2019-12-04
|
[array(['Zhang', 'Michael R.', ''], dtype=object)
array(['Lucas', 'James', ''], dtype=object)
array(['Hinton', 'Geoffrey', ''], dtype=object)
array(['Ba', 'Jimmy', ''], dtype=object)]
|
1,183 |
cond-mat/0508642
|
Jesper Fevre Bertelsen
|
Jesper Fevre Bertelsen and Klaus Molmer
|
Molecule Formation in Optical Lattice Wells by Resonantly Modulated
Magnetic Fields
|
5 pages, 6 figures
|
Phys. Rev. A 73 013811 (2006)
|
10.1103/PhysRevA.73.013811
| null |
cond-mat.other
| null |
We present a theoretical model for formation of molecules in an optical
lattice well where a resonant coupling of atomic and molecular states is
provided by small oscillations of a magnetic field in the vicinity of a
Feshbach resonance. As opposed to an adiabatic sweep over the full resonance,
this provides a coherent coupling with a frequency that can be tuned to meet
resonance conditions in the system. The effective Rabi frequencies for this
coupling are calculated and simulations show perfect Rabi oscillations. Robust
production of molecules with an adiabatic sweep of the modulation frequency is
demonstrated. For very large oscillation amplitudes, the Rabi oscillations are
distorted but still effective and fast association is possible.
|
[{'version': 'v1', 'created': 'Fri, 26 Aug 2005 15:54:08 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Nov 2005 16:46:42 GMT'}]
|
2007-05-23
|
[array(['Bertelsen', 'Jesper Fevre', ''], dtype=object)
array(['Molmer', 'Klaus', ''], dtype=object)]
|
1,184 |
1708.05856
|
Rafa{\l} Meller
|
Rafa{\l} Meller
|
Tail and moment estimates for a class of random chaoses of order two
| null | null |
10.4064/sm170819-2-5
| null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We derive two-sided bounds for moments and tails of random quadratic forms
(random chaoses of order $2$), generated by independent symmetric random
variables such that $\lVert X \rVert_{2p} \leq \alpha \lVert X \rVert_p$ for
any $p\geq 1$ and some $\alpha\geq 1$. Estimates are deterministic and exact up
to some multiplicative constants which depend only on $\alpha$.
|
[{'version': 'v1', 'created': 'Sat, 19 Aug 2017 14:41:55 GMT'}
{'version': 'v2', 'created': 'Thu, 7 Jun 2018 05:22:04 GMT'}]
|
2021-01-14
|
[array(['Meller', 'Rafał', ''], dtype=object)]
|
1,185 |
1402.5459
|
Yoritaka Iwata
|
Yoritaka Iwata
|
Energy-dependent existence of soliton in the synthesis of chemical
elements
| null |
Mod. Phys. Lett. A 30 (2015) 1550088
|
10.1142/S0217732315500881
| null |
nlin.PS nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Light chemical elements are, for instance, produced through ion collisions
taking place in the core of stars, where fusion is particularly important to
the synthesis of chemical elements. Meanwhile soliton provides non-interacting
transparency leading to the hindrance of fusion cross section. In order to
explain high fusion cross section actually observed in low incident energies,
it is necessary to discover the suppression mechanism of soliton propagation.
In this paper, based on a systematic three-dimensional time-dependent density
functional calculation, the existence of soliton is examined for ion collisions
with some incident energies, impact parameters, and nuclear force parameter
sets. As a result solitons are suggested to exist highly depending on the
energy. The suppression of soliton is consequently due to the spin-orbit force
and the momentum-dependent components of the nuclear force.
|
[{'version': 'v1', 'created': 'Sat, 22 Feb 2014 01:17:18 GMT'}]
|
2015-05-06
|
[array(['Iwata', 'Yoritaka', ''], dtype=object)]
|
1,186 |
2103.01152
|
Adam McCaughan
|
A. N. McCaughan, A. M. Tait, S. M. Buckley, D. M. Oh, J. T. Chiles, J.
M. Shainline, S. W. Nam
|
PHIDL: Python CAD layout and geometry creation for nanolithography
| null | null |
10.1116/6.0001203
| null |
cond-mat.supr-con cs.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Computer-aided design (CAD) has become a critical element in the creation of
nanopatterned structures and devices. In particular, with the increased
adoption of easy-to-learn programming languages like Python there has been a
significant rise in the amount of lithographic geometries generated through
scripting and programming. However, there are currently unaddressed gaps in
usability for open-source CAD tools -- especially those in the GDSII design
space -- that prevent wider adoption by scientists and students who might
otherwise benefit from scripted design. For example, constructing relations
between adjacent geometries is often much more difficult than necessary --
spacing a resonator structure a few micrometers from a readout structure often
requires manually-coding the placement arithmetic. While inconveniences like
this can be overcome by writing custom functions, they are often significant
barriers to entry for new users or those less familiar with programming. To
help streamline the design process and reduce barrier to entry for scripting
designs, we have developed PHIDL, an open-source GDSII-based CAD tool for
Python 2 and 3.
|
[{'version': 'v1', 'created': 'Mon, 1 Mar 2021 17:44:03 GMT'}]
|
2021-10-13
|
[array(['McCaughan', 'A. N.', ''], dtype=object)
array(['Tait', 'A. M.', ''], dtype=object)
array(['Buckley', 'S. M.', ''], dtype=object)
array(['Oh', 'D. M.', ''], dtype=object)
array(['Chiles', 'J. T.', ''], dtype=object)
array(['Shainline', 'J. M.', ''], dtype=object)
array(['Nam', 'S. W.', ''], dtype=object)]
|
1,187 |
1708.04851
|
Takatoshi Motoyama
|
Takatoshi Motoyama and Kai Cai
|
Top-Down Synthesis of Multi-Agent Formation Control: An Eigenstructure
Assignment based Approach
|
15 pages, 4 figures
| null | null | null |
cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a top-down approach for formation control of heterogeneous
multi-agent systems, based on the method of eigenstructure assignment. Given
the problem of achieving scalable formations on the plane, our approach
globally computes a state feedback control that assigns desired closed-loop
eigenvalues/eigenvectors. We characterize the relation between the
eigenvalues/eigenvectors and the resulting inter-agent communication topology,
and design special (sparse) topologies such that the synthesized control may be
implemented locally by the individual agents. Moreover, we present a
hierarchical synthesis procedure that significantly improves computational
efficiency. Finally, we extend the proposed approach to achieve rigid formation
and circular motion, and illustrate these results by simulation examples.
|
[{'version': 'v1', 'created': 'Wed, 16 Aug 2017 11:31:21 GMT'}]
|
2017-08-17
|
[array(['Motoyama', 'Takatoshi', ''], dtype=object)
array(['Cai', 'Kai', ''], dtype=object)]
|
1,188 |
1405.1923
|
Alexander Leshansky
|
Z. Li, A. M. Leshansky, L. M. Pismen and P. Tabeling
|
Step-emulsification in nanofluidic device
| null | null | null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we present a comprehensive study of the step-emulsification
process for high-throughput production of (sub-)$\mu$m-size monodisperse
droplets. The microfluidic device combines a Hele-Shaw nanofluidic cell with a
step-like outlet to a deep and wide reservoir. The proposed theory based on
Hele-Shaw hydrodynamics provides the quasi-static shape of the free boundary
between the disperse liquid phase engulfed by the co-flowing continuous phase
prior to transition to oscillatory step-emulsification at low enough capillary
number. At the transition the proposed theory anticipates a simple condition
for critical capillary number as a function of the Hele-Shaw cell geometry. The
transition threshold is in excellent agreement with experimental data. A simple
closed-form expression for the size of the droplets generated in
step-emulsification regime derived using simple geometric arguments also shows
a very good agreement with the experimental results.
|
[{'version': 'v1', 'created': 'Thu, 8 May 2014 13:41:50 GMT'}
{'version': 'v2', 'created': 'Wed, 14 May 2014 14:04:26 GMT'}]
|
2014-05-15
|
[array(['Li', 'Z.', ''], dtype=object)
array(['Leshansky', 'A. M.', ''], dtype=object)
array(['Pismen', 'L. M.', ''], dtype=object)
array(['Tabeling', 'P.', ''], dtype=object)]
|
1,189 |
math/0110052
|
Adrian Butscher
|
Adrian Butscher
|
Deformations of minimal Lagrangian submanifolds with boundary
|
Final version; to appear in Proceedings of the American Mathematical
Society. The presentation is somewhat cleaner in places and the result is
restated for a general Calabi-Yau setting
| null | null | null |
math.DG math.AP
| null |
Let $L$ be a special Lagrangian submanifold of a compact, Calabi-Yau manifold
$M$ with boundary lying on the symplectic, codimension 2 submanifold $W$. It is
shown how deformations of $L$ which keep the boundary of $L$ confined to $W$
can be described by an elliptic boundary value problem, and two results about
minimal Lagrangian submanifolds with boundary are derived using this fact. The
first is that the space of minimal Lagrangian submanifolds near $L$ with
boundary on $W$ is found to be finite dimensional and is parametrised over the
space of harmonic 1-forms of $L$ satisfying Neumann boundary conditions. The
second is that if $W'$ is a symplectic, codimension 2 submanifold sufficiently
near $W$, then under suitable conditions, there exists a minimal Lagrangian
submanifold $L'$ near $L$ with boundary on $W'$.
|
[{'version': 'v1', 'created': 'Thu, 4 Oct 2001 10:30:42 GMT'}
{'version': 'v2', 'created': 'Thu, 10 Jan 2002 09:27:37 GMT'}]
|
2007-05-23
|
[array(['Butscher', 'Adrian', ''], dtype=object)]
|
1,190 |
2306.10883
|
Leandro Bufai\c{c}al
|
J. R. L. Mardegan, L. S. I. Veiga, T. Pohlmann, S. S. Dhesi, S.
Francoual, J. R. Jesus, C. Macchiutti, E. M. Bittar, and L. Bufai\c{c}al
|
The 3d and 5d electronic structures and orbital hybridization in Ba- and
Ca-doped La2CoIrO6 double perovskite
|
10 pages, 6 figures
|
Physical Review B 107, 214427 (2023)
|
10.1103/PhysRevB.107.214427
| null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
Here we present a detailed investigation of the Co and Ir local electronic
structures in La1.5A0.5CoIrO6 (A = Ba, Ca) compounds in order to unravel the
orbital hybridization mechanism in these CoIr-based double perovskites. Our
results of x-ray powder diffraction, ac and dc magnetization, Co and Ir
L2,3-edges and Co K-edge x-ray absorption spectroscopy and x-ray magnetic
circular dichroism suggest a competition between magnetic interactions. A
dominant antiferromagnetic coupling is found to be responsible for the
ferrimagnetic behavior observed for A = Ca below approximately 96 K, the
competing magnetic phases and the cationic disorder in this compound giving
rise to a spin-glass state at low temperatures. For the A = Ba, on the other
hand, there is no evidence of long range order down to its spin-glass
transition temperature. The remarkably different magnetic properties observed
between these two compounds is discussed in terms of the structural distortion
that alters the strength of the Co - Ir couplings, with a relevant role played
by the Co 3d eg - Ir 5d j = 1/2 hybridization.
|
[{'version': 'v1', 'created': 'Mon, 19 Jun 2023 12:27:38 GMT'}]
|
2023-06-21
|
[array(['Mardegan', 'J. R. L.', ''], dtype=object)
array(['Veiga', 'L. S. I.', ''], dtype=object)
array(['Pohlmann', 'T.', ''], dtype=object)
array(['Dhesi', 'S. S.', ''], dtype=object)
array(['Francoual', 'S.', ''], dtype=object)
array(['Jesus', 'J. R.', ''], dtype=object)
array(['Macchiutti', 'C.', ''], dtype=object)
array(['Bittar', 'E. M.', ''], dtype=object)
array(['Bufaiçal', 'L.', ''], dtype=object)]
|
1,191 |
math/9906076
|
Ian McIntosh
|
Ian McIntosh
|
Harmonic tori and generalised Jacobi varieties
|
LaTeX2e, 26 pages. Longer introduction for clarity, corrections
throughout, slight re-arangement of material in section 3. To appear in:
Communications in Analysis and Geometry
|
Comm. Anal. Geom 9 (2001) no.2 423-449
| null | null |
math.DG math.AG
| null |
This article shows that every non-isotropic harmonic 2-torus in complex
projective space factors through a generalised Jacobi variety related to the
spectral curve. Each map is composed of a homomorphism into the variety and a
rational map off it. The same ideas allow one to construct (pluri)-harmonic
maps of finite type from Euclidean space into Grassmannians and the projective
unitary groups. Further, some of these maps will be purely algebraic. For maps
into complex projective space the algebraic maps of the plane are always doubly
periodic i.e. they yield 2-tori. The classification of all these algebraic maps
remains open.
|
[{'version': 'v1', 'created': 'Fri, 11 Jun 1999 18:02:13 GMT'}
{'version': 'v2', 'created': 'Wed, 5 Jan 2000 14:19:18 GMT'}]
|
2007-05-23
|
[array(['McIntosh', 'Ian', ''], dtype=object)]
|
1,192 |
hep-ph/0609212
|
Joao Pacheco B. C. de Melo Dr.
|
J.P.B.C. de Melo (1,2), J. S. Veiga (1), T. Frederico, (3), E. Pace
(4,5), G. Salme (5,6), ((1) CETEC, Universidade Cruzeiro do Sul, UNICSUL, (2)
IFT, UNESP, Brazil, (3) ITA, CTA, Sao Jose dos Campos, Brazil, (4) Universita
di Roma Tour Vergata, Rome, Italy, (5) INFN, Rome, Italy, (6) Universita di
Rome La Sapienza and INFN, Rome, Italy)
|
Pole Approximation for the pion eletromagnetic form factor within
light-front dynamics
|
Talk given in the "Continuous Advances in QCD 2006", May 11-14, 2006
Minneapolis, University of Minnesota, Minnesota, USA. To appear in the
proceedings. Use wspc style, 3 eps figues, 7 pages
| null |
10.1142/9789812708267_0064
| null |
hep-ph hep-ex nucl-th
| null |
We carefully investigate the reliability of the propagator Pole
Approximation, i.e, the approximation of retaining only the propagator in the
evaluation of the Mandelstam covariant expression for the eletromagnetic
current of the pion. Different frames are analyzed, in order to find the most
suitable one for calculating the pion form factor within the proposed
approximation. It turns out that approximation is more accurate in the frame
where q^+ is maximal. The relevance of the Pole Approximation is briefly
discussed in view of calculations of hadrons factors basead wave functions
generate by dynamical models.
|
[{'version': 'v1', 'created': 'Wed, 20 Sep 2006 17:43:10 GMT'}]
|
2017-08-23
|
[array(['de Melo', 'J. P. B. C.', ''], dtype=object)
array(['Veiga', 'J. S.', ''], dtype=object)
array(['Frederico', 'T.', ''], dtype=object)
array(['Pace', 'E.', ''], dtype=object)
array(['Salme', 'G.', ''], dtype=object)]
|
1,193 |
1212.4699
|
Nan Li
|
Nan Li and Lihong Zhi
|
Verified Error Bounds for Isolated Singular Solutions of Polynomial
Systems
|
23 pages
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we generalize the algorithm described by Rump and Graillat, as
well as our previous work on certifying breadth-one singular solutions of
polynomial systems, to compute verified and narrow error bounds such that a
slightly perturbed system is guaranteed to possess an isolated singular
solution within the computed bounds. Our new verification method is based on
deflation techniques using smoothing parameters. We demonstrate the performance
of the algorithm for systems with singular solutions of multiplicity up to
hundreds.
|
[{'version': 'v1', 'created': 'Wed, 19 Dec 2012 15:10:23 GMT'}]
|
2012-12-20
|
[array(['Li', 'Nan', ''], dtype=object)
array(['Zhi', 'Lihong', ''], dtype=object)]
|
1,194 |
1105.0299
|
Tobias Grass
|
T. Grass, M. A. Baranov, M. Lewenstein
|
Robustness of Fractional Quantum Hall States with Dipolar Atoms in
Artificial Gauge Fields
| null |
Phys. Rev. A 84, 043605 (2011)
|
10.1103/PhysRevA.84.043605
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The robustness of fractional quantum Hall states is measured as the energy
gap separating the Laughlin ground-state from excitations. Using thermodynamic
approximations for the correlation functions of the Laughlin state and the
quasihole state, we evaluate the gap in a two-dimensional system of dipolar
atoms exposed to an artificial gauge field. For Abelian fields, our results
agree well with the results of exact diagonalization for small systems, but
indicate that the large value of the gap predicted in [Phys. Rev. Lett. 94,
070404 (2005)] was overestimated. However, we are able to show that the small
gap found in the Abelian scenario is dramatically increased if we turn to
non-Abelian fields squeezing the Landau levels.
|
[{'version': 'v1', 'created': 'Mon, 2 May 2011 10:58:24 GMT'}]
|
2011-10-10
|
[array(['Grass', 'T.', ''], dtype=object)
array(['Baranov', 'M. A.', ''], dtype=object)
array(['Lewenstein', 'M.', ''], dtype=object)]
|
1,195 |
2210.09522
|
Naga Manasa Vempati
|
Benjamin Jaye and Manasa N. Vempati
|
Even singular integral operators that are well behaved on a purely
unrectifiable set
| null | null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove the existence of a $(d-2)$-dimensional purely unrectifiable set upon
which a family of \emph{even} singular integral operators is bounded.
|
[{'version': 'v1', 'created': 'Tue, 18 Oct 2022 01:29:38 GMT'}
{'version': 'v2', 'created': 'Thu, 3 Nov 2022 18:20:18 GMT'}]
|
2022-11-07
|
[array(['Jaye', 'Benjamin', ''], dtype=object)
array(['Vempati', 'Manasa N.', ''], dtype=object)]
|
1,196 |
1109.5568
|
Oleksii Shevtsov
|
Oleksii Shevtsov, Pierre Carmier, Christoph Groth, Xavier Waintal and
David Carpentier
|
Tunable thermopower in a graphene-based topological insulator
|
7 pages, 5 figures
|
Phys. Rev. B 85, 245441 (2012)
|
10.1103/PhysRevB.85.245441
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Following the recent proposal by Weeks et al., which suggested that indium
(or thallium) adatoms deposited on the surface of graphene should turn the
latter into a quantum spin Hall (QSH) insulator characterized by a sizeable
gap, we perform a systematic study of the transport properties of this system
as a function of the density of randomly distributed adatoms. While the samples
are, by construction, very disordered, we find that they exhibit an extremely
stable QSH phase with no signature of the spatial inhomogeneities of the adatom
configuration. We find that a simple rescaling of the spin-orbit coupling
parameter allows us to account for the behaviour of the inhomogeneous system
using a homogeneous model. This robustness opens the route to a much easier
experimental realization of this topological insulator. We additionally find
this material to be a very promising candidate for thermopower generation with
a target temperature tunable from 1 to 80K and an efficiency ZT close to 1.
|
[{'version': 'v1', 'created': 'Mon, 26 Sep 2011 13:50:51 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Jun 2012 14:17:20 GMT'}]
|
2012-06-27
|
[array(['Shevtsov', 'Oleksii', ''], dtype=object)
array(['Carmier', 'Pierre', ''], dtype=object)
array(['Groth', 'Christoph', ''], dtype=object)
array(['Waintal', 'Xavier', ''], dtype=object)
array(['Carpentier', 'David', ''], dtype=object)]
|
1,197 |
2107.11253
|
Quentin Malartic
|
Quentin Malartic, Alban Farchi, Marc Bocquet
|
State, global and local parameter estimation using local ensemble Kalman
filters: applications to online machine learning of chaotic dynamics
| null | null |
10.1002/qj.4297
| null |
stat.ML cs.LG nlin.CD physics.ao-ph physics.data-an
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a recent methodological paper, we showed how to learn chaotic dynamics
along with the state trajectory from sequentially acquired observations, using
local ensemble Kalman filters. Here, we more systematically investigate the
possibility to use a local ensemble Kalman filter with either covariance
localisation or local domains, in order to retrieve the state and a mix of key
global and local parameters. Global parameters are meant to represent the
surrogate dynamical core, for instance through a neural network, which is
reminiscent of data-driven machine learning of dynamics, while the local
parameters typically stand for the forcings of the model. Aiming at joint state
and parameter estimation, a family of algorithms for covariance and local
domain localisation is proposed. In particular, we show how to rigorously
update global parameters using a local domain ensemble Kalman filter (EnKF)
such as the local ensemble transform Kalman filter (LETKF), an inherently local
method. The approach is tested with success on the 40-variable Lorenz model
using several of the local EnKF flavors. A two-dimensional illustration based
on a multi-layer Lorenz model is finally provided. It uses radiance-like
non-local observations. It features both local domains and covariance
localisation in order to learn the chaotic dynamics and the local forcings.
This paper more generally addresses the key question of online estimation of
both global and local model parameters.
|
[{'version': 'v1', 'created': 'Fri, 23 Jul 2021 14:12:20 GMT'}
{'version': 'v2', 'created': 'Mon, 26 Jul 2021 08:46:24 GMT'}
{'version': 'v3', 'created': 'Wed, 15 Dec 2021 13:22:27 GMT'}
{'version': 'v4', 'created': 'Fri, 25 Mar 2022 11:31:11 GMT'}]
|
2022-10-19
|
[array(['Malartic', 'Quentin', ''], dtype=object)
array(['Farchi', 'Alban', ''], dtype=object)
array(['Bocquet', 'Marc', ''], dtype=object)]
|
1,198 |
1411.7220
|
Atilla Yilmaz
|
Onur G\"un and Atilla Yilmaz
|
Fluid limit for the Poisson encounter-mating model
|
23 pages, 1 figure. We resolved a technical issue in the beginning of
Section 2.1, included a self-contained proof of Theorem 2.1, removed the part
about the diffusion limit which did not fit the rest of the paper (hence the
revised title), corrected/completed the proof of Theorem 4.1, and made
various other (minor) changes
| null | null | null |
math.PR q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Stochastic encounter-mating (SEM) models describe monogamous permanent pair
formation in finite zoological populations of multitype females and males. In
this article, we study SEM with Poisson firing times. First, we prove that the
model enjoys a fluid limit as the population size diverges, i.e., the
stochastic dynamics converges to a deterministic system governed by coupled
ODEs. Then, we convert these ODEs to the well-known Lotka-Volterra and
replicator equations from population dynamics. Next, under the so-called fine
balance condition which characterizes panmixia, we solve the corresponding
replicator equations and give an exact expression for the fluid limit. Finally,
we consider the case with two types of females and males. Without the fine
balance assumption, but under certain symmetry conditions, we give an explicit
formula for the limiting mating pattern, and then use it to characterize
assortative mating.
|
[{'version': 'v1', 'created': 'Wed, 26 Nov 2014 13:36:43 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Nov 2016 11:22:31 GMT'}]
|
2016-11-23
|
[array(['Gün', 'Onur', ''], dtype=object)
array(['Yilmaz', 'Atilla', ''], dtype=object)]
|
1,199 |
1511.03387
|
Sandipan Dutta
|
S. Dutta, Yongjin Lee and Y.S. Jho
|
Hydration of ions in two dimensional water
|
11 Figures
|
Physical Review E 92, 042152 (2015)
|
10.1103/PhysRevE.92.042152
| null |
cond-mat.soft physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a 2D lattice model of water to study the effects of ion hydration
on the properties of water. We map the water molecules as lattice particles
consisting of a single Oxygen at the center of a site and two Hydrogen atoms on
each side. The internal state of the system, such as the dipole moment at a
site, is defined with respect to the location of the Hydrogen atoms at the site
depending on their role in Hydrogen bonds (H-bonds) being a donor or an
acceptor. We study the influence of the charge and the radius of the ion on the
insertion energy and on the H-bonds in the first and second hydration layers
around the ion and in the bulk. In particular we analyze how the competing
interactions of the short-ranged H-bonds and the long-ranged electrostatics
influence the hydration properties. The role of the ion both as a source of the
electrostatic interactions as well as a defect is also discussed. Our model
also shows the well known fact that the polarizability of the water molecules
destroys the hydrogen bond network and increases the dipole moment of the
molecules near the ion.
|
[{'version': 'v1', 'created': 'Wed, 11 Nov 2015 04:36:32 GMT'}]
|
2015-11-12
|
[array(['Dutta', 'S.', ''], dtype=object)
array(['Lee', 'Yongjin', ''], dtype=object)
array(['Jho', 'Y. S.', ''], dtype=object)]
|
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