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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
17,300 |
1901.09914
|
Eugene Maslov
|
Vladimir A. Koutvitsky, Eugene M. Maslov
|
Analytical study of the parametric instability of an oscillating scalar
field in an expanding universe
|
14 pages, 6 figures
|
Extended version of the paper published in J. Mathematical Physics
V. 59, 113504 (2018)
|
10.1063/1.5052341
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the dynamics of the perturbations of the inflaton scalar field
oscillating around a minimum of its effective potential in an expanding
universe. With the assumption of smallness of the ratio of the Hubble parameter
to the oscillation frequency we apply the technique of separation of fast and
slow motions. Considering the oscillation phase and the energy density as fast
and slow variables we derive the Hill equation for the fluctuation modes in
which the energy density is treated as a slowly varying parameter. We develop a
general perturbative approach to solving the equations of this type, which is
based on the Floquet theory and asymptotic expansions in the vicinity of the
solutions with the "frozen" parameters. As an example, we consider the $\phi
^{2}-\phi ^{4}$ potential and construct the approximate solutions of the
corresponding Lam\'{e} equation. The obtained solutions are found to be in a
good agreement with the results of the direct numerical integration.
|
[{'version': 'v1', 'created': 'Mon, 28 Jan 2019 11:37:06 GMT'}]
|
2019-01-30
|
[array(['Koutvitsky', 'Vladimir A.', ''], dtype=object)
array(['Maslov', 'Eugene M.', ''], dtype=object)]
|
17,301 |
2212.11668
|
Fabio Sozio
|
Fabio Sozio, Mostafa Faghih Shojaei, Arash Yavari
|
Optimal Elastostatic Cloaks
|
28 pages, 12 figures
| null |
10.1016/j.jmps.2023.105306
| null |
cs.CE cond-mat.mtrl-sci cs.NA math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An elastic cloak hides a hole or an inhomogeneity from elastic fields. In
this paper, a formulation of the optimal design of elastic cloaks based on the
adjoint state method, in which the balance of linear momentum is enforced as a
constraint, is presented. The design parameters are the elastic moduli of the
cloak, while the objective function is a measure of the distance between the
solutions in the physical and in the virtual bodies. Both the elastic medium
and the cloak are assumed to be made of isotropic linear elastic materials. In
order to guarantee smooth inhomogeneous elastic moduli within the cloak a
penalization term is added to the objective function. Mixed finite elements are
used for discretizing the weak formulation of the optimization problem. Several
numerical examples of optimal elastic cloaks designed for both single and
multiple loads are presented. We consider different geometries and loading
types and observe that in some cases the optimal elastic cloaks for cloaking
holes (cavities) are made of auxetic materials.
|
[{'version': 'v1', 'created': 'Sat, 17 Dec 2022 16:45:41 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Mar 2023 22:38:25 GMT'}]
|
2023-05-31
|
[array(['Sozio', 'Fabio', ''], dtype=object)
array(['Shojaei', 'Mostafa Faghih', ''], dtype=object)
array(['Yavari', 'Arash', ''], dtype=object)]
|
17,302 |
1710.04108
|
A. B. Balantekin
|
A.B. Balantekin (Wisconsin U., Madison)
|
Collective Neutrino Oscillations and Nucleosynthesis
|
6 pages, 1 figure, Proceedings of the OMEG17 Conference
| null |
10.1063/1.5030816
| null |
nucl-th astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The emergent phenomenon of collective neutrino oscillations arises from
neutrino-neutrino interactions in environments with very large number of
neutrinos. Since such environments are likely sites of the heavy-element
synthesis, understanding all aspects of collective neutrino oscillations seems
to be necessary for a complete accounting of nucleosynthesis. I briefly
summarize some of the salient features along with recent work on the properties
and astrophysical applications of the collective neutrino oscillations.
|
[{'version': 'v1', 'created': 'Wed, 11 Oct 2017 15:18:34 GMT'}]
|
2018-05-23
|
[array(['Balantekin', 'A. B.', '', 'Wisconsin U., Madison'], dtype=object)]
|
17,303 |
2303.18004
|
Lixin He
|
Gan Jin, ongsheng Pang, Yuyang Ji, Zujian Dai, and Lixin He
|
PYATB: An Efficient Python Package for Electronic Structure Calculations
Using Ab Initio Tight-Binding Model
| null | null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present PYATB, a Python package designed for computing band structures and
related properties of materials using the ab initio tight-binding Hamiltonian.
The Hamiltonian is directly obtained after conducting self-consistent
calculations with first-principles packages using numerical atomic orbital
(NAO) bases, such as ABACUS. The package comprises three modules: Bands,
Geometric, and Optical. In the Bands module, one can calculate essential
properties of band structures, including the partial density of states (PDOS),
fat bands, Fermi surfaces, and Weyl/Dirac points. The band unfolding method is
utilized to obtain the energy band spectra of a supercell by projecting the
electronic structure of the supercell onto the Brillouin zone of the primitive
cell. With the Geometric module, one can compute the Berry phase and Berry
curvature-related quantities, such as electric polarization, Wilson loops,
Chern numbers, and anomalous Hall conductivities. The Optical module offers a
range of optical property calculations, including optical conductivity and
nonlinear optical responses, such as shift current and Berry curvature dipole.
|
[{'version': 'v1', 'created': 'Fri, 31 Mar 2023 12:25:50 GMT'}]
|
2023-04-03
|
[array(['Jin', 'Gan', ''], dtype=object)
array(['Pang', 'ongsheng', ''], dtype=object)
array(['Ji', 'Yuyang', ''], dtype=object)
array(['Dai', 'Zujian', ''], dtype=object)
array(['He', 'Lixin', ''], dtype=object)]
|
17,304 |
1510.01122
|
Karl Rupp
|
K. Rupp, S. Balay, J. Brown, M. Knepley, L. C. McInnes, B. Smith
|
On The Evolution Of User Support Topics in Computational Science and
Engineering Software
|
2 pages, 1 figure, whitepaper for the workshop "Computational Science
& Engineering Software Sustainability and Productivity Challenges"
| null | null | null |
cs.OH cs.MS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate ten years of user support emails in the large-scale solver
library PETSc in order to identify changes in user requests. For this purpose
we assign each email thread to one or several categories describing the type of
support request. We find that despite several changes in hardware architecture
as well programming models, the relative share of emails for the individual
categories does not show a notable change over time. This is particularly
remarkable as the total communication volume has increased four-fold in the
considered time frame, indicating a considerable growth of the user base. Our
data also demonstrates that user support cannot be substituted with what is
often referred to as 'better documentation' and that the involvement of core
developers in user support is essential.
|
[{'version': 'v1', 'created': 'Mon, 5 Oct 2015 12:19:46 GMT'}]
|
2015-10-06
|
[array(['Rupp', 'K.', ''], dtype=object)
array(['Balay', 'S.', ''], dtype=object)
array(['Brown', 'J.', ''], dtype=object)
array(['Knepley', 'M.', ''], dtype=object)
array(['McInnes', 'L. C.', ''], dtype=object)
array(['Smith', 'B.', ''], dtype=object)]
|
17,305 |
2202.09696
|
Jennifer Rittenhouse West
|
Zhihong Ye, Dipangkar Dutta, Dave Gaskell, Or Hen, Dave Meekins, Dien
Nguyen, Jennifer Rittenhouse West and Lawrence Weinstein
|
SIDIS Measurement with A=3 Nuclei
|
Conference proceedings based on a talk given at the 3rd SRC-EMC
Workshop, submitted to MDPI
| null | null | null |
nucl-ex hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a new experimental effort at Jefferson Lab (JLab) to precisely
measure the ratios of charged pion electroproduction in Semi-Inclusive Deep
Inelastic Scattering (SIDIS) from $^2$D, $^3$He, and $^3$H targets
\cite{c12-21-004}. This conditionally approved experiment (C12-21-004) aims to
run in Hall-B using the standard CLAS12 configuration and a new target system
developed for the approved quasi-elastic experiment (E12-20-005). In this
data-driven study, we will measure the cross-sections as a function of ($x$,
$Q^2$, $z$, $P_T$) to allow the extraction of the unpolarized parton
distribution functions (PDFs), transverse momentum distributions (TMDs) and
fragmentation functions (FFs) in A = 3 nuclei. By using super-ratios of pion
yields of SIDIS off light nuclei over a wide $x_B$ range, we search for
evidence of a flavor dependence in the EMC effect, giving us new insights into
the effect of the nuclear environment on valance quarks. Double-ratios between
A = 3 mirror nuclei can provide a direct measurement of the d/u ratios at large
x due to their similar and well-understood nuclear corrections. With the
utilization of mirror nuclei and the large kinematic range, and high precision
of CLAS12, we will be able to maintain the sensitivity to the underlying
physics but dramatically decrease the nuclear uncertainties due to attenuation
and hadronization in heavy nuclei targets.
|
[{'version': 'v1', 'created': 'Sat, 19 Feb 2022 23:44:13 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Jun 2022 16:37:28 GMT'}
{'version': 'v3', 'created': 'Wed, 29 Jun 2022 03:17:02 GMT'}]
|
2022-06-30
|
[array(['Ye', 'Zhihong', ''], dtype=object)
array(['Dutta', 'Dipangkar', ''], dtype=object)
array(['Gaskell', 'Dave', ''], dtype=object)
array(['Hen', 'Or', ''], dtype=object)
array(['Meekins', 'Dave', ''], dtype=object)
array(['Nguyen', 'Dien', ''], dtype=object)
array(['West', 'Jennifer Rittenhouse', ''], dtype=object)
array(['Weinstein', 'Lawrence', ''], dtype=object)]
|
17,306 |
0812.1837
|
Wei Wang
|
Wei Wang and A. J. Roberts
|
Macroscopic reduction for stochastic reaction-diffusion equations
|
28 pages. Submitted
| null | null | null |
math-ph math.MP math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The macroscopic behavior of dissipative stochastic partial differential
equations usually can be described by a finite dimensional system. This article
proves that a macroscopic reduced model may be constructed for stochastic
reaction-diffusion equations with cubic nonlinearity by artificial separating
the system into two distinct slow-fast time parts. An averaging method and a
deviation estimate show that the macroscopic reduced model should be a
stochastic ordinary equation which includes the random effect transmitted from
the microscopic timescale due to the nonlinear interaction. Numerical
simulations of an example stochastic heat equation confirms the predictions of
this stochastic modelling theory. This theory empowers us to better model the
long time dynamics of complex stochastic systems.
|
[{'version': 'v1', 'created': 'Wed, 10 Dec 2008 03:39:27 GMT'}]
|
2008-12-11
|
[array(['Wang', 'Wei', ''], dtype=object)
array(['Roberts', 'A. J.', ''], dtype=object)]
|
17,307 |
1504.06532
|
Kenji Nakanishi
|
Kenji Nakanishi
|
Global dynamics below excited solitons for the nonlinear Schr\"odinger
equation with a potential
|
43 pages. A gap has been fixed in Section 8 in the case of two
non-scattering profiles, with Lemma 7.1 modified and a more general statement
(Theorem 7.2)
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Consider the nonlinear Schr\"odinger equation (NLS) with a potential with a
single negative eigenvalue. It has solitons with negative small energy, which
are asymptotically stable, and, if the nonlinearity is focusing, then also
solitons with positive large energy, which are unstable. In this paper we
classify the global dynamics below the second lowest energy of solitons under
small mass and radial symmetry constraints.
|
[{'version': 'v1', 'created': 'Fri, 24 Apr 2015 14:59:36 GMT'}
{'version': 'v2', 'created': 'Wed, 10 Feb 2016 05:14:20 GMT'}]
|
2016-02-11
|
[array(['Nakanishi', 'Kenji', ''], dtype=object)]
|
17,308 |
math/0204100
|
Jan H. Bruinier
|
Jan Hendrik Bruinier and Ulf Kuehn
|
Integrals of automorphic Green's functions associated to Heegner
divisors
|
36 pages, references updated, proofs of Theorem 4.7 and Proposition
4.8 improved
| null | null | null |
math.NT math.AG
| null |
In the present paper we find explicit formulas for the degrees of Heegner
divisors on arithmetic quotients of the orthogonal group $\Orth(2,p)$ and for
the integrals of certain automorphic Green's functions associated with Heegner
divisors. The latter quantities are important in the study of the arithmetic
degrees of Heegner divisors in the context of Arakelov geometry. In particular,
we obtain a different proof and a generalization of results of Kudla relating
these quantities to the Fourier coefficients of certain non-holomorphic
Eisenstein series of weight $1+p/2$ for the metaplectic group $\Mp_2(\Z)$.
|
[{'version': 'v1', 'created': 'Tue, 9 Apr 2002 14:59:56 GMT'}
{'version': 'v2', 'created': 'Thu, 12 Dec 2002 08:15:32 GMT'}]
|
2007-05-23
|
[array(['Bruinier', 'Jan Hendrik', ''], dtype=object)
array(['Kuehn', 'Ulf', ''], dtype=object)]
|
17,309 |
2205.01410
|
Luca Chirolli
|
Luca Chirolli, Norman Y. Yao, Joel E. Moore
|
SWAP gate between a Majorana qubit and a parity-protected
superconducting qubit
|
7 pages, 4 figures
|
Phys. Rev. Lett. 129, 177701 (2022)
|
10.1103/PhysRevLett.129.177701
| null |
cond-mat.mes-hall cond-mat.supr-con quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
High fidelity quantum information processing requires a combination of fast
gates and long-lived quantum memories. In this work, we propose a hybrid
architecture, where a parity-protected superconducting qubit is directly
coupled to a Majorana qubit, which plays the role of a quantum memory. The
superconducting qubit is based upon a $\pi$-periodic Josephson junction
realized with gate-tunable semiconducting wires, where the tunneling of
individual Cooper pairs is suppressed. One of the wires additionally contains
four Majorana zero modes that define a qubit. We demonstrate that this enables
the implementation of a SWAP gate, allowing for the transduction of quantum
information between the topological and conventional qubit. This architecture
combines fast gates, which can be realized with the superconducting qubit, with
a topologically protected Majorana memory.
|
[{'version': 'v1', 'created': 'Tue, 3 May 2022 10:41:27 GMT'}]
|
2022-11-22
|
[array(['Chirolli', 'Luca', ''], dtype=object)
array(['Yao', 'Norman Y.', ''], dtype=object)
array(['Moore', 'Joel E.', ''], dtype=object)]
|
17,310 |
1508.05982
|
Yuval Wigderson
|
Yuval Wigderson
|
The Bar-Natan Theory Splits
| null | null | null | null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that over the binary field $\mathbb F_2$, the Bar-Natan perturbation
of Khovanov homology splits as the direct sum of its two reduced theories,
which we also prove are isomorphic. This extends Shumakovitch's analogous
result for ordinary Khovanov homology, without the perturbation.
|
[{'version': 'v1', 'created': 'Mon, 24 Aug 2015 22:07:41 GMT'}]
|
2015-08-26
|
[array(['Wigderson', 'Yuval', ''], dtype=object)]
|
17,311 |
1003.3679
|
Carlos Alex Souza da Silva M.Sc
|
C.A.S. Silva and R.R. Landim
|
A note on black hole entropy, area spectrum, and evaporation
|
4 pages, 2 figures
| null |
10.1209/0295-5075/96/10007
| null |
gr-qc hep-th
|
http://creativecommons.org/licenses/publicdomain/
|
We argue that a process where a fuzzy space splits in two others can be used
to explain the origin of the black hole entropy, and why a "generalized second
law of thermodynamics" appears to hold in the presence of black holes. We reach
the Bekenstein-Hawking formula from the count of the microstates of a black
hole modeled by a fuzzy space. In this approach, a discrete area spectrum for
the black hole, which becomes increasingly spaced as the black hole approaches
the Planck scale, is obtained. We show that, as a consequence of this, the
black hole radiation becomes less and less entropic as the black hole
evaporates, in a way that some information about its initial state could be
recovered.
|
[{'version': 'v1', 'created': 'Thu, 18 Mar 2010 20:39:16 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Apr 2010 14:34:13 GMT'}]
|
2015-05-18
|
[array(['Silva', 'C. A. S.', ''], dtype=object)
array(['Landim', 'R. R.', ''], dtype=object)]
|
17,312 |
0911.5478
|
Vladimir Shevelev
|
Vladimir Shevelev
|
Three theorems on twin primes
|
17 pages. New section: "A theorem on twin primes which is independent
on observation of type 6)"
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For earlier considered our sequence A166944 in [4] we prove three statements
of its connection with twin primes. We also give a sufficient condition for the
infinity of twin primes and pose several new conjectures; among them we propose
a very simple conjectural algorithm of constructing a pair $(p,\enskip p+2)$ of
twin primes over arbitrary given integer $m\geq4$ such that $p+2\geq m.$
|
[{'version': 'v1', 'created': 'Sun, 29 Nov 2009 18:02:09 GMT'}
{'version': 'v10', 'created': 'Fri, 8 Jan 2010 20:31:49 GMT'}
{'version': 'v11', 'created': 'Mon, 11 Jan 2010 15:55:08 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Dec 2009 20:12:17 GMT'}
{'version': 'v3', 'created': 'Tue, 1 Dec 2009 21:05:10 GMT'}
{'version': 'v4', 'created': 'Thu, 3 Dec 2009 11:38:48 GMT'}
{'version': 'v5', 'created': 'Mon, 14 Dec 2009 17:40:17 GMT'}
{'version': 'v6', 'created': 'Mon, 21 Dec 2009 16:29:42 GMT'}
{'version': 'v7', 'created': 'Fri, 1 Jan 2010 19:34:31 GMT'}
{'version': 'v8', 'created': 'Wed, 6 Jan 2010 17:18:50 GMT'}
{'version': 'v9', 'created': 'Thu, 7 Jan 2010 03:03:03 GMT'}]
|
2010-01-11
|
[array(['Shevelev', 'Vladimir', ''], dtype=object)]
|
17,313 |
2306.00366
|
Tal Ben-Nun
|
Tal Ben-Nun, Berke Ates, Alexandru Calotoiu, Torsten Hoefler
|
Bridging Control-Centric and Data-Centric Optimization
|
CGO'23
| null |
10.1145/3579990.3580018
| null |
cs.PL cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the rise of specialized hardware and new programming languages, code
optimization has shifted its focus towards promoting data locality. Most
production-grade compilers adopt a control-centric mindset - instruction-driven
optimization augmented with scalar-based dataflow - whereas other approaches
provide domain-specific and general purpose data movement minimization, which
can miss important control-flow optimizations. As the two representations are
not commutable, users must choose one over the other. In this paper, we explore
how both control- and data-centric approaches can work in tandem via the
Multi-Level Intermediate Representation (MLIR) framework. Through a combination
of an MLIR dialect and specialized passes, we recover parametric, symbolic
dataflow that can be optimized within the DaCe framework. We combine the two
views into a single pipeline, called DCIR, showing that it is strictly more
powerful than either view. On several benchmarks and a real-world application
in C, we show that our proposed pipeline consistently outperforms MLIR and
automatically uncovers new optimization opportunities with no additional
effort.
|
[{'version': 'v1', 'created': 'Thu, 1 Jun 2023 05:53:35 GMT'}]
|
2023-06-02
|
[array(['Ben-Nun', 'Tal', ''], dtype=object)
array(['Ates', 'Berke', ''], dtype=object)
array(['Calotoiu', 'Alexandru', ''], dtype=object)
array(['Hoefler', 'Torsten', ''], dtype=object)]
|
17,314 |
1311.1861
|
Gustavo Guerberoff
|
Gustavo Guerberoff, Fernando Alvarez-Valin
|
A stochastic microscopic model for the dynamics of antigenic variation
|
7 pages, 5 figures
| null | null | null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel model that describes the within-host evolutionary dynamics
of parasites undergoing antigenic variation. The approach uses a multi-type
branching process with two types of entities defined according to their
relationship with the immune system: clans of resistant parasitic cells (i.e.
groups of cells sharing the same antigen not yet recognized by the immune
system) that may become sensitive, and individual sensitive cells that can
acquire a new resistance thus giving rise to the emergence of a new clan. The
simplicity of the model allows analytical treatment to determine the
subcritical and supercritical regimes in the space of parameters. By
incorporating a density-dependent mechanism the model is able to capture
additional relevant features observed in experimental data, such as the
characteristic parasitemia waves. In summary our approach provides a new
general framework to address the dynamics of antigenic variation which can be
easily adapted to cope with broader and more complex situations.
|
[{'version': 'v1', 'created': 'Fri, 8 Nov 2013 01:20:51 GMT'}
{'version': 'v2', 'created': 'Fri, 15 Nov 2013 16:26:51 GMT'}]
|
2013-11-18
|
[array(['Guerberoff', 'Gustavo', ''], dtype=object)
array(['Alvarez-Valin', 'Fernando', ''], dtype=object)]
|
17,315 |
1802.10542
|
Siddhant M. Jayakumar
|
Pablo Sprechmann, Siddhant M. Jayakumar, Jack W. Rae, Alexander
Pritzel, Adri\`a Puigdom\`enech Badia, Benigno Uria, Oriol Vinyals, Demis
Hassabis, Razvan Pascanu, Charles Blundell
|
Memory-based Parameter Adaptation
|
Published as a conference paper at ICLR 2018
| null | null | null |
stat.ML cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep neural networks have excelled on a wide range of problems, from vision
to language and game playing. Neural networks very gradually incorporate
information into weights as they process data, requiring very low learning
rates. If the training distribution shifts, the network is slow to adapt, and
when it does adapt, it typically performs badly on the training distribution
before the shift. Our method, Memory-based Parameter Adaptation, stores
examples in memory and then uses a context-based lookup to directly modify the
weights of a neural network. Much higher learning rates can be used for this
local adaptation, reneging the need for many iterations over similar data
before good predictions can be made. As our method is memory-based, it
alleviates several shortcomings of neural networks, such as catastrophic
forgetting, fast, stable acquisition of new knowledge, learning with an
imbalanced class labels, and fast learning during evaluation. We demonstrate
this on a range of supervised tasks: large-scale image classification and
language modelling.
|
[{'version': 'v1', 'created': 'Wed, 28 Feb 2018 17:21:44 GMT'}]
|
2018-03-01
|
[array(['Sprechmann', 'Pablo', ''], dtype=object)
array(['Jayakumar', 'Siddhant M.', ''], dtype=object)
array(['Rae', 'Jack W.', ''], dtype=object)
array(['Pritzel', 'Alexander', ''], dtype=object)
array(['Badia', 'Adrià Puigdomènech', ''], dtype=object)
array(['Uria', 'Benigno', ''], dtype=object)
array(['Vinyals', 'Oriol', ''], dtype=object)
array(['Hassabis', 'Demis', ''], dtype=object)
array(['Pascanu', 'Razvan', ''], dtype=object)
array(['Blundell', 'Charles', ''], dtype=object)]
|
17,316 |
1502.04627
|
Gianluca Geloni
|
Gianluca Geloni, Vitali Kocharyan and Evgeni Saldin
|
Theoretical computation of the polarization characteristics of an X-ray
Free-Electron Laser with planar undulator
| null | null |
10.1016/j.optcom.2015.07.048
|
DESY 15-021
|
physics.acc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that radiation pulses from an X-ray Free-Electron Laser (XFEL) with a
planar undulator, which are mainly polarized in the horizontal direction,
exhibit a suppression of the vertical polarization component of the power at
least by a factor $\lambda_w^2/(4 \pi L_g)^2$, where $\lambda_w$ is the length
of the undulator period and $L_g$ is the FEL field gain length. We illustrate
this fact by examining the XFEL operation under the steady state assumption. In
our calculations we considered only resonance terms: in fact, non resonance
terms are suppressed by a factor $\lambda_w^3/(4 \pi L_g)^3$ and can be
neglected. While finding a situation for making quantitative comparison between
analytical and experimental results may not be straightforward, the qualitative
aspects of the suppression of the vertical polarization rate at XFELs should be
easy to observe. We remark that our exact results can potentially be useful to
developers of new generation FEL codes for cross-checking their results.
|
[{'version': 'v1', 'created': 'Mon, 16 Feb 2015 17:03:48 GMT'}]
|
2015-09-30
|
[array(['Geloni', 'Gianluca', ''], dtype=object)
array(['Kocharyan', 'Vitali', ''], dtype=object)
array(['Saldin', 'Evgeni', ''], dtype=object)]
|
17,317 |
1812.11033
|
Qingtang Jiang
|
Haiyan Cai, Qingtang Jiang, Lin Li, and Bruce W. Suter
|
Analysis of Adaptive Short-time Fourier Transform-based Synchrosqueezing
Transform
| null | null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently the study of modeling a non-stationary signal as a superposition of
amplitude and frequency-modulated Fourier-like oscillatory modes has been a
very active research area. The synchrosqueezing transform (SST) is a powerful
method for instantaneous frequency estimation and component separation of
non-stationary multicomponent signals. The short-time Fourier transform-based
SST (FSST for short) reassigns the frequency variable to sharpen the
time-frequency representation and to separate the components of a
multicomponent non-stationary signal. Very recently the FSST with a
time-varying parameter, called the adaptive FSST, was introduced. The
simulation experiments show that the adaptive FSST is very promising in
instantaneous frequency estimation of the component of a multicomponent signal,
and in accurate component recovery. However the theoretical analysis of the
adaptive FSST has not been carried out. In this paper, we study the theoretical
analysis of the adaptive FSST and obtain the error bounds for the instantaneous
frequency estimation and component recovery with the adaptive FSST and the
2nd-order adaptive FSST.
|
[{'version': 'v1', 'created': 'Fri, 28 Dec 2018 15:17:14 GMT'}]
|
2018-12-31
|
[array(['Cai', 'Haiyan', ''], dtype=object)
array(['Jiang', 'Qingtang', ''], dtype=object)
array(['Li', 'Lin', ''], dtype=object)
array(['Suter', 'Bruce W.', ''], dtype=object)]
|
17,318 |
2011.12558
|
Tichang Lee
|
Ti-Chung Lee (Senior Member IEEE), Ying Tan (Senior Member IEEE), Iven
Mareels (Fellow, IEEE)
|
Signal Sets on Time Scales with Application to Hybrid Systems
|
8 pages, Just submitted to IEEE TAC
| null | null | null |
eess.SY cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, time scales calculus is developed to unify continuous and discrete
analysis. By extending the definition of time scales properly, this paper
introduces the concept of a signal set as well as its stability properties in
terms of the so-called pseudo distance measure. This leads to more general
Lyapunov like conditions to check stability properties of systems with hybrid
nature. By way of examples, the proposed framework is used to model hybrid
systems with simplicity and flexibility to characterize trajectories in the
behavior of hybrid systems.
|
[{'version': 'v1', 'created': 'Wed, 25 Nov 2020 07:47:24 GMT'}]
|
2020-11-26
|
[array(['Lee', 'Ti-Chung', '', 'Senior Member IEEE'], dtype=object)
array(['Tan', 'Ying', '', 'Senior Member IEEE'], dtype=object)
array(['Mareels', 'Iven', '', 'Fellow, IEEE'], dtype=object)]
|
17,319 |
1310.1515
|
Alban Sauret
|
Alban Sauret (IRPHE, HKU), Constantinos Spandagos (HKU), Ho Cheung
Shum (HKU)
|
Fluctuation-induced dynamics of multiphase liquid jets with ultra-low
interfacial tension
| null |
Lab on a Chip 12 (2013) 3380-3386
|
10.1039/c2lc40524e
| null |
physics.flu-dyn physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Control of fluid dynamics at the micrometer scale is essential to emulsion
science and materials design, which is ubiquitous in everyday life and is
frequently encountered in industrial applications. Most studies on multiphase
flow focus on oil-water systems with substantial interfacial tension. Advances
in microfluidics have enabled the study of multiphase flow with more complex
dynamics. Here, we show that the evolution of the interface in a jet surrounded
by a co-flowing continuous phase with an ultra-low interfacial tension presents
new opportunities to the control of flow morphologies. The introduction of a
harmonic perturbation to the dispersed phase leads to the formation of
interfaces with unique shapes. The periodic structures can be tuned by
controlling the fluid flow rates and the input perturbation; this demonstrates
the importance of the inertial effects in flow control at ultra-low interfacial
tension. Our work provides new insights into microfluidic flows at ultra-low
interfacial tension and their potential applications.
|
[{'version': 'v1', 'created': 'Sat, 5 Oct 2013 20:24:23 GMT'}]
|
2013-10-08
|
[array(['Sauret', 'Alban', '', 'IRPHE, HKU'], dtype=object)
array(['Spandagos', 'Constantinos', '', 'HKU'], dtype=object)
array(['Shum', 'Ho Cheung', '', 'HKU'], dtype=object)]
|
17,320 |
0805.4122
|
Fabio Nicola
|
Fabio Nicola
|
Boundedness of Fourier integral operators on Fourier Lebesgue spaces and
affine fibrations
|
13 pages
|
Studia Mathematica, vol. 198, 2010, pp. 207-219
| null | null |
math.FA math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We carry on the study of Fourier integral operators of H{\"o}rmander's type
acting on the spaces $(\mathcal{F}L^p)_{comp}$, $1\leq p\leq\infty$, of
compactly supported distributions whose Fourier transform is in $L^p$. We show
that the sharp loss of derivatives for such an operator to be bounded on these
spaces is related to the rank $r$ of the Hessian of the phase $\Phi(x,\eta)$
with respect to the space variables $x$. Indeed, we show that operators of
order $m=-r|1/2-1/p|$ are bounded on $(\mathcal{F}L^p)_{comp}$, if the mapping
$x\longmapsto\nabla_x\Phi(x,\eta)$ is constant on the fibers, of codimension
$r$, of an affine fibration.
|
[{'version': 'v1', 'created': 'Tue, 27 May 2008 13:53:17 GMT'}]
|
2015-02-19
|
[array(['Nicola', 'Fabio', ''], dtype=object)]
|
17,321 |
1512.01954
|
Candra Kurniawan
|
Candra Kurniawan and Dede Djuhana
|
Current Driven Domain Wall Depinning in Notched Permalloy Nanowires
|
6 Pages, 3 Figures, Presented in the International Symposium on
Frontier of Applied Physics (ISFAP) 2015, Will be published in American
Institute of Physics (AIP) Conference Series (Accepted)
| null |
10.1063/1.4941610
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we have investigated the domain wall (DW) depinning behavior in
the notched nanowire by a micromagnetic simulation. A transverse domain wall
(TW) was initially positioned at the center of notch and 1 ns length current
pulse was applied to depin the DW with respect to the notch size s and the wire
width variation. We have observed the depinning current density Jd which was a
minimum current to escape DW from the notch. It was found that the depinning
current density decreased as the wire width and the notch size increased. In
the depinning process, we observed the inner structure of DW generally
transformed from TW to anti-vortex wall (AVW). Interestingly, for the case of s
less than 70 nm, AVW formed and depinned closely to the period when current
pulse was active, while for s larger than 70 nm, AVW formed until the current
pulse went to zero and then depinned after flipped TW was formed. It can be
explained that the transformation of DW inner structures were affected by the
spin torque energy and contributed to DW depinning behavior from the notched
nanowires.
|
[{'version': 'v1', 'created': 'Mon, 7 Dec 2015 09:42:29 GMT'}]
|
2016-03-23
|
[array(['Kurniawan', 'Candra', ''], dtype=object)
array(['Djuhana', 'Dede', ''], dtype=object)]
|
17,322 |
1511.01341
|
Vincenzo Fiorentini
|
Andrea Urru, Giulio Cocco, Vincenzo Fiorentini
|
Tunability of the Berry phase in gapped graphene
|
5 pages, 3 composite figures
| null | null | null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
When a gap of tunable size opens at the conic band intersections of graphene,
the Berry phase does not vanish abruptly, but progressively decreases as the
gap increases. The phase depends on the reciprocal-space path radius, i.e., for
a doped system, the Fermi wave vector. The phase and its observable
consequences can thus be tuned continuously via gap opening --by a modulating
potential induced by strain, epitaxy, or nanostructuration-- and doping
adjustment.
|
[{'version': 'v1', 'created': 'Wed, 4 Nov 2015 14:17:14 GMT'}]
|
2015-11-05
|
[array(['Urru', 'Andrea', ''], dtype=object)
array(['Cocco', 'Giulio', ''], dtype=object)
array(['Fiorentini', 'Vincenzo', ''], dtype=object)]
|
17,323 |
hep-th/9804039
|
Sayan Kar
|
Sayan Kar
|
Naked singularities in low energy, effective string theory
|
21 pages, RevTex, Five PostScript Figures
|
Class.Quant.Grav.16:101-115,1999
|
10.1088/0264-9381/16/1/008
|
IUCAA-8/98
|
hep-th
| null |
Solutions to the equations of motion of the low energy, effective field
theory emerging out of compactified heterotic string theory are constructed by
making use of the well-known duality symmetries. Beginning with
four-dimensional solutions of the Einstein-massless scalar field theory in the
canonical frame we first rewrite the corresponding solutions in the string
frame. Thereafter, using the T and S duality symmetries of the low energy
string effective action we arrive at the corresponding uncharged, electrically
charged and magnetically charged solutions. Brief comments on the construction
of dual versions of the Kerr-Sen type using the dilatonic Kerr solution as the
seed are also included. Thereafter, we verify the status of the energy
conditions for the solutions in the string frame. Several of the metrics found
here are shown to possess naked singularities although the energy conditions
are obeyed. Dual solutions exhibit a duality in the conservation/violation of
the Null and Averaged Null Energy Conditions (NEC/ANEC), a fact demonstrated
earlier in the context of black holes (hep-th/9604047) and cosmologies
(hep-th/9611122). Additionally, those backgrounds which conserve the NEC/ANEC
in spite of possesing naked singularities serve as counterexamples to cosmic
censorship in the context of low energy, effective string theory.
|
[{'version': 'v1', 'created': 'Sun, 5 Apr 1998 17:37:38 GMT'}]
|
2014-11-18
|
[array(['Kar', 'Sayan', ''], dtype=object)]
|
17,324 |
2004.08950
|
Chan Park
|
Chan Park and Hyunseung Kang
|
Efficient Semiparametric Estimation of Network Treatment Effects Under
Partial Interference
| null | null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Recently, many estimators for network treatment effects have been proposed.
But, their optimality properties in terms of semiparametric efficiency have yet
to be resolved. We present a simple, yet flexible asymptotic framework to
derive the efficient influence function and the semiparametric efficiency lower
bound for a family of network causal effects under partial interference. An
important corollary of our results is that one of the existing estimators by
Liu et al. (2019) is locally efficient. We also present other estimators that
are efficient and discuss results on adaptive estimation. We conclude by using
the efficient estimators to study the direct and spillover effects of
conditional cash transfer programs in Colombia.
|
[{'version': 'v1', 'created': 'Sun, 19 Apr 2020 20:04:40 GMT'}
{'version': 'v2', 'created': 'Fri, 4 Sep 2020 15:48:28 GMT'}
{'version': 'v3', 'created': 'Thu, 25 Nov 2021 00:09:36 GMT'}]
|
2021-11-29
|
[array(['Park', 'Chan', ''], dtype=object)
array(['Kang', 'Hyunseung', ''], dtype=object)]
|
17,325 |
nlin/0409022
|
Alain Noullez
|
Alain Noullez, Sergey N. Gurbatov, Erik Aurell, Sergey I. Simdyankin
|
The global picture of self-similar and not self-similar decay in Burgers
Turbulence
|
14 pages, 19 figures
| null |
10.1103/PhysRevE.71.056305
| null |
nlin.CD
| null |
This paper continue earlier investigations on the decay of Burgers turbulence
in one dimension from Gaussian random initial conditions of the power-law
spectral type $E_0(k)\sim|k|^n$. Depending on the power $n$, different
characteristic regions are distinguished. The main focus of this paper is to
delineate the regions in wave-number $k$ and time $t$ in which self-similarity
can (and cannot) be observed, taking into account small-$k$ and large-$k$
cutoffs. The evolution of the spectrum can be inferred using physical arguments
describing the competition between the initial spectrum and the new frequencies
generated by the dynamics. For large wavenumbers, we always have $k^{-2}$
region, associated to the shocks. When $n$ is less than one, the large-scale
part of the spectrum is preserved in time and the global evolution is
self-similar, so that scaling arguments perfectly predict the behavior in time
of the energy and of the integral scale. If $n$ is larger than two, the
spectrum tends for long times to a universal scaling form independent of the
initial conditions, with universal behavior $k^2$ at small wavenumbers. In the
interval $2<n$ the leading behaviour is self-similar, independent of $n$ and
with universal behavior $k^2$ at small wavenumber. When $1<n<2$, the spectrum
has three scaling regions : first, a $|k|^n$ region at very small $k$\ms1 with
a time-independent constant, second, a $k^2$ region at intermediate
wavenumbers, finally, the usual $k^{-2}$ region. In the remaining interval,
$n<-3$ the small-$k$ cutoff dominates, and $n$ also plays no role. We find also
(numerically) the subleading term $\sim k^2$ in the evolution of the spectrum
in the interval $-3<n<1$. High-resolution numerical simulations have been
performed confirming both scaling predictions and analytical asymptotic theory.
|
[{'version': 'v1', 'created': 'Fri, 10 Sep 2004 13:43:32 GMT'}]
|
2009-11-10
|
[array(['Noullez', 'Alain', ''], dtype=object)
array(['Gurbatov', 'Sergey N.', ''], dtype=object)
array(['Aurell', 'Erik', ''], dtype=object)
array(['Simdyankin', 'Sergey I.', ''], dtype=object)]
|
17,326 |
1910.05987
|
Dominik Lachman
|
Dominik Lachman
|
Distance formulas in Bruhat-Tits building of
$\mathrm{SL}_d(\mathbb{Q}_p)$
|
22 pages
| null | null | null |
math.CO math.GR
|
http://creativecommons.org/licenses/by/4.0/
|
We study the distance on the Bruhat-Tits building of the group
$\mathrm{SL}_d(\mathbb{Q}_p)$ (and its other combinatorial properties). Coding
its vertices by certain matrix representatives, we introduce a way how to build
formulas with combinatorial meanings. In Theorem 1, we give an explicit formula
for the graph distance $\delta(\alpha,\beta)$ of two vertices $\alpha$ and
$\beta$ (without having to specify their common apartment).Our main result,
Theorem 2, then extends the distance formula to a formula for the smallest
total distance of a vertex from a given finite set of vertices. In the appendix
we consider the case of $\mathrm{SL}_2(\mathbb{Q}_p)$ and give a formula for
the number of edges shared by two given apartments.
|
[{'version': 'v1', 'created': 'Mon, 14 Oct 2019 08:48:49 GMT'}]
|
2019-10-15
|
[array(['Lachman', 'Dominik', ''], dtype=object)]
|
17,327 |
2107.06001
|
Andrew Wuensche
|
Jos\'e Manuel G\'omez Soto and Andrew Wuensche
|
The Ameyalli-Rule: Logical Universality in a 2D Cellular Automaton
|
16 pages, 15 figures
| null | null | null |
nlin.CG
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We present a new spontaneously emergent glider-gun in a 2D Cellular Automaton
and build the logical gates NOT, AND and OR required for logical universality.
The Ameyalli-rule is not based on survival/birth logic but depends on 102
isotropic neighborhood groups making an iso-rule, which can drive an
interactive input-frequency histogram for visualising iso-group activity and
dependent functions for filtering and mutation. Neutral inputs relative to
logical gates are identified which provide an idealized striped-down form of
the iso-rule.
|
[{'version': 'v1', 'created': 'Tue, 13 Jul 2021 11:51:59 GMT'}]
|
2021-07-14
|
[array(['Soto', 'José Manuel Gómez', ''], dtype=object)
array(['Wuensche', 'Andrew', ''], dtype=object)]
|
17,328 |
2211.13460
|
Ran Zhuo
|
Ran Zhuo and Yingshu L\"u
|
Qualitative properties of solutions for system involving fractional
Laplacian
| null | null | null | null |
math.AP
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
In this paper, we consider the following nonlinear system involving the
fractional Laplacian \begin{equation} \left\{\begin{array}{ll} (-\Delta)^{s} u
(x)= f(u,\,v), \\ (-\Delta)^{s} v (x)= g(u,\,v), \end{array} \right. (1)
\end{equation} in two different types of domains, one is bounded, and the other
is unbounded, where $0<s<1$. To investigate the qualitative properties of
solutions for fractional equations, the conventional methods are extension
method and moving planes method. However, the above methods have technical
limits in asymmetric and convex domains and so on. In this work, we employ the
direct sliding method for fractional Laplacian to derive the monotonicity of
solutions for (1) in $x_n$ variable in different types of domains. Meanwhile,
we develop a new iteration method for systems in the proofs which hopefully can
be applied to solve other problems.
|
[{'version': 'v1', 'created': 'Thu, 24 Nov 2022 07:54:59 GMT'}]
|
2022-11-28
|
[array(['Zhuo', 'Ran', ''], dtype=object)
array(['Lü', 'Yingshu', ''], dtype=object)]
|
17,329 |
hep-th/0312266
|
de Azcarraga Jose A.
|
I.A. Bandos, J.A. de Azcarraga, J.M. Izquierdo, M. Picon and O. Varela
|
On BPS preons, generalized holonomies and D=11 supergravities
|
11 pages, RevTeX Typos corrected, a short note and references added
|
Phys.Rev. D69 (2004) 105010
|
10.1103/PhysRevD.69.105010
| null |
hep-th
| null |
We develop the BPS preon conjecture to analyze the supersymmetric solutions
of D=11 supergravity. By relating the notions of Killing spinors and BPS
preons, we develop a moving G-frame method (G=GL(32,R), SL(32,R) or Sp(32,R))
to analyze their associated generalized holonomies. As a first application we
derive here the equations determining the generalized holonomies of k/32
supersymmetric solutions and, in particular, those solving the necessary
conditions for the existence of BPS preonic (31/32) solutions of the standard
D=11 supergravity. We also show that there exist elementary preonic solutions,
i.e. solutions preserving 31 out of 32 supersymmetries in a Chern--Simons type
supergravity. We present as well a family of worldvolume actions describing the
motion of pointlike and extended BPS preons in the background of a D'Auria-Fre
type OSp(1|32)-related supergravity model. We discuss the possible implications
for M-theory.
|
[{'version': 'v1', 'created': 'Mon, 22 Dec 2003 19:31:08 GMT'}
{'version': 'v2', 'created': 'Tue, 10 Feb 2004 15:59:01 GMT'}]
|
2009-11-10
|
[array(['Bandos', 'I. A.', ''], dtype=object)
array(['de Azcarraga', 'J. A.', ''], dtype=object)
array(['Izquierdo', 'J. M.', ''], dtype=object)
array(['Picon', 'M.', ''], dtype=object)
array(['Varela', 'O.', ''], dtype=object)]
|
17,330 |
1906.12065
|
Dmitri Gal'tsov
|
D. V. Gal'tsov and K.V. Kobialko
|
Photon trapping in static axially symmetric spacetime
|
35 pages, 11 figures
|
Phys. Rev. D 100, 104005 (2019)
|
10.1103/PhysRevD.100.104005
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, several new characteristics have been introduced to describe null
geodesic structure of strong gravitational field, such as photon regions,
transversely trapping surfaces and some generalizations. They give an
alternative and concise way to describe lensing and shadow features of compact
objects with strong gravitational field without recurring to complete
integration of the geodesic equations. Here we test this construction in the
case of the Weyl metrics when geodesic equations are non-separable, and thus
can not be integrated analytically, while the above characteristic surfaces and
regions can be described in a closed form. We develop further our formalism for
a class of static axially symmetric spacetimes introducing more detailed
specification of transversely trapping surfaces in terms of their principal
curvatures. Surprisingly, we find in the static case without spherical symmetry
certain features, such as photon regions, previously known in the Kerr space.
These photon regions can be regarded as photon spheres, "thickened" due to
oblateness of the metric.
|
[{'version': 'v1', 'created': 'Fri, 28 Jun 2019 07:23:08 GMT'}]
|
2019-11-13
|
[array(["Gal'tsov", 'D. V.', ''], dtype=object)
array(['Kobialko', 'K. V.', ''], dtype=object)]
|
17,331 |
2211.00261
|
Yue Yu
|
Yue Yu, Xuan Kan, Hejie Cui, Ran Xu, Yujia Zheng, Xiangchen Song,
Yanqiao Zhu, Kun Zhang, Razieh Nabi, Ying Guo, Chao Zhang, Carl Yang
|
Learning Task-Aware Effective Brain Connectivity for fMRI Analysis with
Graph Neural Networks
|
Work in progress
| null | null | null |
q-bio.NC cs.LG cs.NE eess.IV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Functional magnetic resonance imaging (fMRI) has become one of the most
common imaging modalities for brain function analysis. Recently, graph neural
networks (GNN) have been adopted for fMRI analysis with superior performance.
Unfortunately, traditional functional brain networks are mainly constructed
based on similarities among region of interests (ROI), which are noisy and
agnostic to the downstream prediction tasks and can lead to inferior results
for GNN-based models. To better adapt GNNs for fMRI analysis, we propose TBDS,
an end-to-end framework based on \underline{T}ask-aware \underline{B}rain
connectivity \underline{D}AG (short for Directed Acyclic Graph)
\underline{S}tructure generation for fMRI analysis. The key component of TBDS
is the brain network generator which adopts a DAG learning approach to
transform the raw time-series into task-aware brain connectivities. Besides, we
design an additional contrastive regularization to inject task-specific
knowledge during the brain network generation process. Comprehensive
experiments on two fMRI datasets, namely Adolescent Brain Cognitive Development
(ABCD) and Philadelphia Neuroimaging Cohort (PNC) datasets demonstrate the
efficacy of TBDS. In addition, the generated brain networks also highlight the
prediction-related brain regions and thus provide unique interpretations of the
prediction results. Our implementation will be published to
https://github.com/yueyu1030/TBDS upon acceptance.
|
[{'version': 'v1', 'created': 'Tue, 1 Nov 2022 03:59:54 GMT'}]
|
2022-11-02
|
[array(['Yu', 'Yue', ''], dtype=object)
array(['Kan', 'Xuan', ''], dtype=object)
array(['Cui', 'Hejie', ''], dtype=object)
array(['Xu', 'Ran', ''], dtype=object)
array(['Zheng', 'Yujia', ''], dtype=object)
array(['Song', 'Xiangchen', ''], dtype=object)
array(['Zhu', 'Yanqiao', ''], dtype=object)
array(['Zhang', 'Kun', ''], dtype=object)
array(['Nabi', 'Razieh', ''], dtype=object)
array(['Guo', 'Ying', ''], dtype=object)
array(['Zhang', 'Chao', ''], dtype=object)
array(['Yang', 'Carl', ''], dtype=object)]
|
17,332 |
2110.07095
|
Bin Shu
|
Bin Liu, Bin Shu and Xin Wen
|
Irreducible modules of $\frak {sl}_{mp}$ in characteristic $p$ with
regular or subregular nilpotent $p$-character
|
24 pages
| null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\bbk$ be an algebraically closed field of prime characteristic $p$. If
$p$ does not divide $n$, irreducible modules over $\frak {sl}_n$ for regular
and subregular nilpotent representations have already known(see \cite{Jan2} and
\cite{Jan3}). In this article, we investigate the question when $p$ divides
$n$, and precisely describe simple modules of $\frak {sl}_n$ for regular and
subregular nilpotent representations.
|
[{'version': 'v1', 'created': 'Thu, 14 Oct 2021 00:31:22 GMT'}]
|
2021-10-15
|
[array(['Liu', 'Bin', ''], dtype=object)
array(['Shu', 'Bin', ''], dtype=object)
array(['Wen', 'Xin', ''], dtype=object)]
|
17,333 |
cond-mat/9908159
|
Richard Graydon Harris
|
A.J. Berlinsky (1), D.A. Bonn (2), R. Harris (2) and C. Kallin (1)
((1) McMaster University, Canada, (2) University of British Columbia, Canada)
|
Microwave Conductivity due to Impurity Scattering in a d-wave
Superconductor
|
5 pages, 4 figures
| null |
10.1103/PhysRevB.61.9088
| null |
cond-mat.supr-con
| null |
The self-consistent t-matrix approximation for impurity scattering in
unconventional superconductors is used to interpret recent measurements of the
temperature and frequency dependence of the microwave conductivity of YBCO
crystals below 20K. In this theory, the conductivity is expressed in terms of a
fequency dependent single particle self-energy, determined by the impurity
scattering phase shift which is small for weak (Born) scattering and approaches
$\pi / 2$ for unitary scattering. Inverting this process, microwave
conductivity data are used to extract an effective single-particle self-energy
and obtain insight into the nature of the operative scattering processes. It is
found that the effective self-energy is well approximated by a constant plus a
linear term in frequency with a small positive slope for thermal quasiparticle
energies below 20K. Possible physical origins of this form of self-energy are
discussed.
|
[{'version': 'v1', 'created': 'Tue, 10 Aug 1999 23:20:42 GMT'}]
|
2009-10-31
|
[array(['Berlinsky', 'A. J.', '', 'McMaster University, Canada'],
dtype=object)
array(['Bonn', 'D. A.', '', 'University of British Columbia, Canada'],
dtype=object)
array(['Harris', 'R.', '', 'University of British Columbia, Canada'],
dtype=object)
array(['Kallin', 'C.', '', 'McMaster University, Canada'], dtype=object)]
|
17,334 |
astro-ph/0410283
|
Isaac Shlosman
|
Peter Englmaier (Astronomisches Institut, Basel) and Isaac Shlosman
(University of Kentucky)
|
Dynamical Decoupling of Nested Bars: Self-Gravitating Gaseous Nuclear
Bars
|
7 pages, 4 postscript figures. (The associated MPEG movie can be
requested from the authors directly.) Submitted to Astrophysical Journal
Letters
|
Astrophys.J. 617 (2004) L115-L118
|
10.1086/427280
| null |
astro-ph
| null |
A substantial fraction of barred galaxies host additional nuclear bars which
tumble with pattern speeds exceeding those of the large-scale (primary) stellar
bars. We have investigated the mechanism of formation and dynamical decoupling
in such nested bars which include gaseous (secondary) nuclear bars within the
full size galactic disks, hosting a double inner Lindblad resonance. Becoming
increasingly massive and self-gravitating, the nuclear bars lose internal
(circulation) angular momentum to the primary bars and increase their strength.
Developing chaos within these bars triggers a rapid gas collapse -- bar
contraction. During this time period, the secondary bar pattern speed
Omega_s~a^{-1}, where "a" stands for the bar size. As a result, Omega_s
increases dramatically until a new equilibrium is reached (if at all), while
the gas specific angular momentum decreases -- demonstrating the dynamical
decoupling of nested bars. Viscosity, and therefore the gas presence, appears
to be a necessary condition for the prograde decoupling of nested bars. This
process maintains an inflow rate of ~1 M_o/yr over ~10^8 yrs across the central
200 pc and has important implications for fueling the nuclear starbursts and
AGN.
|
[{'version': 'v1', 'created': 'Mon, 11 Oct 2004 20:05:07 GMT'}]
|
2009-11-10
|
[array(['Englmaier', 'Peter', '', 'Astronomisches Institut, Basel'],
dtype=object)
array(['Shlosman', 'Isaac', '', 'University of Kentucky'], dtype=object)]
|
17,335 |
2009.13981
|
Hardy Simgen
|
E. Aprile, J. Aalbers, F. Agostini, M. Alfonsi, L. Althueser, F. D.
Amaro, V. C. Antochi, E. Angelino, J. R. Angevaare, F. Arneodo, D. Barge, L.
Baudis, B. Bauermeister, L. Bellagamba, M. L. Benabderrahmane, T. Berger, P.
A. Breur, A. Brown, E. Brown, S. Bruenner, G. Bruno, R. Budnik, C. Capelli,
J. M. R. Cardoso, D. Cichon, B. Cimmino, M. Clark, D. Coderre, A. P. Colijn,
J. Conrad, J. P. Cussonneau, M. P. Decowski, A. Depoian, P. Di Gangi, A. Di
Giovanni, R. Di Stefano, S. Diglio, A. Elykov, G. Eurin, A. D. Ferella, W.
Fulgione, P. Gaemers, R. Gaior, A. Gallo Rosso, M. Galloway, F. Gao, L.
Grandi, M. Garbini, C. Hasterok, C. Hils, K. Hiraide, L. Hoetzsch, E.
Hogenbirk, J. Howlett, M. Iacovacci, Y. Itow, F. Joerg, N. Kato, S. Kazama,
M. Kobayashi, G. Koltman, A. Kopec, H. Landsman, R. F. Lang, L. Levinson, Q.
Lin, S. Lindemann, M. Lindner, F. Lombardi, J. A. M. Lopes, E. L\'opez Fune,
C. Macolino, J. Mahlstedt, L. Manenti, A. Manfredini, F. Marignetti, T.
Marrod\'an Undagoitia, K. Martens, J. Masbou, D. Masson, S. Mastroianni, M.
Messina, K. Miuchi, A. Molinario, K. Mor{\aa}, S. Moriyama, Y. Mosbacher, M.
Murra, J. Naganoma, K. Ni, U. Oberlack, K. Odgers, J. Palacio, B. Pelssers,
R. Peres, J. Pienaar, V. Pizzella, G. Plante, J. Qin, H. Qiu, D. Ram\'irez
Garc\'ia, S. Reichard, A. Rocchetti, N. Rupp, J. M. F. dos Santos, G.
Sartorelli, N. \v{S}ar\v{c}evi\'c, M. Scheibelhut, S. Schindler, J.
Schreiner, D. Schulte, M. Schumann, L. Scotto Lavina, M. Selvi, F. Semeria,
P. Shagin, E. Shockley, M. Silva, H. Simgen, A. Takeda, C. Therreau, D.
Thers, F. Toschi, G. Trinchero, C. Tunnell, M. Vargas, G. Volta, O. Wack, H.
Wang, Y. Wei, C. Weinheimer, M.Weiss, D. Wenz, J. Westermann, C. Wittweg, J.
Wulf, Z. Xu, M. Yamashita, J. Ye, G. Zavattini, Y. Zhang, T. Zhu, J. P.
Zopounidis
|
$^{222}$Rn emanation measurements for the XENON1T experiment
|
14 pages, 3 figures
|
Eur. Phys. J. C 81, 337 (2021)
|
10.1140/epjc/s10052-020-08777-z
| null |
physics.ins-det hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The selection of low-radioactive construction materials is of utmost
importance for the success of low-energy rare event search experiments. Besides
radioactive contaminants in the bulk, the emanation of radioactive radon atoms
from material surfaces attains increasing relevance in the effort to further
reduce the background of such experiments. In this work, we present the
$^{222}$Rn emanation measurements performed for the XENON1T dark matter
experiment. Together with the bulk impurity screening campaign, the results
enabled us to select the radio-purest construction materials, targeting a
$^{222}$Rn activity concentration of 10 $\mu$Bq/kg in 3.2 t of xenon. The
knowledge of the distribution of the $^{222}$Rn sources allowed us to
selectively eliminate critical components in the course of the experiment. The
predictions from the emanation measurements were compared to data of the
$^{222}$Rn activity concentration in XENON1T. The final $^{222}$Rn activity
concentration of (4.5 $\pm$ 0.1) $\mu$Bq/kg in the target of XENON1T is the
lowest ever achieved in a xenon dark matter experiment.
|
[{'version': 'v1', 'created': 'Tue, 29 Sep 2020 13:03:11 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Sep 2020 11:51:55 GMT'}
{'version': 'v3', 'created': 'Wed, 25 Nov 2020 20:56:29 GMT'}]
|
2022-02-04
|
[array(['Aprile', 'E.', ''], dtype=object)
array(['Aalbers', 'J.', ''], dtype=object)
array(['Agostini', 'F.', ''], dtype=object)
array(['Alfonsi', 'M.', ''], dtype=object)
array(['Althueser', 'L.', ''], dtype=object)
array(['Amaro', 'F. D.', ''], dtype=object)
array(['Antochi', 'V. C.', ''], dtype=object)
array(['Angelino', 'E.', ''], dtype=object)
array(['Angevaare', 'J. R.', ''], dtype=object)
array(['Arneodo', 'F.', ''], dtype=object)
array(['Barge', 'D.', ''], dtype=object)
array(['Baudis', 'L.', ''], dtype=object)
array(['Bauermeister', 'B.', ''], dtype=object)
array(['Bellagamba', 'L.', ''], dtype=object)
array(['Benabderrahmane', 'M. L.', ''], dtype=object)
array(['Berger', 'T.', ''], dtype=object)
array(['Breur', 'P. A.', ''], dtype=object)
array(['Brown', 'A.', ''], dtype=object)
array(['Brown', 'E.', ''], dtype=object)
array(['Bruenner', 'S.', ''], dtype=object)
array(['Bruno', 'G.', ''], dtype=object)
array(['Budnik', 'R.', ''], dtype=object)
array(['Capelli', 'C.', ''], dtype=object)
array(['Cardoso', 'J. M. R.', ''], dtype=object)
array(['Cichon', 'D.', ''], dtype=object)
array(['Cimmino', 'B.', ''], dtype=object)
array(['Clark', 'M.', ''], dtype=object)
array(['Coderre', 'D.', ''], dtype=object)
array(['Colijn', 'A. P.', ''], dtype=object)
array(['Conrad', 'J.', ''], dtype=object)
array(['Cussonneau', 'J. P.', ''], dtype=object)
array(['Decowski', 'M. P.', ''], dtype=object)
array(['Depoian', 'A.', ''], dtype=object)
array(['Di Gangi', 'P.', ''], dtype=object)
array(['Di Giovanni', 'A.', ''], dtype=object)
array(['Di Stefano', 'R.', ''], dtype=object)
array(['Diglio', 'S.', ''], dtype=object)
array(['Elykov', 'A.', ''], dtype=object)
array(['Eurin', 'G.', ''], dtype=object)
array(['Ferella', 'A. D.', ''], dtype=object)
array(['Fulgione', 'W.', ''], dtype=object)
array(['Gaemers', 'P.', ''], dtype=object)
array(['Gaior', 'R.', ''], dtype=object)
array(['Rosso', 'A. Gallo', ''], dtype=object)
array(['Galloway', 'M.', ''], dtype=object)
array(['Gao', 'F.', ''], dtype=object)
array(['Grandi', 'L.', ''], dtype=object)
array(['Garbini', 'M.', ''], dtype=object)
array(['Hasterok', 'C.', ''], dtype=object)
array(['Hils', 'C.', ''], dtype=object)
array(['Hiraide', 'K.', ''], dtype=object)
array(['Hoetzsch', 'L.', ''], dtype=object)
array(['Hogenbirk', 'E.', ''], dtype=object)
array(['Howlett', 'J.', ''], dtype=object)
array(['Iacovacci', 'M.', ''], dtype=object)
array(['Itow', 'Y.', ''], dtype=object)
array(['Joerg', 'F.', ''], dtype=object)
array(['Kato', 'N.', ''], dtype=object)
array(['Kazama', 'S.', ''], dtype=object)
array(['Kobayashi', 'M.', ''], dtype=object)
array(['Koltman', 'G.', ''], dtype=object)
array(['Kopec', 'A.', ''], dtype=object)
array(['Landsman', 'H.', ''], dtype=object)
array(['Lang', 'R. F.', ''], dtype=object)
array(['Levinson', 'L.', ''], dtype=object)
array(['Lin', 'Q.', ''], dtype=object)
array(['Lindemann', 'S.', ''], dtype=object)
array(['Lindner', 'M.', ''], dtype=object)
array(['Lombardi', 'F.', ''], dtype=object)
array(['Lopes', 'J. A. M.', ''], dtype=object)
array(['Fune', 'E. López', ''], dtype=object)
array(['Macolino', 'C.', ''], dtype=object)
array(['Mahlstedt', 'J.', ''], dtype=object)
array(['Manenti', 'L.', ''], dtype=object)
array(['Manfredini', 'A.', ''], dtype=object)
array(['Marignetti', 'F.', ''], dtype=object)
array(['Undagoitia', 'T. Marrodán', ''], dtype=object)
array(['Martens', 'K.', ''], dtype=object)
array(['Masbou', 'J.', ''], dtype=object)
array(['Masson', 'D.', ''], dtype=object)
array(['Mastroianni', 'S.', ''], dtype=object)
array(['Messina', 'M.', ''], dtype=object)
array(['Miuchi', 'K.', ''], dtype=object)
array(['Molinario', 'A.', ''], dtype=object)
array(['Morå', 'K.', ''], dtype=object)
array(['Moriyama', 'S.', ''], dtype=object)
array(['Mosbacher', 'Y.', ''], dtype=object)
array(['Murra', 'M.', ''], dtype=object)
array(['Naganoma', 'J.', ''], dtype=object)
array(['Ni', 'K.', ''], dtype=object)
array(['Oberlack', 'U.', ''], dtype=object)
array(['Odgers', 'K.', ''], dtype=object)
array(['Palacio', 'J.', ''], dtype=object)
array(['Pelssers', 'B.', ''], dtype=object)
array(['Peres', 'R.', ''], dtype=object)
array(['Pienaar', 'J.', ''], dtype=object)
array(['Pizzella', 'V.', ''], dtype=object)
array(['Plante', 'G.', ''], dtype=object)
array(['Qin', 'J.', ''], dtype=object)
array(['Qiu', 'H.', ''], dtype=object)
array(['García', 'D. Ramírez', ''], dtype=object)
array(['Reichard', 'S.', ''], dtype=object)
array(['Rocchetti', 'A.', ''], dtype=object)
array(['Rupp', 'N.', ''], dtype=object)
array(['Santos', 'J. M. F. dos', ''], dtype=object)
array(['Sartorelli', 'G.', ''], dtype=object)
array(['Šarčević', 'N.', ''], dtype=object)
array(['Scheibelhut', 'M.', ''], dtype=object)
array(['Schindler', 'S.', ''], dtype=object)
array(['Schreiner', 'J.', ''], dtype=object)
array(['Schulte', 'D.', ''], dtype=object)
array(['Schumann', 'M.', ''], dtype=object)
array(['Lavina', 'L. Scotto', ''], dtype=object)
array(['Selvi', 'M.', ''], dtype=object)
array(['Semeria', 'F.', ''], dtype=object)
array(['Shagin', 'P.', ''], dtype=object)
array(['Shockley', 'E.', ''], dtype=object)
array(['Silva', 'M.', ''], dtype=object)
array(['Simgen', 'H.', ''], dtype=object)
array(['Takeda', 'A.', ''], dtype=object)
array(['Therreau', 'C.', ''], dtype=object)
array(['Thers', 'D.', ''], dtype=object)
array(['Toschi', 'F.', ''], dtype=object)
array(['Trinchero', 'G.', ''], dtype=object)
array(['Tunnell', 'C.', ''], dtype=object)
array(['Vargas', 'M.', ''], dtype=object)
array(['Volta', 'G.', ''], dtype=object)
array(['Wack', 'O.', ''], dtype=object)
array(['Wang', 'H.', ''], dtype=object)
array(['Wei', 'Y.', ''], dtype=object)
array(['Weinheimer', 'C.', ''], dtype=object)
array(['Weiss', 'M.', ''], dtype=object)
array(['Wenz', 'D.', ''], dtype=object)
array(['Westermann', 'J.', ''], dtype=object)
array(['Wittweg', 'C.', ''], dtype=object)
array(['Wulf', 'J.', ''], dtype=object)
array(['Xu', 'Z.', ''], dtype=object)
array(['Yamashita', 'M.', ''], dtype=object)
array(['Ye', 'J.', ''], dtype=object)
array(['Zavattini', 'G.', ''], dtype=object)
array(['Zhang', 'Y.', ''], dtype=object)
array(['Zhu', 'T.', ''], dtype=object)
array(['Zopounidis', 'J. P.', ''], dtype=object)]
|
17,336 |
2109.01566
|
Alex Dytso
|
Luca Barletta and Alex Dytso
|
Scalar Gaussian Wiretap Channel: Properties of the Support Size of the
Secrecy-Capacity-Achieving Distribution
|
This is an extended version of a paper accepted to 2021 IEEE
Information Theory Workshop (ITW)
| null | null | null |
cs.IT math.IT
|
http://creativecommons.org/licenses/by/4.0/
|
This work studies the secrecy-capacity of a scalar-Gaussian wiretap channel
with an amplitude constraint on the input. It is known that for this channel,
the secrecy-capacity-achieving distribution is discrete with finitely many
points. This work improves such result by showing an upper bound of the order
$\frac{\mathsf{A}}{\sigma_1^2}$ where $\mathsf{A}$ is the amplitude constraint
and $\sigma_1^2$ is the variance of the Gaussian noise over the legitimate
channel.
|
[{'version': 'v1', 'created': 'Fri, 3 Sep 2021 14:37:49 GMT'}]
|
2021-09-06
|
[array(['Barletta', 'Luca', ''], dtype=object)
array(['Dytso', 'Alex', ''], dtype=object)]
|
17,337 |
2012.11899
|
Zheng Li
|
Ming Zhang, Shuqiao Zhang, Haitan Xu, Hankai Zhang, Xiangxu Mu, R. J.
Dwayne Miller, Anatoly Ischenko, Oriol Vendrell, Zheng Li
|
Tomographic imaging of complete quantum state of matter by ultrafast
diffraction
|
35 pages, 5 figures, 6 supplementary figures
| null | null | null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
With the ability to directly obtain the Wigner function and density matrix of
photon states, quantum tomography (QT) has had a significant impact on quantum
optics, quantum computing and quantum information. By an appropriate sequence
of measurements on the evolution of each degreeof freedom (DOF), the full
quantum state of the observed photonic system can be determined. The first
proposal to extend the application of QT to reconstruction of complete quantum
states of matter wavepackets had generated enormous interest in ultrafast
diffraction imaging and pump-probe spectroscopy of molecules. This interest was
elevated with the advent of ultrafast electron and X-ray diffraction techniques
using electron accelerators and X-ray free electron lasers to add temporal
resolution to the observed nuclear and electron distributions. However, the
great interest in this area has been tempered by the illustration of an
impossibility theorem, known as the dimension problem. Not being able to
associate unitary evolution to every DOF of molecular motion, quantum
tomography could not be used beyond 1D and categorically excludes most
vibrational and all rotational motion of molecules. Here we present a
theoretical advance to overcome the notorious dimension problem. Solving this
challenging problem is important to push imaging molecular dynamics to the
quantum limit. The new theory has solved this problem, which makes quantum
tomography a truly useful methodology in ultrafast physics and enables the
making of quantum version of a molecular movie. With the new theory, quantum
tomography can be finally advanced to a sufficient level to become a general
method for reconstructing quantum states of matter, without being limited in
one dimension. Our new concept is demonstrated using a simulated dataset of
ultrafast diffraction experiment of laser-aligned nitrogen molecules.
|
[{'version': 'v1', 'created': 'Tue, 22 Dec 2020 09:52:48 GMT'}]
|
2020-12-23
|
[array(['Zhang', 'Ming', ''], dtype=object)
array(['Zhang', 'Shuqiao', ''], dtype=object)
array(['Xu', 'Haitan', ''], dtype=object)
array(['Zhang', 'Hankai', ''], dtype=object)
array(['Mu', 'Xiangxu', ''], dtype=object)
array(['Miller', 'R. J. Dwayne', ''], dtype=object)
array(['Ischenko', 'Anatoly', ''], dtype=object)
array(['Vendrell', 'Oriol', ''], dtype=object)
array(['Li', 'Zheng', ''], dtype=object)]
|
17,338 |
1809.08931
|
Liang Yan
|
Liang Yan, Tao Zhou
|
An adaptive multi-fidelity PC-based ensemble Kalman inversion for
inverse problems
|
arXiv admin note: text overlap with arXiv:1807.00618
| null | null | null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The ensemble Kalman inversion (EKI), as a derivative-free methodology, has
been widely used in the parameter estimation of inverse problems.
Unfortunately, its cost may become moderately large for systems described by
high dimensional nonlinear PDEs, as EKI requires a relatively large ensemble
size to guarantee its performance. In this paper, we propose an adaptive
multi-fidelity polynomial chaos (PC) based EKI technique to address this
challenge. Our new strategy combines a large number of low-order PC surrogate
model evaluations and a small number of high-fidelity forward model
evaluations, yielding a multi-fidelity approach. Especially, we present a new
approach that adaptively constructs and refines a multi-fidelity PC surrogate
during the EKI simulation. Since the forward model evaluations are only
required for updating the low-order multi-fidelity PC model, whose number can
be much smaller than the total ensemble size of the classic EKI, the entire
computational costs are thus significantly reduced. The new algorithm was
tested through the two-dimensional time fractional inverse diffusion problems
and demonstrated great effectiveness in comparison with PC based EKI and
classic EKI.
|
[{'version': 'v1', 'created': 'Fri, 21 Sep 2018 11:01:52 GMT'}]
|
2018-09-25
|
[array(['Yan', 'Liang', ''], dtype=object)
array(['Zhou', 'Tao', ''], dtype=object)]
|
17,339 |
nucl-th/9910072
|
Dr. B. Krippa
|
B.Krippa
|
Chiral NN interaction in nuclear matter
|
7 pages, Revtex, Talk given on the International Workshop on Hadron
Physics "Effective Theories of Low Energy QCD", Coimbra, Portugal, September
10 - 15, 1999
| null | null |
VU - 99 - 10
|
nucl-th hep-ph
| null |
The effective field theory of NN interactions in nuclear matter is
considered. Due to the Pauli principle the effective NN amplitude is not
affected by the shallow bound states. We show that the next-to-leading order
terms in the chiral expansion of the effective NN potential can be interpreted
as corrections so the expansion is systematic. The value of potential energy
per particle is calculated and some issues concerning the chiral effective
theory of nuclear matter are outlined.
|
[{'version': 'v1', 'created': 'Thu, 28 Oct 1999 16:27:36 GMT'}]
|
2007-05-23
|
[array(['Krippa', 'B.', ''], dtype=object)]
|
17,340 |
cond-mat/0301350
|
Winfried Koller
|
Winfried Koller, Alexander Pr\"ull, Hans Gerd Evertz, and Wolfgang von
der Linden
|
Magnetic Polarons in the 1D FM Kondo Model
|
11 pages, 9 figures included, additional refs added
|
Phys. Rev. B 67 174418 (2003)
|
10.1103/PhysRevB.67.174418
| null |
cond-mat.str-el
| null |
The ferromagnetic Kondo model with classical corespins is studied via
unbiased Monte-Carlo simulations. We show that with realistic parameters for
the manganites and at low temperatures, the double-exchange mechanism does not
lead to phase separation in one-dimensional chains but rather stabilizes
individual ferromagnetic polarons. Within the ferromagnetic polaron picture,
the pseudogap in the one-particle spectral function A_k(\omega) can easily be
explained. Ferromagnetic polarons also clear up a seeming failure of the
double-exchange mechanism in explaining the comparable bandwidths in the
ferromagnetic and paramagnetic phase. For our analysis, we extend a simplified
model, the finite temperature uniform hopping approach (UHA), to include
polarons. It can easily be evaluated numerically and provides a simple
quantitative understanding of the physical features of the ferromagnetic Kondo
model.
|
[{'version': 'v1', 'created': 'Mon, 20 Jan 2003 13:39:38 GMT'}
{'version': 'v2', 'created': 'Thu, 23 Jan 2003 13:44:47 GMT'}]
|
2016-08-16
|
[array(['Koller', 'Winfried', ''], dtype=object)
array(['Prüll', 'Alexander', ''], dtype=object)
array(['Evertz', 'Hans Gerd', ''], dtype=object)
array(['von der Linden', 'Wolfgang', ''], dtype=object)]
|
17,341 |
1511.06608
|
Ambro\v{z} Kregar
|
A. Kregar, J. H. Jefferson, A. Ramsak
|
Arbitrary qubit transformations on tuneable Rashba rings
| null |
Phys. Rev. B 93, 075432 (2016)
|
10.1103/PhysRevB.93.075432
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
An exact solution is presented for the time-dependent wavefunction of a
Kramers doublet which propagates around a quantum ring with tuneable Rashba
spin-orbit interaction. By propagating in segments it is shown that
Kramers-doublet qubits may be defined for which transformations on the Bloch
sphere may be performed for an integral number of revolutions around the ring.
The conditions for full coverage of the Bloch sphere are determined and
explained in terms of sequential qubit rotations due to electron motion along
the segments, with change of rotation axes between segments due to adiabatic
changes in the Rashba spin-orbit interaction. Prospects and challenges for
possible realizations are discussed for which rings based on InAs quantum wires
are promising candidates.
|
[{'version': 'v1', 'created': 'Fri, 20 Nov 2015 14:25:05 GMT'}]
|
2016-02-26
|
[array(['Kregar', 'A.', ''], dtype=object)
array(['Jefferson', 'J. H.', ''], dtype=object)
array(['Ramsak', 'A.', ''], dtype=object)]
|
17,342 |
1703.06696
|
Joanes Lizarraga
|
Mark Hindmarsh, Joanes Lizarraga, Jon Urrestilla, David Daverio,
Martin Kunz
|
Scaling from gauge and scalar radiation in Abelian Higgs string networks
|
19 pages, 12 figures. v2: typos fixed and video link added
https://vimeo.com/214671412 . v3: minor changes, matches published version
|
Phys. Rev. D 96, 023525 (2017)
|
10.1103/PhysRevD.96.023525
| null |
astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate cosmic string networks in the Abelian Higgs model using data
from a campaign of large-scale numerical simulations on lattices of up to
$4096^3$ grid points. We observe scaling or self-similarity of the networks
over a wide range of scales, and estimate the asymptotic values of the mean
string separation in horizon length units $\dot{\xi}$ and of the mean square
string velocity $\bar v^2$ in the continuum and large time limits. The scaling
occurs because the strings lose energy into classical radiation of the scalar
and gauge fields of the Abelian Higgs model. We quantify the energy loss with a
dimensionless radiative efficiency parameter, and show that it does not vary
significantly with lattice spacing or string separation. This implies that the
radiative energy loss underlying the scaling behaviour is not a lattice
artefact, and justifies the extrapolation of measured network properties to
large times for computations of cosmological perturbations. We also show that
the core growth method, which increases the defect core width with time to
extend the dynamic range of simulations, does not introduce significant
systematic error. We compare $\dot{\xi}$ and $\bar v^2$ to values measured in
simulations using the Nambu-Goto approximation, finding that the latter
underestimate the mean string separation by about 25%, and overestimate $\bar
v^2$ by about 10%. The scaling of the string separation implies that string
loops decay by the emission of massive radiation within a Hubble time in field
theory simulations, in contrast to the Nambu-Goto scenario which neglects this
energy loss mechanism. String loops surviving for only one Hubble time emit
much less gravitational radiation than in the Nambu-Goto scenario, and are
consequently subject to much weaker gravitational wave constraints on their
tension.
|
[{'version': 'v1', 'created': 'Mon, 20 Mar 2017 11:58:37 GMT'}
{'version': 'v2', 'created': 'Wed, 3 May 2017 10:27:42 GMT'}
{'version': 'v3', 'created': 'Mon, 21 Aug 2017 09:14:34 GMT'}]
|
2017-08-22
|
[array(['Hindmarsh', 'Mark', ''], dtype=object)
array(['Lizarraga', 'Joanes', ''], dtype=object)
array(['Urrestilla', 'Jon', ''], dtype=object)
array(['Daverio', 'David', ''], dtype=object)
array(['Kunz', 'Martin', ''], dtype=object)]
|
17,343 |
1409.7771
|
Chinmoy Dutta
|
Chinmoy Dutta and Gopal Pandurangan and Rajmohan Rajaraman and Zhifeng
Sun and Emanuele Viola
|
Global Information Sharing under Network Dynamics
|
arXiv admin note: substantial text overlap with arXiv:1112.0384
| null | null | null |
cs.DC cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study how to spread $k$ tokens of information to every node on an $n$-node
dynamic network, the edges of which are changing at each round. This basic {\em
gossip problem} can be completed in $O(n + k)$ rounds in any static network,
and determining its complexity in dynamic networks is central to understanding
the algorithmic limits and capabilities of various dynamic network models. Our
focus is on token-forwarding algorithms, which do not manipulate tokens in any
way other than storing, copying and forwarding them.
We first consider the {\em strongly adaptive} adversary model where in each
round, each node first chooses a token to broadcast to all its neighbors
(without knowing who they are), and then an adversary chooses an arbitrary
connected communication network for that round with the knowledge of the tokens
chosen by each node. We show that $\Omega(nk/\log n + n)$ rounds are needed for
any randomized (centralized or distributed) token-forwarding algorithm to
disseminate the $k$ tokens, thus resolving an open problem raised
in~\cite{kuhn+lo:dynamic}. The bound applies to a wide class of initial token
distributions, including those in which each token is held by exactly one node
and {\em well-mixed} ones in which each node has each token independently with
a constant probability.
We also show several upper bounds in varying models.
|
[{'version': 'v1', 'created': 'Sat, 27 Sep 2014 06:36:19 GMT'}]
|
2014-09-30
|
[array(['Dutta', 'Chinmoy', ''], dtype=object)
array(['Pandurangan', 'Gopal', ''], dtype=object)
array(['Rajaraman', 'Rajmohan', ''], dtype=object)
array(['Sun', 'Zhifeng', ''], dtype=object)
array(['Viola', 'Emanuele', ''], dtype=object)]
|
17,344 |
2103.11419
|
Thang Pham
|
Doowon Koh, Sujin Lee, Thang Pham, and Chun-Yen Shen
|
Configurations of rectangles in a set in $\mathbb{F}_q^2$
|
11 pages
| null | null | null |
math.CO math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\mathbb{F}_q$ be a finite field of order $q$. In this paper, we study
the distribution of rectangles in a given set in $\mathbb{F}_q^2$. More
precisely, for any $0<\delta\le 1$, we prove that there exists an integer
$q_0=q_0(\delta)$ with the following property: if $q\ge q_0$ and $A$ is a
multiplicative subgroup of $\mathbb{F}^*_q$ with $|A|\ge q^{2/3}$, then any set
$S\subset \mathbb{F}_q^2$ with $|S|\ge \delta q^2$ contains at least $\gg
\frac{|S|^4|A|^2}{q^5}$ rectangles with side-lengths in $A$. We also consider
the case of rectangles with one fixed side-length and the other in a
multiplicative subgroup $A$.
|
[{'version': 'v1', 'created': 'Sun, 21 Mar 2021 15:15:53 GMT'}
{'version': 'v2', 'created': 'Thu, 6 May 2021 16:11:29 GMT'}
{'version': 'v3', 'created': 'Sat, 25 Sep 2021 07:50:51 GMT'}]
|
2021-09-28
|
[array(['Koh', 'Doowon', ''], dtype=object)
array(['Lee', 'Sujin', ''], dtype=object)
array(['Pham', 'Thang', ''], dtype=object)
array(['Shen', 'Chun-Yen', ''], dtype=object)]
|
17,345 |
1908.01135
|
Simina Br\^anzei
|
Simina Br\^anzei and Yuval Peres
|
Multiplayer Bandit Learning, from Competition to Cooperation
|
41 pages, 5 figures
| null | null | null |
cs.GT cs.LG econ.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The stochastic multi-armed bandit model captures the tradeoff between
exploration and exploitation. We study the effects of competition and
cooperation on this tradeoff. Suppose there are $k$ arms and two players, Alice
and Bob. In every round, each player pulls an arm, receives the resulting
reward, and observes the choice of the other player but not their reward.
Alice's utility is $\Gamma_A + \lambda \Gamma_B$ (and similarly for Bob), where
$\Gamma_A$ is Alice's total reward and $\lambda \in [-1, 1]$ is a cooperation
parameter. At $\lambda = -1$ the players are competing in a zero-sum game, at
$\lambda = 1$, they are fully cooperating, and at $\lambda = 0$, they are
neutral: each player's utility is their own reward. The model is related to the
economics literature on strategic experimentation, where usually players
observe each other's rewards.
With discount factor $\beta$, the Gittins index reduces the one-player
problem to the comparison between a risky arm, with a prior $\mu$, and a
predictable arm, with success probability $p$. The value of $p$ where the
player is indifferent between the arms is the Gittins index $g = g(\mu,\beta) >
m$, where $m$ is the mean of the risky arm.
We show that competing players explore less than a single player: there is
$p^* \in (m, g)$ so that for all $p > p^*$, the players stay at the predictable
arm. However, the players are not myopic: they still explore for some $p > m$.
On the other hand, cooperating players explore more than a single player. We
also show that neutral players learn from each other, receiving strictly higher
total rewards than they would playing alone, for all $ p\in (p^*, g)$, where
$p^*$ is the threshold from the competing case.
Finally, we show that competing and neutral players eventually settle on the
same arm in every Nash equilibrium, while this can fail for cooperating
players.
|
[{'version': 'v1', 'created': 'Sat, 3 Aug 2019 08:20:54 GMT'}
{'version': 'v2', 'created': 'Fri, 11 Oct 2019 04:19:36 GMT'}]
|
2019-10-14
|
[array(['Brânzei', 'Simina', ''], dtype=object)
array(['Peres', 'Yuval', ''], dtype=object)]
|
17,346 |
1607.08343
|
Jianchuan Zheng
|
Jianchuan Zheng, Zhiliang Yang, Kaiming Guo, Haimin Wang, Shuo Wang
|
On the Rotation of Sunspots and Their Magnetic Polarity
|
25 pages, 23 figures, 2 tables. Accepted for publication in ApJ
| null |
10.3847/0004-637X/826/1/6
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The rotation of sunspots of 2 yr in two different solar cycles is studied
with the data from the Helioseismic and Magnetic Imager on board the \it Solar
Dynamics Observatory \rm and the Michelson Doppler Imager instrument on board
the \it Solar and Heliospheric Observataory.\rm We choose the $\alpha$ sunspot
groups and the relatively large and stable sunspots of complex active regions
in our sample. In the year of 2003, the $\alpha$ sunspot groups and the
preceding sunspots tend to rotate counterclockwise and have positive magnetic
polarity in the northern hemisphere. In the southern hemisphere, the magnetic
polarity and rotational tendency of the $\alpha$ sunspot groups and the
preceding sunspots are opposite to the northern hemisphere. The average
rotational speed of these sunspots in 2003 is about $0^{\circ}.65 \rm \
hr^{-1}$. From 2014 January to 2015 February, the $\alpha$ sunspot groups and
the preceding sunspots tend to rotate clockwise and have negative magnetic
polarity in the northern hemisphere. The patterns of rotation and magnetic
polarity of the southern hemisphere are also opposite to those of the northern
hemisphere. The average rotational speed of these sunspots in 2014/2015 is
about $1^{\circ}.49 \rm \ hr^{-1}$. The rotation of the relatively large and
stable preceding sunspots and that of the $\alpha$ sunspot groups located in
the same hemisphere have opposite rotational direction in 2003 and 2014/2015.
|
[{'version': 'v1', 'created': 'Thu, 28 Jul 2016 08:02:27 GMT'}]
|
2016-07-29
|
[array(['Zheng', 'Jianchuan', ''], dtype=object)
array(['Yang', 'Zhiliang', ''], dtype=object)
array(['Guo', 'Kaiming', ''], dtype=object)
array(['Wang', 'Haimin', ''], dtype=object)
array(['Wang', 'Shuo', ''], dtype=object)]
|
17,347 |
hep-th/9206064
|
Robert C. Myers
|
Rene Lafrance and Robert Myers
|
What unitary matrix models are not?
|
9 pages (use jnl)
|
Phys. Rev. D 47, 4785 (1993)
|
10.1103/PhysRevD.47.4785
|
McGill/92--25
|
hep-th
| null |
We report results of two investigations of the double-scaling equations for
the unitary matrix models. First, the fixed area partition functions have all
positive coefficients only for the first four critical points. This implies
that the critical points at $k\ge5$ describe non-unitary continuum theories.
Secondly, we examine a conjectured connection to branched polymers, but find
that the scaling solutions of the unitary models do not agree with those of a
particular model describing branched polymers.
|
[{'version': 'v1', 'created': 'Tue, 16 Jun 1992 17:41:14 GMT'}]
|
2013-11-13
|
[array(['Lafrance', 'Rene', ''], dtype=object)
array(['Myers', 'Robert', ''], dtype=object)]
|
17,348 |
1908.09961
|
Kien Do
|
Kien Do and Truyen Tran
|
Theory and Evaluation Metrics for Learning Disentangled Representations
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We make two theoretical contributions to disentanglement learning by (a)
defining precise semantics of disentangled representations, and (b)
establishing robust metrics for evaluation. First, we characterize the concept
"disentangled representations" used in supervised and unsupervised methods
along three dimensions-informativeness, separability and interpretability -
which can be expressed and quantified explicitly using information-theoretic
constructs. This helps explain the behaviors of several well-known
disentanglement learning models. We then propose robust metrics for measuring
informativeness, separability and interpretability. Through a comprehensive
suite of experiments, we show that our metrics correctly characterize the
representations learned by different methods and are consistent with
qualitative (visual) results. Thus, the metrics allow disentanglement learning
methods to be compared on a fair ground. We also empirically uncovered new
interesting properties of VAE-based methods and interpreted them with our
formulation. These findings are promising and hopefully will encourage the
design of more theoretically driven models for learning disentangled
representations.
|
[{'version': 'v1', 'created': 'Mon, 26 Aug 2019 23:55:11 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Feb 2020 21:08:15 GMT'}
{'version': 'v3', 'created': 'Thu, 18 Mar 2021 22:59:04 GMT'}]
|
2021-03-22
|
[array(['Do', 'Kien', ''], dtype=object)
array(['Tran', 'Truyen', ''], dtype=object)]
|
17,349 |
2102.09974
|
Luisa Fernanda Roa Ballen
|
Luisa Roa, Andr\'es Rodr\'iguez-Rey, Alejandro Correa-Bahnsen, Carlos
Valencia
|
Supporting Financial Inclusion with Graph Machine Learning and Super-App
Alternative Data
|
Accepted to be appeared in IntelliSys2021
| null | null | null |
cs.LG cs.CY q-fin.GN
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The presence of Super-Apps have changed the way we think about the
interactions between users and commerce. It then comes as no surprise that it
is also redefining the way banking is done. The paper investigates how
different interactions between users within a Super-App provide a new source of
information to predict borrower behavior. To this end, two experiments with
different graph-based methodologies are proposed, the first uses graph based
features as input in a classification model and the second uses graph neural
networks. Our results show that variables of centrality, behavior of
neighboring users and transactionality of a user constituted new forms of
knowledge that enhance statistical and financial performance of credit risk
models. Furthermore, opportunities are identified for Super-Apps to redefine
the definition of credit risk by contemplating all the environment that their
platforms entail, leading to a more inclusive financial system.
|
[{'version': 'v1', 'created': 'Fri, 19 Feb 2021 15:13:06 GMT'}]
|
2021-02-22
|
[array(['Roa', 'Luisa', ''], dtype=object)
array(['Rodríguez-Rey', 'Andrés', ''], dtype=object)
array(['Correa-Bahnsen', 'Alejandro', ''], dtype=object)
array(['Valencia', 'Carlos', ''], dtype=object)]
|
17,350 |
1204.5174
|
Pablo Rossi
|
Maximiliano Barchiesi, Mercedes Sangroni, Carlos Renaudo, Pablo Rossi,
Mar\'ia de Carmen Pramparo, Valeria Nepote, Nelson Ruben Grosso, Mar\'ia
Fernanda Gayol
|
Christhin: Quantitative Analysis of Thin Layer Chromatography
| null | null | null | null |
cs.CE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Manual for Christhin 0.1.36 Christhin (Chromatography Riser Thin) is software
developed for the quantitative analysis of data obtained from thin-layer
chromatographic techniques (TLC). Once installed on your computer, the program
is very easy to use, and provides data quickly and accurately. This manual
describes the program, and reading should be enough to use it properly.
|
[{'version': 'v1', 'created': 'Mon, 23 Apr 2012 17:15:17 GMT'}
{'version': 'v2', 'created': 'Fri, 4 May 2012 16:11:28 GMT'}]
|
2012-05-07
|
[array(['Barchiesi', 'Maximiliano', ''], dtype=object)
array(['Sangroni', 'Mercedes', ''], dtype=object)
array(['Renaudo', 'Carlos', ''], dtype=object)
array(['Rossi', 'Pablo', ''], dtype=object)
array(['Pramparo', 'María de Carmen', ''], dtype=object)
array(['Nepote', 'Valeria', ''], dtype=object)
array(['Grosso', 'Nelson Ruben', ''], dtype=object)
array(['Gayol', 'María Fernanda', ''], dtype=object)]
|
17,351 |
2008.10570
|
Morteza Ziyadi
|
Morteza Ziyadi, Yuting Sun, Abhishek Goswami, Jade Huang, and Weizhu
Chen
|
Example-Based Named Entity Recognition
|
15 pages, 6 figures, 5 tables with appendix
| null | null | null |
cs.CL cs.IR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a novel approach to named entity recognition (NER) in the presence
of scarce data that we call example-based NER. Our train-free few-shot learning
approach takes inspiration from question-answering to identify entity spans in
a new and unseen domain. In comparison with the current state-of-the-art, the
proposed method performs significantly better, especially when using a low
number of support examples.
|
[{'version': 'v1', 'created': 'Mon, 24 Aug 2020 17:18:24 GMT'}]
|
2020-08-25
|
[array(['Ziyadi', 'Morteza', ''], dtype=object)
array(['Sun', 'Yuting', ''], dtype=object)
array(['Goswami', 'Abhishek', ''], dtype=object)
array(['Huang', 'Jade', ''], dtype=object)
array(['Chen', 'Weizhu', ''], dtype=object)]
|
17,352 |
2003.05131
|
Wen Chen
|
Haibin Wan, Wen Chen, Jianbo Ji
|
Efficient Linear Transmission Strategy for MIMO Relaying Broadcast
Channels with Direct Links
| null | null | null | null |
eess.SP cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this letter, a novel linear transmission strategy to design the linear
precoding matrix~(PM) at base station~(BS) and the beamforming matrix~(BM) at
relay station~(RS) for multiple-input multiple-output~(MIMO) relaying broadcast
channels with direct channel (DC) is proposed, in which a linear PM is designed
at BS based on DC, and the RS utilizes the PM, the backward channel and the
forward channel to design the linear BM. We then give a quite tight lower bound
of the achievable sum-rate of the network with the proposed strategy to measure
the performance. The sum-rates achieved by the proposed strategy is compared
with other schemes without considering the DC in design in simulations, which
shows that the proposed strategy outperforms the existing methods when RS is
close to BS.
|
[{'version': 'v1', 'created': 'Wed, 11 Mar 2020 06:22:27 GMT'}]
|
2020-04-02
|
[array(['Wan', 'Haibin', ''], dtype=object)
array(['Chen', 'Wen', ''], dtype=object)
array(['Ji', 'Jianbo', ''], dtype=object)]
|
17,353 |
1405.6865
|
Stephane Gerbi
|
Ka\"is Ammari (FSM), St\'ephane Gerbi (LAMA)
|
Interior feedback stabilization of wave equations with dynamic boundary
delay
| null | null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider an interior stabilization problem for the wave
equation with dynamic boundary delay.We prove some stability results under the
choice of damping operator. The proof of the main result is based on a
frequency domain method and combines a contradiction argument with the
multiplier technique to carry out a special analysis for the resolvent.
|
[{'version': 'v1', 'created': 'Tue, 27 May 2014 10:53:12 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Feb 2016 19:43:36 GMT'}]
|
2016-02-10
|
[array(['Ammari', 'Kaïs', '', 'FSM'], dtype=object)
array(['Gerbi', 'Stéphane', '', 'LAMA'], dtype=object)]
|
17,354 |
math-ph/0610045
|
Boris Khoruzhenko
|
Yan V Fyodorov and Boris A Khoruzhenko
|
A few remarks on Colour-Flavour Transformations,truncations of random
unitary matrices, Berezin reproducing kernels and Selberg type integrals
|
one statement about Berezin reproducing kernels is corrected
|
J.Phys.A40:669-700,2007
|
10.1088/1751-8113/40/4/007
| null |
math-ph math.MP
| null |
We investigate diverse relations of the colour-flavour transformations (CFT)
introduced by Zirnbauer in \cite{Z1,Z2} to various topics in random matrix
theory and multivariate analysis, such as measures on truncations of unitary
random matrices, Jacobi ensembles of random matrices, Berezin reproducing
kernels and a generalization of the Selberg integral due to Kaneko, Kadell and
Yan involving the Schur functions. Apart from suggesting explicit formulas for
bosonic CFT for the unitary group in the range of parameters beyond that in
\cite{Z2}, we also suggest an alternative variant of the transformation, with
integration going over an unbounded domain of a pair of Hermitian matrices. The
latter makes possible evaluation of certain averages in random matrix theory.
|
[{'version': 'v1', 'created': 'Thu, 19 Oct 2006 17:56:35 GMT'}
{'version': 'v2', 'created': 'Sun, 5 Nov 2006 20:47:28 GMT'}]
|
2010-11-29
|
[array(['Fyodorov', 'Yan V', ''], dtype=object)
array(['Khoruzhenko', 'Boris A', ''], dtype=object)]
|
17,355 |
1810.03413
|
Marta Lewicka
|
Marta Lewicka
|
Random Tug of War games for the ${\mathbf p}$-Laplacian:
${\mathbf{1<p<{\boldsymbol \infty}}}$
|
25 pages, 2 figures
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a new finite difference approximation to the Dirichlet problem for
the homogeneous $\mathbf{p}$-Laplace equation posed on an $N$-dimensional
domain, in connection with the Tug of War games with noise. Our game and the
related mean-value expansion that we develop, superposes the ``deterministic
averages'' ``$\frac{1}{2}(\inf +\sup)$'' taken over balls, with the
``stochastic averages'' ``$\fint$'', taken over $N$-dimensional ellipsoids
whose aspect ratio depends on $N,\mathbf{p}$ and whose orientations span all
directions while determining $\inf / \sup$. We show that the unique solutions
$u_\epsilon$ of the related dynamic programming principle are automatically
continuous for continuous boundary data, and coincide with the well-defined
game values. Our game has thus the min-max property: the order of supremizing
the outcomes over strategies of one player and infimizing over strategies of
their opponent, is immaterial. We further show that domains satisfying the
exterior corkscrew condition are game regular in this context, i.e. the family
$\{u_\epsilon\}_{\epsilon\to 0}$ converges uniformly to the unique viscosity
solution of the Dirichlet problem.
|
[{'version': 'v1', 'created': 'Mon, 8 Oct 2018 12:51:18 GMT'}
{'version': 'v2', 'created': 'Sun, 27 Oct 2019 20:49:03 GMT'}]
|
2019-10-29
|
[array(['Lewicka', 'Marta', ''], dtype=object)]
|
17,356 |
1701.03951
|
Noemie Combe
|
N.C.Combe
|
Connected components of real $CB_{n}$ algebraic varieties
| null |
Math Semesterberichte (2018), pp1-15
|
10.1007/s00591-018-0221-z
| null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Connected components of real algebraic varieties invariant under the
$CB_{n}$-Coxeter group are investigated. In particular, we consider their
maximal number and their geometric and topological properties. This provides a
decomposition for the space of $CB_{n}$-algebraic varieties. We construct
$CB_{n}$-polynomials using Young-posets and partitions of integers. Our results
establish bounds on the number of connected components for a given set of
coefficients. It turns out that this number can achieve an upper bound of
$2^{n}+1$ for specific coefficients. We introduce a new method to characterize
the geometry of these real algebraic varieties, using J. Cerf and A. Douady
theory for varieties with angular boundary and the theory of chambers and
galleries. We provide several examples that bring out the essence of these
results.
|
[{'version': 'v1', 'created': 'Sat, 14 Jan 2017 17:22:08 GMT'}]
|
2018-08-29
|
[array(['Combe', 'N. C.', ''], dtype=object)]
|
17,357 |
physics/0306053
|
Ahmad
|
Ahmad Moshaii, Rasool Sadighi-Bonabi, Mohammad Taeibi-Rahni
|
Compressibility Consideration in the Boundary of a Strongly Collapsing
Bubble
|
8 pages, 17 figures
| null | null | null |
physics.flu-dyn
| null |
Equations of radial motion of a gas bubble in a compressible viscous liquid
have been modified to account for compressibility at the bubble boundary. A new
bubble boundary equation has been derived, including a new term resulted from
liquid compressibility. The influence of this term has been numerically
investigated using isothermal-adiabatic model for the gas inside the bubble.
The results clearly indicate that, at the end of the collapse, the new term has
a very significant role and its consideration dramatically changes the bubble
characteristics. Moreover, the more intense the collapse is, the more
significant the effect of the new term is. Also, it has been reasoned out that,
the influence of the new term will be established even when the effects of mass
(water vapor) exchange, chemical reactions, and gas dynamics inside the bubble
are taken into account.
|
[{'version': 'v1', 'created': 'Fri, 6 Jun 2003 15:28:16 GMT'}
{'version': 'v2', 'created': 'Sun, 8 Jun 2003 06:47:51 GMT'}
{'version': 'v3', 'created': 'Sun, 24 Aug 2003 20:41:01 GMT'}]
|
2007-05-23
|
[array(['Moshaii', 'Ahmad', ''], dtype=object)
array(['Sadighi-Bonabi', 'Rasool', ''], dtype=object)
array(['Taeibi-Rahni', 'Mohammad', ''], dtype=object)]
|
17,358 |
1202.3424
|
Bruce T. Draine
|
Bruce T. Draine (Princeton Univ.) and Piotr J. Flatau (UCSD)
|
User Guide for the Discrete Dipole Approximation Code DDSCAT 7.2
|
95 pages. Expanded and updated to conform to latest release, DDSCAT
7.2.1. Complete software package available at
http://code.google.com/p/ddscat/
| null | null | null |
physics.comp-ph astro-ph.GA cond-mat.mes-hall physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
DDSCAT 7.2 is a freely available open-source Fortran-90 software package
applying the discrete dipole approximation (DDA) to calculate scattering and
absorption of electromagnetic waves by targets with arbitrary geometries and
complex refractive index. The targets may be isolated entities (e.g., dust
particles), but may also be 1-d or 2-d periodic arrays of "target unit cells",
which can be used to study absorption, scattering, and electric fields around
arrays of nanostructures.
The DDA approximates the target by an array of polarizable points. The theory
of the DDA and its implementation in DDSCAT is presented in Draine (1988) and
Draine & Flatau (1994), and its extension to periodic structures in Draine &
Flatau (2008). Efficient near-field calculations are enabled following Flatau &
Draine (2012). DDSCAT 7.2 allows accurate calculations of electromagnetic
scattering from targets with size parameters 2*pi*aeff/lambda < 25 provided the
refractive index m is not large compared to unity (|m-1| < 2). DDSCAT 7.2
includes support for MPI, OpenMP, and the Intel Math Kernel Library (MKL).
DDSCAT 7.2 supports calculations for a variety of target geometries (e.g.,
ellipsoids, regular tetrahedra, rectangular solids, finite cylinders, hexagonal
prisms, etc.). Target materials may be both inhomogeneous and anisotropic. It
is straightforward for the user to import new target geometries into the code.
DDSCAT 7.2 calculates total cross sections for absorption and scattering and
selected elements of the Mueller scattering intensity matrix for specified
orientation of the target relative to the incident wave, and for specified
scattering directions. DDSCAT 7.2 calculates E throughout a user-specified
rectangular volume containing the target. A Fortran-90 code READNF to read E
and P from files created by DDSCAT 7.2 is included in the distribution.
|
[{'version': 'v1', 'created': 'Wed, 15 Feb 2012 20:27:02 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Feb 2012 01:53:24 GMT'}
{'version': 'v3', 'created': 'Tue, 15 May 2012 13:34:12 GMT'}]
|
2012-05-16
|
[array(['Draine', 'Bruce T.', '', 'Princeton Univ.'], dtype=object)
array(['Flatau', 'Piotr J.', '', 'UCSD'], dtype=object)]
|
17,359 |
1702.00068
|
Michele Bolognesi
|
Michele Bolognesi, Alex Massarenti
|
Birational geometry of moduli spaces of configurations of points on the
line
|
22 pages (fixed one small inaccuracy)
|
Alg. Number Th. 15 (2021) 513-544
|
10.2140/ant.2021.15.515
| null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we study the geometry of GIT configurations of $n$ ordered
points on $\mathbb{P}^1$ both from the the birational and the biregular
viewpoint. In particular, we prove that any extremal ray of the Mori cone of
effective curves of the quotient $(\mathbb{P}^1)^n//PGL(2)$, taken with the
symmetric polarization, is generated by a one dimensional boundary stratum of
the moduli space. Furthermore, we develop some technical machinery that we use
to compute the canonical divisor and the Hilbert polynomial of
$(\mathbb{P}^1)^n//PGL(2)$ in its natural embedding, and its group of
automorphisms.
|
[{'version': 'v1', 'created': 'Tue, 31 Jan 2017 22:06:45 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Oct 2017 18:27:05 GMT'}
{'version': 'v3', 'created': 'Fri, 11 Jun 2021 14:03:02 GMT'}]
|
2021-06-14
|
[array(['Bolognesi', 'Michele', ''], dtype=object)
array(['Massarenti', 'Alex', ''], dtype=object)]
|
17,360 |
math/0003127
|
Susan G. Williams
|
Daniel S. Silver (University of South Alabama), Susan G. Williams
(University of South Alabama)
|
Mahler measure, links and homology growth
|
13 pages, figures. Small corrections, references updated. To appear
in Topology
| null | null | null |
math.GT math.DS
| null |
Let l be a link of d components. For every finite-index lattice in Z^d there
is an associated finite abelian cover of S^3 branched over l. We show that the
order of the torsion subgroup of the first homology of these covers has
exponential growth rate equal to the logarithmic Mahler measure of the
Alexander polynomial of l, provided this polynomial is nonzero. Our proof uses
a theorem of Lind, Schmidt and Ward on the growth rate of connected components
of periodic points for algebraic Z^d-actions.
|
[{'version': 'v1', 'created': 'Tue, 21 Mar 2000 22:39:59 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Mar 2000 21:45:13 GMT'}
{'version': 'v3', 'created': 'Fri, 25 May 2001 17:21:32 GMT'}]
|
2007-05-23
|
[array(['Silver', 'Daniel S.', '', 'University of South Alabama'],
dtype=object)
array(['Williams', 'Susan G.', '', 'University of South Alabama'],
dtype=object) ]
|
17,361 |
1701.07712
|
Alessia Annibale
|
Alessia Annibale, Louise A Dziobek-Garrett, Haider Tari
|
The role of T-helper/T-suppressor ratio in the adaptive immune response:
a dynamical model
|
22 pages, 11 figures
| null |
10.1088/1751-8121/aaed5e
| null |
q-bio.CB cond-mat.dis-nn cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent experimental studies have suggested the ratio between T-helper and
T-suppressor lymphocytes as an index of immunosuppression in HIV, cancer,
immunosenescence and inflammatory and auto-immune diseases. However, a
quantitative understanding of the impact of this ratio on the immune response
has lagged behind data and its validity as a tool for prognostic monitoring or
therapeutic target remains an open question. In this work, we use statistical
physics and dynamical systems approaches to analyze the time-dependent response
to an antigen, of a simplified model of the adaptive immune system, which
comprises B, T-helper and T-suppressor lymphocytes. The model is remarkably
robust against changes in the noise level and kinetic parameters, but it is
very sensitive to changes in the ratio between T-helper and T-suppressor
lymphocytes, exhibiting, in particular, a transition from a responsive to an
immuno-suppressed phase, as the ratio is lowered below a critical value, which
is in line with experiments. This result supports the validity of the
T-helper/T-suppressor ratio as an index of immunosuppression and may provide a
useful theoretical benchmark to interpret and compare experiments.
|
[{'version': 'v1', 'created': 'Thu, 26 Jan 2017 14:17:30 GMT'}
{'version': 'v2', 'created': 'Thu, 1 Nov 2018 14:57:30 GMT'}]
|
2018-12-05
|
[array(['Annibale', 'Alessia', ''], dtype=object)
array(['Dziobek-Garrett', 'Louise A', ''], dtype=object)
array(['Tari', 'Haider', ''], dtype=object)]
|
17,362 |
2210.04509
|
Sema Kazan
|
Sema Kazan and Cumali Y{\i}ld{\i}r{\i}m
|
Screen Almost Semi-Invariant Lightlike Submanifolds of Indefinite
Kaehler Manifolds
|
13 pages
| null | null | null |
math.DG
|
http://creativecommons.org/licenses/by/4.0/
|
In the present paper, we introduce screen almost semi-invariant (SASI)
lightlike submanifolds of indefinite Keahler manifolds. We obtain the neccesary
and sufficient condition for the induced connection to be a metric connection
on SASI-lightlike submanifolds and construct an example for this manifold. Also
we find some conditions for integrability of distributions and investigate
certain characterizations.
|
[{'version': 'v1', 'created': 'Mon, 10 Oct 2022 09:20:28 GMT'}]
|
2022-10-11
|
[array(['Kazan', 'Sema', ''], dtype=object)
array(['Yıldırım', 'Cumali', ''], dtype=object)]
|
17,363 |
2111.11593
|
Earl Sullivan Lester Mr
|
Earl Lester and Krzysztof Bolejko
|
Imprints of decaying dark matter on cosmic voids
|
13 pages, 8 figures. Corresponds to version published 17 December
2021 in Phys. Rev. D 104, 123540
|
Physical Review D 104.12 (2021): 123540
|
10.1103/PhysRevD.104.123540
| null |
astro-ph.CO
|
http://creativecommons.org/licenses/by/4.0/
|
The Standard Cosmological Model assumes that more than 85\% of matter is in
the form of collisionless and pressureless dark matter. Unstable decaying dark
matter has been proposed in the literature as an extension to the standard cold
dark matter model. In this paper we investigate a scenario when dark matter
decays and the resultant particle moves with respect to the dark matter. A
covariant hydrodynamical model is developed in which the decay is modeled by
the transfer of energy-momentum between two dark dust fluid components. We
parameterise the model in terms of the decay rate $\Gamma$ and injection
velocity $v_i$ of the resultant dark matter particles. We apply the framework
to study the evolution of cosmic voids which are environments with low content
of baryonic matter. Thus, unlike baryon-rich environments, voids provide an
opportunity to measure dark matter signals that are less contaminated by
complex baryonic processes. We find that the growth of S-type voids is modified
by the dark matter decay, leading to imprints at the present day. This paper
serves as a proof-of-concept that cosmic voids can be used to study dark mater
physics. We argue that future cosmological observations of voids should focus
on signs of reported features to either confirm or rule out the decaying dark
matter scenario. Lack of presence of reported features could put constraints of
the decay of dark matter in terms of $\Gamma > H_0^{-1}$ and $v_i<10$ km/s.
|
[{'version': 'v1', 'created': 'Tue, 23 Nov 2021 00:43:21 GMT'}
{'version': 'v2', 'created': 'Fri, 14 Jan 2022 02:49:51 GMT'}]
|
2022-01-17
|
[array(['Lester', 'Earl', ''], dtype=object)
array(['Bolejko', 'Krzysztof', ''], dtype=object)]
|
17,364 |
1202.6091
|
Liangzhong Ruan
|
Liangzhong Ruan and Vincent K. N. Lau
|
Interference Alignment for Partially Connected MIMO Cellular Networks
|
Submitted to IEEE Transactions on Signal Processing, accepted
| null |
10.1109/TSP.2012.2192432
| null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we propose an iterative interference alignment (IA) algorithm
for MIMO cellular networks with partial connectivity, which is induced by
heterogeneous path losses and spatial correlation. Such systems impose several
key technical challenges in the IA algorithm design, namely the overlapping
between the direct and interfering links due to the MIMO cellular topology as
well as how to exploit the partial connectivity. We shall address these
challenges and propose a three stage IA algorithm. As illustration, we analyze
the achievable degree of freedom (DoF) of the proposed algorithm for a
symmetric partially connected MIMO cellular network. We show that there is
significant DoF gain compared with conventional IA algorithms due to partial
connectivity. The derived DoF bound is also backward compatible with that
achieved on fully connected K-pair MIMO interference channels.
|
[{'version': 'v1', 'created': 'Mon, 27 Feb 2012 23:40:46 GMT'}
{'version': 'v2', 'created': 'Fri, 2 Mar 2012 16:10:54 GMT'}
{'version': 'v3', 'created': 'Mon, 19 Mar 2012 13:50:40 GMT'}
{'version': 'v4', 'created': 'Wed, 21 Mar 2012 15:36:44 GMT'}]
|
2013-08-01
|
[array(['Ruan', 'Liangzhong', ''], dtype=object)
array(['Lau', 'Vincent K. N.', ''], dtype=object)]
|
17,365 |
0812.1324
|
Charles Rezk
|
Charles Rezk
|
A streamlined proof of Goodwillie's n-excisive approximation
|
Expanded introduction
|
Algebr. Geom. Topol. 13 (2013) 1049-1051
|
10.2140/agt.2013.13.1049
| null |
math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a shorter proof of Lemma 1.9 from Goodwillie, "Calculus III", which
is the key step in proving that the construction P_nF gives an n-excisive
functor.
|
[{'version': 'v1', 'created': 'Sun, 7 Dec 2008 00:44:38 GMT'}
{'version': 'v2', 'created': 'Thu, 7 Mar 2013 22:27:25 GMT'}]
|
2014-10-01
|
[array(['Rezk', 'Charles', ''], dtype=object)]
|
17,366 |
1308.5364
|
Hoda Farahani
|
J. Sadeghi, M. Khurshudyan, M. Hakobyan and H. Farahani
|
Phenomenological Fluids from Interacting Tachyonic Scalar Fields
|
12 pages
|
Int. J. Theor. Phys. 53 (2014) 2246
|
10.1007/s10773-014-2025-9
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we are interested to consider mathematical ways to obtain
different phenomenological fluids from two-component Tachyonic scalar fields.
We consider interaction between components and investigate problem numerically.
Statefinder diagnostics and validity of the generalized second law of
thermodynamics performed and checked. We suppose that our Universe bounded by
Hubble horizon.
|
[{'version': 'v1', 'created': 'Sat, 24 Aug 2013 22:13:54 GMT'}]
|
2014-07-10
|
[array(['Sadeghi', 'J.', ''], dtype=object)
array(['Khurshudyan', 'M.', ''], dtype=object)
array(['Hakobyan', 'M.', ''], dtype=object)
array(['Farahani', 'H.', ''], dtype=object)]
|
17,367 |
2303.11930
|
Aida Abiad
|
Aida Abiad, Leonardo de Lima, Dheer Noal Desai, Krystal Guo, Leslie
Hogben, Jose Madrid
|
Positive and Negative Square Energies of Graphs
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The energy of a graph $G$ is the sum of the absolute values of the
eigenvalues of the adjacency matrix of $G$. Let $s^+(G), s^-(G)$ denote the sum
of the squares of the positive and negative eigenvalues of $G$, respectively.
It was conjectured by [Elphick, Farber, Goldberg, Wocjan, Discrete Math.
(2016)] that if $G$ is a connected graph of order $n$, then $s^+(G)\geq n-1$
and $s^-(G) \geq n-1$. In this paper, we show partial results towards this
conjecture. In particular, numerous structural results that may help in proving
the conjecture are derived, including the effect of various graph operations.
These are then used to establish the conjecture for several graph classes,
including graphs with certain fraction of positive eigenvalues and unicyclic
graphs.
|
[{'version': 'v1', 'created': 'Tue, 21 Mar 2023 15:31:44 GMT'}]
|
2023-03-22
|
[array(['Abiad', 'Aida', ''], dtype=object)
array(['de Lima', 'Leonardo', ''], dtype=object)
array(['Desai', 'Dheer Noal', ''], dtype=object)
array(['Guo', 'Krystal', ''], dtype=object)
array(['Hogben', 'Leslie', ''], dtype=object)
array(['Madrid', 'Jose', ''], dtype=object)]
|
17,368 |
astro-ph/0311418
|
Poonam Chandra
|
P. Chandra (1 and 2), A. Ray (1), S. Bhatnagar (3) ((1) Tata Institute
of Fundamental Research, (2) JAP, Indian Institute of Science, (3) National
Radio Astronomy Observatory, Socorro)
|
Low frequency observations of SN 1993J with Giant Meterwave Radio
Telescope
|
5 pages, 12 figures. Uses svmult.cls. To appear in proceedings of IAU
Colloquium 192 "Supernovae (10 years of SN 1993J)", April 2003, Valencia,
Spain, eds. J. M. Marcaide and K. W. Weiler
| null | null | null |
astro-ph
| null |
In this paper, we discuss the low frequency spectrum of SN 1993J with GMRT.
We observed SN 1993J at several epochs in 20cm, 50cm, 90cm and 125cm
wavelengths and achieved near simultaneous spectra. We fit synchrotron self
absorption (SSA) and free-free models to the data. We compare the size of SN
obtained using SSA fits to that of size extrapolated from VLBI measurements at
various epochs using public data at earlier epochs. We find that the
synchrotron self absorption process is insufficient to reproduce the observed
size of the supernova under the assumption of equipartition between magnetic
fields and relativistic electrons. We also derive the evolution of spectral
index and magnetic field at several epochs.
|
[{'version': 'v1', 'created': 'Tue, 18 Nov 2003 07:26:35 GMT'}]
|
2007-05-23
|
[array(['Chandra', 'P.', '', '1 and 2'], dtype=object)
array(['Ray', 'A.', ''], dtype=object)
array(['Bhatnagar', 'S.', ''], dtype=object)]
|
17,369 |
2108.09244
|
Rui A. C. Ferreira
|
Rui A. C. Ferreira and Thomas Simon
|
Convolution of beta prime distribution
|
Minor corrections. To appear in Transactions of the American
Mathematical Society
| null | null | null |
math.CA math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We establish some identities in law for the convolution of a beta prime
distribution with itself, involving the square root of beta distributions. The
proof of these identities relies on transformations on generalized
hypergeometric series obtained via Appell series of the first kind and Thomae's
relationships for ${}_3F_2(1)$. Using a self-decomposability argument, the
identities are applied to derive complete monotonicity properties for quotients
of confluent hypergeometric functions having a doubling character. By means of
probability, we also obtain a simple proof of Tur\'an's inequality for the
parabolic cylinder function and the confluent hypergeometric function of the
second kind. The case of Mill's ratio is discussed in detail.
|
[{'version': 'v1', 'created': 'Fri, 20 Aug 2021 16:12:41 GMT'}
{'version': 'v2', 'created': 'Thu, 19 May 2022 08:37:34 GMT'}]
|
2022-05-20
|
[array(['Ferreira', 'Rui A. C.', ''], dtype=object)
array(['Simon', 'Thomas', ''], dtype=object)]
|
17,370 |
1302.6956
|
Jong-Ping Hsu
|
Jong-Ping Hsu
|
Experimental Tests on Yang-Mills Gravity with Accurate Measurements of
the Deflection of Light
|
7 pages. To be published in The European Physical Journal - Plus
(2013)
|
Eur. Phys. J. Plus (2013) 128: 31
|
10.1140/epjp/i2013-133031-3
| null |
gr-qc hep-th physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the geometric-optics limit, Yang-Mills gravity with space-time
translational gauge symmetry predicts $\D \phi =7Gm/(2R) \approx 1.53''$ for
the deflection of a light ray by the sun. The result, which is about 12%
smaller than that in the conventional theory, is consistent with experiments
involving optical frequencies that had an accuracy of 10-20%.
|
[{'version': 'v1', 'created': 'Wed, 27 Feb 2013 18:50:59 GMT'}]
|
2014-02-26
|
[array(['Hsu', 'Jong-Ping', ''], dtype=object)]
|
17,371 |
1503.04333
|
Kieran Greer Dr
|
Kieran Greer
|
A More Human Way to Play Computer Chess
| null | null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper suggests a forward-pruning technique for computer chess that uses
'Move Tables', which are like Transposition Tables, but for moves not
positions. They use an efficient memory structure and has put the design into
the context of long and short-term memories. The long-term memory updates a
play path with weight reinforcement, while the short-term memory can be
immediately added or removed. With this, 'long branches' can play a short path,
before returning to a full search at the resulting leaf nodes. Re-using an
earlier search path allows the tree to be forward-pruned, which is known to be
dangerous, because it removes part of the search process. Additional checks are
therefore made and moves can even be re-added when the search result is
unsatisfactory. Automatic feature analysis is now central to the algorithm,
where key squares and related squares can be generated automatically and used
to guide the search process. Using this analysis, if a search result is
inferior, it can re-insert un-played moves that cover these key squares only.
On the tactical side, a type of move that the forward-pruning will fail on is
recognised and a pattern-based solution to that problem is suggested. This has
completed the theory of an earlier paper and resulted in a more human-like
approach to searching for a chess move. Tests demonstrate that the obvious
blunders associated with forward pruning are no longer present and that it can
compete at the top level with regard to playing strength.
|
[{'version': 'v1', 'created': 'Sat, 14 Mar 2015 18:47:07 GMT'}
{'version': 'v2', 'created': 'Sun, 28 Jun 2015 14:23:20 GMT'}
{'version': 'v3', 'created': 'Tue, 16 May 2017 12:11:10 GMT'}
{'version': 'v4', 'created': 'Mon, 11 Jun 2018 08:37:36 GMT'}
{'version': 'v5', 'created': 'Thu, 17 Jan 2019 12:31:20 GMT'}]
|
2019-01-18
|
[array(['Greer', 'Kieran', ''], dtype=object)]
|
17,372 |
hep-ph/0608124
|
Bernd Kniehl
|
B. A. Kniehl
|
Inclusive hadron electroproduction at HERA at NLO with and without
transverse-momentum constraint
|
5 pages, 7 figures, to appear in the Proceedings of the XIV
International Workshop on Deep Inelastic Scattering (DIS 2006), 20-24 April
2006, Tsukuba City, Japan; Fig. 2 corrected
| null |
10.1142/9789812706706_0102
| null |
hep-ph
| null |
We study single-hadron inclusive electroproduction in ep scattering at DESY
HERA at next-to-leading order in the parton model of quantum chromodynamics
endowed with non-perturbative fragmentation functions. Specifically, we
consider charged-hadron production, with unspecified transverse momentum p_T,
in the Breit frame and D^{*+-} production as a function of p_T, and perform
comparisons with recent data from the H1 Collaboration.
|
[{'version': 'v1', 'created': 'Thu, 10 Aug 2006 20:49:31 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Sep 2006 13:36:38 GMT'}]
|
2017-08-23
|
[array(['Kniehl', 'B. A.', ''], dtype=object)]
|
17,373 |
1207.0780
|
Thirumala Rao B
|
B. Thirumala Rao, L. S. S. Reddy
|
Survey on Improved Scheduling in Hadoop MapReduce in Cloud Environments
|
5 Pages, 2 figures; International Journal of Computer Applications,
November 2011
| null | null | null |
cs.DC
|
http://creativecommons.org/licenses/by/3.0/
|
Cloud Computing is emerging as a new computational paradigm shift.
Hadoop-MapReduce has become a powerful Computation Model for processing large
data on distributed commodity hardware clusters such as Clouds. In all Hadoop
implementations, the default FIFO scheduler is available where jobs are
scheduled in FIFO order with support for other priority based schedulers also.
In this paper we study various scheduler improvements possible with Hadoop and
also provided some guidelines on how to improve the scheduling in Hadoop in
Cloud Environments.
|
[{'version': 'v1', 'created': 'Tue, 3 Jul 2012 19:01:26 GMT'}]
|
2012-07-04
|
[array(['Rao', 'B. Thirumala', ''], dtype=object)
array(['Reddy', 'L. S. S.', ''], dtype=object)]
|
17,374 |
hep-ph/0510370
|
Jun-Chen Su
|
Jun-Chen Su and Jian-Xing Chen
|
Retardation Terms in The One-Gluon Exchange Potential
| null |
Int.J.Mod.Phys. A16 (2001) 3745-3753
|
10.1142/S0217751X01005134
| null |
hep-ph
| null |
It is pointed out that the retardation terms given in the original
Fermi-Breit potential vanish in the center of mass frame. The retarded
one-gluon exchange potential is rederived in this paper from the
three-dimensional one-gluon exchange kernel which appears in the exact
three-dimensional relativistic equation for quark-antiquark bound states. The
retardation part of the potential given in the approximation of order $p^2/m^2$
is shown to be different from those derived in the previous literature. This
part is off-shell and does no longer vanish in the center of mass frame.
|
[{'version': 'v1', 'created': 'Fri, 28 Oct 2005 06:25:39 GMT'}]
|
2009-11-11
|
[array(['Su', 'Jun-Chen', ''], dtype=object)
array(['Chen', 'Jian-Xing', ''], dtype=object)]
|
17,375 |
2107.12078
|
Sergei Grudinin
|
Dmitrii Zhemchuzhnikov (DAO), Ilia Igashov (DAO), Sergei Grudinin
(DAO)
|
6DCNN with roto-translational convolution filters for volumetric data
processing
| null | null | null | null |
q-bio.QM cs.LG eess.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we introduce 6D Convolutional Neural Network (6DCNN) designed
to tackle the problem of detecting relative positions and orientations of local
patterns when processing three-dimensional volumetric data. 6DCNN also includes
SE(3)-equivariant message-passing and nonlinear activation operations
constructed in the Fourier space. Working in the Fourier space allows
significantly reducing the computational complexity of our operations. We
demonstrate the properties of the 6D convolution and its efficiency in the
recognition of spatial patterns. We also assess the 6DCNN model on several
datasets from the recent CASP protein structure prediction challenges. Here,
6DCNN improves over the baseline architecture and also outperforms the state of
the art.
|
[{'version': 'v1', 'created': 'Mon, 26 Jul 2021 09:56:55 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Jul 2021 08:04:05 GMT'}]
|
2021-08-02
|
[array(['Zhemchuzhnikov', 'Dmitrii', '', 'DAO'], dtype=object)
array(['Igashov', 'Ilia', '', 'DAO'], dtype=object)
array(['Grudinin', 'Sergei', '', 'DAO'], dtype=object)]
|
17,376 |
1801.08394
|
Samuel Beaulieu
|
Samuel Beaulieu, Antoine Comby, Dominique Descamps, St\'ephane Petit,
Fran\c{c}ois L\'egar\'e, Baptiste Fabre, Val\'erie Blanchet, Yann Mairesse
|
Multiphoton Photoelectron Circular Dichroism of Limonene with
Independent Polarization State Control of the Bound-Bound and Bound-Continuum
Transitions
| null | null |
10.1063/1.5042533
| null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Photoionization of randomly oriented chiral molecules with circularly
polarized light leads to a strong forward/backward asymmetry in the
photoelectron angular distribution. This chiroptical effect, referred to as
Photoelectron Circular Dichroism (PECD), was shown to take place in all
ionization regimes, from single photon to tunnel ionization. In the Resonance
Enhanced Multiphoton Ionisation (REMPI) regime, where most of the table-top
PECD experiments have been performed, understanding the role of the
intermediate resonances is currently the subject of experimental and
theoretical investigations. In an attempt to decouple the role of bound-bound
and bound-continuum transitions in REMPI-PECD, we photoionized the (+)-limonene
enantiomer using two-color laser fields in [1+1'] and [2+2'] ionization
schemes, where the polarization state of each color can be controlled
independently. We demonstrate that the main effect of the bound-bound
transition is to break the sample isotropy by orientation-dependent
photoexcitation, in agreement with recent theoretical pre- dictions. We show
that the angular distribution of PECD strongly depends on the anisotropy of
photoexcitation to the intermediate state, which is different for circularly
and linearly polarized laser pulses. On the contrary, the helicity of the pulse
that drives the bound-bound transition is shown to have a negligible effect on
the PECD.
|
[{'version': 'v1', 'created': 'Thu, 25 Jan 2018 13:30:29 GMT'}
{'version': 'v2', 'created': 'Fri, 31 Aug 2018 11:17:41 GMT'}]
|
2018-10-17
|
[array(['Beaulieu', 'Samuel', ''], dtype=object)
array(['Comby', 'Antoine', ''], dtype=object)
array(['Descamps', 'Dominique', ''], dtype=object)
array(['Petit', 'Stéphane', ''], dtype=object)
array(['Légaré', 'François', ''], dtype=object)
array(['Fabre', 'Baptiste', ''], dtype=object)
array(['Blanchet', 'Valérie', ''], dtype=object)
array(['Mairesse', 'Yann', ''], dtype=object)]
|
17,377 |
hep-th/9801074
|
Haisong Yang
|
Haisong Yang (UC Santa Barbara)
|
Black Holes with Multiple Charges and the Correspondence Principle
|
26 pages, harvmac, minor corrections
|
Phys.Rev. D58 (1998) 044008
|
10.1103/PhysRevD.58.044008
|
UCSBTH-98-01
|
hep-th gr-qc
| null |
We consider the entropy of near extremal black holes with multiple charges in
the context of the recently proposed correspondence principle of Horowitz and
Polchinski, including black holes with two, three and four Ramond-Ramond
charges. We find that at the matching point the black hole entropy can be
accounted for by massless open strings ending on the D-branes for all cases
except a black hole with four Ramond-Ramond charges, in which case a possible
resolution in terms of brane-antibrane excitations is considered.
|
[{'version': 'v1', 'created': 'Tue, 13 Jan 1998 03:49:29 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Feb 1998 05:02:17 GMT'}
{'version': 'v3', 'created': 'Fri, 6 Mar 1998 21:59:33 GMT'}]
|
2009-10-31
|
[array(['Yang', 'Haisong', '', 'UC Santa Barbara'], dtype=object)]
|
17,378 |
1304.2281
|
Mrigank Sharad
|
Mrigank Sharad, Deliang Fan, and Kaushik Roy
|
Ultra Low Power Associative Computing with Spin Neurons and Resistive
Crossbar Memory
| null |
In Proceedings of the 50th Annual Design Automation Conference (p.
107). ACM., 2012
|
10.1145/2463209.2488866
| null |
cond-mat.mtrl-sci cs.ET
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Emerging resistive-crossbar memory (RCM) technology can be promising for
computationally-expensive analog pattern-matching tasks. However, the use of
CMOS analog-circuits with RCM would result in large power-consumption and poor
scalability, thereby eschewing the benefits of RCM-based computation. We
propose the use of low-voltage, fast-switching, magneto-metallic spin-neurons
for ultra low-power non-Boolean computing with RCM. We present the design of
analog associative memory for face recognition using RCM, where, substituting
conventional analog circuits with spin-neurons can achieve ~100x lower power.
This makes the proposed design ~1000x more energy-efficient than a 45nm-CMOS
digital ASIC, thereby significantly enhancing the prospects of RCM based
computational hardware.
|
[{'version': 'v1', 'created': 'Mon, 8 Apr 2013 17:49:28 GMT'}]
|
2013-08-26
|
[array(['Sharad', 'Mrigank', ''], dtype=object)
array(['Fan', 'Deliang', ''], dtype=object)
array(['Roy', 'Kaushik', ''], dtype=object)]
|
17,379 |
2303.13559
|
Xianchao Wu
|
Xianchao Wu
|
Enhancing Unsupervised Speech Recognition with Diffusion GANs
|
5 pages, 1 figure, accepted by ICASSP 2023
| null | null | null |
cs.CL cs.LG cs.SD eess.AS
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We enhance the vanilla adversarial training method for unsupervised Automatic
Speech Recognition (ASR) by a diffusion-GAN. Our model (1) injects instance
noises of various intensities to the generator's output and unlabeled reference
text which are sampled from pretrained phoneme language models with a length
constraint, (2) asks diffusion timestep-dependent discriminators to separate
them, and (3) back-propagates the gradients to update the generator.
Word/phoneme error rate comparisons with wav2vec-U under Librispeech (3.1% for
test-clean and 5.6% for test-other), TIMIT and MLS datasets, show that our
enhancement strategies work effectively.
|
[{'version': 'v1', 'created': 'Thu, 23 Mar 2023 02:54:00 GMT'}]
|
2023-03-27
|
[array(['Wu', 'Xianchao', ''], dtype=object)]
|
17,380 |
2304.09837
|
David Holmes
|
David Holmes
|
Points of non-linearity of functions generated by random neural networks
|
1 figure; comments very welcome
| null | null | null |
cs.LG math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider functions from the real numbers to the real numbers, output by a
neural network with 1 hidden activation layer, arbitrary width, and ReLU
activation function. We assume that the parameters of the neural network are
chosen uniformly at random with respect to various probability distributions,
and compute the expected distribution of the points of non-linearity. We use
these results to explain why the network may be biased towards outputting
functions with simpler geometry, and why certain functions with low
information-theoretic complexity are nonetheless hard for a neural network to
approximate.
|
[{'version': 'v1', 'created': 'Wed, 19 Apr 2023 17:40:19 GMT'}]
|
2023-04-20
|
[array(['Holmes', 'David', ''], dtype=object)]
|
17,381 |
2001.09812
|
Qiang Wang
|
Qiang Wang, Haoran Xue, Baile Zhang, and Y. D. Chong
|
Observation of Protected Photonic Edge States Induced By Real-Space
Topological Lattice Defects
| null |
Phys. Rev. Lett. 124, 243602 (2020)
|
10.1103/PhysRevLett.124.243602
| null |
cond-mat.mes-hall physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Topological defects (TDs) in crystal lattices are elementary lattice
imperfections that cannot be removed by local perturbations, due to their real
space topology. We show that adding TDs into a valley photonic crystal
generates a lattice disclination that acts like a domain wall and hosts
topological edge states. The disclination functions as a freeform waveguide
connecting a pair of TDs of opposite topological charge. This interplay between
the real-space topology of lattice defects and band topology provides a novel
scheme to implement large-scale photonic structures with complex arrangements
of robust topological waveguides and resonators.
|
[{'version': 'v1', 'created': 'Thu, 23 Jan 2020 10:23:14 GMT'}]
|
2020-07-01
|
[array(['Wang', 'Qiang', ''], dtype=object)
array(['Xue', 'Haoran', ''], dtype=object)
array(['Zhang', 'Baile', ''], dtype=object)
array(['Chong', 'Y. D.', ''], dtype=object)]
|
17,382 |
1305.5064
| null |
F. Militello, P. Tamain, W. Fundamenski, A. Kirk, V.Naulin, A.H.
Nielsen and the MAST team
|
Experimental and numerical characterisation of the turbulence in the
Scrape-Off Layer of MAST
|
23 pages, 16 figures. This is an author-created, un-copyedited
version of an article accepted for publication in Plasma Physics and
Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or
omissions in this version of the manuscript or any version derived from it
|
Plasma Physics and Controlled Fusion, Vol.55, No.2. February 2013,
pp. 025005
|
10.1088/0741-3335/55/2/025005
| null |
physics.plasm-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Numerical simulations of interchange turbulence in the Scrape-Off Layer are
performed in a regime relevant for a specific L-mode MAST (Mega Ampere
Spherical Tokamak) discharge. Such a discharge was diagnosed with a
reciprocating arm equipped with a Gundestrup probe. A detailed comparison of
the average and statistical properties of the simulated and experimental ion
saturation current is performed. Good agreement is found in the time averaged
radial profile, in the probability distribution functions (PDFs) and in
qualitative features of the signals such as the shape, duration and separation
of burst events. These results confirm the validity of the simple interchange
model used and help to identify where it can be improved. Finally, the
simulated data are used to assess the importance of the temperature
fluctuations on plasma potential and radial velocity measurements acquired with
Langmuir probes. It is shown that the correlation between the actual plasma
quantities and the signal of the synthetic diagnostics is poor, suggesting that
accurate measurements of the temperature fluctuations are needed in order to
obtain reliable estimates of the perpendicular fluxes.
|
[{'version': 'v1', 'created': 'Wed, 22 May 2013 09:39:42 GMT'}]
|
2014-08-13
|
[array(['Militello', 'F.', ''], dtype=object)
array(['Tamain', 'P.', ''], dtype=object)
array(['Fundamenski', 'W.', ''], dtype=object)
array(['Kirk', 'A.', ''], dtype=object)
array(['Naulin', 'V.', ''], dtype=object)
array(['Nielsen', 'A. H.', ''], dtype=object)
array(['team', 'the MAST', ''], dtype=object)]
|
17,383 |
2109.05717
|
Yilong Zhang
|
Yilong Zhang
|
Topological Abel-Jacobi Map and Mixed Hodge Structures
|
21 pages, to appear in Math. Res. Lett
| null | null | null |
math.AG math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For a smooth projective variety X of dimension 2n-1 over complex field, Zhao
defined the topological Abel-Jacobi map, which sends vanishing cycles on a
smooth hyperplane section Y to the middle dimensional primitive intermediate
Jacobian of X. It agrees with Griffiths' Abel-Jacobi map on vanishing cycles
that are algebraic and varies holomorphically on the locus of Hodge classes as
hyperplane section deforms. On the other hand, Schnell proposed an alternative
construction using the real-splitting property of the mixed Hodge structure on
H^{2n-1}(X\Y). We show that the two definitions coincide, which answers a
question of Schnell.
|
[{'version': 'v1', 'created': 'Mon, 13 Sep 2021 05:54:29 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Aug 2022 03:15:09 GMT'}
{'version': 'v3', 'created': 'Thu, 30 Mar 2023 02:31:25 GMT'}]
|
2023-03-31
|
[array(['Zhang', 'Yilong', ''], dtype=object)]
|
17,384 |
1903.12245
|
Andrei Afanasev
|
Andrei V. Afanasev, D.V. Karlovets, and V.G. Serbo
|
The Schwinger Scattering of Twisted Neutrons by Nuclei
|
5 pages, 4 figures; revised version includes an additional figure
|
Phys. Rev. C 100, 051601 (2019)
|
10.1103/PhysRevC.100.051601
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Thanks to J.~Schwinger, the process of elastic scattering of neutrons by
nuclei is known to depend on the interference between a nuclear amplitude and
an electromagnetic one for small scattering angles, resulting in spin
asymmetries of a cross section or in polarization of the scattered neutrons.
While this interference depends on the neutron's {\it transverse} polarization
and on {\it an imaginary part} of the nuclear amplitude, this conclusion holds
only for the incident plane-wave neutrons with a definite momentum. Here we
show that this scattering is altered when the twisted neutrons, recently
obtained experimentally, are used instead -- that is, neutrons with an orbital
angular momentum. For bulk targets, the angular distributions of the scattered
neutrons get modified, while scattering of a superposition of states with the
different angular momenta also reveals dependence on the longitudinal
polarization. For well-localized targets, the observables develop a dependence
on the neutron's {\it helicity} and on {\it a real part} of the nuclear
amplitude, providing full access to its phase already in the Born
approximation. We argue that the corresponding spin asymmetries are measurable
at existing neutron facilities. Thus, scattering of the twisted neutrons by
nuclei can provide means for quantum tomography of the neutron states and
become a useful tool for hadronic studies, low-energy nuclear physics, tests of
fundamental symmetries, and neutron optics.
|
[{'version': 'v1', 'created': 'Thu, 28 Mar 2019 20:19:40 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Sep 2019 20:54:08 GMT'}]
|
2019-12-04
|
[array(['Afanasev', 'Andrei V.', ''], dtype=object)
array(['Karlovets', 'D. V.', ''], dtype=object)
array(['Serbo', 'V. G.', ''], dtype=object)]
|
17,385 |
1002.1128
|
Shankaranarayanan S
|
S. Shankaranarayanan
|
Dark spinor driven inflation
|
3 Pages, To appear in the Proceedings of the 12th Marcel Grossman
Meeting
| null | null | null |
astro-ph.CO gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inflation is considered to be the best paradigm for describing the early
universe. However, it is still unclear what is the nature of the field which
drives inflation. In this talk, we discuss the possibility of spinor field
driving inflation. Spinflaton -- a scalar condensate of the dark spinor field
-- has a single scalar degree of freedom and leads to the identical
acceleration equation as the scalar field. We also discuss the advantages of
this model compared to the scalar field driven inflation and discuss its
observational relevance.
|
[{'version': 'v1', 'created': 'Fri, 5 Feb 2010 05:41:12 GMT'}]
|
2010-03-05
|
[array(['Shankaranarayanan', 'S.', ''], dtype=object)]
|
17,386 |
2106.13871
|
Guillermo Valle-P\'erez
|
Guillermo Valle-P\'erez, Gustav Eje Henter, Jonas Beskow, Andr\'e
Holzapfel, Pierre-Yves Oudeyer, Simon Alexanderson
|
Transflower: probabilistic autoregressive dance generation with
multimodal attention
|
Article presented at SIGGRAPH Asia 2021, and published in ACM
Transactions on Graphics
| null |
10.1145/3478513.3480570
| null |
cs.SD cs.GR cs.LG eess.AS
|
http://creativecommons.org/licenses/by/4.0/
|
Dance requires skillful composition of complex movements that follow
rhythmic, tonal and timbral features of music. Formally, generating dance
conditioned on a piece of music can be expressed as a problem of modelling a
high-dimensional continuous motion signal, conditioned on an audio signal. In
this work we make two contributions to tackle this problem. First, we present a
novel probabilistic autoregressive architecture that models the distribution
over future poses with a normalizing flow conditioned on previous poses as well
as music context, using a multimodal transformer encoder. Second, we introduce
the currently largest 3D dance-motion dataset, obtained with a variety of
motion-capture technologies, and including both professional and casual
dancers. Using this dataset, we compare our new model against two baselines,
via objective metrics and a user study, and show that both the ability to model
a probability distribution, as well as being able to attend over a large motion
and music context are necessary to produce interesting, diverse, and realistic
dance that matches the music.
|
[{'version': 'v1', 'created': 'Fri, 25 Jun 2021 20:14:28 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Oct 2021 15:16:37 GMT'}
{'version': 'v3', 'created': 'Sat, 11 Jun 2022 22:48:55 GMT'}]
|
2022-06-14
|
[array(['Valle-Pérez', 'Guillermo', ''], dtype=object)
array(['Henter', 'Gustav Eje', ''], dtype=object)
array(['Beskow', 'Jonas', ''], dtype=object)
array(['Holzapfel', 'André', ''], dtype=object)
array(['Oudeyer', 'Pierre-Yves', ''], dtype=object)
array(['Alexanderson', 'Simon', ''], dtype=object)]
|
17,387 |
0802.1292
|
Fakhar ul Inam
|
Y. Pan, F. Inam, M. Zhang and D. A. Drabold
|
Atomistic Origin of Urbach Tails in Amorphous Silicon
|
4 pages, 4 figures, submitted to Phys. Rev. Lett
| null |
10.1103/PhysRevLett.100.206403
| null |
cond-mat.dis-nn cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Exponential band edges have been observed in a variety of materials, both
crystalline and amorphous. In this paper, we infer the structural origins of
these tails in amorphous and defective crystalline Si by direct calculation
with current {\it ab initio} methods. We find that exponential tails appear in
relaxed models of diamond with suitable point defects. In amorphous silicon
(a-Si), we find that structural filaments of short bonds and long bonds exist
in the network, and that the tail states near the extreme edges of both band
tails are are also filamentary, with much localization on the structural
filaments. We connect the existence of both filament systems to structural
relaxation in the presence of defects and or topological disorder.
|
[{'version': 'v1', 'created': 'Sun, 10 Feb 2008 00:21:03 GMT'}]
|
2009-11-13
|
[array(['Pan', 'Y.', ''], dtype=object)
array(['Inam', 'F.', ''], dtype=object)
array(['Zhang', 'M.', ''], dtype=object)
array(['Drabold', 'D. A.', ''], dtype=object)]
|
17,388 |
1907.04273
|
Sergio P\'erez-Roca
|
Sergio P\'erez-Roca, Julien Marzat, Emilien Flayac, Helene
Piet-Lahanier, Nicolas Langlois, Francois Farago, Marco Galeotta, Serge Le
Gonidec
|
An MPC Approach to Transient Control of Liquid-Propellant Rocket Engines
|
IFAC ACA 2019, Cranfield, UK. 6 pages
| null | null | null |
eess.SY cs.SY physics.space-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The current context of launchers reusability requires the improvement of
control algorithms for their liquid-propellant rocket engines. Their transient
phases are generally still performed in open loop. In this paper, it is aimed
at enhancing the control performance and robustness during the fully continuous
phase of the start-up transient of a generic gas-generator cycle. The main
control goals concern end-state tracking in terms of combustion-chamber
pressure and chambers mixture ratios, as well as the verification of a set of
hard operational constraints. A controller based on a nonlinear preprocessor
and on linear MPC (Model-Predictive Control) has been synthesised, making use
of nonlinear state-space models of the engine. The former generates the
full-state reference to be tracked while the latter achieves the aforementioned
goals with sufficient accuracy and verifying constraints for the required
pressure levels. Robustness considerations are included in the MPC algorithm
via an epigraph formulation of the minimax robust optimisation problem, where a
finite set of perturbation scenarios is considered.
|
[{'version': 'v1', 'created': 'Tue, 9 Jul 2019 16:19:45 GMT'}
{'version': 'v2', 'created': 'Wed, 27 Nov 2019 16:42:50 GMT'}]
|
2019-11-28
|
[array(['Pérez-Roca', 'Sergio', ''], dtype=object)
array(['Marzat', 'Julien', ''], dtype=object)
array(['Flayac', 'Emilien', ''], dtype=object)
array(['Piet-Lahanier', 'Helene', ''], dtype=object)
array(['Langlois', 'Nicolas', ''], dtype=object)
array(['Farago', 'Francois', ''], dtype=object)
array(['Galeotta', 'Marco', ''], dtype=object)
array(['Gonidec', 'Serge Le', ''], dtype=object)]
|
17,389 |
2208.02155
|
Andreas Rydh
|
A. Khansili, R. Sharma, R. Hissariya, I. Baev, J. Schwarz, F.
Kielgast, M. Nissen, M. Martins, M.-J. Huang, M. Hoesch, V. K. Paidi, J. van
Lierop, A. Rydh and S. K. Mishra
|
Element-specific probe of quantum criticality in $\mathrm{CeCoIn_{5}}$
|
5 pages, 5 figures. Supplementary information (4 pages, 5 figures)
| null | null | null |
cond-mat.str-el cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Employing the elemental sensitivity of x-ray absorption spectroscopy (XAS)
and x-ray magnetic circular dichroism (XMCD), we study the valence and magnetic
order in the heavy fermion superconductor CeCoIn$_5$. We probe spin population
of the f-electrons in Ce and d-electrons in Co as a function of temperature
(down to 0.1 K) and magnetic field (up to 6 T). From the XAS we find a
pronounced contribution of Ce$^{4+}$ component at low temperature and a clear
temperature dependence of the Ce valence below 5 K, suggesting enhanced valence
fluctuations, an indication for the presence of a nearby quantum critical point
(QCP). We observe no significant corresponding change with magnetic field. The
XMCD displays a weak signal for Ce becoming clear only at 6 T. This splitting
of the Kramers doublet ground state of Ce$^{3+}$ is significantly smaller than
expected for independent but screened ions, indicating strong antiferromagnetic
pair interactions. The unconventional character of superconductivity in
CeCoIn$_5$ is evident in the extremely large specific heat step at the
superconducting transition.
|
[{'version': 'v1', 'created': 'Wed, 3 Aug 2022 15:43:22 GMT'}]
|
2022-08-04
|
[array(['Khansili', 'A.', ''], dtype=object)
array(['Sharma', 'R.', ''], dtype=object)
array(['Hissariya', 'R.', ''], dtype=object)
array(['Baev', 'I.', ''], dtype=object)
array(['Schwarz', 'J.', ''], dtype=object)
array(['Kielgast', 'F.', ''], dtype=object)
array(['Nissen', 'M.', ''], dtype=object)
array(['Martins', 'M.', ''], dtype=object)
array(['Huang', 'M. -J.', ''], dtype=object)
array(['Hoesch', 'M.', ''], dtype=object)
array(['Paidi', 'V. K.', ''], dtype=object)
array(['van Lierop', 'J.', ''], dtype=object)
array(['Rydh', 'A.', ''], dtype=object)
array(['Mishra', 'S. K.', ''], dtype=object)]
|
17,390 |
1603.03755
|
Tameem Albash
|
Tameem Albash, Walter Vinci, and Daniel A. Lidar
|
Simulated Quantum Annealing with Two All-to-All Connectivity Schemes
|
17 pages, 19 figures. v2: updated to published version
|
Phys. Rev. A 94, 022327 (2016)
|
10.1103/PhysRevA.94.022327
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantum annealing aims to exploit quantum mechanics to speed up the search
for the solution to optimization problems. Most problems exhibit complete
connectivity between the logical spin variables after they are mapped to the
Ising spin Hamiltonian of quantum annealing. To account for hardware
constraints of current and future physical quantum annealers, methods enabling
the embedding of fully connected graphs of logical spins into a constant-degree
graph of physical spins are therefore essential. Here, we compare the recently
proposed embedding scheme for quantum annealing with all-to-all connectivity
due to Lechner, Hauke and Zoller (LHZ) [Science Advances 1 (2015)] to the
commonly used minor embedding (ME) scheme. Using both simulated quantum
annealing and parallel tempering simulations, we find that for a set of
instances randomly chosen from a class of fully connected, random Ising
problems, the ME scheme outperforms the LHZ scheme when using identical
simulation parameters, despite the fault tolerance of the latter to weakly
correlated spin-flip noise. This result persists even after we introduce
several decoding strategies for the LHZ scheme, including a minimum-weight
decoding algorithm that results in substantially improved performance over the
original LHZ scheme. We explain the better performance of the ME scheme in
terms of more efficient spin updates, which allows it to better tolerate the
correlated spin-flip errors that arise in our model of quantum annealing. Our
results leave open the question of whether the performance of the two embedding
schemes can be improved using scheme-specific parameters and new error
correction approaches.
|
[{'version': 'v1', 'created': 'Fri, 11 Mar 2016 20:42:31 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Aug 2016 04:43:17 GMT'}]
|
2016-08-24
|
[array(['Albash', 'Tameem', ''], dtype=object)
array(['Vinci', 'Walter', ''], dtype=object)
array(['Lidar', 'Daniel A.', ''], dtype=object)]
|
17,391 |
1204.3490
|
Takahiro Nishimichi
|
Takahiro Nishimichi (Kavli IPMU)
|
Scale Dependence of the Halo Bias in General Local-Type Non-Gaussian
Models I: Analytical Predictions and Consistency Relations
|
25 pages, 3 figures, typo corrected, Appendix C updated, submitted to
JCAP
| null |
10.1088/1475-7516/2012/08/037
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the clustering of halos in cosmological models starting with
general local-type non-Gaussian primordial fluctuations. We employ multiple
Gaussian fields and add local-type non-Gaussian corrections at arbitrary order
to cover a class of models described by frequently-discussed f_nl, g_nl and
\tau_nl parameterization. We derive a general formula for the halo power
spectrum based on the peak-background split formalism. The resultant spectrum
is characterized by only two parameters responsible for the scale-dependent
bias at large scale arising from the primordial non-Gaussianities in addition
to the Gaussian bias factor. We introduce a new inequality for testing
non-Gaussianities originating from multi fields, which is directly accessible
from the observed power spectrum. We show that this inequality is a
generalization of the Suyama-Yamaguchi inequality between f_nl and \tau_nl to
the primordial non-Gaussianities at arbitrary order. We also show that the
amplitude of the scale-dependent bias is useful to distinguish the simplest
quadratic non-Gaussianities (i.e., f_nl-type) from higher-order ones (g_nl and
higher), if one measures it from multiple species of galaxies or clusters of
galaxies. We discuss the validity and limitations of our analytic results by
comparison with numerical simulations in an accompanying paper.
|
[{'version': 'v1', 'created': 'Mon, 16 Apr 2012 14:01:49 GMT'}
{'version': 'v2', 'created': 'Fri, 11 May 2012 03:01:51 GMT'}]
|
2015-06-04
|
[array(['Nishimichi', 'Takahiro', '', 'Kavli IPMU'], dtype=object)]
|
17,392 |
1109.0534
|
Hechang Lei
|
Hechang Lei and C. Petrovic
|
Giant increase in critical current density of KxFe2-ySe2 single crystals
|
3 figures, 4 pages
|
Phys. Rev. B 84, 212502 (2011)
|
10.1103/PhysRevB.84.212502
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By using post-annealing and quenching technique, we show that the critical
current density Jc,ab of KxFe2-ySe2 single crystals can be enhanced more than
one order of magnitude up to ~ 2.1 \times 10^4 A/cm^2 at 1.8 K. The scaling law
between normalized pinning force and reduced field for all measured
temperatures was observed, reflecting the presence of only one dominant pinning
mechanism. Analysis indicates presence of 3D point-like normal core pinning
sources in quenched KxFe2-ySe2 samples whereas dominant vortex interaction with
pinning centers is via spatial variations in Tc ("deltaTc pinning").
|
[{'version': 'v1', 'created': 'Fri, 2 Sep 2011 19:59:20 GMT'}
{'version': 'v2', 'created': 'Fri, 16 Mar 2012 14:54:51 GMT'}]
|
2012-03-19
|
[array(['Lei', 'Hechang', ''], dtype=object)
array(['Petrovic', 'C.', ''], dtype=object)]
|
17,393 |
0805.1395
|
Reinhard Laubenbacher
|
Paola Vera-Licona and Reinhard Laubenbacher
|
Inference of ecological interaction networks
|
To appear in Annales Zoologici Fennici
| null | null | null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The inference of the interactions between organisms in an ecosystem from
observational data is an important problem in ecology. This paper presents a
mathematical inference method, originally developed for the inference of
biochemical networks in molecular biology, adapted for the inference of
networks of ecological interactions. The method is applied to a network of
invertebrate families (taxa) in a rice field.
|
[{'version': 'v1', 'created': 'Fri, 9 May 2008 18:41:21 GMT'}]
|
2008-05-12
|
[array(['Vera-Licona', 'Paola', ''], dtype=object)
array(['Laubenbacher', 'Reinhard', ''], dtype=object)]
|
17,394 |
1410.3972
|
Eran Elhaik
|
Eran Elhaik, Tatiana V. Tatarinova, Anatole A. Klyosov, and Dan Graur
|
An extended reply to Mendez et al.: The 'extremely ancient' chromosome
that still isn't
| null | null | null | null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Earlier this year, we published a scathing critique of a paper by Mendez et
al. (2013) in which the claim was made that a Y chromosome was 237,000-581,000
years old. Elhaik et al. (2014) also attacked a popular article in Scientific
American by the senior author of Mendez et al. (2013), whose title was "Sex
with other human species might have been the secret of Homo sapiens's [sic]
success" (Hammer 2013). Five of the 11 authors of Mendez et al. (2013) have now
written a "rebuttal," and we were allowed to reply. Unfortunately, our reply
was censored for being "too sarcastic and inflamed." References were removed,
meanings were castrated, and a dedication in the Acknowledgments was deleted.
Now, that the so-called rebuttal by 45% of the authors of Mendez et al. (2013)
has been published together with our vasectomized reply, we decided to make
public our entire reply to the so called "rebuttal." In fact, we go one step
further, and publish a version of the reply that has not even been
self-censored.
|
[{'version': 'v1', 'created': 'Wed, 15 Oct 2014 08:45:15 GMT'}
{'version': 'v2', 'created': 'Mon, 20 Oct 2014 21:22:26 GMT'}]
|
2014-10-22
|
[array(['Elhaik', 'Eran', ''], dtype=object)
array(['Tatarinova', 'Tatiana V.', ''], dtype=object)
array(['Klyosov', 'Anatole A.', ''], dtype=object)
array(['Graur', 'Dan', ''], dtype=object)]
|
17,395 |
gr-qc/9712080
|
Carlos Augusto Romero
|
A.Barros and C.Romero
|
On the weak field approximation of Brans-Dicke theory of gravity
|
12 pages, latex, no figures
|
Phys.Lett. A245 (1998) 31-34
|
10.1016/S0375-9601(98)00382-X
| null |
gr-qc
| null |
It is shown that in the weak field approximation solutions of Brans-Dicke
equations are simply related to the solutions of General Relativity equations
for the same matter distribution. A simple method is developed which permits to
obtain Brans-Dicke solutions from Einstein solutions when both theories are
considered in their linearized forms. To illustrate the method some examples
found in the literature are discussed.
|
[{'version': 'v1', 'created': 'Thu, 18 Dec 1997 17:57:42 GMT'}]
|
2009-10-30
|
[array(['Barros', 'A.', ''], dtype=object)
array(['Romero', 'C.', ''], dtype=object)]
|
17,396 |
2303.09062
|
Manasi Patwardhan
|
Ankita Sontakke, Kanika Kalra, Manasi Patwardhan, Lovekesh Vig,
Raveendra Kumar Medicherla, Ravindra Naik, Shrishti Pradhan
|
Knowledge Transfer for Pseudo-code Generation from Low Resource
Programming Language
|
11 pages, 1 figure, 5 tables
| null | null | null |
cs.SE cs.AI cs.LG
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Generation of pseudo-code descriptions of legacy source code for software
maintenance is a manually intensive task. Recent encoder-decoder language
models have shown promise for automating pseudo-code generation for high
resource programming languages such as C++, but are heavily reliant on the
availability of a large code-pseudocode corpus. Soliciting such pseudocode
annotations for codes written in legacy programming languages (PL) is a time
consuming and costly affair requiring a thorough understanding of the source
PL. In this paper, we focus on transferring the knowledge acquired by the
code-to-pseudocode neural model trained on a high resource PL (C++) using
parallel code-pseudocode data. We aim to transfer this knowledge to a legacy PL
(C) with no PL-pseudocode parallel data for training. To achieve this, we
utilize an Iterative Back Translation (IBT) approach with a novel test-cases
based filtration strategy, to adapt the trained C++-to-pseudocode model to
C-to-pseudocode model. We observe an improvement of 23.27% in the success rate
of the generated C codes through back translation, over the successive IBT
iteration, illustrating the efficacy of our approach.
|
[{'version': 'v1', 'created': 'Thu, 16 Mar 2023 03:38:08 GMT'}]
|
2023-03-17
|
[array(['Sontakke', 'Ankita', ''], dtype=object)
array(['Kalra', 'Kanika', ''], dtype=object)
array(['Patwardhan', 'Manasi', ''], dtype=object)
array(['Vig', 'Lovekesh', ''], dtype=object)
array(['Medicherla', 'Raveendra Kumar', ''], dtype=object)
array(['Naik', 'Ravindra', ''], dtype=object)
array(['Pradhan', 'Shrishti', ''], dtype=object)]
|
17,397 |
quant-ph/0607112
|
Berry Groisman
|
Berry Groisman
|
Reliable entanglement transfer between pure quantum states
|
6 pages, 4 pictures; revised version; to appear in Phys. Rev. A
|
Phys. Rev. A 74, 042302 (2006)
|
10.1103/PhysRevA.74.042302
| null |
quant-ph
| null |
The problem of the reliable transfer of entanglement from one pure bipartite
quantum state to another using local operations is analyzed. It is shown that
in the case of qubits the amount that can be transferred is restricted to the
difference between the entanglement of the two states. In the presence of a
catalytic state the range of the transferrable amount broadens to a certain
degree.
|
[{'version': 'v1', 'created': 'Mon, 17 Jul 2006 17:09:20 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Oct 2006 11:38:35 GMT'}]
|
2007-05-23
|
[array(['Groisman', 'Berry', ''], dtype=object)]
|
17,398 |
1811.02672
|
Michele Santacatterina
|
Yi Su and Lequn Wang and Michele Santacatterina and Thorsten Joachims
|
CAB: Continuous Adaptive Blending Estimator for Policy Evaluation and
Learning
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The ability to perform offline A/B-testing and off-policy learning using
logged contextual bandit feedback is highly desirable in a broad range of
applications, including recommender systems, search engines, ad placement, and
personalized health care. Both offline A/B-testing and off-policy learning
require a counterfactual estimator that evaluates how some new policy would
have performed, if it had been used instead of the logging policy. In this
paper, we identify a family of counterfactual estimators which subsumes most
such estimators proposed to date. Our analysis of this family identifies a new
estimator - called Continuous Adaptive Blending (CAB) - which enjoys many
advantageous theoretical and practical properties. In particular, it can be
substantially less biased than clipped Inverse Propensity Score (IPS) weighting
and the Direct Method, and it can have less variance than Doubly Robust and IPS
estimators. In addition, it is sub-differentiable such that it can be used for
learning, unlike the SWITCH estimator. Experimental results show that CAB
provides excellent evaluation accuracy and outperforms other counterfactual
estimators in terms of learning performance.
|
[{'version': 'v1', 'created': 'Tue, 6 Nov 2018 21:47:00 GMT'}
{'version': 'v2', 'created': 'Mon, 19 Nov 2018 22:29:01 GMT'}
{'version': 'v3', 'created': 'Tue, 14 May 2019 01:17:17 GMT'}
{'version': 'v4', 'created': 'Wed, 28 Aug 2019 19:01:31 GMT'}]
|
2019-08-30
|
[array(['Su', 'Yi', ''], dtype=object)
array(['Wang', 'Lequn', ''], dtype=object)
array(['Santacatterina', 'Michele', ''], dtype=object)
array(['Joachims', 'Thorsten', ''], dtype=object)]
|
17,399 |
0809.0207
|
Daniel Errandonea
|
D. Errandonea, F.J. Manjon, N. Garro, P. Rodriguez-Hernandez, S.
Radescu, A. Mujica, A. Munoz, and C.Y. Tu
|
Combined Raman scattering and ab initio investigation of
pressure-induced structural phase transitions in the scintillator ZnWO4
|
38 pages, 6 figures, 5 tables
|
PHYSICAL REVIEW B 78, 054116 (2008)
|
10.1103/PhysRevB.78.054116
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Room-temperature Raman scattering was measured in ZnWO4 up to 45 GPa. We
report the pressure dependence of all the Raman-active phonons of the
low-pressure wolframite phase. As pressure increases new Raman peaks appear at
30.6 GPa due to the onset of a reversible structural phase transition to a
distorted monoclinic b-fergusonite-type phase. The low- and high-pressure
phases coexist from 30.6 GPa to 36.5 GPa. In addition to the Raman measurements
we also report ab initio total-energy and lattice-dynamics calculations for the
two phases. These calculations helped us to determine the crystalline structure
of the high-pressure phase and to assign the observed Raman modes in both the
wolframite and b-fergusonite phases. Based upon the ab initio calculations we
propose the occurrence of a second phase transition at 57.6 GPa from the
b-fergusonite phase to an orthorhombic Cmca phase. The pressure evolution of
the lattice parameters and the atomic positions of wolframite ZnWO4 are also
theoretically calculated and an equation of state reported.
|
[{'version': 'v1', 'created': 'Mon, 1 Sep 2008 11:10:08 GMT'}]
|
2008-09-02
|
[array(['Errandonea', 'D.', ''], dtype=object)
array(['Manjon', 'F. J.', ''], dtype=object)
array(['Garro', 'N.', ''], dtype=object)
array(['Rodriguez-Hernandez', 'P.', ''], dtype=object)
array(['Radescu', 'S.', ''], dtype=object)
array(['Mujica', 'A.', ''], dtype=object)
array(['Munoz', 'A.', ''], dtype=object)
array(['Tu', 'C. Y.', ''], dtype=object)]
|
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