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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
18,300 |
hep-ph/9503211
| null |
D. Schildknecht
|
A Remark on the $Z^0 \to b\bar b$ Width
|
8 pages uuencoded postscript including 2 figures
|
Phys.Lett. B355 (1995) 325-328
|
10.1016/0370-2693(95)00662-5
|
BI-TP 95/09
|
hep-ph
| null |
The $Z^0 \to b\bar b$ width, $\Gamma_b$, is analysed in conjunction with the
total and hadronic $Z^0$ widths, $\Gamma_T$ and $\Gamma_h$. Assuming,
tentatively, that the present 2$\sigma$ discrepancy in $\Gamma_b$ will
substantiate as time goes on, for large values of $m_H$ it will be sufficient
to modify the $Z^0 b \bar b$ vertex only. In contrast, for small values of
$m_H$, the theoretical predictions for both the $Z^0$ width into light quarks
and leptons as well as the $Z^0 \to b\bar b$ vertex will have to be modified.
|
[{'version': 'v1', 'created': 'Thu, 2 Mar 1995 13:57:00 GMT'}]
|
2016-09-01
|
[array(['Schildknecht', 'D.', ''], dtype=object)]
|
18,301 |
1011.5487
|
Silviu Pufu
|
Christopher P. Herzog, Igor R. Klebanov, Silviu S. Pufu, and Tiberiu
Tesileanu
|
Multi-Matrix Models and Tri-Sasaki Einstein Spaces
|
36 pages, 8 figures; v2 improved section 4, refs added; v3 minor
improvements, ref added, PRD version
|
Phys.Rev.D83:046001,2011
|
10.1103/PhysRevD.83.046001
|
PUPT-2359
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Localization methods reduce the path integrals in {\cal N} >= 2
supersymmetric Chern-Simons gauge theories on S^3 to multi-matrix integrals. A
recent evaluation of such a two-matrix integral for the {\cal N}=6
superconformal U(N) x U(N) ABJM theory produced detailed agreement with the
AdS/CFT correspondence, explaining, in particular the N^{3/2} scaling of the
free energy. We study a class of p-matrix integrals describing {\cal N}=3
superconformal U(N)^p Chern-Simons gauge theories. We present a simple method
that allows us to evaluate the eigenvalue densities and the free energies in
the large N limit keeping the Chern-Simons levels k_i fixed. The dual M-theory
backgrounds are AdS_4 x Y, where Y are seven-dimensional tri-Sasaki Einstein
spaces specified by the k_i. The gravitational free energy scales inversely
with the square root of the volume of Y. We find a general formula for the
p-matrix free energies that agrees with the available results for volumes of
the tri-Sasaki Einstein spaces Y, thus providing a thorough test of the
corresponding AdS_4/CFT_3 dualities. This formula is consistent with the
Seiberg duality conjectured for Chern-Simons gauge theories.
|
[{'version': 'v1', 'created': 'Wed, 24 Nov 2010 20:20:34 GMT'}
{'version': 'v2', 'created': 'Fri, 17 Dec 2010 00:27:51 GMT'}
{'version': 'v3', 'created': 'Sat, 19 Mar 2011 21:19:23 GMT'}]
|
2015-03-17
|
[array(['Herzog', 'Christopher P.', ''], dtype=object)
array(['Klebanov', 'Igor R.', ''], dtype=object)
array(['Pufu', 'Silviu S.', ''], dtype=object)
array(['Tesileanu', 'Tiberiu', ''], dtype=object)]
|
18,302 |
math/9404207
|
J\"org Wenzel
|
Joerg Wenzel
|
Real and complex operator ideals
| null | null | null |
Banach Archive 4/12/94
|
math.FA
| null |
The powerful concept of an operator ideal on the class of all Banach spaces
makes sense in the real and in the complex case. In both settings we may, for
example, consider compact, nuclear, or $2$--summing operators, where the
definitions are adapted to each other in a natural way. This paper deals with
the question whether or not that fact is based on a general philosophy. Does
there exists a one--to--one correspondence between ``real properties'' and
``complex properties'' defining an operator ideal? In other words, does there
exist for every real operator ideal a uniquely determined corresponding complex
ideal and vice versa?
Unfortunately, we are not abel to give a final answer. Nevertheless, some
preliminary results are obtained. In particular, we construct for every real
operator ideal a corresponding complex operator ideal and for every complex
operator ideal a corresponding real one. However, we conjecture that there
exists a complex operator ideal which can not be obtained from a real one by
this construction.
The following approach is based on the observation that every complex Banach
space can be viewed as a real Banach space with an isometry acting on it like
the scalar multiplication by the imaginary unit $i$.
|
[{'version': 'v1', 'created': 'Tue, 12 Apr 1994 18:19:13 GMT'}]
|
2016-09-06
|
[array(['Wenzel', 'Joerg', ''], dtype=object)]
|
18,303 |
hep-ph/9609467
|
Leutwyler Heinrich
|
H. Leutwyler (University of Bern and CERN)
|
Light Quark Masses
|
16 pages, 3 postscript figures
|
NATO Adv.Study Inst.Ser.B Phys.363:149-164,1997
| null | null |
hep-ph
| null |
Lecture Notes, Summer School on Masses of Fundamental Particles, Cargese,
1996. In the first part, some qualitative aspects the mass pattern are
discussed, concerning the breaking of isospin and eightfold way symmetries. The
second part deals with the chiral perturbation theory results for the masses of
the pseudoscalar octet, which lead to very stringent constraints for the
relative size of the light quark masses.
|
[{'version': 'v1', 'created': 'Wed, 25 Sep 1996 10:04:47 GMT'}]
|
2009-02-16
|
[array(['Leutwyler', 'H.', '', 'University of Bern and CERN'], dtype=object)]
|
18,304 |
1512.07217
|
Dmytro Iakubovskyi
|
Oleg Ruchayskiy, Alexey Boyarsky, Dmytro Iakubovskyi, Esra Bulbul,
Dominique Eckert, Jeroen Franse, Denys Malyshev, Maxim Markevitch, Andrii
Neronov
|
Searching for decaying dark matter in deep XMM-Newton observation of the
Draco dwarf spheroidal
|
10 pages, 5 figures. Accepted by MNRAS
| null |
10.1093/mnras/stw1026
| null |
astro-ph.HE hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present results of a search for the 3.5 keV emission line in our recent
very long (~ 1.4 Ms) XMM-Newton observation of the Draco dwarf spheroidal
galaxy. The astrophysical X-ray emission from such dark matter-dominated
galaxies is faint, thus they provide a test for the dark matter origin of the
3.5 keV line previously detected in other massive, but X-ray bright objects,
such as galaxies and galaxy clusters. We do not detect a statistically
significant emission line from Draco; this constrains the lifetime of a
decaying dark matter particle to tau > (7-9) x 10^27 s at 95% CL (combining all
three XMM-Newton cameras; the interval corresponds to the uncertainty of the
dark matter column density in the direction of Draco). The PN camera, which has
the highest sensitivity of the three, does show a positive spectral residual
(above the carefully modeled continuum) at E = 3.54 +/- 0.06 keV with a 2.3
sigma significance. The two MOS cameras show less-significant or no positive
deviations, consistently within 1 sigma with PN. Our Draco limit on tau is
consistent with previous detections in the stacked galaxy clusters, M31 and the
Galactic Center within their 1-2 sigma uncertainties, but is inconsistent with
the high signal from the core of the Perseus cluster (which has itself been
inconsistent with the rest of the detections). We conclude that this Draco
observation does not exclude the dark matter interpretation of the 3.5 keV line
in those objects.
|
[{'version': 'v1', 'created': 'Tue, 22 Dec 2015 19:44:09 GMT'}
{'version': 'v2', 'created': 'Wed, 23 Dec 2015 17:43:48 GMT'}
{'version': 'v3', 'created': 'Fri, 29 Apr 2016 14:06:01 GMT'}]
|
2016-05-25
|
[array(['Ruchayskiy', 'Oleg', ''], dtype=object)
array(['Boyarsky', 'Alexey', ''], dtype=object)
array(['Iakubovskyi', 'Dmytro', ''], dtype=object)
array(['Bulbul', 'Esra', ''], dtype=object)
array(['Eckert', 'Dominique', ''], dtype=object)
array(['Franse', 'Jeroen', ''], dtype=object)
array(['Malyshev', 'Denys', ''], dtype=object)
array(['Markevitch', 'Maxim', ''], dtype=object)
array(['Neronov', 'Andrii', ''], dtype=object)]
|
18,305 |
1902.06655
|
Elisardo Antelo
|
Elisardo Antelo
|
ENBB Processor: Towards the ExaScale Numerical Brain Box [Position
Paper]
|
This paper describes an idea for a new processor that I wanted to
develop but I was not able to got support for this
| null | null | null |
cs.AR
|
http://creativecommons.org/publicdomain/zero/1.0/
|
ExaScale systems will be a key driver for simulations that are essential for
advance of science and economic growth. We aim to present a new concept of
microprocessor for floating-point computations useful for being a basic
building block of ExaScale systems and beyond. The proposed microprocessor
architecture has a frontend for programming interface based on the concept of
event-driven simulation. The user program is executed as an event-driven
simulation using a hardware/software co-designed simulator. This is the
flexible part of the system. The back-end exploits the concept of uniform
topology as in a brain: a massive packet switched interconnection network with
flit credit-based flow control with virtual channels that incorporates
seamlessly communication, arithmetic and storage. Floating-point computations
are incorporated as on-line arithmetic operators in the output ports of the
switches as virtual arithmetic output channels, and storage as virtual input
channels. The front-end carries out the event-driven simulation of the user
program, and uses the arithmetic network for the hard floating-point work by
means of virtual dataflows. We expect to reduce significantly the needs of main
memory due to the execution model proposed, where variables are just virtual
interconnections in the network or signals stored in the virtual channels.
Moreover, we have the hypothesis that the problem size assigned to a
microprocessor should allow maximum concurrency and it should not be oversized.
This may lead to systems composed of microprocessors with main memory
incorporated in 3D chips. We identified several challenges that a research to
develop this microprocessor should address, and several hypothesis that should
be demonstrated by means of scientific evidence.
|
[{'version': 'v1', 'created': 'Mon, 18 Feb 2019 17:21:04 GMT'}]
|
2019-02-19
|
[array(['Antelo', 'Elisardo', ''], dtype=object)]
|
18,306 |
2207.06855
|
Giorgos Leloudas
|
Giorgos Leloudas, Mattia Bulla, Aleksandar Cikota, Lixin Dai, Lars L.
Thomsen, Justyn R. Maund, Panos Charalampopoulos, Nathaniel Roth, Iair
Arcavi, Katie Auchettl, Daniele B. Malesani, Matt Nicholl, Enrico
Ramirez-Ruiz
|
An asymmetric electron-scattering photosphere around optical tidal
disruption events
|
Author's version of paper to appear in Nature Astronomy. In the
journal version the detailed discussion on the ISP determination will be
moved from the Methods section to a Supplementary Information section. 58
pages in double spacing format, including 5 Figures, 10 Extended Data Figures
and 2 Tables
| null | null | null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A star crossing the tidal radius of a supermassive black hole will be
spectacularly ripped apart with an accompanying burst of radiation. A few tens
of such tidal disruption events (TDEs) have now been identified in the optical
wavelengths, but the exact origin of the strong optical emission remains
inconclusive. Here we report polarimetric observations of three TDEs. The
continuum polarization is independent of wavelength, while emission lines are
partially depolarized. These signatures are consistent with optical photons
being scattered and polarized in an envelope of free electrons. An almost
axisymmetric photosphere viewed from different angles is in broad agreement
with the data, but there is also evidence for deviations from axial symmetry
before the peak of the flare and significant time evolution at early times,
compatible with the rapid formation of an accretion disk. By combining a
super-Eddington accretion model with a radiative transfer code we generate
predictions for the degree of polarization as a function of disk mass and
viewing angle, and we show that the predicted levels are compatible with the
observations, for extended reprocessing envelopes of $\sim$1000 gravitational
radii. Spectropolarimetry therefore constitutes a new observational test for
TDE models, and opens an important new line of exploration in the study of
TDEs.
|
[{'version': 'v1', 'created': 'Thu, 14 Jul 2022 12:20:29 GMT'}]
|
2022-07-15
|
[array(['Leloudas', 'Giorgos', ''], dtype=object)
array(['Bulla', 'Mattia', ''], dtype=object)
array(['Cikota', 'Aleksandar', ''], dtype=object)
array(['Dai', 'Lixin', ''], dtype=object)
array(['Thomsen', 'Lars L.', ''], dtype=object)
array(['Maund', 'Justyn R.', ''], dtype=object)
array(['Charalampopoulos', 'Panos', ''], dtype=object)
array(['Roth', 'Nathaniel', ''], dtype=object)
array(['Arcavi', 'Iair', ''], dtype=object)
array(['Auchettl', 'Katie', ''], dtype=object)
array(['Malesani', 'Daniele B.', ''], dtype=object)
array(['Nicholl', 'Matt', ''], dtype=object)
array(['Ramirez-Ruiz', 'Enrico', ''], dtype=object)]
|
18,307 |
2207.05892
|
Kenneth Lopata
|
Aderonke S. Folorunso, Fran\c{c}ois Mauger, Kyle A. Hamer, Denawakage
D Jayasinghe, Imam Wahyutama, Justin R. Ragains, Robert R. Jones, Louis F.
DiMauro, Mette B. Gaarde, Kenneth J. Schafer, Kenneth Lopata
|
Attochemistry Regulation of Charge Migration
|
5 pages, 3 figures
| null | null | null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Charge migration (CM) is a coherent attosecond process that involves the
movement of localized holes across a molecule. To determine the relationship
between a molecule's structure and the CM dynamics it exhibits, we perform
systematic studies of para-functionalized bromobenzene molecules
(X-C$_6$H$_4$-R) using real-time time-dependent density functional theory. We
initiate valence-electron dynamics by emulating rapid strong-field ionization
leading to a localized hole on the bromine atom. The resulting CM, which takes
on the order of 1 fs, occurs via an X localized to C$_6$H$_4$ delocalized to R
localized mechanism. Interestingly, the hole contrast on the acceptor
functional group increases with increasing electron donating strength. This
trend is well-described by the Hammett sigma value of the group, which is a
commonly used metric for quantifying the effect of functionalization on the
chemical reactivity of benzene derivatives. These results suggest that simple
attochemistry principles and a density-based picture can be used to predict and
understand CM.
|
[{'version': 'v1', 'created': 'Tue, 12 Jul 2022 23:43:00 GMT'}]
|
2022-07-14
|
[array(['Folorunso', 'Aderonke S.', ''], dtype=object)
array(['Mauger', 'François', ''], dtype=object)
array(['Hamer', 'Kyle A.', ''], dtype=object)
array(['Jayasinghe', 'Denawakage D', ''], dtype=object)
array(['Wahyutama', 'Imam', ''], dtype=object)
array(['Ragains', 'Justin R.', ''], dtype=object)
array(['Jones', 'Robert R.', ''], dtype=object)
array(['DiMauro', 'Louis F.', ''], dtype=object)
array(['Gaarde', 'Mette B.', ''], dtype=object)
array(['Schafer', 'Kenneth J.', ''], dtype=object)
array(['Lopata', 'Kenneth', ''], dtype=object)]
|
18,308 |
2303.04311
|
Megan McCarthy
|
Megan J. McCarthy, Jacob Startt, R\'emi Dingreville, Aidan P.
Thompson, Mitchell A. Wood
|
Atomic Representations of Local and Global Chemistry in Complex Alloys
|
Version 3: updated funding statement, fixed typos, otherwise
unchanged. 15 pages, 6 main figures, 1 supplemental figure
| null | null | null |
physics.chem-ph cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by/4.0/
|
The exceptional properties observed in complex concentrated alloys (CCAs)
arise from the interplay between crystalline order and chemical disorder at the
atomic scale, complicating a unique determination of properties. In contrast to
conventional alloys, CCA properties emerge as distributions due to varying
local chemical environments and the specific scale of measurement. Currently
there are few ways to quantitatively define, track, and compare local alloy
compositions (versus a global label, i.e. equiatomic) contained in a CCA.
Molecular dynamics is used here to build descriptive metrics that connect a
global alloy composition to the diverse local alloy compositions that define
it. A machine-learned interatomic potential for MoNbTaTi is developed and we
use these metrics to investigate how property distributions change with
excursions in global-local composition space. Short-range order is examined
through the lens of local chemistry for the equiatomic composition,
demonstrating stark changes in vacancy formation energy with local chemistry
evolution.
|
[{'version': 'v1', 'created': 'Wed, 8 Mar 2023 01:22:19 GMT'}
{'version': 'v2', 'created': 'Tue, 11 Apr 2023 00:36:54 GMT'}
{'version': 'v3', 'created': 'Tue, 18 Apr 2023 13:01:00 GMT'}]
|
2023-04-19
|
[array(['McCarthy', 'Megan J.', ''], dtype=object)
array(['Startt', 'Jacob', ''], dtype=object)
array(['Dingreville', 'Rémi', ''], dtype=object)
array(['Thompson', 'Aidan P.', ''], dtype=object)
array(['Wood', 'Mitchell A.', ''], dtype=object)]
|
18,309 |
1603.00062
|
Andres Collinucci
|
Andres Collinucci, Simone Giacomelli, Raffaele Savelli, Roberto
Valandro
|
T-branes through 3d mirror symmetry
|
36 pages
| null |
10.1007/JHEP07(2016)093
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
T-branes are exotic bound states of D-branes, characterized by mutually
non-commuting vacuum expectation values for the worldvolume scalars. The
M/F-theory geometry lifting D6/D7-brane configurations is blind to the T-brane
data. In this paper, we make this data manifest, by probing the geometry with
an M2-brane. We find that the effect of a T-brane is to deform the membrane
worldvolume superpotential with monopole operators, which partially break the
three-dimensional flavor symmetry, and reduce supersymmetry from N=4 to N=2.
Our main tool is 3d mirror symmetry. Through this language, a very concrete
framework is developed for understanding T-branes in M-theory. This leads us to
uncover a new class of N=2 quiver gauge theories, whose Higgs branches mimic
those of membranes at ADE singularities, but whose Coulomb branches differ from
their N=4 counterparts.
|
[{'version': 'v1', 'created': 'Mon, 29 Feb 2016 21:44:54 GMT'}]
|
2016-08-24
|
[array(['Collinucci', 'Andres', ''], dtype=object)
array(['Giacomelli', 'Simone', ''], dtype=object)
array(['Savelli', 'Raffaele', ''], dtype=object)
array(['Valandro', 'Roberto', ''], dtype=object)]
|
18,310 |
2201.13239
|
Arbab Ibrahim Arbab
|
A. I. Arbab
|
Quantum mechanics with quaternionic mass
|
9 pages
|
Algebras Groups and Geometries, 38, 45 (2022)
|
10.29083/AGG.38.01.2022/SC45
| null |
physics.gen-ph quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Quantum mechanics with quaternionic mass is considered. The momentum
eigen-value equation with quaternionic mass yields the Klein-Gordon equation
with a mass consisting of longitudinal and traverse masses. The scalar field
total mass is found to be a sum of these masses. This field appears to be
connected with two subfields conserving linear momentum. It is found that a
particle with real mass satisfies the quantum Telegraph equation, whereas that
one with quaternionic mass satisfies the Klein-Gordon equation. A quantum force
acting on the particle is found to be proportional to its velocity. When the
particle field is coupled to an electromagnetic field, an additional term in
the particle's energy appears reflecting the interaction of the particle's
angular momentum with the magnetic field.
|
[{'version': 'v1', 'created': 'Tue, 4 Jan 2022 10:43:07 GMT'}]
|
2022-09-14
|
[array(['Arbab', 'A. I.', ''], dtype=object)]
|
18,311 |
1010.4312
|
Matthew D. Lehnert
|
M. D. Lehnert (1), N. P. H. Nesvadba (2), J.-G. Cuby (3), A. M.
Swinbank (4), S. Morris (5), B. Clement (3), C. J. Evans (6), M. N. Bremer
(7), S. Basa (3)
|
Spectroscopic confirmation of a galaxy at redshift z=8.6
|
Appeared in October 21 issue of Nature. More information can be found
at http://www.nature.com and http://www.eso.org. Versions of the data
presented in this paper can be found at
http://www.ias.u-psud.fr/pperso/nnesvadb/UDF38135539.html and ESO has been
asked to release the raw data and calibration files immediately
| null |
10.1038/nature09462
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Galaxies had their most significant impact on the Universe when they
assembled their first generations of stars. Energetic photons emitted by young,
massive stars in primeval galaxies ionized the intergalactic medium surrounding
their host galaxies, cleared sight-lines along which the light of the young
galaxies could escape, and fundamentally altered the physical state of the
intergalactic gas in the Universe continuously until the present day.
Observations of the Cosmic Microwave Background, and of galaxies and quasars at
the highest redshifts, suggest that the Universe was reionised through a
complex process that was completed about a billion years after the Big Bang, by
redshift z~6. Detecting ionizing Ly-alpha photons from increasingly distant
galaxies places important constraints on the timing, location and nature of the
sources responsible for reionisation. Here we report the detection of Ly-a
photons emitted less than 600 million years after the Big Bang. UDFy-38135539
is at a redshift z=8.5549+-0.0002, which is greater than those of the
previously known most distant objects, at z=8.2 and z=6.97. We find that this
single source is unlikely to provide enough photons to ionize the volume
necessary for the emission line to escape, requiring a significant contribution
from other, probably fainter galaxies nearby.
|
[{'version': 'v1', 'created': 'Wed, 20 Oct 2010 20:21:10 GMT'}]
|
2015-05-20
|
[array(['Lehnert', 'M. D.', ''], dtype=object)
array(['Nesvadba', 'N. P. H.', ''], dtype=object)
array(['Cuby', 'J. -G.', ''], dtype=object)
array(['Swinbank', 'A. M.', ''], dtype=object)
array(['Morris', 'S.', ''], dtype=object)
array(['Clement', 'B.', ''], dtype=object)
array(['Evans', 'C. J.', ''], dtype=object)
array(['Bremer', 'M. N.', ''], dtype=object)
array(['Basa', 'S.', ''], dtype=object)]
|
18,312 |
1801.08340
|
Carlos Quintero Quiroz
|
Carlos Quintero-Quiroz, M. C. Torrent and Cristina Masoller
|
State space reconstruction of spatially extended systems and of time
delayed systems from the time series of a scalar variable
| null | null |
10.1063/1.5023485
| null |
physics.data-an
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The space-time representation of high-dimensional dynamical systems that have
a well defined characteristic time scale has proven to be very useful to deepen
the understanding of such systems and to uncover hidden features in their
output signals. Genuine analogies between one-dimensional (1D) spatially
extended systems (1D SESs) and time delayed systems (TDSs) have been observed,
including similar pattern formation and propagation of localized structures. An
open question is if such analogies are limited to the space-time
representation, or, if it is possible to reconstruct similar attractors, from
the time series of an observed variable. In this work we address this issue by
considering a bistable 1D SES and two TDSs (a bistable system and a model of
two lasers with time delayed coupling). In these three examples we find that we
can reconstruct the underlying attractor in a three-dimensional pseudo-space,
where the evolution is governed by a polynomial potential. We also discuss the
limitations of the analogy between 1D SESs and TDSs.
|
[{'version': 'v1', 'created': 'Thu, 25 Jan 2018 10:27:46 GMT'}
{'version': 'v2', 'created': 'Fri, 4 May 2018 14:32:14 GMT'}]
|
2018-08-01
|
[array(['Quintero-Quiroz', 'Carlos', ''], dtype=object)
array(['Torrent', 'M. C.', ''], dtype=object)
array(['Masoller', 'Cristina', ''], dtype=object)]
|
18,313 |
hep-ph/0607343
|
Fiorella Burgio
|
M. Baldo, G. F. Burgio, P. Castorina, S. Plumari, and D. Zappala',
(Dipartimento di Fisica, Universita' di Catania, and INFN Sezione di Catania,
Italy)
|
Quark matter in neutron stars within the Nambu - Jona-Lasinio model and
confinement
|
5 pages,5 eps figures, title changed, references added, accepted by
Phys. Rev. C (Brief Report)
|
Phys.Rev.C75:035804,2007
|
10.1103/PhysRevC.75.035804
| null |
hep-ph astro-ph nucl-th
| null |
The quark matter equation of state (EOS) derived from the standard Nambu -
Jona-Lasinio (NJL) model is soft enough to render neutron stars (NS) unstable
at the onset of the deconfined phase, and no pure quark matter can be actually
present in its interior. Since this is a peculiarity of the NJL model, we have
studied a modified NJL model with a momentum cut-off which depends on the
density. This procedure, which improves the agreement between QCD and NJL model
at large density, modifies the standard NJL equation of state, and then it is
potentially relevant for the stability analysis of neutron stars. We show that
also within this approach, the NS instability still persists, and that the
vacuum pressure, as a signal of quark confinement, has a fundamental role for
the NS stability. In this respect, our conclusions point to a relationship
between confinement and NS stability.
|
[{'version': 'v1', 'created': 'Mon, 31 Jul 2006 12:38:44 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Feb 2007 09:32:37 GMT'}]
|
2008-11-26
|
[array(['Baldo', 'M.', ''], dtype=object)
array(['Burgio', 'G. F.', ''], dtype=object)
array(['Castorina', 'P.', ''], dtype=object)
array(['Plumari', 'S.', ''], dtype=object)
array(["Zappala'", 'D.', ''], dtype=object)]
|
18,314 |
1906.08566
|
Daniel D. Scherer
|
Daniel D. Scherer, Brian M. Andersen
|
Effects of spin-orbit coupling on the neutron spin resonance in
iron-based superconductors
|
9+5 pages, 3 figures
| null | null |
NBI CMT 2019
|
cond-mat.supr-con cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The so-called neutron spin resonance consists of a prominent enhancement of
the magnetic response at a particular energy and momentum transfer upon
entering the superconducting state of unconventional superconductors. In the
case of iron-based superconductors, the neutron resonance has been extensively
studied experimentally, and a peculiar spin-space anisotropy has been
identified by polarized inelastic neutron scattering experiments. Here we
perform a theoretical study of the energy- and spin-resolved magnetic
susceptibility in the superconducting state with $ s_{+-} $-wave order
parameter, relevant to iron-pnictide and iron-chalcogenide superconductors. Our
model is based on a realistic bandstructure including spin-orbit coupling with
electronic Hubbard-Hund interactions included at the RPA level. Spin-orbit
coupling is taken into account both in the generation of spin-fluctuation
mediated pairing, as well as the numerical computation of the spin
susceptibility in the superconducting state. We find that spin-orbit coupling
and superconductivity in conjunction can reproduce the salient experimentally
observed features of the magnetic anisotropy of the neutron resonance. This
includes the possibility of a double resonance, the tendency for a $c$-axis
polarized resonance, and the existence of enhanced magnetic anisotropy upon
entering the superconducting phase.
|
[{'version': 'v1', 'created': 'Thu, 20 Jun 2019 11:47:58 GMT'}]
|
2019-06-21
|
[array(['Scherer', 'Daniel D.', ''], dtype=object)
array(['Andersen', 'Brian M.', ''], dtype=object)]
|
18,315 |
1212.5336
|
Colm Connaughton
|
Jamie Harris, Colm Connaughton and Miguel D. Bustamante
|
Percolation transition in the kinematics of nonlinear resonance
broadening in Charney-Hasegawa-Mima model of Rossby wave turbulence
|
10 pages, 9 figures
| null |
10.1088/1367-2630/15/8/083011
| null |
nlin.CD physics.ao-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the kinematics of nonlinear resonance broadening of interacting
Rossby waves as modelled by the Charney-Hasegawa-Mima equation on a biperiodic
domain. We focus on the set of wave modes which can interact quasi-resonantly
at a particular level of resonance broadening and aim to characterise how the
structure of this set changes as the level of resonance broadening is varied.
The commonly held view that resonance broadening can be thought of as a
thickening of the resonant manifold is misleading. We show that in fact the set
of modes corresponding to a single quasi-resonant triad has a nontrivial
structure and that its area in fact diverges for a finite degree of broadening.
We also study the connectivity of the network of modes which is generated when
quasi-resonant triads share common modes. This network has been argued to form
the backbone for energy transfer in Rossby wave turbulence. We show that this
network undergoes a percolation transition when the level of resonance
broadening exceeds a critical value. Below this critical value, the largest
connected component of the quasi-resonant network contains a negligible
fraction of the total number of modes in the system whereas above this critical
value a finite fraction of the total number of modes in the system are
contained in the largest connected component. We argue that this percolation
transition should correspond to the transition to turbulence in the system.
|
[{'version': 'v1', 'created': 'Fri, 21 Dec 2012 04:57:38 GMT'}]
|
2015-06-12
|
[array(['Harris', 'Jamie', ''], dtype=object)
array(['Connaughton', 'Colm', ''], dtype=object)
array(['Bustamante', 'Miguel D.', ''], dtype=object)]
|
18,316 |
1906.12141
|
Deok-Soo Kim PhD
|
Deok-Soo Kima, Joonghyun Ryua, Youngsong Choa, Mokwon Leeb, Jehyun
Cha, Chanyoung Song, Sangwha Kim, Roman A Laskowskid, Kokichi Sugihara, Jong
Bhak, Seong Eon Ryu
|
MGOS: A Library for Molecular Geometry and its Operating System
| null | null | null | null |
cs.CG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The geometry of atomic arrangement underpins the structural understanding of
molecules in many fields. However, no general framework of
mathematical/computational theory for the geometry of atomic arrangement
exists. Here we present "Molecular Geometry (MG)" as a theoretical framework
accompanied by "MG Operating System (MGOS)" which consists of callable
functions implementing the MG theory. MG allows researchers to model
complicated molecular structure problems in terms of elementary yet standard
notions of volume, area, etc. and MGOS frees them from the hard and tedious
task of developing/implementing geometric algorithms so that they can focus
more on their primary research issues. MG facilitates simpler modeling of
molecular structure problems; MGOS functions can be conveniently embedded in
application programs for the efficient and accurate solution of geometric
queries involving atomic arrangements. The use of MGOS in problems involving
spherical entities is akin to the use of math libraries in general purpose
programming languages in science and engineering.
|
[{'version': 'v1', 'created': 'Fri, 28 Jun 2019 11:34:09 GMT'}]
|
2019-07-01
|
[array(['Kima', 'Deok-Soo', ''], dtype=object)
array(['Ryua', 'Joonghyun', ''], dtype=object)
array(['Choa', 'Youngsong', ''], dtype=object)
array(['Leeb', 'Mokwon', ''], dtype=object)
array(['Cha', 'Jehyun', ''], dtype=object)
array(['Song', 'Chanyoung', ''], dtype=object)
array(['Kim', 'Sangwha', ''], dtype=object)
array(['Laskowskid', 'Roman A', ''], dtype=object)
array(['Sugihara', 'Kokichi', ''], dtype=object)
array(['Bhak', 'Jong', ''], dtype=object)
array(['Ryu', 'Seong Eon', ''], dtype=object)]
|
18,317 |
2004.05406
|
Hansol Park Mr
|
Seung-Yeal Ha and Hansol Park
|
Complete aggregation of the Lohe tensor model with the same free flow
| null | null |
10.1063/5.0007292
| null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Lohe tensor model is a first-order tensor-valued continuous-time model
for the aggregation of tensors with the same rank and size. It reduces to
well-known aggregation models such as the Kuramoto model, the Lohe sphere model
and the Lohe matrix model as special cases for low-rank tensors. We present a
sufficient and necessary framework for the solution splitting property(SSP) and
analyze two possible asymptotic states(completely aggregate state and bi-polar
state) which can emerge from a set of initial data. Moreover, we provide a
sufficient framework leading to the aforementioned two asymptotic states in
terms of initial data and system parameters.
|
[{'version': 'v1', 'created': 'Sat, 11 Apr 2020 14:03:50 GMT'}]
|
2020-10-28
|
[array(['Ha', 'Seung-Yeal', ''], dtype=object)
array(['Park', 'Hansol', ''], dtype=object)]
|
18,318 |
math/0608394
|
Naira Hovakimyan
|
Chengyu Cao and Naira Hovakimyan
|
Stability Margins of $\mathcal{L}_1$ Adaptive Controller: Part II
| null | null | null | null |
math.OC
| null |
In Part I of this paper, we have developed a novel $\mathcal{L}_1$ adaptive
control architecture that enables fast adaptation and leads to uniformly
bounded transient and asymptotic tracking for system's both signals, input and
output, simultaneously. In this paper, we derive the stability margins of
$\mathcal{L}_1$ adaptive control architecture, including time-delay and gain
margins in the presence of time-varying bounded disturbance.
Simulations verify the theoretical findings.
|
[{'version': 'v1', 'created': 'Tue, 15 Aug 2006 15:22:53 GMT'}]
|
2016-09-07
|
[array(['Cao', 'Chengyu', ''], dtype=object)
array(['Hovakimyan', 'Naira', ''], dtype=object)]
|
18,319 |
2004.12799
|
Suman Dutta
|
Suman Dutta
|
Dynamics of Interacting Hotspots -- I
| null | null |
10.13140/RG.2.2.12559.12966
| null |
physics.soc-ph q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The worldwide spread of COVID-19 has called for fast advancement of new
modelling strategies to estimate its unprecedented spread. Here, we introduce a
model based on the fundamental SIR equations with a stochastic disorder by a
random exchange of infected populations between cities to study dynamics in an
interacting network of epicentres in a model state. Although each stochastic
exchange conserves populations pair-wise, the disorder drives the global system
towards newer routes to dynamic equilibrium. Upon controlling the range of the
exchange fraction, we show that it is possible to control the heterogeneity in
the spread and the co-operativity among the interacting hotspots. Data of
collective temporal evolution of the infected populations in federal states of
Germany validate the qualitative features of the model.
|
[{'version': 'v1', 'created': 'Fri, 24 Apr 2020 15:57:31 GMT'}]
|
2020-04-28
|
[array(['Dutta', 'Suman', ''], dtype=object)]
|
18,320 |
2112.04898
|
Hassan Khandani
|
Hassan Khandani
|
A convergence condition for Newton-Raphson method
|
5 pages
| null | null | null |
math.GM
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper we study the convergence of Newton-Raphson method. For this
method there exists some convergence results which are practically not very
useful and just guarantee the convergence of this method when the first term of
this sequence is very close to the guessed root \cite{sulimayer}. Khandani et
al. introduced a new iterative method to estimate the roots of real-valued
functions \cite{khandani}. Using this method we introduce some simple and
easy-to-test conditions under which Newton-Raphson sequence converges to its
guessed root even when the initial point is chosen very far from this root.
More clearly, for a real-valued second differentiable function $f:[a,c]\to
\mathbb R$ with $f^{''}f\ge 0$ on $(a,c)$ where $c$ is the unique root of $f$
in $[a,c]$, the Newton-Raphson sequence $f$ converges to $c$ for each
$x_0\in[a,c]$ provided $f$ satisfies some other simple conditions on this
interval. A similar result holds if $[a,c]$ be replaced with $[c,b]$. Our study
will enable us to predict accurately where Newton-Raphson sequence converges.
|
[{'version': 'v1', 'created': 'Wed, 1 Dec 2021 18:30:57 GMT'}]
|
2021-12-10
|
[array(['Khandani', 'Hassan', ''], dtype=object)]
|
18,321 |
math/0701881
|
Hailong Dao
|
Hailong Dao
|
Some observations on local and projective hypersurfaces
| null | null | null | null |
math.AC math.AG
| null |
Let $R$ be a hypersurface in an equicharacteristic or unramified regular
local ring. For a pair of modules $(M,N)$ over $R$ we study applications of
rigidity of $\Tor^R(M,N)$, based on ideas by Huneke, Wiegand and Jorgensen. We
then focus on the hypersurfaces with isolated singularity and even dimension,
and show that modules over such rings behave very much like those over regular
local rings. Connections and applications to projective hypersurfaces such as
intersection dimension of subvarieties and cohomological criterion for
splitting of vector bundles are discussed.
|
[{'version': 'v1', 'created': 'Tue, 30 Jan 2007 14:29:12 GMT'}
{'version': 'v2', 'created': 'Sat, 8 Sep 2007 07:37:20 GMT'}]
|
2007-09-08
|
[array(['Dao', 'Hailong', ''], dtype=object)]
|
18,322 |
cond-mat/0406228
|
Bing Han
|
B. Han, B. W. Wessels, and M. P. Ulmer
|
Electronic states of Mn4+ ions in p-type GaN
|
Submitted to Appl. Phys. Lett
| null | null | null |
cond-mat.mtrl-sci
| null |
The electronic states of manganese in p-type GaN are investigated using
photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. A
series of sharp PL lines at 1.0 eV is observed in codoped GaN and attributed to
the intra d-shell transition 4T2(F)-4T1(F) of Mn4+ ions. PLE spectrum of the
Mn4+ [4T2(F)-4T1(F)] luminescence reveals intra-center excitation processes via
the excited states of Mn4+ ions. PLE peaks observed at 1.79 and 2.33 eV are
attributed to the intra d-shell 4T1(P)-4T1(F) and 4A2(F)-4T1(F) transitions of
Mn4+, respectively. In addition to the intra-shell excitation processes, a
broad PLE band involving charge-transfer transition of the Mn4+/3+ deep level
is observed, which is well described by the Lucovsky model. As determined from
the onset of this PLE band, the position of the Mn4+/3+ deep level is 1.11 eV
above the valence band maximum, which is consistent with prior theory using ab
initio calculations. Our work indicates 4+ is the predominant oxidation state
of Mn ions in p-type GaN:Mn when the Fermi energy is lower than 1.11 eV above
the valence band maximum.
|
[{'version': 'v1', 'created': 'Wed, 9 Jun 2004 22:37:00 GMT'}]
|
2007-05-23
|
[array(['Han', 'B.', ''], dtype=object)
array(['Wessels', 'B. W.', ''], dtype=object)
array(['Ulmer', 'M. P.', ''], dtype=object)]
|
18,323 |
hep-ph/0302059
|
Chuan Hung Chen
|
Chuan-Hung Chen
|
Evidence for two-quark content of $f_{0}(980)$ in exclusive $b\to c$
decays
|
4 pages, 2 figures, Revtex4, version to appear in PRD
|
Phys.Rev.D67:094011,2003
|
10.1103/PhysRevD.67.094011
| null |
hep-ph hep-ex
| null |
Inspired by a large decay branching ratio (BR) of $B^{+}\to f_{0}(980)K^{+}$
measured by Belle recently, we propose that a significant evidence of the
component of $n\bar{n}=(u\bar{u}+d\bar{d})/\sqrt{2}$ in $f_{0}(980)$ could be
demonstrated in exclusive $b\to c$ decays by the observation of $f_{0}(980)$ in
the final states $\bar{B}\to D^{0(*)} \pi^{+} \pi^{-}(KK)$ and $\bar{B}\to
J/\Psi \pi^{+} \pi^{-}(KK)$. We predict the BRs of $\bar{B}\to D^{0(*)}
(J/\Psi) f_{0}(980)$ to be ${\cal {O}}(10^{-4})$ (${\cal {O}}(10^{-5})$) while
the unknown wave functions of $D^{(*)0}$ ($J/\Psi$) are chosen to fit the
observed decays of $\bar{B}\to D^{(*)0} \pi^{0} (J/\Psi K^{0(*)})$.
|
[{'version': 'v1', 'created': 'Sat, 8 Feb 2003 04:51:26 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Mar 2003 05:34:07 GMT'}]
|
2008-11-26
|
[array(['Chen', 'Chuan-Hung', ''], dtype=object)]
|
18,324 |
2008.03412
|
Iacopo Masi
|
Iacopo Masi, Aditya Killekar, Royston Marian Mascarenhas, Shenoy
Pratik Gurudatt, Wael AbdAlmageed
|
Two-branch Recurrent Network for Isolating Deepfakes in Videos
|
To appear in the 16th European Conference on Computer Vision ECCV
2020 (added link to our demo and to the video presentation)
| null | null | null |
cs.CV cs.CY cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The current spike of hyper-realistic faces artificially generated using
deepfakes calls for media forensics solutions that are tailored to video
streams and work reliably with a low false alarm rate at the video level. We
present a method for deepfake detection based on a two-branch network structure
that isolates digitally manipulated faces by learning to amplify artifacts
while suppressing the high-level face content. Unlike current methods that
extract spatial frequencies as a preprocessing step, we propose a two-branch
structure: one branch propagates the original information, while the other
branch suppresses the face content yet amplifies multi-band frequencies using a
Laplacian of Gaussian (LoG) as a bottleneck layer. To better isolate
manipulated faces, we derive a novel cost function that, unlike regular
classification, compresses the variability of natural faces and pushes away the
unrealistic facial samples in the feature space. Our two novel components show
promising results on the FaceForensics++, Celeb-DF, and Facebook's DFDC preview
benchmarks, when compared to prior work. We then offer a full, detailed
ablation study of our network architecture and cost function. Finally, although
the bar is still high to get very remarkable figures at a very low false alarm
rate, our study shows that we can achieve good video-level performance when
cross-testing in terms of video-level AUC.
|
[{'version': 'v1', 'created': 'Sat, 8 Aug 2020 01:38:56 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Aug 2020 02:35:55 GMT'}
{'version': 'v3', 'created': 'Fri, 4 Sep 2020 01:03:55 GMT'}]
|
2020-09-07
|
[array(['Masi', 'Iacopo', ''], dtype=object)
array(['Killekar', 'Aditya', ''], dtype=object)
array(['Mascarenhas', 'Royston Marian', ''], dtype=object)
array(['Gurudatt', 'Shenoy Pratik', ''], dtype=object)
array(['AbdAlmageed', 'Wael', ''], dtype=object)]
|
18,325 |
0909.0782
|
Benoit Mosser
|
B. Mosser, T. Appourchaux
|
On detecting the large separation in the autocorrelation of stellar
oscillation times series
|
A&A, in press
| null |
10.1051/0004-6361/200912944
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The observations carried out by the space missions CoRoT and Kepler provide a
large set of asteroseismic data. Their analysis requires an efficient procedure
first to determine if the star is reliably showing solar-like oscillations,
second to measure the so-called large separation, third to estimate the
asteroseismic information that can be retrieved from the Fourier spectrum. We
develop in this paper a procedure, based on the autocorrelation of the seismic
Fourier spectrum. We have searched for criteria able to predict the output that
one can expect from the analysis by autocorrelation of a seismic time series.
First, the autocorrelation is properly scaled for taking into account the
contribution of white noise. Then, we use the null hypothesis H0 test to assess
the reliability of the autocorrelation analysis. Calculations based on solar
and CoRoT times series are performed in order to quantify the performance as a
function of the amplitude of the autocorrelation signal. We propose an
automated determination of the large separation, whose reliability is
quantified by the H0 test. We apply this method to analyze a large set of red
giants observed by CoRoT. We estimate the expected performance for photometric
time series of the Kepler mission. Finally, we demonstrate that the method
makes it possible to distinguish l=0 from l=1 modes. The envelope
autocorrelation function has proven to be very powerful for the determination
of the large separation in noisy asteroseismic data, since it enables us to
quantify the precision of the performance of different measurements: mean large
separation, variation of the large separation with frequency, small separation
and degree identification.
|
[{'version': 'v1', 'created': 'Fri, 4 Sep 2009 13:08:07 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Sep 2009 10:03:33 GMT'}
{'version': 'v3', 'created': 'Wed, 28 Oct 2009 10:47:45 GMT'}]
|
2015-05-14
|
[array(['Mosser', 'B.', ''], dtype=object)
array(['Appourchaux', 'T.', ''], dtype=object)]
|
18,326 |
1601.07588
|
Peter McGrath
|
Brian Freidin, Mamikon Gulian and Peter McGrath
|
Free Boundary Minimal Surfaces in the Unit Ball With Low Cohomogeneity
| null | null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study free boundary minimal surfaces in the unit ball of low
cohomogeneity. For each pair of positive integers $(m,n)$ such that $m, n >1$
and $m+n\geq 8$, we construct a free boundary minimal surface $\Sigma_{m, n}
\subset B^{m+n}$(1) invariant under $O(m)\times O(n)$. When $m+n<8$, an
instability of the resulting equation allows us to find an infinite family
$\{\Sigma_{m,n, k}\}_{k\in \mathbb{N}}$ of such surfaces. In particular,
$\{\Sigma_{2, 2, k}\}_{k\in \mathbb{N}}$ is a family of solid tori which
converges to the cone over the Clifford Torus as $k$ goes to infinity. These
examples indicate that a smooth compactness theorem for Free Boundary Minimal
Surfaces due to Fraser and Li does not generally extend to higher dimensions.
For each $n\geq 3$, we prove there is a unique nonplanar $SO(n)$-invariant
free boundary minimal surface (a "catenoid") $\Sigma_n \subset B^n(1)$. These
surfaces generalize the "critical catenoid" in $B^3(1)$ studied by Fraser and
Schoen.
|
[{'version': 'v1', 'created': 'Wed, 27 Jan 2016 22:40:25 GMT'}]
|
2016-01-29
|
[array(['Freidin', 'Brian', ''], dtype=object)
array(['Gulian', 'Mamikon', ''], dtype=object)
array(['McGrath', 'Peter', ''], dtype=object)]
|
18,327 |
0704.0938
|
Hui Wang
|
Hui Wang, Kipton Barros, Harvey Gould and W. Klein
|
Approaching equilibrium and the distribution of clusters
|
22 pages, 16 figures
|
Phys. Rev. E 76, 041116, 2007
|
10.1103/PhysRevE.76.041116
| null |
cond-mat.stat-mech cond-mat.other
| null |
We investigate the approach to stable and metastable equilibrium in Ising
models using a cluster representation. The distribution of nucleation times is
determined using the Metropolis algorithm and the corresponding $\phi^{4}$
model using Langevin dynamics. We find that the nucleation rate is suppressed
at early times even after global variables such as the magnetization and energy
have apparently reached their time independent values. The mean number of
clusters whose size is comparable to the size of the nucleating droplet becomes
time independent at about the same time that the nucleation rate reaches its
constant value. We also find subtle structural differences between the
nucleating droplets formed before and after apparent metastable equilibrium has
been established.
|
[{'version': 'v1', 'created': 'Fri, 6 Apr 2007 20:32:31 GMT'}
{'version': 'v2', 'created': 'Wed, 18 Apr 2007 14:39:10 GMT'}
{'version': 'v3', 'created': 'Wed, 13 Jun 2007 20:23:08 GMT'}
{'version': 'v4', 'created': 'Wed, 4 Jul 2007 18:28:59 GMT'}]
|
2007-10-26
|
[array(['Wang', 'Hui', ''], dtype=object)
array(['Barros', 'Kipton', ''], dtype=object)
array(['Gould', 'Harvey', ''], dtype=object)
array(['Klein', 'W.', ''], dtype=object)]
|
18,328 |
2008.02372
|
Amit Kumar Jaiswal
|
Amit Kumar Jaiswal, Haiming Liu, Ingo Frommholz
|
Reinforcement Learning-driven Information Seeking: A Quantum
Probabilistic Approach
|
Accepted in Proceedings of Bridging the Gap between Information
Science, Information Retrieval and Data Science (BIRDS) at SIGIR 2020
| null | null | null |
cs.IR cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Understanding an information forager's actions during interaction is very
important for the study of interactive information retrieval. Although
information spread in uncertain information space is substantially complex due
to the high entanglement of users interacting with information objects~(text,
image, etc.). However, an information forager, in general, accompanies a piece
of information (information diet) while searching (or foraging) alternative
contents, typically subject to decisive uncertainty. Such types of uncertainty
are analogous to measurements in quantum mechanics which follow the uncertainty
principle. In this paper, we discuss information seeking as a reinforcement
learning task. We then present a reinforcement learning-based framework to
model forager exploration that treats the information forager as an agent to
guide their behaviour. Also, our framework incorporates the inherent
uncertainty of the foragers' action using the mathematical formalism of quantum
mechanics.
|
[{'version': 'v1', 'created': 'Wed, 5 Aug 2020 21:33:51 GMT'}]
|
2020-08-07
|
[array(['Jaiswal', 'Amit Kumar', ''], dtype=object)
array(['Liu', 'Haiming', ''], dtype=object)
array(['Frommholz', 'Ingo', ''], dtype=object)]
|
18,329 |
0909.0136
|
Jacopo Bellazzini
|
Jacopo Bellazzini, Nicola Visciglia
|
Max-Min characterization of the mountain pass energy level for a class
of variational problems
| null | null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We provide a max-min characterization of the mountain pass energy level for a
family of variational problems. As a consequence we deduce the mountain pass
structure of solutions to suitable PDEs, whose existence follows from classical
minimization argument.
|
[{'version': 'v1', 'created': 'Tue, 1 Sep 2009 09:37:00 GMT'}]
|
2009-09-02
|
[array(['Bellazzini', 'Jacopo', ''], dtype=object)
array(['Visciglia', 'Nicola', ''], dtype=object)]
|
18,330 |
1212.5714
|
Christian Schnell
|
Mihnea Popa and Christian Schnell
|
Kodaira dimension and zeros of holomorphic one-forms
|
9 pages; final version, to appear in Ann. of Math
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that every holomorphic one-form on a smooth complex projective
variety of general type must vanish at some point. The proof uses generic
vanishing theory for Hodge D-modules on abelian varieties.
|
[{'version': 'v1', 'created': 'Sat, 22 Dec 2012 18:35:05 GMT'}
{'version': 'v2', 'created': 'Wed, 27 Nov 2013 21:51:59 GMT'}]
|
2013-12-02
|
[array(['Popa', 'Mihnea', ''], dtype=object)
array(['Schnell', 'Christian', ''], dtype=object)]
|
18,331 |
1707.04356
|
Dan Shaked Renous
|
Dan Shaked Renous, Arindam Roy, Amos Breskin and Shikma Bressler
|
Gain stabilization in Micro Pattern Gaseous Detectors: methodology and
results
| null | null |
10.1088/1748-0221/12/09/P09036
| null |
physics.ins-det
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The phenomenon of avalanche-gain variations over time, particularly in Micro
Pattern Gaseous Detectors (MPGD) incorporating insulator materials, have been
generally attributed to electric-field modifications resulting from
"charging-up" effects of the insulator. A robust methodology for
characterization of gain-transients in such detectors is presented. It
comprises three guidelines: detector initialization, long-gain stabilization
monitoring and imposing transients by applying abrupt changes in operation
conditions. Using THWELL and RPWELL detectors, we validated the proposed
methodology by assessing a charging-up/charging-down model describing the
governing processes of gain stabilization. The results provide a deeper insight
into these processes, reflected by different transients upon abrupt variations
of detector gain or the irradiation rate. This methodology provides a handle
for future investigations of the involved physics phenomena in MPGD detectors
comprising insulating components.
|
[{'version': 'v1', 'created': 'Thu, 13 Jul 2017 23:55:06 GMT'}
{'version': 'v2', 'created': 'Mon, 17 Jul 2017 06:56:23 GMT'}]
|
2017-10-25
|
[array(['Renous', 'Dan Shaked', ''], dtype=object)
array(['Roy', 'Arindam', ''], dtype=object)
array(['Breskin', 'Amos', ''], dtype=object)
array(['Bressler', 'Shikma', ''], dtype=object)]
|
18,332 |
1401.6635
|
Marcos Jardim
|
Marcos Jardim, Simone Marchesi, Anna Wi{\ss}dorf
|
Moduli of autodual instanton bundles
|
20 pages
|
Bull. Brazilian Math. Soc. 47 (2016), 823--843
|
10.1007/s00574-016-0114-5
| null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We provide a description of the moduli space of framed autodual instanton
bundles on projective space, focusing on the particular cases of symplectic and
orthogonal instantons. Our description will use the generalized ADHM equations
which define framed instanton sheaves.
|
[{'version': 'v1', 'created': 'Sun, 26 Jan 2014 10:43:18 GMT'}]
|
2016-11-09
|
[array(['Jardim', 'Marcos', ''], dtype=object)
array(['Marchesi', 'Simone', ''], dtype=object)
array(['Wißdorf', 'Anna', ''], dtype=object)]
|
18,333 |
1607.04281
|
Jaewon Song
|
Kazunobu Maruyoshi, Jaewon Song
|
N=1 Deformations and RG Flows of N=2 SCFTs
|
45 pages, v2: added a paragraph on SUSY enhancement from the index.
Minor corrections. To appear in JHEP
| null |
10.1007/JHEP02(2017)075
|
IMPERIAL-TP-16-KM-03
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study certain N=1 preserving deformations of four-dimensional N=2
superconformal field theories (SCFTs) with non-abelian flavor symmetry. The
deformation is described by adding an N=1 chiral multiplet transforming in the
adjoint representation of the flavor symmetry with a superpotential coupling,
and giving a nilpotent vacuum expectation value to the chiral multiplet which
breaks the flavor symmetry. This triggers a renormalization group flow to an
infrared SCFT. Remarkably, we find classes of theories flow to enhanced N=2
supersymmetric fixed points in the infrared under the deformation. They include
generalized Argyres-Douglas theories and rank-one SCFTs with non-abelian flavor
symmetries. Most notably, we find renormalization group flows from the deformed
conformal SQCDs to the $(A_1, A_n)$ Argyres-Douglas theories. From these
"Lagrangian descriptions," we compute the full superconformal indices of the
$(A_1, A_n)$ theories and find agreements with the previous results.
Furthermore, we study the cases, including the $T_N$ and $R_{0,N}$ theories of
class $\mathcal{S}$ and some of rank-one SCFTs, where the deformation gives
genuine N=1 fixed points.
|
[{'version': 'v1', 'created': 'Thu, 14 Jul 2016 20:00:02 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Feb 2017 21:58:56 GMT'}]
|
2017-03-08
|
[array(['Maruyoshi', 'Kazunobu', ''], dtype=object)
array(['Song', 'Jaewon', ''], dtype=object)]
|
18,334 |
1206.3723
|
Dong Lai
|
Dong Lai
|
DC Circuit Powered by Orbital Motion: Magnetic Interactions in Compact
Object Binaries and Exoplanetary Systems
|
5 pages, one figure
| null |
10.1088/2041-8205/757/1/L3
| null |
astro-ph.HE astro-ph.EP astro-ph.SR gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The unipolar induction DC circuit model, originally developed by Goldreich &
Lynden-Bell for the Jupiter-Io system, has been applied to different types of
binary systems in recent years. We show that there exists an upper limit to the
magnetic interaction torque and energy dissipation rate in such model. This
arises because when the resistance of the circuit is too small, the large
current flow severely twists the magnetic flux tube connecting the two binary
components, leading to breakdown of the circuit. Applying this limit, we find
that in coalescing neutron star binaries, magnetic interactions produce
negligible correction to the phase evolution of the gravitational waveform,
even for magnetar-like field strengths. However, energy dissipation in the
binary magnetosphere may still give rise to electromagnetic radiation prior to
the final merger. For ultra-compact white dwarf binaries, we find that DC
circuit does not provide adequate energy dissipation to explain the observed
X-ray luminosities of several sources. For exoplanetary systems containing
close-in Jupiters or super-Earths, magnetic torque and dissipation are
negligible, except possibly during the early T Tauri phase, when the stellar
magnetic field is stronger than 10^3G.
|
[{'version': 'v1', 'created': 'Sun, 17 Jun 2012 05:05:14 GMT'}]
|
2015-06-05
|
[array(['Lai', 'Dong', ''], dtype=object)]
|
18,335 |
1611.07088
|
Kevin McGown
|
Kevin J. McGown and Amanda Tucker
|
Statistics of genus numbers of cubic fields
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that approximately $96.23\%$ of cubic fields, ordered by
discriminant, have genus number one, and we compute the exact proportion of
cubic fields with a given genus number. We also compute the average genus
number. Finally, we show that a positive proportion of totally real cubic
fields with genus number one fail to be norm-Euclidean.
|
[{'version': 'v1', 'created': 'Mon, 21 Nov 2016 22:46:25 GMT'}
{'version': 'v2', 'created': 'Thu, 29 Dec 2016 22:46:51 GMT'}]
|
2017-01-02
|
[array(['McGown', 'Kevin J.', ''], dtype=object)
array(['Tucker', 'Amanda', ''], dtype=object)]
|
18,336 |
2210.14098
|
Chang-Hua Liu
|
Po-Liang Chen, Tian-Yun Chang, Pei-Sin Chen, Alvin Hsien-Yi Chan,
Adzilah Shahna Rosyadi, Yen-Ju Lin, Pei-Yu Huang, Jia-Xin Li, Wei-Qing Li,
Chia-Jui Hsu, Neil Na, Yao-Chang Lee, Ching-Hwa Ho, Chang-Hua Liu
|
Van der Waals heterostructure mid-infrared emitters with electrically
controllable polarization states and spectral characteristics
| null | null | null | null |
physics.optics cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Modern infrared (IR) microscopy, communication, and sensing systems demand
control of the spectral characteristics and polarization states of light.
Typically, these systems require the cascading of multiple filters,
polarization optics and rotating components to manipulate light, inevitably
increasing their sizes and complexities. Here, we report two-terminal
mid-infrared (mid-IR) emitters with electrically controllable spectral and
polarization properties. Our devices are composed of two back-to-back p-n
junctions formed by stacking anisotropic light-emitting materials, black
phosphorus and black arsenic-phosphorus with MoS2. By controlling the
crystallographic orientations and engineering the band profile of
heterostructures, the emissions of two junctions exhibit distinct spectral
ranges and polarization directions; more importantly, these two
electroluminescence (EL) units can be independently activated, depending on the
polarity of the applied bias. Furthermore, we show that when operating our
emitter under the polarity-switched pulse mode, its EL exhibits the
characteristics of broad spectral coverage, encompassing the entire first
mid-IR atmospheric window, and electrically tunable spectral shapes. Our
results provide the basis for developing groundbreaking technology in the field
of light emitters.
|
[{'version': 'v1', 'created': 'Tue, 25 Oct 2022 15:35:29 GMT'}]
|
2022-10-26
|
[array(['Chen', 'Po-Liang', ''], dtype=object)
array(['Chang', 'Tian-Yun', ''], dtype=object)
array(['Chen', 'Pei-Sin', ''], dtype=object)
array(['Chan', 'Alvin Hsien-Yi', ''], dtype=object)
array(['Rosyadi', 'Adzilah Shahna', ''], dtype=object)
array(['Lin', 'Yen-Ju', ''], dtype=object)
array(['Huang', 'Pei-Yu', ''], dtype=object)
array(['Li', 'Jia-Xin', ''], dtype=object)
array(['Li', 'Wei-Qing', ''], dtype=object)
array(['Hsu', 'Chia-Jui', ''], dtype=object)
array(['Na', 'Neil', ''], dtype=object)
array(['Lee', 'Yao-Chang', ''], dtype=object)
array(['Ho', 'Ching-Hwa', ''], dtype=object)
array(['Liu', 'Chang-Hua', ''], dtype=object)]
|
18,337 |
2305.00091
|
Ren-Cang Li
|
Ren-Cang Li
|
A Theory of the NEPv Approach for Optimization On the Stiefel Manifold
|
49 pages, 0 figures
| null | null | null |
math.OC
|
http://creativecommons.org/licenses/by/4.0/
|
The NEPv approach has been increasingly used lately for optimization on the
Stiefel manifold arising from machine learning. General speaking, the approach
first turns the first order optimality condition, also known as the KKT
condition, into a nonlinear eigenvalue problem with eigenvector dependency
(NEPv) or a nonlinear polar decomposition with orthogonal factor dependency
(NPDo) and then solve the nonlinear problem via some variations of the
self-consistent-field (SCF) iteration. The difficulty, however, lies in
designing a proper SCF iteration so that a maximizer is found at the end.
Currently, each use of the approach is very much individualized, especially in
its convergence analysis to show that the approach does work or otherwise. In
this paper, a unifying framework is established. The framework is built upon
some basic assumptions. If the basic assumptions are satisfied, globally
convergence is guaranteed to a stationary point and during the SCF iterative
process that leads to the stationary point, the objective function increases
monotonically. Also a notion of atomic functions is proposed, which include
commonly used matrix traces of linear and quadratic forms as special ones. It
is shown that the basic assumptions are satisfied by atomic functions and by
convex compositions of atomic functions. Together they provide a large
collection of objectives for which the NEPv/NPDo approach is guaranteed to
work.
|
[{'version': 'v1', 'created': 'Fri, 28 Apr 2023 21:04:59 GMT'}]
|
2023-05-02
|
[array(['Li', 'Ren-Cang', ''], dtype=object)]
|
18,338 |
1906.08498
|
Atanu Mondal
|
A. Deb Ray and Atanu Mondal
|
A $T_0$-Compactification Of A Tychonoff Space Using The Rings Of Baire
One Functions
|
This article has been superseded by arXiv:2003.12964. Please visit
that article for updates
| null | null | null |
math.GN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we continue our study of Baire one functions on a
topological space $X$, denoted by $B_1(X)$ and extend the well known M. H.
Stones's theorem from $C(X)$ to $B_1(X)$. Introducing the structure space of
$B_1(X)$, it is observed that $X$ may not be embedded inside this structure
space. This observation inspired us to build a space
$\mathcal{M}(B_1(X))/\sim$, from the structure space of $B_1(X)$ and to show
that $X$ is densely embedded in $\mathcal{M}(B_1(X))/\sim$. It is further
established that it is a $T_0$-compactification of $X$. Such compactification
of $X$ possesses the extension property for continuous functions, though it
lacks Hausdorffness in general. Therefore, it is natural to search for
condition(s) under which it becomes Hausdorff. In the last section, a set of
necessary and sufficient conditions for such compactification to become a
Stone-Ceck compatification, is finally arrived at.
|
[{'version': 'v1', 'created': 'Thu, 20 Jun 2019 08:28:24 GMT'}
{'version': 'v2', 'created': 'Fri, 29 May 2020 06:31:03 GMT'}
{'version': 'v3', 'created': 'Fri, 7 Jan 2022 09:39:34 GMT'}]
|
2022-01-10
|
[array(['Ray', 'A. Deb', ''], dtype=object)
array(['Mondal', 'Atanu', ''], dtype=object)]
|
18,339 |
1306.0419
|
Claus Leitherer
|
Claus Leitherer, Rupali Chandar, Christy Tremonti, Aida Wofford, and
Daniel Schaerer
|
Far-Ultraviolet Observations of Outflows from IR-Luminous Galaxies
|
71 pages, 26 figures, accepted by ApJ. arXiv admin note: text overlap
with arXiv:astro-ph/0502022 by other authors
| null |
10.1088/0004-637X/772/2/120
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We obtained medium-resolution ultraviolet (UV) spectra between 1150 and 1450
Angstroms of the four UV-bright, infrared (IR)-luminous starburst galaxies IRAS
F08339+6517, NGC 3256, NGC 6090, and NGC 7552 using the Cosmic Origins
Spectrograph onboard the Hubble Space Telescope. The selected sightlines
towards the starburst nuclei probe the properties of the recently formed
massive stars and the physical conditions in the starburst-driven galactic
superwinds. Despite being metal-rich and dusty, all four galaxies are strong
Lyman-alpha emitters with equivalent widths ranging between 2 and 13 Angstroms.
The UV spectra show strong P Cygni-type high-ionization features indicative of
stellar winds and blueshifted low-ionization lines formed in the interstellar
and circumgalactic medium. We detect outflowing gas with bulk velocities of
about 400 km/s and maximum velocities of almost 900 km/s. These are among the
highest values found in the local universe and comparable to outflow velocities
found in luminous Lyman-break galaxies at intermediate and high redshift. The
outflow velocities are unlikely to be high enough to cause escape of material
from the galactic gravitational potential. However, the winds are significant
for the evolution of the galaxies by transporting heavy elements from the
starburst nuclei and enriching the galaxy halos. The derived mass outflow rates
of ~100 Msol/yr are comparable to, or even higher than the star-formation
rates. The outflows can quench star formation and ultimately regulate the
starburst as has been suggested for high-redshift galaxies.
|
[{'version': 'v1', 'created': 'Mon, 3 Jun 2013 14:08:39 GMT'}]
|
2015-06-16
|
[array(['Leitherer', 'Claus', ''], dtype=object)
array(['Chandar', 'Rupali', ''], dtype=object)
array(['Tremonti', 'Christy', ''], dtype=object)
array(['Wofford', 'Aida', ''], dtype=object)
array(['Schaerer', 'Daniel', ''], dtype=object)]
|
18,340 |
1910.10496
|
Carlos Alberto Parra Murillo Parra-Murillo
|
Carlos A. Parra-Murillo, Max Bramberger, Claudius Hubig, and In\'es de
Vega
|
Open quantum systems in thermal non-ergodic environments
|
4 pages, 1 figure, plus suplementary material
|
Phys. Rev. A 103, 032204 (2021)
|
10.1103/PhysRevA.103.032204
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The dynamics of an open system crucially depends on the correlation function
of its environment, $C_B(t)$. We show that for thermal non-Harmonic
environments $C_B(t)$ may not decay to zero but to an offset, $C_0>0$. The
presence of such offset is determined by the environment eigenstate structure,
and whether it fulfills or not the eigenstate thermalization hypothesis.
Moreover, we show that a $C_0>0$ could render the weak coupling approximation
inaccurate and prevent the open system to thermalize. Finally, for a realistic
environment of dye molecules, we show the emergence of the offset by using
matrix product states (MPS), and discuss its link to a 1/f noise spectrum that,
in contrast to previous models, extends to zero frequencies. Thus, our results
may be relevant in describing dissipation in quantum technological devices like
superconducting qubits, which are known to be affected by such noise.
|
[{'version': 'v1', 'created': 'Wed, 23 Oct 2019 11:59:43 GMT'}]
|
2021-03-10
|
[array(['Parra-Murillo', 'Carlos A.', ''], dtype=object)
array(['Bramberger', 'Max', ''], dtype=object)
array(['Hubig', 'Claudius', ''], dtype=object)
array(['de Vega', 'Inés', ''], dtype=object)]
|
18,341 |
1512.00817
|
Jorge S. Diaz
|
J.S. Diaz, F.R. Klinkhamer
|
Neutrino refraction by the cosmic neutrino background
|
12 pages, v3: published version
|
Phys. Rev. D 93, 053004 (2016)
|
10.1103/PhysRevD.93.053004
|
KA-TP-23-2015
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have determined the dispersion relation of a neutrino test particle
propagating in the cosmic neutrino background. Describing the relic neutrinos
and antineutrinos from the hot big bang as a dense medium, a matter potential
or refractive index is obtained. The vacuum neutrino mixing angles are
unchanged, but the energy of each mass state is modified. Using a matrix in the
space of neutrino species, the induced potential is decomposed into a part
which produces signatures in beta-decay experiments and another part which
modifies neutrino oscillations. The low temperature of the relic neutrinos
makes a direct detection extremely challenging. From a different point of view,
the identified refractive effects of the cosmic neutrino background constitute
an ultralow background for future experimental studies of nonvanishing Lorentz
violation in the neutrino sector.
|
[{'version': 'v1', 'created': 'Wed, 2 Dec 2015 19:32:12 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Dec 2015 19:56:02 GMT'}
{'version': 'v3', 'created': 'Mon, 7 Mar 2016 20:33:56 GMT'}]
|
2016-03-09
|
[array(['Diaz', 'J. S.', ''], dtype=object)
array(['Klinkhamer', 'F. R.', ''], dtype=object)]
|
18,342 |
0908.2356
|
Stephen Fairhurst
|
Stephen Fairhurst
|
Triangulation of gravitational wave sources with a network of detectors
|
20 pages, 5 figures
|
New J.Phys.11:123006,2009; Erratum-ibid.13:069602,2011
|
10.1088/1367-2630/11/12/123006 10.1088/1367-2630/13/6/069602
| null |
gr-qc astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There is significant benefit to be gained by pursuing multi-messenger
astronomy with gravitational wave and electromagnetic observations. In order to
undertake electromagnetic follow-ups of gravitational wave signals, it will be
necessary to accurately localize them in the sky. Since gravitational wave
detectors are not inherently pointing instruments, localization will occur
primarily through triangulation with a network of detectors. We investigate the
expected timing accuracy for observed signals and the consequences for
localization. In addition, we discuss the effect of systematic uncertainties in
the waveform and calibration of the instruments on the localization of sources.
We provide illustrative results of timing and localization accuracy as well as
systematic effects for coalescing binary waveforms.
|
[{'version': 'v1', 'created': 'Mon, 17 Aug 2009 13:34:23 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Dec 2009 14:01:30 GMT'}]
|
2011-07-06
|
[array(['Fairhurst', 'Stephen', ''], dtype=object)]
|
18,343 |
hep-th/0507009
|
Vasiliy Kuratov
|
N. A. Gromov, V. V. Kuratov
|
Noncommutative space-time models
|
8 pages; talk given at XIV International Colloquium of Integrable
Systems, Prague, June 16-18, 2005
|
Czech.J.Phys. 55 (2005) 1421-1426
|
10.1007/s10582-006-0020-y
| null |
hep-th
| null |
The FRT quantum Euclidean spaces $O_q^N$ are formulated in terms of Cartesian
generators. The quantum analogs of N-dimensional Cayley-Klein spaces are
obtained by contractions and analytical continuations. Noncommutative constant
curvature spaces are introduced as a spheres in the quantum Cayley-Klein
spaces. For N=5 part of them are interpreted as the noncommutative analogs of
(1+3) space-time models. As a result the quantum (anti) de Sitter, Newton,
Galilei kinematics with the fundamental length and the fundamental time are
suggested.
|
[{'version': 'v1', 'created': 'Fri, 1 Jul 2005 10:52:23 GMT'}]
|
2009-11-11
|
[array(['Gromov', 'N. A.', ''], dtype=object)
array(['Kuratov', 'V. V.', ''], dtype=object)]
|
18,344 |
1003.3575
|
Francis Bernardeau
|
Francis Bernardeau (IPhT Saclay)
|
Mode coupling evolution in arbitrary inflationary backgrounds
|
22 pages, 5 figures. Revised version with correction of typos and
more detailed discussions on the validity regime of the calculations
|
JCAP 1102:017,2011
|
10.1088/1475-7516/2011/02/017
|
T10/114
|
astro-ph.CO gr-qc hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The evolution of high order correlation functions of a test scalar field in
arbitrary inflationary backgrounds is computed. Whenever possible, exact
results are derived from quantum field theory calculations. Taking advantage of
the fact that such calculations can be mapped, for super-horizon scales, into
those of a classical system, we express the expected correlation functions in
terms of classical quantities, power spectra, Green functions, that can be
easily computed in the long-wavelength limit. Explicit results are presented
that extend those already known for a de Sitter background. In particular the
expressions of the late time amplitude of bispectrum and trispectrum, as well
as the whole high-order correlation structure, are given in terms of the
expansion factor behavior. When compared to the case of a de Sitter background,
power law inflation and chaotic inflation induced by a massive field are found
to induce high order correlation functions the amplitudes of which are
amplified by almost one order of magnitude. These results indicate that the
dependence of the related non-Gaussian parameters - such as f_NL - on the
wave-modes is at percent level.
|
[{'version': 'v1', 'created': 'Thu, 18 Mar 2010 13:05:45 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Nov 2010 10:32:35 GMT'}]
|
2011-03-18
|
[array(['Bernardeau', 'Francis', '', 'IPhT Saclay'], dtype=object)]
|
18,345 |
1402.0333
|
Jose Maria Grau
|
Pedro Fortuny Ayuso, Jose Maria Grau and Antonio Oller-Marcen
|
A von Staudt-type formula for $\displaystyle{\sum_{z\in\mathbb{Z}_n[i]}
z^k }$
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we study the sum of powers in the Gaussian integers
$\mathbf{G}_k(n):=\sum_{a,b \in [1,n]} (a+b i)^k$. We give an explicit formula
for $\mathbf{G}_k(n) \pmod n $ in terms of the prime numbers $p \equiv 3 \pmod
4$ with $p \mid \mid n$ and $p-1 \mid k$, similar to the well known one due to
von Staudt for $\sum_{i=1}^n i^k \pmod n$. We apply this formula to study the
set of integers $n$ which divide $\mathbf{G}_n(n)$ and compute its asymptotic
density with six exact digits: $0.971000\ldots$.
|
[{'version': 'v1', 'created': 'Mon, 3 Feb 2014 10:27:19 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Feb 2014 06:40:29 GMT'}]
|
2014-02-05
|
[array(['Ayuso', 'Pedro Fortuny', ''], dtype=object)
array(['Grau', 'Jose Maria', ''], dtype=object)
array(['Oller-Marcen', 'Antonio', ''], dtype=object)]
|
18,346 |
1503.09138
|
Leonid Rokhinson
|
Zhong Wan, Aleksandr Kazakov, Michael J. Manfra, Loren N. Pfeiffer,
Ken W. West, and Leonid P. Rokhinson
|
Induced superconductivity in high mobility two dimensional electron gas
in GaAs heterostructures
|
11 pages, 7 figures
| null |
10.1038/ncomms8426
| null |
cond-mat.mes-hall cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Introduction of a Josephson field effect transistor (JoFET) concept sparked
active research on proximity effects in semiconductors. Induced
superconductivity and electrostatic control of critical current has been
demonstrated in two-dimensional gases in InAs, graphene and topological
insulators, and in one-dimensional systems including quantum spin Hall edges.
Recently, interest in superconductor-semiconductor interfaces was renewed by
the search for Majorana fermions, which were predicted to reside at the
interface. More exotic non-Abelian excitations, such as parafermions
(fractional Majorana fermions) or Fibonacci fermions may be formed when
fractional quantum Hall edge states interface with superconductivity. In this
paper we develop transparent superconducting contacts to high mobility
two-dimensional electron gas (2DEG) in GaAs and demonstrate induced
superconductivity across several microns. Supercurrent in a ballistic junction
has been observed across 0.6 $\mu$m of 2DEG, a regime previously achieved only
in point contacts but essential to the formation of well separated non-Abelian
states. High critical fields ($>16$ Tesla) in NbN contacts enables
investigation of a long-sought regime of an interplay between superconductivity
and strongly correlated states in a 2DEG at high magnetic fields.
|
[{'version': 'v1', 'created': 'Tue, 31 Mar 2015 17:32:15 GMT'}]
|
2019-06-26
|
[array(['Wan', 'Zhong', ''], dtype=object)
array(['Kazakov', 'Aleksandr', ''], dtype=object)
array(['Manfra', 'Michael J.', ''], dtype=object)
array(['Pfeiffer', 'Loren N.', ''], dtype=object)
array(['West', 'Ken W.', ''], dtype=object)
array(['Rokhinson', 'Leonid P.', ''], dtype=object)]
|
18,347 |
1804.10485
|
Haifeng Wang
|
Hai-Feng Wang, Chao Liu, Yan Xu, Jun-Chen Wan, and Licai Deng
|
Mapping the Milky Way with LAMOST III: Complicated spatial structure in
the outer disc
|
15 pages, 12 figures, accepted by MNRAS
| null |
10.1093/mnras/sty1058
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present {complexity} of the Galactic outer disc {by fitting the stellar
volume densities of the red giant branch stars with a two-disc component
model}. {The discs are confirmed to} extend to $R\sim19$\,kpc. The radial
density profile of the discs shows {two breaks at $R\sim11$ and $\sim14$\,kpc,
respectively, which} separate the radial profile into three segments with
different scale lengths of $2.12\pm0.26$, $1.18\pm0.08$, and $2.72$\,kpc at
$R<11$, $11\leq R\leq14$, and $R>14$\,kpc, respectively. The first {break} is
likely due to the sudden drop in the radial profile of the thin disc, which may
be an evidence of the radial migration. {Beyond $14$\,kpc, the thick disc
becomes prominent and the transition from thin to thick disc leads to the
second break.} This implies that the geometrically defined thick disc is more
{radially} extended than the thin disc. This is also supported by the larger
scale length of the thick disc than that of the thin disc. Meanwhile, {the
scale height of the thicker component increases from $0.637_{-0.036}^{+0.056}$
at $R=8$ to $1.284_{-0.079}^{+0.086}$\,kpc at $R=19$\,kpc, showing an intensive
flared disc}. Moreover, rich substructures are displayed in the residuals of
the stellar density. Among them, the substructures $D14+2.0$ and $O14-1.5$ show
a north-south asymmetry, which can be essentially explained by southward
shifting of the thick disc. However, no significant overdensity is found for
the Monoceros ring. Finally, the thick disc shows a ripple-like feature with
unclear origin at $9<R<10.5$\,kpc.
|
[{'version': 'v1', 'created': 'Fri, 27 Apr 2018 13:11:21 GMT'}]
|
2018-07-04
|
[array(['Wang', 'Hai-Feng', ''], dtype=object)
array(['Liu', 'Chao', ''], dtype=object)
array(['Xu', 'Yan', ''], dtype=object)
array(['Wan', 'Jun-Chen', ''], dtype=object)
array(['Deng', 'Licai', ''], dtype=object)]
|
18,348 |
2302.14067
|
Ilia Khait
|
Ilia Khait, Edwin Tham, Dvira Segal, Aharon Brodutch
|
Variational Quantum Eigensolvers in the Era of Distributed Quantum
Computers
|
4.5 pages + SI. Comment are welcomed
| null | null | null |
quant-ph cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The computational power of a quantum computer is limited by the number of
qubits available for information processing. Increasing this number within a
single device is difficult; it is widely accepted that distributed modular
architectures are the solution to large scale quantum computing. The major
challenge in implementing such architectures is the need to exchange quantum
information between modules. In this work, we show that a distributed quantum
computing architecture with {\it limited} capacity to exchange information
between modules can accurately solve quantum computational problems. Using the
example of a variational quantum eignesolver with an ansatz designed for a
two-module (dual-core) architecture, we show that three inter-module operations
provide a significant advantage over no inter-module (or serially executed)
operations. These results provide a strong indication that near-term {\it
modular} quantum processors can be an effective alternative to their monolithic
counterparts.
|
[{'version': 'v1', 'created': 'Mon, 27 Feb 2023 19:00:01 GMT'}]
|
2023-03-01
|
[array(['Khait', 'Ilia', ''], dtype=object)
array(['Tham', 'Edwin', ''], dtype=object)
array(['Segal', 'Dvira', ''], dtype=object)
array(['Brodutch', 'Aharon', ''], dtype=object)]
|
18,349 |
2108.10423
|
Hanshen Xiao
|
Hanshen Xiao, Yaowen Zhang, and Guoqiang Xiao
|
On the Foundation of Sparse Sensing (Part I): Necessary and Sufficient
Sampling Theory and Robust Remaindering Problem
| null | null | null | null |
cs.IT math.IT
|
http://creativecommons.org/licenses/by/4.0/
|
In the first part of the series papers, we set out to answer the following
question: given specific restrictions on a set of samplers, what kind of signal
can be uniquely represented by the corresponding samples attained, as the
foundation of sparse sensing. It is different from compressed sensing, which
exploits the sparse representation of a signal to reduce sample complexity
(compressed sampling or acquisition). We use sparse sensing to denote a board
concept of methods whose main focus is to improve the efficiency and cost of
sampling implementation itself. The "sparse" here is referred to sampling at a
low temporal or spatial rate (sparsity constrained sampling or acquisition),
which in practice models cheaper hardware such as lower power, less memory and
throughput.
We take frequency and direction of arrival (DoA) estimation as concrete
examples and give the necessary and sufficient requirements of the sampling
strategy. Interestingly, we prove that these problems can be reduced to some
(multiple) remainder model. As a straightforward corollary, we supplement and
complete the theory of co-prime sampling, which receives considerable attention
over last decade.
On the other hand, we advance the understanding of the robust multiple
remainder problem, which models the case when sampling with noise. A sharpened
tradeoff between the parameter dynamic range and the error bound is derived. We
prove that, for N-frequency estimation in either complex or real waveforms,
once the least common multiple (lcm) of the sampling rates selected is
sufficiently large, one may approach an error tolerance bound independent of N.
|
[{'version': 'v1', 'created': 'Mon, 23 Aug 2021 21:41:04 GMT'}]
|
2021-08-25
|
[array(['Xiao', 'Hanshen', ''], dtype=object)
array(['Zhang', 'Yaowen', ''], dtype=object)
array(['Xiao', 'Guoqiang', ''], dtype=object)]
|
18,350 |
1607.00929
|
Alberto Saldana
|
Nicola Abatangelo, Sven Jarohs, Alberto Salda\~na
|
On the maximum principle for higher-order fractional Laplacians
|
Revised version
| null |
10.1016/j.na.2018.05.019 10.1090/proc/14165
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study existence, regularity, and qualitative properties of solutions to
linear problems involving higher-order fractional Laplacians $(-\Delta)^s$ for
any $s>1$. Using the nonlocal properties of these operators, we provide an
explicit counterexample to general maximum principles for $s\in(n,n+1)$ with
$n\in\mathbb N$ odd; moreover, using a representation formula for solutions, we
derive regularity and positivity preserving properties whenever the domain is
the whole space or a ball. In the case of the whole space we analyze the Riesz
kernel, which provides a fundamental solution, while in the case of the ball we
show the validity of Boggio's representation formula for all integer and
fractional powers of the Laplacian $s>0$. Our proofs rely on characterizations
of $s$-harmonic functions using higher-order Martin kernels, on a decomposition
of Boggio's formula, and on elliptic regularity theory.
|
[{'version': 'v1', 'created': 'Mon, 4 Jul 2016 15:27:31 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Dec 2016 13:18:31 GMT'}
{'version': 'v3', 'created': 'Mon, 17 Sep 2018 14:38:37 GMT'}]
|
2018-09-18
|
[array(['Abatangelo', 'Nicola', ''], dtype=object)
array(['Jarohs', 'Sven', ''], dtype=object)
array(['Saldaña', 'Alberto', ''], dtype=object)]
|
18,351 |
1903.09184
|
Christian Caama\~no
|
Christian Caama\~no Carrillo and Sergio Contreras
|
Estimating the three-month series of the Chilean Gross Domestic Product
|
14 pages and 4 figures
| null | null | null |
stat.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper the methodology proponed by Cerqueira et al, 2008; is applied
to estimate the three-month series of the Chilean Gross Domestic Product (GDP)
in the period composed between 1965 and 2009. In First place, the equation of
Engle- Granger is estimated using the data of the yearly GPD and related
variables. The estimated coeffcients of this regression are used to obtain a
First estimation of the three-month GDP with measurements errors. Then a State
Space model is estimated through Benchmarking in order to improve the
preliminary estimation of the GDP with the purpose of eliminating the maximum
error of measurement and in order that the sum of the three-month values
coincide with the yearly GDP.
|
[{'version': 'v1', 'created': 'Thu, 21 Mar 2019 18:35:11 GMT'}]
|
2019-03-25
|
[array(['Carrillo', 'Christian Caamaño', ''], dtype=object)
array(['Contreras', 'Sergio', ''], dtype=object)]
|
18,352 |
1601.07301
|
Hirokazu Nasu
|
Hirokazu Nasu
|
Obstructions to deforming curves on a 3-fold, III: Deformations of
curves lying on a K3 surface
|
This is a postprint of an article published in Internat. J. Math.
(IJM) with DOI below. This version makes a correction to Theorem 3.3 of the
previous version on the arXiv, as well as to the version in IJM, in which we
have made a mistake in calculations and the theorem does not hold as it
stands. In this version we make a reformulation of the theorem (Theorem 3.3)
|
Internat. J. Math. 28 (2017), no. 13, 1750099, 30 pp
|
10.1142/S0129167X17500999
| null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the deformations of a smooth curve $C$ on a smooth projective
threefold $V$, assuming the presence of a smooth surface $S$ satisfying $C
\subset S \subset V$. Generalizing a result of Mukai and Nasu, we give a new
sufficient condition for a first order infinitesimal deformation of $C$ in $V$
to be primarily obstructed. In particular, when $V$ is Fano and $S$ is $K3$, we
give a sufficient condition for $C$ to be (un)obstructed in $V$, in terms of
$(-2)$-curves and elliptic curves on $S$. Applying this result, we prove that
the Hilbert scheme $\operatorname{Hilb}^{sc} V_4$ of smooth connected curves on
a smooth quartic threefold $V_4$ contains infinitely many generically
non-reduced irreducible components, which are variations of Mumford's example
for $\operatorname{Hilb}^{sc} \mathbb P^3$.
|
[{'version': 'v1', 'created': 'Wed, 27 Jan 2016 09:37:38 GMT'}
{'version': 'v2', 'created': 'Wed, 1 Nov 2017 07:17:48 GMT'}
{'version': 'v3', 'created': 'Mon, 9 Sep 2019 11:24:51 GMT'}]
|
2019-09-10
|
[array(['Nasu', 'Hirokazu', ''], dtype=object)]
|
18,353 |
hep-th/9906230
|
Thomas Strobl
|
Thomas Strobl
|
Target-Superspace in 2d Dilatonic Supergravity
|
6 pages, Latex, to be published in PLB
|
Phys.Lett. B460 (1999) 87-93
|
10.1016/S0370-2693(99)00649-8
|
PITHA-99/22
|
hep-th gr-qc
| null |
The N=1 supersymmetric version of generalized 2d dilaton gravity can be cast
into the form of a Poisson Sigma Model, where the target space and its Poisson
bracket are graded. The target space consists of a 1+1 superspace and the
dilaton, which is the generator of Lorentz boosts therein. The Poisson bracket
on the target space induces the invariance of the worldsheet theory against
both diffeomorphisms and local supersymmetry transformations
(superdiffeomorphisms). The machinery of Poisson Sigma Models is then used to
find the general local solution to the field equations. As a byproduct,
classical equivalence between the bosonic theory and its supersymmetric
extension is found.
|
[{'version': 'v1', 'created': 'Tue, 29 Jun 1999 13:26:04 GMT'}]
|
2009-10-31
|
[array(['Strobl', 'Thomas', ''], dtype=object)]
|
18,354 |
1906.02599
|
Dmitry Kulyabov
|
D. S. Kulyabov, A. V. Korolkova, and L. A. Sevastianov
|
New Features in the Second Version of the Cadabra Computer Algebra
System
|
in English; in Russian
| null |
10.1134/S0361768819020063
| null |
cs.SC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In certain scientific domains, there is a need for tensor operations. To
facilitate tensor computations,computer algebra systems are employed. In our
research, we have been using Cadabra as the main computer algebra system for
several years. Recently, an operable second version of this software was
released. In this version, a number of improvements were made that can be
regarded as revolutionary ones. The most significant improvements are the
implementation of component computations and the change in the ideology of the
Cadabra's software mechanism as compared to the first version. This paper
provides a brief overview of the key improvements in the Cadabra system.
|
[{'version': 'v1', 'created': 'Thu, 6 Jun 2019 14:12:05 GMT'}]
|
2019-06-07
|
[array(['Kulyabov', 'D. S.', ''], dtype=object)
array(['Korolkova', 'A. V.', ''], dtype=object)
array(['Sevastianov', 'L. A.', ''], dtype=object)]
|
18,355 |
1809.02167
|
Giulio Romualdi
|
Giulio Romualdi, Stefano Dafarra, Yue Hu, Daniele Pucci
|
A Benchmarking of DCM Based Architectures for Position and Velocity
Controlled Walking of Humanoid Robots
|
Submitted to Humanoids2018
|
2018 IEEE-RAS 18th International Conference on Humanoid Robots
(Humanoids)
|
10.1109/HUMANOIDS.2018.8625025
| null |
cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper contributes towards the development and comparison of
Divergent-Component-of-Motion (DCM) based control architectures for humanoid
robot locomotion. More precisely, we present and compare several DCM based
implementations of a three layer control architecture. From top to bottom,
these three layers are here called: trajectory optimization, simplified model
control, and whole-body QP control. All layers use the DCM concept to generate
references for the layer below. For the simplified model control layer, we
present and compare both instantaneous and Receding Horizon Control
controllers. For the whole-body QP control layer, we present and compare
controllers for position and velocity control robots. Experimental results are
carried out on the one-meter tall iCub humanoid robot. We show which
implementation of the above control architecture allows the robot to achieve a
walking velocity of 0.41 meters per second.
|
[{'version': 'v1', 'created': 'Thu, 6 Sep 2018 18:43:32 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Nov 2018 13:34:53 GMT'}]
|
2019-11-28
|
[array(['Romualdi', 'Giulio', ''], dtype=object)
array(['Dafarra', 'Stefano', ''], dtype=object)
array(['Hu', 'Yue', ''], dtype=object)
array(['Pucci', 'Daniele', ''], dtype=object)]
|
18,356 |
1605.00771
|
Ralf-Arno Tripolt
|
Ralf-Arno Tripolt, Lorenz von Smekal, Jochen Wambach
|
Spectral functions and in-medium properties of hadrons
|
Contribution to the Gerry Brown memorial book published by World
Scientific
| null |
10.1142/S0218301317400286
| null |
hep-ph hep-th nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The in-medium modifications of hadron properties such as masses and decay
widths have been a major focus of the scientific work of Gerry Brown and the
insights gained by him and his collaborators made them major drivers of this
field for several decades. Their prediction of experimental signals in
di-lepton pair production in relativistic heavy-ion collisions were
instrumental in initiating large experimental campaigns which continue until
today. In this chapter we review recent results which elucidate the relation of
hadronic spectral properties at finite temperature and density to the
restoration of spontaneously broken chiral symmetry.
|
[{'version': 'v1', 'created': 'Tue, 3 May 2016 07:48:57 GMT'}]
|
2017-03-08
|
[array(['Tripolt', 'Ralf-Arno', ''], dtype=object)
array(['von Smekal', 'Lorenz', ''], dtype=object)
array(['Wambach', 'Jochen', ''], dtype=object)]
|
18,357 |
2011.12806
|
Eduardo de Souza B\"oer
|
Eduardo de Souza B\"oer and Ol\'impio H. Miyagaki
|
The Choquard logarithmic equation involving fractional Laplacian
operator and a nonlinearity with exponential critical growth
|
26 pages. arXiv admin note: text overlap with arXiv:2011.01260
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the present work we investigate the existence and multiplicity of
nontrivial solutions for the Choquard Logarithmic equation
$(-\Delta)^{\frac{1}{2}} u + au + \lambda (\ln|\cdot|\ast |u|^{2})u = f(u)
\textrm{ in } \mathbb{R}$, for $ a>0 $, $ \lambda >0 $ and a nonlinearity $f$
with exponential critical growth. We prove the existence of a nontrivial
solution at the mountain pass level and a nontrivial ground state solution
under exponential critical and subcritical growth. Morever, when $ f $ has
subcritical growth we guarantee the existence of infinitely many solutions, via
genus theory.
|
[{'version': 'v1', 'created': 'Wed, 25 Nov 2020 15:07:51 GMT'}
{'version': 'v2', 'created': 'Fri, 18 Dec 2020 18:43:13 GMT'}]
|
2020-12-21
|
[array(['Böer', 'Eduardo de Souza', ''], dtype=object)
array(['Miyagaki', 'Olímpio H.', ''], dtype=object)]
|
18,358 |
0909.0035
|
Oldrich Spacil
|
Oldrich Spacil
|
Indices of quaternionic complexes
|
14 pages
|
Diff. Geom. and its Appl. 28 (2010) , 395-405
|
10.1016/j.difgeo.2010.04.002
| null |
math.GT math.DG
|
http://creativecommons.org/licenses/by/3.0/
|
Methods of parabolic geometries have been recently used to construct a class
of elliptic complexes on quaternionic manifolds, the Salamon's complex being
the simplest case. The purpose of this paper is to describe an algorithm how to
compute their analytical indices in terms of characteristic classes. Using
this, we are able to derive some topological obstructions to existence of
quaternionic structures on manifolds.
|
[{'version': 'v1', 'created': 'Mon, 31 Aug 2009 21:13:56 GMT'}]
|
2010-08-02
|
[array(['Spacil', 'Oldrich', ''], dtype=object)]
|
18,359 |
1902.07037
|
Martina McMenamin
|
Martina McMenamin, Jessica K. Barrett, Anna Berglind, James M.S. Wason
|
Employing latent variable models to improve efficiency in composite
endpoint analysis
|
44 pages, 12 figures
| null | null | null |
stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Composite endpoints that combine multiple outcomes on different scales are
common in clinical trials, particularly in chronic conditions. In many of these
cases, patients will have to cross a predefined responder threshold in each of
the outcomes to be classed as a responder overall. One instance of this occurs
in systemic lupus erythematosus (SLE), where the responder endpoint combines
two continuous, one ordinal and one binary measure. The overall binary
responder endpoint is typically analysed using logistic regression, resulting
in a substantial loss of information. We propose a latent variable model for
the SLE endpoint, which assumes that the discrete outcomes are manifestations
of latent continuous measures and can proceed to jointly model the components
of the composite. We perform a simulation study and find the method to offer
large efficiency gains over the standard analysis. We find that the magnitude
of the precision gains are highly dependent on which components are driving
response. Bias is introduced when joint normality assumptions are not
satisfied, which we correct for using a bootstrap procedure. The method is
applied to the Phase IIb MUSE trial in patients with moderate to severe SLE. We
show that it estimates the treatment effect 2.5 times more precisely, offering
a 60% reduction in required sample size.
|
[{'version': 'v1', 'created': 'Tue, 19 Feb 2019 13:10:17 GMT'}]
|
2019-02-20
|
[array(['McMenamin', 'Martina', ''], dtype=object)
array(['Barrett', 'Jessica K.', ''], dtype=object)
array(['Berglind', 'Anna', ''], dtype=object)
array(['Wason', 'James M. S.', ''], dtype=object)]
|
18,360 |
1801.06499
|
Juergen Reuter
|
Daniel Dercks, Gudrid Moortgat-Pick, Jurgen Reuter, So Young Shim
|
The fate of the Littlest Higgs Model with T-parity under 13 TeV LHC Data
|
50 pages, 32 figures
|
JHEP 1805 (2018) 049
|
10.1007/JHEP05(2018)049
|
DESY 17-192
|
hep-ph hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
We exploit all LHC available Run 2 data at center-of-mass energies of 8 and
13 TeV for searches for physics beyond the Standard Model. We scrutinize the
allowed parameter space of Little Higgs models with the concrete symmetry of
T-parity by providing comprehensive analyses of all relevant production
channels of heavy vectors, top partners, heavy quarks and heavy leptons and all
phenomenologically relevant decay channels. Constraints on the model will be
derived from the signatures of jets and missing energy or leptons and missing
energy. Besides the symmetric case, we also study the case of T-parity
violation. Furthermore, we give an extrapolation to the LHC high-luminosity
phase at 14 TeV as well.
|
[{'version': 'v1', 'created': 'Fri, 19 Jan 2018 17:28:59 GMT'}]
|
2018-05-14
|
[array(['Dercks', 'Daniel', ''], dtype=object)
array(['Moortgat-Pick', 'Gudrid', ''], dtype=object)
array(['Reuter', 'Jurgen', ''], dtype=object)
array(['Shim', 'So Young', ''], dtype=object)]
|
18,361 |
1104.2695
|
Mark Goodsell
|
Karim Benakli, Mark D. Goodsell and Ann-Kathrin Maier
|
Generating mu and Bmu in models with Dirac Gauginos
|
19 pages
| null |
10.1016/j.nuclphysb.2011.06.001
|
DESY 11-061
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the extension of the Minimal Supersymmetric Standard Model by
Dirac masses for the gauginos. We study the possibility that the same singlet
that pairs up with the bino, to form a Dirac fermion, is used to generate mu
and Bmu terms through its vacuum expectation value. For this purpose, we assume
that, in the Higgs potential, the necessary R-symmetry breaking originates
entirely from a superpotential term cubic in the singlet and discuss the
implications for the spectrum of the model.
|
[{'version': 'v1', 'created': 'Thu, 14 Apr 2011 08:37:17 GMT'}]
|
2015-05-27
|
[array(['Benakli', 'Karim', ''], dtype=object)
array(['Goodsell', 'Mark D.', ''], dtype=object)
array(['Maier', 'Ann-Kathrin', ''], dtype=object)]
|
18,362 |
1603.09707
|
Dor Shaviv
|
Dor Shaviv, Ayfer \"Ozg\"ur, Haim H. Permuter
|
Capacity of Remotely Powered Communication
|
accepted to IEEE Transactions on Information Theory, revised
following comments by reviewers
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated by recent developments in wireless power transfer, we study
communication with a remotely powered transmitter. We propose an
information-theoretic model where a charger can dynamically decide on how much
power to transfer to the transmitter based on its side information regarding
the communication, while the transmitter needs to dynamically adapt its coding
strategy to its instantaneous energy state, which in turn depends on the
actions previously taken by the charger. We characterize the capacity as an
$n$-letter mutual information rate under various levels of side information
available at the charger. When the charger is finely tunable to different
energy levels, referred to as a "precision charger", we show that these
expressions reduce to single-letter form and there is a simple and intuitive
joint charging and coding scheme achieving capacity. The precision charger
scenario is motivated by the observation that in practice the transferred
energy can be controlled by simply changing the amplitude of the beamformed
signal. When the charger does not have sufficient precision, for example when
it is restricted to use a few discrete energy levels, we show that the
computation of the $n$-letter capacity can be cast as a Markov decision process
if the channel is noiseless. This allows us to numerically compute the capacity
for specific cases and obtain insights on the corresponding optimal policy, or
even to obtain closed form analytical solutions by solving the corresponding
Bellman equations, as we demonstrate through examples. Our findings provide
some surprising insights on how side information at the charger can be used to
increase the overall capacity of the system.
|
[{'version': 'v1', 'created': 'Thu, 31 Mar 2016 18:32:56 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Dec 2016 04:20:22 GMT'}]
|
2016-12-12
|
[array(['Shaviv', 'Dor', ''], dtype=object)
array(['Özgür', 'Ayfer', ''], dtype=object)
array(['Permuter', 'Haim H.', ''], dtype=object)]
|
18,363 |
1409.0703
|
Alejandro Sanchez Guinea
|
Alejandro Sanchez Guinea
|
On computable abstractions (a conceptual introduction)
|
17 pages; clearer and more precise motivation; clearer concepts
presented; review on related works added
| null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper introduces abstractions that are meaningful for computers and that
can be built and used according to computers' own criteria, i.e., computable
abstractions. It is analyzed how abstractions can be seen to serve as the
building blocks for the creation of one own's understanding of things, which is
essential in performing intellectual tasks. Thus, abstractional machines are
defined, which following a mechanical process can, based on computable
abstractions, build and use their own understanding of things. Abstractional
machines are illustrated through an example that outlines their application to
the task of natural language processing.
|
[{'version': 'v1', 'created': 'Fri, 29 Aug 2014 18:29:53 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Dec 2014 14:50:58 GMT'}
{'version': 'v3', 'created': 'Thu, 22 Jan 2015 13:21:52 GMT'}
{'version': 'v4', 'created': 'Sun, 29 Mar 2015 14:27:16 GMT'}]
|
2015-03-31
|
[array(['Guinea', 'Alejandro Sanchez', ''], dtype=object)]
|
18,364 |
1504.01961
|
Luis Castro B
|
Luis B. Castro
|
Quantum dynamics of scalar bosons in a cosmic string background
|
9 pages, 5 figures
|
Eur.Phys.J. C75 (2015) 6, 287
|
10.1140/epjc/s10052-015-3507-5
| null |
hep-th math-ph math.MP quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The quantum dynamics of scalar bosons embedded in the background of a cosmic
string is considered. In this work, scalar bosons are described by the
Duffin-Kemmer-Petiau (DKP) formalism. In particular, the effects of this
topological defect in the equation of motion, energy spectrum and DKP spinor
are analyzed and discussed in details. The exact solutions for the DKP
oscillator in this background are presented in a closed form.
|
[{'version': 'v1', 'created': 'Wed, 8 Apr 2015 13:42:10 GMT'}
{'version': 'v2', 'created': 'Tue, 30 Jun 2015 15:16:44 GMT'}]
|
2015-07-01
|
[array(['Castro', 'Luis B.', ''], dtype=object)]
|
18,365 |
1611.03435
|
Paulwin Graewe
|
Paulwin Graewe, Ulrich Horst
|
Optimal Trade Execution with Instantaneous Price Impact and Stochastic
Resilience
| null |
SIAM J. Control Optim. 55 (2017) 3707-3725
|
10.1137/16M1105463
| null |
math.OC math.PR q-fin.TR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study an optimal execution problem in illiquid markets with both
instantaneous and persistent price impact and stochastic resilience when only
absolutely continuous trading strategies are admissible. In our model the value
function can be described by a three-dimensional system of backward stochastic
differential equations (BSDE) with a singular terminal condition in one
component. We prove existence and uniqueness of a solution to the BSDE system
and characterize both the value function and the optimal strategy in terms of
the unique solution to the BSDE system. Our existence proof is based on an
asymptotic expansion of the BSDE system at the terminal time that allows us to
express the system in terms of a equivalent system with finite terminal value
but singular driver.
|
[{'version': 'v1', 'created': 'Thu, 10 Nov 2016 18:18:38 GMT'}
{'version': 'v2', 'created': 'Mon, 28 Nov 2016 12:17:35 GMT'}
{'version': 'v3', 'created': 'Mon, 26 Jun 2017 13:49:57 GMT'}
{'version': 'v4', 'created': 'Fri, 7 Jul 2017 14:18:27 GMT'}]
|
2017-11-30
|
[array(['Graewe', 'Paulwin', ''], dtype=object)
array(['Horst', 'Ulrich', ''], dtype=object)]
|
18,366 |
2109.04018
|
Zequn Liu
|
Zequn Liu, Shukai Wang, Yiyang Gu, Ruiyi Zhang, Ming Zhang, Sheng Wang
|
Graphine: A Dataset for Graph-aware Terminology Definition Generation
|
EMNLP 2021
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Precisely defining the terminology is the first step in scientific
communication. Developing neural text generation models for definition
generation can circumvent the labor-intensity curation, further accelerating
scientific discovery. Unfortunately, the lack of large-scale terminology
definition dataset hinders the process toward definition generation. In this
paper, we present a large-scale terminology definition dataset Graphine
covering 2,010,648 terminology definition pairs, spanning 227 biomedical
subdisciplines. Terminologies in each subdiscipline further form a directed
acyclic graph, opening up new avenues for developing graph-aware text
generation models. We then proposed a novel graph-aware definition generation
model Graphex that integrates transformer with graph neural network. Our model
outperforms existing text generation models by exploiting the graph structure
of terminologies. We further demonstrated how Graphine can be used to evaluate
pretrained language models, compare graph representation learning methods and
predict sentence granularity. We envision Graphine to be a unique resource for
definition generation and many other NLP tasks in biomedicine.
|
[{'version': 'v1', 'created': 'Thu, 9 Sep 2021 03:29:23 GMT'}]
|
2021-09-10
|
[array(['Liu', 'Zequn', ''], dtype=object)
array(['Wang', 'Shukai', ''], dtype=object)
array(['Gu', 'Yiyang', ''], dtype=object)
array(['Zhang', 'Ruiyi', ''], dtype=object)
array(['Zhang', 'Ming', ''], dtype=object)
array(['Wang', 'Sheng', ''], dtype=object)]
|
18,367 |
2305.01763
|
Ahmet-Serdar Karakaya
|
Ahmet-Serdar Karakaya, Ioan-Alexandru Stef, Konstantin K\"ohler,
Julian Heinovski, Falko Dressler
|
Achieving Realistic Cyclist Behavior in SUMO using the SimRa Dataset
|
arXiv admin note: substantial text overlap with arXiv:2205.04538
| null | null | null |
cs.MA cs.SY eess.SY
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Increasing the modal share of bicycle traffic to reduce carbon emissions,
reduce urban car traffic, and to improve the health of citizens, requires a
shift away from car-centric city planning. For this, traffic planners often
rely on simulation tools such as SUMO which allow them to study the effects of
construction changes before implementing them. Similarly, studies of vulnerable
road users, here cyclists, also use such models to assess the performance of
communication-based road traffic safety systems. The cyclist model in SUMO,
however, is very imprecise as SUMO cyclists behave either like slow cars or
fast pedestrians, thus, casting doubt on simulation results for bicycle
traffic. In this paper, we analyze acceleration, deceleration, velocity, and
intersection left-turn behavior of cyclists in a large dataset of real world
cycle tracks. We use the results to improve the existing cyclist model in SUMO
and add three more detailed cyclist models and implement them in SUMO.
|
[{'version': 'v1', 'created': 'Tue, 2 May 2023 20:03:52 GMT'}]
|
2023-05-04
|
[array(['Karakaya', 'Ahmet-Serdar', ''], dtype=object)
array(['Stef', 'Ioan-Alexandru', ''], dtype=object)
array(['Köhler', 'Konstantin', ''], dtype=object)
array(['Heinovski', 'Julian', ''], dtype=object)
array(['Dressler', 'Falko', ''], dtype=object)]
|
18,368 |
1211.6195
|
EPTCS
|
Kenneth Y. J{\o}rgensen, Kim G. Larsen, Ji\v{r}\'i Srba
|
Time-Darts: A Data Structure for Verification of Closed Timed Automata
|
In Proceedings SSV 2012, arXiv:1211.5873
|
EPTCS 102, 2012, pp. 141-155
|
10.4204/EPTCS.102.13
| null |
cs.DS cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Symbolic data structures for model checking timed systems have been subject
to a significant research, with Difference Bound Matrices (DBMs) still being
the preferred data structure in several mature verification tools. In
comparison, discretization offers an easy alternative, with all operations
having linear-time complexity in the number of clocks, and yet valid for a
large class of closed systems. Unfortunately, fine-grained discretization
causes itself a state-space explosion. We introduce a new data structure called
time-darts for the symbolic representation of state-spaces of timed automata.
Compared with the complete discretization, a single time-dart allows to
represent an arbitrary large set of states, yet the time complexity of
operations on time-darts remain linear in the number of clocks. We prove the
correctness of the suggested reachability algorithm and perform several
experiments in order to compare the performance of time-darts and the complete
discretization. The main conclusion is that in all our experiments the
time-dart method outperforms the complete discretization and it scales
significantly better for models with larger constants.
|
[{'version': 'v1', 'created': 'Tue, 27 Nov 2012 02:37:21 GMT'}]
|
2012-11-28
|
[array(['Jørgensen', 'Kenneth Y.', ''], dtype=object)
array(['Larsen', 'Kim G.', ''], dtype=object)
array(['Srba', 'Jiří', ''], dtype=object)]
|
18,369 |
2102.08675
|
Georgios Mylonas
|
Lidia Pocero, Stelios Tsampas, Georgios Mylonas, Dimitrios Amaxilatis
|
Experiences from Using LoRa and IEEE 802.15.4 for IoT-enabled Classrooms
|
Preprint version of the paper submitted to 2019 European Conference
on Ambient Intelligence, 13-15 November 2019, Rome, Italy (AmI 2019).
DOI:10.1007/978-3-030-34255-5_13
| null |
10.1007/978-3-030-34255-5_13
| null |
cs.NI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Several networking technologies targeting the IoT application space currently
compete within the smart city domain, both in outdoor and indoor deployments.
However, up till now, there is no clear winner, and results from real-world
deployments have only recently started to surface. In this paper, we present a
comparative study of 2 popular IoT networking technologies, LoRa and IEEE
802.15.4, within the context of a research-oriented IoT deployment inside
school buildings in Europe, targeting energy efficiency in education. We
evaluate the actual performance of these two technologies in real-world
settings, presenting a comparative study on the effect of parameters like the
built environment, network quality, or data rate. Our results indicate that
both technologies have their advantages, and while in certain cases both are
perfectly adequate, in our use case LoRa exhibits a more robust behavior.
Moreover, LoRa's characteristics make it a very good choice for indoor IoT
deployments such as in educational buildings, and especially in cases where
there are low bandwidth requirements.
|
[{'version': 'v1', 'created': 'Wed, 17 Feb 2021 10:38:31 GMT'}]
|
2021-02-18
|
[array(['Pocero', 'Lidia', ''], dtype=object)
array(['Tsampas', 'Stelios', ''], dtype=object)
array(['Mylonas', 'Georgios', ''], dtype=object)
array(['Amaxilatis', 'Dimitrios', ''], dtype=object)]
|
18,370 |
0806.0365
|
Fabio Lucio Toninelli
|
F. Toninelli (CNRS and Laboratoire de Physique, ENS Lyon)
|
Coarse graining, fractional moments and the critical slope of random
copolymers
|
15 pages, 1 figure
|
Electronic Journal of Probability 14, 531-547 (2009)
| null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For a much-studied model of random copolymer at a selective interface we
prove that the slope of the critical curve in the weak-disorder limit is
strictly smaller than 1, which is the value given by the annealed inequality.
The proof is based on a coarse-graining procedure, combined with upper bounds
on the fractional moments of the partition function.
|
[{'version': 'v1', 'created': 'Mon, 2 Jun 2008 19:33:23 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Feb 2009 11:41:11 GMT'}]
|
2009-02-25
|
[array(['Toninelli', 'F.', '',
'CNRS and Laboratoire de Physique, ENS Lyon'], dtype=object)]
|
18,371 |
1110.0686
|
Lorenzo Sindoni
|
Lorenzo Sindoni
|
Emergent Models for Gravity: an Overview of Microscopic Models
| null |
SIGMA 8 (2012), 027, 45 pages
|
10.3842/SIGMA.2012.027
|
AEI-2011-68
|
gr-qc hep-th
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
We give a critical overview of various attempts to describe gravity as an
emergent phenomenon, starting from examples of condensed matter physics, to
arrive to more sophisticated pregeometric models. The common line of thought is
to view the graviton as a composite particle/collective mode. However, we will
describe many different ways in which this idea is realized in practice.
|
[{'version': 'v1', 'created': 'Tue, 4 Oct 2011 13:55:38 GMT'}
{'version': 'v2', 'created': 'Sat, 12 May 2012 06:16:46 GMT'}]
|
2012-05-15
|
[array(['Sindoni', 'Lorenzo', ''], dtype=object)]
|
18,372 |
0712.3714
|
Josef Tkadlec
|
Josef Tkadlec
|
Atomistic and orthoatomistic effect algebras
|
6 pages
| null |
10.1063/1.2912228
| null |
quant-ph
| null |
We characterize atomistic effect algebras, prove that a weakly orthocomplete
Archimedean atomic effect algebra is orthoatomistic and present an example of
an orthoatomistic orthomodular poset that is not weakly orthocomplete.
|
[{'version': 'v1', 'created': 'Fri, 21 Dec 2007 15:22:52 GMT'}]
|
2009-11-13
|
[array(['Tkadlec', 'Josef', ''], dtype=object)]
|
18,373 |
1010.1576
|
Jung Hyun Oh
|
Jung Hyun Oh, D. Ahn, and Vladimir Bubanja
|
Transport theory of coupled quantum dots based on auxiliary operator
method
|
16pages, 5 figures
| null |
10.1103/PhysRevB.83.205302
| null |
cond-mat.mes-hall physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We formulate the theory of electron transport through coupled-quantum dots by
extending the auxiliary operator representation. By using the generating
functional technique, we derive the exact expressions for currents,
dot-occupation numbers and spin correlations, and examine them based on the
non-equilibrium Green's function method under the non-crossing approximation
(NCA). Our formulation generalizes the previous NCA approaches by allowing full
occupation numbers with a finite Coulomb repulsion.
|
[{'version': 'v1', 'created': 'Fri, 8 Oct 2010 01:04:37 GMT'}]
|
2015-05-20
|
[array(['Oh', 'Jung Hyun', ''], dtype=object)
array(['Ahn', 'D.', ''], dtype=object)
array(['Bubanja', 'Vladimir', ''], dtype=object)]
|
18,374 |
hep-ph/9803252
| null |
N.O.Agasian (ITEP)
|
Effects of Screening of the Instantons in Nonperturbative QCD
|
11 pages, LaTeX 2.09
| null | null |
ITEP-PH-2/98
|
hep-ph
| null |
The gluon fields screening in the stochastic vacuum of gluodynamics is
studied. The effective action is derived for the instanton interacting with
nonperturbative fields. Quantum nonperturbative effects are shown to affect
greatly the shape of instanton. The power asymptotics x^{-2} of the classical
"instanton's profile function" at large distances is replaced due to yhese
effects by Airy function asymptotics x^{-1/4} exp(-const\cdot x^{3/2}).
|
[{'version': 'v1', 'created': 'Thu, 5 Mar 1998 13:01:05 GMT'}]
|
2007-05-23
|
[array(['Agasian', 'N. O.', '', 'ITEP'], dtype=object)]
|
18,375 |
1402.2533
|
Rebecca Reesman
|
Rebecca Reesman, T.P. Walker
|
Probing the Scale of ALP Interactions with Fermi Blazars
| null | null |
10.1088/1475-7516/2014/08/021
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Gamma-rays from cosmological sources contain information about gamma-ray
interactions. Standard model and non-standard model photon interactions along
the path between the source and the observer can lead to changes in the energy
or state of the photons, which in turn alters the observed energy spectrum of
the source. In general, these interactions are a function of photon energy as
well as source distance. Here we show how existing high energy (50 GeV --
10TeV) gamma-ray observations of blazars can be used to constrain the coupling
of axion-like-particles (ALPs) to the photon. The same ALP-photon coupling that
has been invoked to explain the observations of TeV blazars beyond their pair
production horizon is shown to have an effect of the data set of \textit{Fermi}
blazars.
|
[{'version': 'v1', 'created': 'Tue, 11 Feb 2014 15:45:04 GMT'}
{'version': 'v2', 'created': 'Wed, 7 May 2014 19:35:35 GMT'}]
|
2014-08-19
|
[array(['Reesman', 'Rebecca', ''], dtype=object)
array(['Walker', 'T. P.', ''], dtype=object)]
|
18,376 |
0907.3902
|
Peter Browne R{\o}nne
|
Thomas Creutzig, Peter B. Ronne, Volker Schomerus
|
N=2 Superconformal Symmetry in Super Coset Models
|
7 pages; v2: Typos corrected, three references added
|
Phys.Rev.D80:066010,2009
|
10.1103/PhysRevD.80.066010
|
DESY 09-111
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend the Kazama-Suzuki construction of models with N=(2,2) world-sheet
supersymmetry to cosets S/K of supergroups. Among the admissible target spaces
that allow for an extension to N=2 superconformal algebras are some simple Lie
supergroups, including PSL(N|N). Our general analysis is illustrated at the
example of the N=1 WZNW model on GL(1|1). After constructing its N=2
superconformal algebra we determine the (anti-)chiral ring of the theory. It
exhibits an interesting interplay between world-sheet and target space
supersymmetry.
|
[{'version': 'v1', 'created': 'Wed, 22 Jul 2009 19:08:50 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Jan 2010 13:36:03 GMT'}]
|
2010-01-21
|
[array(['Creutzig', 'Thomas', ''], dtype=object)
array(['Ronne', 'Peter B.', ''], dtype=object)
array(['Schomerus', 'Volker', ''], dtype=object)]
|
18,377 |
2112.07227
|
Weiyi Li
|
Weiyi Li, Hongmei Chen, Tianrui Li, Jihong Wan, Binbin Sang
|
Unsupervised feature selection via self-paced learning and low-redundant
regularization
| null | null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Much more attention has been paid to unsupervised feature selection nowadays
due to the emergence of massive unlabeled data. The distribution of samples and
the latent effect of training a learning method using samples in more effective
order need to be considered so as to improve the robustness of the method.
Self-paced learning is an effective method considering the training order of
samples. In this study, an unsupervised feature selection is proposed by
integrating the framework of self-paced learning and subspace learning.
Moreover, the local manifold structure is preserved and the redundancy of
features is constrained by two regularization terms. $L_{2,1/2}$-norm is
applied to the projection matrix, which aims to retain discriminative features
and further alleviate the effect of noise in the data. Then, an iterative
method is presented to solve the optimization problem. The convergence of the
method is proved theoretically and experimentally. The proposed method is
compared with other state of the art algorithms on nine real-world datasets.
The experimental results show that the proposed method can improve the
performance of clustering methods and outperform other compared algorithms.
|
[{'version': 'v1', 'created': 'Tue, 14 Dec 2021 08:28:19 GMT'}]
|
2021-12-15
|
[array(['Li', 'Weiyi', ''], dtype=object)
array(['Chen', 'Hongmei', ''], dtype=object)
array(['Li', 'Tianrui', ''], dtype=object)
array(['Wan', 'Jihong', ''], dtype=object)
array(['Sang', 'Binbin', ''], dtype=object)]
|
18,378 |
astro-ph/0412366
|
Axel Brandenburg
|
A. Brandenburg (Nordita)
|
Importance of magnetic helicity in dynamos
|
to appear in "Cosmic magnetic fields", eds. R. Wielebinski & R. Beck
|
in Cosmic magnetic fields, ed. R. Wielebinski & R. Beck, Springer,
pp. 219-253 (2005)
|
10.1007/3540313966_9
|
NORDITA-2004-104
|
astro-ph
| null |
Magnetic helicity is nearly conserved and its evolution equation provides a
dynamical feedback on the alpha effect that is distinct from the conventional
algebraic alpha quenching. The seriousness of this dynamical alpha quenching is
particularly evident in the case of closed or periodic boxes. The explicit
connection with catastrophic alpha quenching is reviewed and the alleviating
effects of magnetic and current helicity fluxes are discussed.
|
[{'version': 'v1', 'created': 'Wed, 15 Dec 2004 10:22:24 GMT'}]
|
2022-09-21
|
[array(['Brandenburg', 'A.', '', 'Nordita'], dtype=object)]
|
18,379 |
2201.06807
|
Yuta Nakamura
|
Yuta Nakamura, Takashi Takahashi, Yoshiyuki Kabashima
|
Statistical mechanics analysis of general multi-dimensional knapsack
problems
|
21 pages with 7 figures
|
J. Phys. A: Math. Theor. 55 375003 (2022)
|
10.1088/1751-8121/ac8381
| null |
math.OC cond-mat.dis-nn cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Knapsack problem (KP) is a representative combinatorial optimization problem
that aims to maximize the total profit by selecting a subset of items under
given constraints on the total weights. In this study, we analyze a generalized
version of KP, which is termed the generalized multidimensional knapsack
problem (GMDKP). As opposed to the basic KP, GMDKP allows multiple choices per
item type under multiple weight constraints. Although several efficient
algorithms are known and the properties of their solutions have been examined
to a significant extent for basic KPs, there is a paucity of known algorithms
and studies on the solution properties of GMDKP. To gain insight into the
problem, we assess the typical achievable limit of the total profit for a
random ensemble of GMDKP using the replica method. Our findings are summarized
as follows: (1) When the profits of item types are normally distributed, the
total profit grows in the leading order with respect to the number of item
types as the maximum number of choices per item type $x^{\rm max}$ increases
while it depends on $x^{\rm max}$ only in a sub-leading order if the profits
are constant among the item types. (2) A greedy-type heuristic can find a
nearly optimal solution whose total profit is lower than the optimal value only
by a sub-leading order with a low computational cost. (3) The sub-leading
difference from the optimal total profit can be improved by a heuristic
algorithm based on the cavity method. Extensive numerical experiments support
these findings.
|
[{'version': 'v1', 'created': 'Tue, 18 Jan 2022 08:25:31 GMT'}
{'version': 'v2', 'created': 'Mon, 22 Aug 2022 01:42:00 GMT'}]
|
2022-08-23
|
[array(['Nakamura', 'Yuta', ''], dtype=object)
array(['Takahashi', 'Takashi', ''], dtype=object)
array(['Kabashima', 'Yoshiyuki', ''], dtype=object)]
|
18,380 |
1605.04201
|
Christian Lameiro
|
Christian Lameiro and Ignacio Santamaria and Peter J. Schreier
|
Rate region boundary of the SISO Z-interference channel with improper
signaling
| null |
IEEE Transactions on Communications, vol. 65, no. 3, pp. 1022-1034
(March 2017)
|
10.1109/TCOMM.2016.2641948
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper provides a complete characterization of the boundary of an
achievable rate region, called the Pareto boundary, of the single-antenna Z
interference channel (Z-IC), when interference is treated as noise and users
transmit complex Gaussian signals that are allowed to be improper. By
considering the augmented complex formulation, we derive a necessary and
sufficient condition for improper signaling to be optimal. This condition is
stated as a threshold on the interference channel coefficient, which is a
function of the interfered user rate and which allows insightful
interpretations into the behavior of the achievable rates in terms of the
circularity coefficient (i.e., degree of impropriety). Furthermore, the optimal
circularity coefficient is provided in closed form. The simplicity of the
obtained characterization permits interesting insights into when and how
improper signaling outperforms proper signaling in the single-antenna Z-IC. We
also provide an in-depth discussion on the optimal strategies and the
properties of the Pareto boundary.
|
[{'version': 'v1', 'created': 'Fri, 13 May 2016 14:55:04 GMT'}
{'version': 'v2', 'created': 'Fri, 23 Jun 2017 12:18:49 GMT'}]
|
2017-06-26
|
[array(['Lameiro', 'Christian', ''], dtype=object)
array(['Santamaria', 'Ignacio', ''], dtype=object)
array(['Schreier', 'Peter J.', ''], dtype=object)]
|
18,381 |
gr-qc/0501107
|
Ozgur Delice
|
Ozgur Delice (Bogazici U)
|
Radiating Levi-Civita Spacetime
|
This paper has been withdrawn
| null | null | null |
gr-qc
| null |
This paper has been withdrawn by the author, See J.Krishna Rao, J. Phys. A:
Gen. Phys., 4, 17 (1971) for radiating Levi-Civita metric.
|
[{'version': 'v1', 'created': 'Mon, 31 Jan 2005 19:16:11 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Jun 2005 14:22:42 GMT'}]
|
2007-05-23
|
[array(['Delice', 'Ozgur', '', 'Bogazici U'], dtype=object)]
|
18,382 |
cond-mat/0207092
|
Cheng Chin
|
Cheng Chin, Andrew J. Kerman, Vladan Vuleti\'c, and Steven Chu
|
Sensitive Detection of Cold Cesium Molecules by Radiative Feshbach
Spectroscopy
| null | null |
10.1103/PhysRevLett.90.033201
| null |
cond-mat
| null |
We observe the dynamic formation of $Cs_2$ molecules near Feshbach resonances
in a cold sample of atomic cesium using an external probe beam. This method is
300 times more sensitive than previous atomic collision rate methods, and
allows us to detect more than 20 weakly-coupled molecular states, with
collisional formation cross sections as small as $\sigma =3\times
10^{-16}$cm$^2$. We propose a model to describe the atom-molecule coupling, and
estimate that more than $2 \times 10^5$ $Cs_2$ molecules coexist in dynamical
equilibrium with $10^8$ $Cs$ atoms in our trap for several seconds.
|
[{'version': 'v1', 'created': 'Wed, 3 Jul 2002 01:47:53 GMT'}]
|
2016-08-16
|
[array(['Chin', 'Cheng', ''], dtype=object)
array(['Kerman', 'Andrew J.', ''], dtype=object)
array(['Vuletić', 'Vladan', ''], dtype=object)
array(['Chu', 'Steven', ''], dtype=object)]
|
18,383 |
astro-ph/0011522
|
Pauline Barmby
|
P. Barmby (CfA), J.P. Huchra (CfA), J.P. Brodie (Lick Obs/UCSC)
|
The M31 Globular Cluster Luminosity Function
|
AJ, in press. 36 pages, including 7 figures
|
Astrophys.J. 121 (2001) 1482
|
10.1086/319389
| null |
astro-ph
| null |
We combine our compilation of photometry of M31 globular cluster and probable
cluster candidates with new near-infrared photometry for 30 objects. Using
these data we determine the globular cluster luminosity function (GCLF) in
multiple filters for the M31 halo clusters. We find a GCLF peak and dispersion
of V_0^0=16.84 +/-0.11, sigma_t=0.93 +/- 0.13 (Gaussian sigma = 1.20 +/- 0.14),
consistent with previous results. The halo GCLF peak colors (e.g., B^0_0 -
V^0_0) are consistent with the average cluster colors. We also measure V-band
GCLF parameters for several other subsamples of the M31 globular cluster
population. The inner third of the clusters have a GCLF peak significantly
brigher than that of the outer clusters (delta V =~ 0.5mag). Dividing the
sample by both galacticentric distance and metallicity, we find that the GCLF
also varies with metallicity, as the metal-poor clusters are on average 0.36
mag fainter than the metal-rich clusters. Our modeling of the catalog selection
effects suggests that they are not the cause of the measured differences, but a
more complete, less-contaminated M31 cluster catalog is required for
confirmation. Our results imply that dynamical destruction is not the only
factor causing variation in the M31 GCLF: metallicity, age, and cluster initial
mass function may also be important.
|
[{'version': 'v1', 'created': 'Tue, 28 Nov 2000 18:37:59 GMT'}]
|
2007-05-23
|
[array(['Barmby', 'P.', '', 'CfA'], dtype=object)
array(['Huchra', 'J. P.', '', 'CfA'], dtype=object)
array(['Brodie', 'J. P.', '', 'Lick Obs/UCSC'], dtype=object)]
|
18,384 |
1507.05932
|
Polyxeni Spilioti
|
Polyxeni Spilioti
|
Twisted Dirac operators and dynamical zeta functions
|
This paper is part of the author's phd thesis and is a follow-up of
the paper arXiv:1506.04672 for the case, where the irreducible representation
\sigma of M in not invariant under the action of the restricted Weyl group
| null | null | null |
math.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we consider the dynamical zeta functions of Ruelle and Selberg
associated with the geodesic flow of a compact hyperbolic odd dimensional
manifold $X$. These functions are initially defined on one complex variable $s$
in some right half-plane of $\mathbb{C}$. Our goal is the continue
meromorphically the dynamical zeta functions to the whole complex plane, using
the Selberg trace formula for arbitrary, not necessarily unitary,
representations $\chi$ of the fundamental group. First, we prove a trace
formula for the integral operator
$D^{\sharp}_{\chi}(\sigma)e^{-t(D^{\sharp}_{\chi}(\sigma))^{2}}$, induced by
the twisted Dirac operator $D^{\sharp}_{\chi}(\sigma)$ on $X$. Then we use
these results to establish the meromorphic continuation of the dynamical zeta
functions to $\mathbb{C}$.
|
[{'version': 'v1', 'created': 'Tue, 21 Jul 2015 18:11:36 GMT'}
{'version': 'v2', 'created': 'Thu, 23 Jul 2015 18:35:35 GMT'}
{'version': 'v3', 'created': 'Fri, 25 Sep 2015 20:13:04 GMT'}]
|
2015-09-29
|
[array(['Spilioti', 'Polyxeni', ''], dtype=object)]
|
18,385 |
1809.04134
|
Eliza O'Reilly
|
Eliza O'Reilly
|
Thin-shell concentration for zero cells of stationary Poisson mosaics
|
20 pages
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the concentration of the norm of a random vector $Y$ uniformly
sampled in the centered zero cell of two types of stationary and isotropic
random mosaics in $\mathbb{R}^n$ for large dimensions $n$. For a stationary and
isotropic Poisson-Voronoi mosaic, $Y$ has a radial and log-concave
distribution, implying that ${|Y|}/{\mathbb{E}(|Y|^2)^{\frac{1}{2}}}$
approaches one for large $n$. Assuming the cell intensity of the random mosaic
scales like $e^{n \rho_n}$, where $\lim_{n \to \infty} \rho_n = \rho$, $|Y|$ is
on the order of $\sqrt{n}$ for large $n$. For the Poisson-Voronoi mosaic, we
show that $|Y|/\sqrt{n}$ concentrates to $e^{-\rho}(2\pi e)^{-\frac{1}{2}}$ as
$n$ increases, and for a stationary and isotropic Poisson hyperplane mosaic, we
show there is a range $(R_{\ell}, R_u)$ such that ${|Y|}/{\sqrt{n}}$ will be
within this range with high probability for large $n$. The rates of convergence
are also computed in both cases.
|
[{'version': 'v1', 'created': 'Tue, 11 Sep 2018 20:00:43 GMT'}
{'version': 'v2', 'created': 'Wed, 4 Sep 2019 21:43:42 GMT'}]
|
2019-09-06
|
[array(["O'Reilly", 'Eliza', ''], dtype=object)]
|
18,386 |
2208.02800
|
Carmelita Carbone Dr
|
Lorenzo Pizzuti, Alessandro Tomella, Carmelita Carbone, Matteo
Calabrese, Carlo Baccigalupi
|
Boltzmann equations for astrophysical Stochastic Gravitational Wave
Backgrounds scattering off of massive objects
|
28 pages, 2 tables, 2 figures. Matches the accepted version in JCAP
|
JCAP02(2023)054
|
10.1088/1475-7516/2023/02/054
| null |
astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This work presents a set of coupled Boltzmann equations describing the
intensity and polarisation Stokes parameters of the SGWB. Collision terms,
which account for gravitational Compton scattering off of massive objects, are
also included. This set resembles that for the CMB Stokes parameters, but the
different spin nature of the gravitational radiation and the physics involved
in the scattering process determine crucial differences. In this case, due to
the Rutherford angular dependence of the cross section, all the SGWB intensity
multipoles of order $\ell$ are scattered out, producing outgoing intensity
anisotropies of any order $\ell$ if they are present in the incoming radiation.
On the other hand, SGWB linear polarisation modes can be expanded in a basis of
spherical harmonics with $m=\pm 4$ and $\ell\ge 4$. This means that SGWB
polarisation modes can be generated from unpolarised anisotropic radiation only
with $m=\pm 4$, therefore requiring at least a hexadecapole anisotropy
($\ell\ge 4$) in the incoming intensity. Assuming a simplified toy model, we
solve analytically the set of coupled Boltzmann equations to get explicit
expressions for the intensity and polarisation angular power spectra. We
confirm the contribution of the gravitational Compton scattering to the SGWB
anisoptropies is extremely small for collisions with compact objects in the
frequency range of current and upcoming surveys. The system of coupled
Boltzmann equations presented here provides a way to an accurate estimate of
the total amount of anisotropies generated by multiple SGWB scattering
processes off of massive objects, as well as the interplay between polarisation
and intensity, during the GW propagation across the LSS of the universe. These
results will be useful for the full treatment of the astrophysical SWGB
anisotropies in view of upcoming gravitational waves observatories.
|
[{'version': 'v1', 'created': 'Thu, 4 Aug 2022 17:54:27 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Aug 2022 17:44:19 GMT'}
{'version': 'v3', 'created': 'Sun, 5 Feb 2023 22:26:20 GMT'}]
|
2023-03-01
|
[array(['Pizzuti', 'Lorenzo', ''], dtype=object)
array(['Tomella', 'Alessandro', ''], dtype=object)
array(['Carbone', 'Carmelita', ''], dtype=object)
array(['Calabrese', 'Matteo', ''], dtype=object)
array(['Baccigalupi', 'Carlo', ''], dtype=object)]
|
18,387 |
math/0106120
|
Oleg I. Berngardt
|
Oleg I.Berngardt, Alexander L.Voronov
|
Least Sqaure Method for Sum of the Functions Satysfying the Differential
Equations with Polynomial Coefficients
|
9 pages
|
Analele Universitatii din Timisoara Vol. XXXIX, Fasc. special,
2001, Seria Matematica/Informatica, pp.21-29
| null | null |
math.NA cs.NA math.OC
| null |
We propose a linear algorithm for determining two function parameters by
their linear combination. These functions must satisfy the first order
differential equations with polynomial coefficients and our parameters are the
coefficients of these polynomials. The algorithm consists of sequential
solution by least squares method of two linear problems - first, differential
equation polynomial coefficients determining for linear combination of two
given functions and second - determining functions parameters by these
polynomial coefficients. Numerical modeling carried by this scheme gives an
good accordance under weak normal noise (with dispersion (<5%)).
|
[{'version': 'v1', 'created': 'Thu, 14 Jun 2001 11:32:09 GMT'}]
|
2009-01-09
|
[array(['Berngardt', 'Oleg I.', ''], dtype=object)
array(['Voronov', 'Alexander L.', ''], dtype=object)]
|
18,388 |
1105.3141
|
Rashid Nazmitdinov
|
W.D.Heiss and R.G.Nazmitdinov
|
Spectral Singularities and Zero Energy Bound States
|
5pages, 3 figures
|
Eur.Phys.J.D63:369-373,2011
|
10.1140/epjd/e2011-20174-4
| null |
cond-mat.quant-gas nucl-th physics.atm-clus
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Single particle scattering around zero energy is re-analysed in view of
recent experiments with ultra-cold atoms, nano-structures and nuclei far from
the stability valley. For non-zero orbital angular momentum the low energy
scattering cross section exhibits dramatic changes depending on the occurrence
of either a near resonance or a bound state or the situation in between, that
is a bound state at zero energy. Such state is singular in that it has an
infinite scattering length, behaves for the eigenvalues but not for the
eigenfunctions as an exceptional point and has no pole in the scattering
function. These results should be observable whenever the interaction or
scattering length can be controlled.
|
[{'version': 'v1', 'created': 'Mon, 16 May 2011 16:32:03 GMT'}]
|
2011-08-04
|
[array(['Heiss', 'W. D.', ''], dtype=object)
array(['Nazmitdinov', 'R. G.', ''], dtype=object)]
|
18,389 |
astro-ph/9401031
|
Tsvi Piran
|
Tsvi Piran
|
Fireballs and Gamma-Ray Bursts
|
Ten pages, 2 figures can be obtained from the author by e-mail on
request
| null | null | null |
astro-ph
| null |
The sudden release of copious $\g$-ray photons into a compact region creates
an opaque photon--lepton fireball due to the prolific production of
electron--positron pairs. The photons that we observe in the bursts emerge only
at the end of the fireball phase after it expanded sufficiently to become
optically thin or after it converted its energy to the kinetic energy of
relativistic baryons which convert it, in turn, to electromagnetic pulse via
the interaction with interstellar matter. It is essential, therefore, to
analyze the evolution of a fireball in order to comprehend the observed
features of $\gamma$-ray bursts. We discuss various aspects of fireball
hydrodynamics and the resulting emitted spectra.
|
[{'version': 'v1', 'created': 'Mon, 17 Jan 1994 09:01:15 GMT'}]
|
2007-05-23
|
[array(['Piran', 'Tsvi', ''], dtype=object)]
|
18,390 |
math/0610764
|
Huiqiang Jiang
|
Fengbo Hang and Huiqiang Jiang
|
A remark on the existence of suitable vector fields related to the
dynamics of scalar semi-linear parabolic equations
|
5 pages
|
Proceedings of AMS, 134(9):2633-2637, 2006
| null | null |
math.AP math.DS
| null |
In 1992, P. Pol\'{a}\v{c}ik\cite{P2} showed that one could linearly imbed any
vector fields into a scalar semi-linear parabolic equation on $\Omega$ with
Neumann boundary condition provided that there exists a smooth vector field
$\Phi=(\phi_{1},...,\phi_{n}) $ on $\bar{\Omega}$ such that \[
\left\{\begin{array} [c]{l}% \operatorname*{rank}(\Phi(x) ,\partial_{1}\Phi(x)
,...,\partial_{n}\Phi(x)) =n\text{for all}x\in\bar{\Omega},
\frac{\partial\Phi}{\partial\nu}=0\text{on}\partial\Omega\text{.}% \end{array}
\right. \] In this short note, we give a classification of all the domains on
which one may find such type of vector fields.
|
[{'version': 'v1', 'created': 'Wed, 25 Oct 2006 19:12:57 GMT'}]
|
2007-05-23
|
[array(['Hang', 'Fengbo', ''], dtype=object)
array(['Jiang', 'Huiqiang', ''], dtype=object)]
|
18,391 |
2009.07839
|
Richard Yuanzhe Pang
|
Richard Yuanzhe Pang, He He
|
Text Generation by Learning from Demonstrations
|
ICLR 2021
| null | null | null |
cs.CL cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Current approaches to text generation largely rely on autoregressive models
and maximum likelihood estimation. This paradigm leads to (i) diverse but
low-quality samples due to mismatched learning objective and evaluation metric
(likelihood vs. quality) and (ii) exposure bias due to mismatched history
distributions (gold vs. model-generated). To alleviate these problems, we frame
text generation as an offline reinforcement learning (RL) problem with expert
demonstrations (i.e., the reference), where the goal is to maximize quality
given model-generated histories. We propose GOLD (generation by off-policy
learning from demonstrations): an easy-to-optimize algorithm that learns from
the demonstrations by importance weighting. Intuitively, GOLD upweights
confident tokens and downweights unconfident ones in the reference during
training, avoiding optimization issues faced by prior RL approaches that rely
on online data collection. According to both automatic and human evaluation,
models trained by GOLD outperform those trained by MLE and policy gradient on
summarization, question generation, and machine translation. Further, our
models are less sensitive to decoding algorithms and alleviate exposure bias.
|
[{'version': 'v1', 'created': 'Wed, 16 Sep 2020 17:58:37 GMT'}
{'version': 'v2', 'created': 'Wed, 3 Mar 2021 03:43:28 GMT'}]
|
2021-03-04
|
[array(['Pang', 'Richard Yuanzhe', ''], dtype=object)
array(['He', 'He', ''], dtype=object)]
|
18,392 |
1412.4740
|
Leonid Perlov
|
Leonid Perlov
|
Wheeler-DeWitt Equation for 4D Supermetric and ADM with Massless Scalar
Field as Internal Time
| null |
Physics.Letters.B. 743 (2015) 143-146
|
10.1016/j.physletb.2015.02.030
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The main result of this paper is the 4-dimensional supermetric version of the
Wheeler-DeWitt equation, that uses only one time variable for the both roles -
as internal time and for the ADM split, as Hamiltonian evolution parameter. We
study the ADM split with respect to the scalar massless field serving as
internal time. The 4-dimensional hyper-surfaces $\Sigma_{\phi = const}$ span
the 5-dimensional space with the scalar field being the fifth coordinate. As a
result we obtain the analog of the Wheeler-DeWitt equation for the
4-dimensional supermetric. We compare the ADM action with the non-compactified
Kaluza-Klein action for the same physical space and obtain the equation for the
extrinsic curvature and the scalar massless field.
|
[{'version': 'v1', 'created': 'Mon, 15 Dec 2014 19:46:23 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Dec 2014 18:26:48 GMT'}
{'version': 'v3', 'created': 'Sat, 14 Feb 2015 06:18:54 GMT'}]
|
2015-10-29
|
[array(['Perlov', 'Leonid', ''], dtype=object)]
|
18,393 |
1704.08766
|
Camilo Ruiz Mr.
|
P. Castro-Mar\'in, G. Castro-Olvera, C. Ru\'iz, J. Gardu\~no-Mej\'ia,
M. Rosete-Aguilar, and N. C. Bruce
|
Z-scan confocal method for indirect focusing location
|
submitted to Review of Scientific Instruments
| null | null | null |
physics.ins-det physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a new technique that we have defined as the z-scan confocal method
to determine the absolute location and size of the focal spot in a tight
focused ultrashort laser pulse. The method permits to accurately position a
target in the focal spot with a fast response. The technique is designed to
help to automatize the location of an overdense target in focus in a laser
plasma experiment. The method allows for a fast localization of the focal
position and the relative motion of the target with respect to it. As an
example of the capacities we measure the defocusing of a fast rotating disc in
several radius to reconstruct the motion of the disc at focus.
|
[{'version': 'v1', 'created': 'Wed, 26 Apr 2017 10:09:56 GMT'}]
|
2017-05-01
|
[array(['Castro-Marín', 'P.', ''], dtype=object)
array(['Castro-Olvera', 'G.', ''], dtype=object)
array(['Ruíz', 'C.', ''], dtype=object)
array(['Garduño-Mejía', 'J.', ''], dtype=object)
array(['Rosete-Aguilar', 'M.', ''], dtype=object)
array(['Bruce', 'N. C.', ''], dtype=object)]
|
18,394 |
nlin/0310038
|
L. V. Bogdanov
|
L. V. Bogdanov and B. G. Konopelchenko
|
Nonlinear Beltrami equation and tau-function for dispersionless
hierarchies
|
12 pages
| null |
10.1016/j.physleta.2004.01.033
| null |
nlin.SI
| null |
It is proved that the action for nonlinear Beltrami equation (quasiclassical
dbar-problem) evaluated on its solution gives a tau-function for dispersionless
KP hierarchy. Infinitesimal transformations of tau-function corresponding to
variations of dbar-data are found. Determinant equations for the function
generating these transformations are derived. They represent a dispersionless
analogue of singular manifold (Schwarzian) KP equations. Dispersionless 2DTL
hierarchy is also considered.
|
[{'version': 'v1', 'created': 'Mon, 27 Oct 2003 16:07:23 GMT'}]
|
2009-11-10
|
[array(['Bogdanov', 'L. V.', ''], dtype=object)
array(['Konopelchenko', 'B. G.', ''], dtype=object)]
|
18,395 |
1411.4760
|
Ivan Marin
|
Ivan Marin and Goetz Pfeiffer
|
The BMR freeness conjecture for the 2-reflection groups
|
20 pages. Version 2 : the last remaining case (G34) of the conjecture
for 2-reflection groups is now proved. Version 3 : additional details
provided for the sample case of G24
| null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove the freeness conjecture of Broue, Malle and Rouquier for the Hecke
algebras associated to the primitive complex 2-reflection groups with a single
conjugacy class of reflections.
|
[{'version': 'v1', 'created': 'Tue, 18 Nov 2014 08:21:33 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Aug 2015 14:20:12 GMT'}
{'version': 'v3', 'created': 'Sat, 7 May 2016 15:21:26 GMT'}]
|
2016-05-10
|
[array(['Marin', 'Ivan', ''], dtype=object)
array(['Pfeiffer', 'Goetz', ''], dtype=object)]
|
18,396 |
hep-th/9710128
|
John M. Cornwall
|
John M. Cornwall
|
On One-Loop Gap Equations for the Magnetic Mass in d=3 Gauge Theory
|
21 pages, LaTex, 2 .eps figures
|
Phys. Rev. D 57, 3694 (1998)
|
10.1103/PhysRevD.57.3694
|
UCLA/97/TEP/12
|
hep-th
| null |
Recently several workers have attempted determinations of the so-called
magnetic mass of d=3 non-Abelian gauge theories through a one-loop gap
equation, using a free massive propagator as input. Self-consistency is
attained only on-shell, because the usual Feynman-graph construction is
gauge-dependent off-shell. We examine two previous studies of the pinch
technique proper self-energy, which is gauge-invariant at all momenta, using a
free propagator as input, and show that it leads to inconsistent and unphysical
result. In one case the residue of the pole has the wrong sign (necessarily
implying the presence of a tachyonic pole); in the second case the residue is
positive, but two orders of magnitude larger than the input residue, which
shows that the residue is on the verge of becoming ghostlike. This happens
because of the infrared instability of d=3 gauge theory. A possible alternative
one-loop determination via the effective action also fails. The lesson is that
gap equations must be considered at least at two-loop level.
|
[{'version': 'v1', 'created': 'Wed, 15 Oct 1997 16:57:17 GMT'}]
|
2016-08-25
|
[array(['Cornwall', 'John M.', ''], dtype=object)]
|
18,397 |
2109.12451
|
Joo-Kyung Kim
|
Joo-Kyung Kim, Guoyin Wang, Sungjin Lee, Young-Bum Kim
|
Deciding Whether to Ask Clarifying Questions in Large-Scale Spoken
Language Understanding
|
ASRU 2021
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A large-scale conversational agent can suffer from understanding user
utterances with various ambiguities such as ASR ambiguity, intent ambiguity,
and hypothesis ambiguity. When ambiguities are detected, the agent should
engage in a clarifying dialog to resolve the ambiguities before committing to
actions. However, asking clarifying questions for all the ambiguity occurrences
could lead to asking too many questions, essentially hampering the user
experience. To trigger clarifying questions only when necessary for the user
satisfaction, we propose a neural self-attentive model that leverages the
hypotheses with ambiguities and contextual signals. We conduct extensive
experiments on five common ambiguity types using real data from a large-scale
commercial conversational agent and demonstrate significant improvement over a
set of baseline approaches.
|
[{'version': 'v1', 'created': 'Sat, 25 Sep 2021 22:32:10 GMT'}]
|
2021-09-28
|
[array(['Kim', 'Joo-Kyung', ''], dtype=object)
array(['Wang', 'Guoyin', ''], dtype=object)
array(['Lee', 'Sungjin', ''], dtype=object)
array(['Kim', 'Young-Bum', ''], dtype=object)]
|
18,398 |
1912.01089
|
Zhengze Zhou
|
Zhengze Zhou, Lucas Mentch, Giles Hooker
|
$V$-statistics and Variance Estimation
|
This version supersedes the previous technical report titled
"Asymptotic Normality and Variance Estimation For Supervised Ensembles".
Extensive simulations are added and we also provide a more detailed
discussion on the bias phenomenon in variance estimation
| null | null | null |
stat.ML cs.LG stat.CO stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper develops a general framework for analyzing asymptotics of
$V$-statistics. Previous literature on limiting distribution mainly focuses on
the cases when $n \to \infty$ with fixed kernel size $k$. Under some regularity
conditions, we demonstrate asymptotic normality when $k$ grows with $n$ by
utilizing existing results for $U$-statistics. The key in our approach lies in
a mathematical reduction to $U$-statistics by designing an equivalent kernel
for $V$-statistics. We also provide a unified treatment on variance estimation
for both $U$- and $V$-statistics by observing connections to existing methods
and proposing an empirically more accurate estimator. Ensemble methods such as
random forests, where multiple base learners are trained and aggregated for
prediction purposes, serve as a running example throughout the paper because
they are a natural and flexible application of $V$-statistics.
|
[{'version': 'v1', 'created': 'Mon, 2 Dec 2019 21:42:19 GMT'}
{'version': 'v2', 'created': 'Thu, 7 May 2020 02:08:01 GMT'}]
|
2020-05-08
|
[array(['Zhou', 'Zhengze', ''], dtype=object)
array(['Mentch', 'Lucas', ''], dtype=object)
array(['Hooker', 'Giles', ''], dtype=object)]
|
18,399 |
1803.09077
|
Ferenc Simon
|
I. Gresits, Gy. Thur\'oczy, O. S\'agi, B. Gy\"ure-Garami, B. G.
M\'arkus, and F. Simon
|
Non-calorimetric determination of absorbed power during magnetic
nanoparticle based hyperthermia
|
7 pages, 3 figures+Supplementary Material (2 pages, 3 figures)
|
Scientific Reports 8, 12667 (2018)
|
10.1038/s41598-018-30981-x
| null |
physics.med-ph physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Nanomagnetic hyperthermia (NMH) is intensively studied with the prospect of
cancer therapy. A major challenge is to determine the dissipated power during
in vivo conditions and conventional methods are either invasive or inaccurate.
We present a non-calorimetric method which yields the heat absorbed during
hyperthermia: it is based on accurately measuring the quality factor change of
a resonant radio frequency circuit which is employed for the irradiation. The
approach provides the absorbed power in real-time, without the need to monitor
the sample temperature as a function of time. As such, it is free from the
problems caused by the non-adiabatic heating conditions of the usual
calorimetry. We validate the method by comparing the dissipated power with a
conventional calorimetric measurement. We present the validation for two types
of resonators with very different filling factors: a solenoid and a so-called
birdcage coil. The latter is a volume coil, which is generally used in magnetic
resonance imaging (MRI) under in vivo condition. The presented method therefore
allows to effectively combine MRI and thermotherapy and is thus readily
adaptable to existing imaging hardware.
|
[{'version': 'v1', 'created': 'Sat, 24 Mar 2018 08:46:18 GMT'}
{'version': 'v2', 'created': 'Wed, 25 Jul 2018 13:55:28 GMT'}]
|
2018-08-27
|
[array(['Gresits', 'I.', ''], dtype=object)
array(['Thuróczy', 'Gy.', ''], dtype=object)
array(['Sági', 'O.', ''], dtype=object)
array(['Gyüre-Garami', 'B.', ''], dtype=object)
array(['Márkus', 'B. G.', ''], dtype=object)
array(['Simon', 'F.', ''], dtype=object)]
|
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