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Juan de Mairena

Posts: 11
Registered: 3/15/09
[Snark] rr4
Posted: May 1, 2016 5:05 PM
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arXiv:1511.02728 (*cross-listing*)
Date: Mon, 9 Nov 2015 15:59:22 GMT (748kb,D)

Title: Multiconfigurational quantum propagation with trajectory-guided
generalized coherent states
Authors: Adriano Grigolo, Thiago F. Viscondi and Marcus A. M. de Aguiar
Categories: quant-ph physics.chem-ph physics.class-ph physics.comp-ph
Comments: 29 pages, 3 figures
\\
A generalized version of the coupled coherent states method for coherent
states of arbitrary Lie groups is developed. In contrast to the original
formulation, which is restricted to frozen-Gaussian basis sets, the extended
method is suitable for propagating quantum states of systems featuring
diversified physical properties, such as spin degrees of freedom or particle
indistinguishability. The approach is illustrated with systems of
interacting
bosons trapped in double- and triple-well potentials, most adequately
described
in terms of SU(2) and SU(3) bosonic coherent states, respectively.
\\ ( http://arxiv.org/abs/1511.02728 , 748kb)
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arXiv:1511.02770 (*cross-listing*)
Date: Thu, 5 Nov 2015 13:24:20 GMT (38kb)

Title: On supraconvergence phenomenon for second order centered finite
differences on non-uniform grids
Authors: Gayaz Khakimzyanov, Denys Dutykh (LAMA)
Categories: math.NA cs.NA math.CA physics.class-ph physics.comp-ph
Comments: 17 pages, 2 figures, 2 tables, 27 references. Other author's
papers
can be downloaded at http://www.denys-dutykh.com/
\\
In the present note we consider an example of a boundary value problem
for a
simple second order ordinary differential equation, which may exhibit a
boundary layer phenomenon. We show that usual central finite differences,
which
are second order accurate on a uniform grid, can be substantially upgraded
to
the fourth order by a suitable choice of the underlying non-uniform grid.
This
example is quite pedagogical and may give some ideas for more complex
problems.
\\ ( http://arxiv.org/abs/1511.02770 , 38kb)
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arXiv:1511.02771 (*cross-listing*)
Date: Thu, 5 Nov 2015 19:21:00 GMT (1886kb)

Title: Numerical solution of conservation laws on moving grids
Authors: Gayaz Khakimzyanov, Denys Dutykh (LAMA), Dimitrios Mitsotakis, Nina
Shokina
Categories: math.NA cs.NA physics.class-ph physics.comp-ph
Comments: 33 pages, 7 figures, 5 tables, 43 references. Other author's
papers
can be downloaded at http://www.denys-dutykh.com/
\\
In the present article we describe a few simple and efficient finite
volume
type schemes on moving grids in one spatial dimension. The underlying finite
volume scheme is conservative and it is accurate up to the second order in
space. The main novelty consists in the motion of the grid. This new dynamic
aspect can be used to resolve better the areas with high solution gradients
or
any other special features. No interpolation procedure is employed, thus an
unnecessary solution smearing is avoided. Thus, our method enjoys excellent
conservation properties. The resulting grid is completely redistributed
according the choice of the so-called monitor function. Several more or less
universal choices of the monitor function are provided. Finally, the
performance of the proposed algorithm is illustrated on several examples
stemming from the simple linear advection to the simulation of complex
shallow
water waves.
\\ ( http://arxiv.org/abs/1511.02771 , 1886kb)
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arXiv:1510.07195 (*cross-listing*)
Date: Sun, 25 Oct 2015 01:11:19 GMT (47kb,D)

Title: The Necessity of Quantizing Gravity
Authors: Jeremy Adelman
Categories: gr-qc physics.hist-ph
Comments: 13 pages, two figures
\\
The Eppley Hannah thought experiment is often cited as justification for
attempts by theorists to develop a complete, consistent theory of quantum
gravity. A modification of the earlier "Heisenberg microscope" argument for
the
necessity of quantized light, the Eppley-Hannah thought experiment purports
to
show that purely classical gravitational waves would either not conserve
energy
or else allow for violations of the uncertainty principle. However, several
subsequent papers have cast doubt as to the validity of the Eppley-Hannah
argument. In this paper, we attempt to resurrect the Eppley-Hannah thought
experiment by modifying the original argument in such a manner as to render
it
immune to the present criticisms levied against it.
\\ ( http://arxiv.org/abs/1510.07195 , 47kb)
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arXiv:1511.02252 (*cross-listing*)
Date: Fri, 6 Nov 2015 22:10:14 GMT (1714kb)

Title: The weirdest martensite: Smectic liquid crystal microstructure and
Weyl-Poincar\'e invariance
Authors: Danilo B. Liarte, Matthew Bierbaum, Ricardo A. Mosna, Randall D.
Kamien and James P. Sethna
Categories: cond-mat.soft cond-mat.mtrl-sci
Comments: 5 pages, 4 figures
\\
Smectic liquid crystals are remarkable, beautiful examples of materials
microstructure, with ordered patterns of geometrically perfect ellipses and
hyperbolas. The solution of the complex problem of filling three-dimensional
space with domains of focal conics under constraining boundary conditions
yields a set of strict rules, which are similar to the compatibility
conditions
in a martensitic crystal. Here we present the rules giving compatible
conditions for the concentric circle domains found at two-dimensional
smectic
interfaces with planar boundary conditions. Using configurations generated
by
numerical simulations, we develop a clustering algorithm to decompose the
planar boundaries into domains. The interfaces between different domains
agree
well with the smectic compatibility conditions. We also discuss
generalizations
of our approach to describe the full three-dimensional smectic domains,
where
the variant symmetry group is the Weyl-Poincar\'e group of Lorentz boosts,
translations, rotations, and dilatations.
\\ ( http://arxiv.org/abs/1511.02252 , 1714kb)
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arXiv:1511.02361 (*cross-listing*)
Date: Sat, 7 Nov 2015 14:49:42 GMT (1046kb)

Title: A van der Waals pn heterojunction with organic/inorganic
semiconductors
Authors: Daowei He, Yiming Pan, Haiyan Nan, Shuai Gu, Ziyi Yang, Bing Wu,
Xiaoguang Luo, Bingchen Xu, Yuhan Zhang, Yun Li, Zhenhua Ni, Baigeng Wang,
Jia Zhu, Yang Chai, Yi Shi, and Xinran Wang
Categories: cond-mat.mes-hall cond-mat.mtrl-sci
Comments: 16 pages, 4 figures
Journal-ref: Applied Physics Letters 107, 183103 (2015)
\\
van der Waals (vdW) heterojunctions formed by two-dimensional (2D)
materials
have attracted tremendous attention due to their excellent
electrical/optical
properties and device applications. However, current 2D heterojunctions are
largely limited to atomic crystals, and hybrid organic/inorganic structures
are
rarely explored. Here, we fabricate hybrid 2D heterostructures with p-type
dioctylbenzothienobenzothiophene (C8-BTBT) and n-type MoS2. We find that
few-layer C8-BTBT molecular crystals can be grown on monolayer MoS2 by vdW
epitaxy, with pristine interface and controllable thickness down to
monolayer.
The operation of the C8-BTBT/MoS2 vertical heterojunction devices is highly
tunable by bias and gate voltages between three different regimes:
interfacial
recombination, tunneling and blocking. The pn junction shows diode-like
behavior with rectifying ratio up to 105 at the room temperature. Our
devices
also exhibit photovoltaic responses with power conversion efficiency of
0.31%
and photoresponsivity of 22mA/W. With wide material combinations, such
hybrid
2D structures will offer possibilities for opto-electronic devices that are
not
possible from individual constituents.
\\ ( http://arxiv.org/abs/1511.02361 , 1046kb)
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arXiv:1511.02400 (*cross-listing*)
Date: Sat, 7 Nov 2015 20:47:08 GMT (1234kb)

Title: Anomalous magneto-elastic and charge doping effects in thallium-doped
BaFe2As2
Authors: A.S. Sefat, L. Li, H.B. Cao, M.A. McGuire, B. Sales, R. Custelcean,
D.S. Parker
Categories: cond-mat.supr-con cond-mat.mtrl-sci cond-mat.str-el
Comments: 10 pages; 4 figures
\\
Within the BaFe2As2 crystal lattice, we partially substitute thallium for
barium and report the effects of interlayer coupling in Ba1-xTlxFe2As2
crystals. We demonstrate the unusual effects of magneto-elastic coupling and
charge doping in this iron-arsenide material, whereby Neel temperature rises
with small x, and then falls with additional x. Specifically, we find that
Neel
and structural transitions in BaFe2As2 (TN =Ts= 133 K) increase for x=0.05
(TN
= 138 K, Ts = 140 K) from magnetization, heat capacity, resistivity, and
neutron diffraction measurements. Evidence from single crystal X-ray
diffraction and first principles calculations attributes the stronger
magnetism
in x=0.05 to magneto-elastic coupling related to the shorter intraplanar
Fe-Fe
bond distance. With further thallium substitution, the transition
temperatures
decrease for x = 0.09 (TN = Ts = 131 K), and this is due to charge doping.
We
illustrate that small changes related to 3d transition-metal state can have
profound effects on magnetism.
\\ ( http://arxiv.org/abs/1511.02400 , 1234kb)
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arXiv:1511.02464 (*cross-listing*)
Date: Sun, 8 Nov 2015 09:57:40 GMT (763kb)

Title: An Industrial THz Killer Application?
Authors: Dook van Mechelen
Categories: physics.optics cond-mat.mtrl-sci physics.soc-ph
Comments: supplementary information included
Journal-ref: Optics & Photonics News 26 (11), 16-18 (2015)
\\
Terahertz technology is mature enough for large-volume sensing
applications.
However, Dook van Mechelen says there are a few hurdles preventing its
industrial debut. THz spectroscopy has a number of advantages that point to
abundant industrial applications, in areas such quality control, security
and
biomedical imaging. Yet despite those advantages, the search for a THz
"killer
application"--a novel, innovative use with a business case strong enough to
bring the technology into the industrial mainstream--has remained fruitless,
and even the hope of finding such an application has begun to falter. Why
has a
killer app for THz radiation been so elusive? And how can the road to
industrial application of this versatile technology be cleared?
\\ ( http://arxiv.org/abs/1511.02464 , 763kb)
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arXiv:1511.02622 (*cross-listing*)
Date: Mon, 9 Nov 2015 10:23:10 GMT (1106kb)

Title: Hydrogen-substituted superconductors SmFeAsO1-xHx misidentified as
oxygen-deficient SmFeAsO1-x
Authors: Yoshinori Muraba, Soshi Iimura, Satoru Matsuishi, and Hideo Hosono
Categories: cond-mat.supr-con cond-mat.mtrl-sci
\\
We investigated the preferred electron dopants at the oxygen sites of
1111-type SmFeAsO by changing the atmospheres around the precursor with the
composition of Sm:Fe:As:O = 1:1:1:1-x in high-pressure synthesis. Under H2O
and
H2 atmospheres, hydrogens derived from H2O or H2 molecules were introduced
into
the oxygen sites as a hydride ion, and SmFeAsO1-xHx was obtained. However,
when
the H2O and H2 sources were removed from the synthetic process, nearly
stoichiometric SmFeAsO was obtained and the maximum amount of oxygen
vacancies
introduced remained x = 0.05(4). Density functional theory calculations
indicated that substitution of hydrogen in the form of H- is more stable
than
the formation of an oxygen vacancy at the oxygen site of SmFeAsO. These
results
strongly imply that oxygen-deficient SmFeAsO1-x reported previously is
SmFeAsO1-xHx with hydride ion incorporated unintentionally during
high-pressure
synthesis.
\\ ( http://arxiv.org/abs/1511.02622 , 1106kb)
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\\
arXiv:1511.02645 (*cross-listing*)
Date: Mon, 9 Nov 2015 11:46:21 GMT (3512kb,D)

Title: Observation of anisotropic interlayer Raman modes in few-layer ReS2
Authors: Philipp Nagler, Gerd Plechinger, Christian Sch\"uller, Tobias Korn
Categories: cond-mat.mes-hall cond-mat.mtrl-sci
\\
ReS$_2$ has recently emerged as a new member in the rapidly growing
family of
two-dimensional materials. Unlike MoS$_2$ or WSe$_2$, the optical and
electrical properties of ReS$_2$ are not isotropic due to the reduced
symmetry
of the crystal. Here, we present layer-dependent Raman measurements of
ReS$_2$
samples ranging from monolayers to ten layers in the ultralow frequency
regime.
We observe layer breathing and shear modes which allow for easy assignment
of
the number of layers. Polarization-dependent measurements give further
insight
into the crystal structure and reveal an energetic shift of the shear mode
which stems from the in-plane anisotropy of the shear modulus in this
material.
\\ ( http://arxiv.org/abs/1511.02645 , 3512kb)
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\\
arXiv:1511.02730 (*cross-listing*)
Date: Mon, 9 Nov 2015 16:01:28 GMT (1900kb,D)

Title: Multiple nodeless superconducting gaps in noncentrosymmetric
superconductor PbTaSe2 with topological bulk nodal lines
Authors: M. X. Wang, Y. Xu, L. P. He, J. Zhang, X. C. Hong, P. L. Cai, Z. B.
Wang, J. K. Dong, S. Y. Li
Categories: cond-mat.supr-con cond-mat.mtrl-sci cond-mat.str-el
Comments: 5 pages, 4 figures
\\
Low-temperature thermal conductivity measurements were performed on single
crystal of PbTaSe$_2$, a noncentrosymmetric superconductor with topological
bulk nodal lines in the electronic band structure. It is found that the
residual linear term $\kappa_0/T$ is negligible in zero magnetic field.
Furthermore, the field dependence of $\kappa_0/T$ exhibits a clear
"$S$"-shape
curve. These results suggest that PbTaSe$_2$ has multiple nodeless
superconducting gaps. Therefore, the spin-triplet state with gap nodes does
not
play an important role in this noncentrosymmetric superconductor with strong
spin-orbital coupling. The fully gapped superconducting state also meets the
requirement of a topological superconductor, if PbTaSe$_2$ is indeed the
case.
\\ ( http://arxiv.org/abs/1511.02730 , 1900kb)
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\\
arXiv:1511.02749 (*cross-listing*)
Date: Mon, 9 Nov 2015 16:33:01 GMT (704kb)

Title: Investigation of the magnetic structure and crystal field states of
pyrochlore antiferromagnet Nd2Zr2O7
Authors: J. Xu, V. K. Anand, A. K. Bera, M. Frontzek, D. L. Abernathy, N.
Casati, K. Siemensmeyer, and B. Lake
Categories: cond-mat.str-el cond-mat.mtrl-sci
Comments: 12 pages, 15 figures, 2 tables
\\
We present synchrotron x-ray diffraction, neutron powder diffraction and
time-of-flight inelastic neutron scattering measurements on the rare earth
pyrochlore oxide Nd2Zr2O7 to study the ordered state magnetic structure and
cystal field states. The structural characterization by high-resolution
synchrotron x-ray diffraction confirms that the pyrochlore structure has no
detectable O vacancies or Nd/Zr site mixing. The neutron diffraction reveals
long range all-in/all-out antiferromagnetic order below T_N ~ 0.4 K with
propagation vector k = (0 0 0) and an ordered moment of 1.26(2) \mu_B/Nd at
0.1
K. The ordered moment is much smaller than the estimated moment of 2.65
\mu_B/Nd for the local <111> Ising ground state of Nd3+ (J=9/2) suggesting
that
the ordering is partially suppressed by quantum fluctuations. The strong
Ising
anisotropy is further confirmed by the inelastic neutron scattering data
which
reveals a well-isolated dipolar-octupolar type Kramers doublet ground state.
The crystal field level scheme and ground state wavefunction have been
determined.
\\ ( http://arxiv.org/abs/1511.02749 , 704kb)
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\\
arXiv:1511.02783 (*cross-listing*)
Date: Mon, 9 Nov 2015 17:48:25 GMT (154kb,D)

Title: Origin of forbidden reflections in multiferroic Ba$_2$CoGe$_2$O$_7$
by
neutron diffraction: Symmetry lowering or Renninger effect?
Authors: Andrew Sazonov, Martin Meven, Georg Roth, Robert Georgii, Istv\'an
K\'ezsm\'arki, Vilmos Kocsis and Vladimir Hutanu
Categories: cond-mat.str-el cond-mat.mtrl-sci
Comments: 5 pages, 3 figures, 3 tables, submitted for publication
\\
For a symmetry consistent theoretical description of the multiferroic
phase
of Ba$_2$CoGe$_2$O$_7$ a precise knowledge of its crystal structure is a
prerequisite. In our previous synchrotron X-ray diffraction experiment on
multiferroic Ba$_2$CoGe$_2$O$_7$ at room temperature we found forbidden
reflections that favour the tetragonal-to-orthorhombic symmetry lowering of
the
titled compound. Here, we report the results of room-temperature
single-crystal
diffraction studies with both hot and cold neutrons to differentiate between
the real symmetry lowering and multiple diffraction (the Renninger effect).
A
comparison of the experimental multiple diffraction patterns with simulated
ones rules out the symmetry lowering. Thus, the structural model based on
the
tetragonal space group $P\bar{4}2_1m$ was selected to describe the
Ba$_2$CoGe$_2$O$_7$ symmetry at room temperature. The precise structural
parameters from neutron diffraction at 300K are presented and compared with
the
previous X-ray diffraction results.
\\ ( http://arxiv.org/abs/1511.02783 , 154kb)
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\\
arXiv:1511.02704 (*cross-listing*)
Date: Mon, 9 Nov 2015 14:49:39 GMT (11kb)

Title: Quantum Computing with Parafermions
Authors: Adrian Hutter and Daniel Loss
Categories: quant-ph cond-mat.mes-hall cond-mat.other
Comments: 8 pages, 1 figure
\\
$\mathbb{Z}_d$ Parafermions are exotic non-Abelian quasiparticles
generalizing Majorana fermions, which correspond to the case $d=2$. In
contrast
to Majorana fermions, braiding of parafermions with $d>2$ allows to perform
an
entangling gate. This has spurred interest in parafermions and a variety of
condensed matter systems have been proposed as potential hosts for them. In
this work, we study the computational power of braiding parafermions more
systematically. We make no assumptions on the underlying physical model but
derive all our results from the algebraical relations that define
parafermions.
We find a familiy of $2d$ representations of the braid group that are
compatible with these relations. The braiding operators derived this way
reproduce those derived previously from physical grounds as special cases.
We
show that if a $d$-level qudit is encoded in the fusion space of four
parafermions, braiding of these four parafermions allows to generate the
entire
single-qudit Clifford group (up to phases), for any $d$. If $d$ is odd,
then we
show that in fact the entire many-qudit Clifford group can be generated.
\\ ( http://arxiv.org/abs/1511.02704 , 11kb)
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\\
arXiv:1511.02429 (*cross-listing*)
Date: Sun, 8 Nov 2015 02:49:22 GMT (4211kb)

Title: A Micro-foundation of Social Capital in Evolving Social Networks
Authors: Ahmed M. Alaa, Kartik Ahuja, and Mihaela van der Schaar
Categories: cs.SI physics.soc-ph
Comments: Centrality, homophily, network formation, popularity, preferential
attachment, social capital, social networks
\\
A social network confers benefits and advantages on individuals (and on
groups), the literature refers to these advantages as social capital. This
paper presents a micro-founded mathematical model of the evolution of a
social
network and of the social capital of individuals within the network. The
evolution of the network is influenced by the extent to which individuals
are
homophilic, structurally opportunistic, socially gregarious and by the
distribution of types in the society. In the analysis, we identify different
kinds of social capital: bonding capital, popularity capital, and bridging
capital. Bonding capital is created by forming a circle of connections,
homophily increases bonding capital because it makes this circle of
connections
more homogeneous. Popularity capital leads to preferential attachment:
individuals who become popular tend to become more popular because others
are
more likely to link to them. Homophily creates asymmetries in the levels of
popularity attained by different social groups, more gregarious types of
agents
are more likely to become popular. However, in homophilic societies,
individuals who belong to less gregarious, less opportunistic, or major
types
are likely to be more central in the network and thus acquire a bridging
capital.
\\ ( http://arxiv.org/abs/1511.02429 , 4211kb)
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\\
arXiv:1511.02562 (*cross-listing*)
Date: Mon, 9 Nov 2015 04:18:05 GMT (1843kb)

Title: Modeling the Interplay Between Individual Behavior and Network
Distributions
Authors: Yang Yang, Jie Tang, Yuxiao Dong, Qiaozhu Mei, Reid A. Johnson,
Nitesh
V. Chawla
Categories: cs.SI physics.soc-ph
\\
It is well-known that many networks follow a power-law degree
distribution;
however, the factors that influence the formation of their distributions are
still unclear. How can one model the connection between individual actions
and
network distributions? How can one explain the formation of group phenomena
and
their evolutionary patterns?
In this paper, we propose a unified framework, M3D, to model human
dynamics
in social networks from three perspectives: macro, meso, and micro. At the
micro-level, we seek to capture the way in which an individual user decides
whether to perform an action. At the meso-level, we study how group behavior
develops and evolves over time, based on individual actions. At the
macro-level, we try to understand how network distributions such as
power-law
(or heavy-tailed phenomena) can be explained by group behavior. We provide
theoretical analysis for the proposed framework, and discuss the connection
of
our framework with existing work.
The framework offers a new, flexible way to explain the interplay between
individual user actions and network distributions, and can benefit many
applications. To model heavy-tailed distributions from partially observed
individual actions and to predict the formation of group behaviors, we apply
M3D to three different genres of networks: Tencent Weibo, Citation, and
Flickr.
We also use information-burst prediction as a particular application to
quantitatively evaluate the predictive power of the proposed framework. Our
results on the Weibo indicate that M3D's prediction performance exceeds
that of
several alternative methods by up to 30\%.
\\ ( http://arxiv.org/abs/1511.02562 , 1843kb)
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arXiv:1511.02291 (*cross-listing*)
Date: Sat, 7 Nov 2015 03:18:35 GMT (616kb)

Title: Revealing a Possible Implication by Imposing Lee-Yang Theorem on the
Partition Function of the Universe
Authors: William Huanshan Chuang
Categories: gr-qc cond-mat.stat-mech
Comments: 6 pages, 2 figures. Hi ArXiv admin, I corrected a few typos. arXiv
admin note: text overlap with arXiv:1007.3086 by other authors
\\
The goals of this note are twofold: First, to revisit a mechanism
proposed by
Ho\v{r}ava and Minic\cite{Horava:2000fk} which generates a zero cosmological
constant to the Universe based on Boltzmann probability distribution and the
Holographic principle, a comparison between the zero cosmological constant
and
recent observation results is given. Secondly, in order to investigate the
possibility of phase-transition phenomena of the Universe, a further study
on
an exponential class of the partition function of the Universe, which is
given
by Shaw and Barrow \cite{Shaw:2011ij,Barrow:2011bs} was provided by
investigating the distribution of Lee-Yang zeros are given. The
contribution of
this paper is that after applying the fundamental theorem of algebra to one
action chosen from the exponential class that derived from the Shaw and
Barrow's works, the Lee-Yang theorem can be applied to the selected action,
meaning that critical phenomena might involve the growth of large-scale
structure of the Universe, and the phase transition phenomena of the
Universe
might exist during the spacetime expands.
\\ ( http://arxiv.org/abs/1511.02291 , 616kb)
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\\
arXiv:1511.02332 (*cross-listing*)
Date: Sat, 7 Nov 2015 10:19:48 GMT (22kb,D)

Title: Almost sure convergence of vertex degree densities in the
vertex-splitting model
Authors: Sigurdur \"Orn Stef\'ansson, Erik Th\"ornblad
Categories: math.PR cond-mat.stat-mech math-ph math.MP
Comments: 1 figure
MSC-class: 05C80, 05C05, 60J80
\\
We study the limiting degree distribution of the vertex splitting model
introduced in \cite{DDJS:2009}. This is a model of randomly growing ordered
trees, where in each time step the tree is separated into two components by
splitting a vertex into two, and then inserting an edge between the two new
vertices. Under some assumptions on the parameters, related to the growth of
the maximal degree of the tree, we prove that the vertex degree densities
converge almost surely to constants which satisfy a system of equations.
Using
this we are also able to strengthen and prove some previously non-rigorous
results mentioned in the literature.
\\ ( http://arxiv.org/abs/1511.02332 , 22kb)
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arXiv:1511.02382 (*cross-listing*)
Date: Sat, 7 Nov 2015 17:45:42 GMT (178kb,D)

Title: On the M\"obius transformation in the entanglement entropy of
fermionic
chains
Authors: F. Ares, J. G. Esteve, F. Falceto, A. R. de Queiroz
Categories: math-ph cond-mat.stat-mech hep-th math.MP quant-ph
Comments: 25 pages, 3 figures
\\
There is an intimate relation between entanglement entropy and Riemann
surfaces. This fact is explicitly noticed for the case of quadratic
fermionic
Hamiltonians with finite range couplings. After recollecting this fact, we
make
a comprehensive analysis of the action of the M\"obius transformations on
the
Riemann surface. We are then able to uncover the origin of some symmetries
and
dualities of the entanglement entropy already noticed recently in the
literature. These results give further support for the use of entanglement
entropy to analyse phase transition.
\\ ( http://arxiv.org/abs/1511.02382 , 178kb)
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\\
arXiv:1511.02437 (*cross-listing*)
Date: Sun, 8 Nov 2015 03:47:58 GMT (578kb,D)

Title: Complex saddle points and the sign problem in complex Langevin
simulation
Authors: Tomoya Hayata, Yoshimasa Hidaka, Yuya Tanizaki
Categories: hep-lat cond-mat.stat-mech hep-th
Comments: 6 pages, 5 figures
Report-no: RIKEN-QHP-202, RIKEN-STAMP-17
\\
We show that complex Langevin simulation converges to a wrong result, by
relating it to the Lefschetz-thimble path integral, when the path-integral
weight has different phases among dominant complex saddle points.
Equilibrium
solution of the complex Langevin equation forms local distributions around
complex saddle points. Its ensemble average approximately becomes a direct
sum
of the average in each local distribution, where relative phases among them
are
dropped. We propose that by taking these phases into account through
reweighting, we can solve the wrong convergence problem. However, this
prescription may lead to a recurrence of the sign problem in the complex
Langevin method for quantum many-body systems.
\\ ( http://arxiv.org/abs/1511.02437 , 578kb)
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\\
arXiv:1511.02446 (*cross-listing*)
Date: Sun, 8 Nov 2015 06:15:34 GMT (18kb)

Title: Rotationally invariant ensembles of integrable matrices
Authors: Emil A. Yuzbashyan, B. Sriram Shastry, Jasen A. Scaramazza
Categories: math-ph cond-mat.stat-mech math.MP
Comments: 10 pages
\\
We construct ensembles of random integrable matrices with any prescribed
number of nontrivial integrals and formulate integrable matrix theory (IMT)
--
a counterpart of random matrix theory (RMT) for quantum integrable models. A
type-M family of integrable matrices consists of exactly N-M independent
commuting N-by-N matrices linear in a real parameter. We first develop a
rotationally invariant parameterization of such matrices, previously only
constructed in a preferred basis. For example, an arbitrary choice of a
vector
and two commuting Hermitian matrices defines a type-1 family and vice versa.
Higher types similarly involve a random vector and two matrices. The
basis-independent formulation allows us to derive the joint probability
density
for integrable matrices, in a manner similar to the construction of Gaussian
ensembles in the RMT.
\\ ( http://arxiv.org/abs/1511.02446 , 18kb)
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\\
arXiv:1511.02613 (*cross-listing*)
Date: Mon, 9 Nov 2015 09:41:42 GMT (4580kb,D)

Title: Nonadditivity of Critical Casimir Forces
Authors: Sathyanarayana Paladugu, Agnese Callegari, Yazgan Tuna, Lukas
Barth,
Siegfried Dietrich, Andrea Gambassi, Giovanni Volpe
Categories: cond-mat.soft cond-mat.stat-mech physics.optics
Comments: 12 pages, 8 figures
\\
In soft and condensed matter physics, effective interactions often emerge
as
a result of the spatial confinement of a fluctuating field. For instance,
microscopic particles in a binary liquid mixture are subject to critical
Casimir forces whenever their surfaces confine the thermal fluctuations of
the
order parameter of this kind of solvent, the range of which diverges upon
approaching the critical demixing point. Critical Casimir forces are
predicted
to be nonadditive on a particular large scale. However, a direct
experimental
evidence of this fact is still lacking. Here, we fill in this gap by
reporting
the experimental measurement of the associated many-body effects. In
particular, we focus on three colloidal particles in optical traps and
observe
that the critical Casimir force exerted on one of them by the other two
colloids differs from the sum of the forces they exert separately. The
magnitude and range of this three-body effect turn out to depend
sensitively on
the distance from the critical point of the solvent and on the preferential
adsorption at the surfaces of the colloids for the two components of the
mixture.
\\ ( http://arxiv.org/abs/1511.02613 , 4580kb)
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\\
arXiv:1511.02835 (*cross-listing*)
Date: Mon, 9 Nov 2015 20:43:22 GMT (14kb)

Title: Variational Approach and Deformed Derivatives
Authors: Jos\'e Weberszpil and Jos\'e Abdalla Helay\"el-Neto
Categories: math-ph cond-mat.stat-mech hep-th math.MP nlin.SI quant-ph
Comments: 13 pages. arXiv admin note: text overlap with arXiv:1502.07606
\\
Recently, we have demonstrated that there exists a possible relationship
between q-deformed algebras in two different contexts of Statistical
Mechanics,
namely, the Tsallis' framework and the Kaniadakis' scenario, with a local
form
of fractional-derivative operators for fractal media, the so-called
Hausdorff
derivatives, mapped into a continuous medium with a fractal measure. Here,
in
this paper, we present an extension of the traditional calculus of
variations
for systems containing deformed-derivatives embedded into the Lagrangian and
the Lagrangian densities for classical and field systems. The results extend
the classical Euler-Lagrange equations and the Hamiltonian formalism. The
resulting dynamical equations seem to be compatible with those found in the
literature, specially with mass-dependent and with nonlinear equations for
systems in classical and quantum mechanics. Examples are presented to
illustrate applications of the formulation. Also, the conserved Nether
current,
are worked out.
\\ ( http://arxiv.org/abs/1511.02835 , 14kb)
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arXiv:1304.1080
replaced with revised version Mon, 9 Nov 2015 08:27:37 GMT (20kb)

Title: Off-Diagonal Ekpyrotic Scenarios and Equivalence of Modified, Massive
and/or Einstein Gravity
Authors: Sergiu I. Vacaru
Categories: physics.gen-ph
Comments: latex2e, 12pt, 12 pages, v4 with up-dated affiliations and
substantial modifications requested by editor and referee and accepted by
Phys. Lett. B
\\ ( http://arxiv.org/abs/1304.1080 , 20kb)
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\\
arXiv:1403.7004
replaced with revised version Mon, 9 Nov 2015 16:42:24 GMT (309kb)

Title: Structural consequences of the coupling of gravitons
Authors: Walter Gessner
Categories: physics.gen-ph
Comments: 9 pages, 0 figures
\\ ( http://arxiv.org/abs/1403.7004 , 309kb)
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\\
arXiv:1507.03515
replaced with revised version Sun, 8 Nov 2015 05:58:10 GMT (12kb)

Title: Anisotropic dark energy model with a hybrid scale factor
Authors: B. Mishra and S.K. Tripathy
Categories: physics.gen-ph
Journal-ref: Modern Physics Letters A, VOl 30, No 36 (2015)1550175
DOI: 10.1142/S0217732315501758
\\ ( http://arxiv.org/abs/1507.03515 , 12kb)
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\\
arXiv:1505.00312
replaced with revised version Mon, 9 Nov 2015 05:06:40 GMT (486kb)

Title: The Descent of Math
Authors: Sara Imari Walker
Categories: physics.hist-ph
Comments: 8 pages, Entry in 2015 FQXI Essay Competition
\\ ( http://arxiv.org/abs/1505.00312 , 486kb)
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\\
arXiv:1502.06776
replaced with revised version Mon, 9 Nov 2015 09:23:58 GMT (1465kb)

Title: Quantitatively Analyzing Phonon Spectral Contribution of Thermal
Conductivity Based on Non-Equilibrium Molecular Dynamics Simulation I:
From
Space Fourier Transform
Authors: Yanguang Zhou, Xiaoliang Zhang, and Ming Hu
Categories: cond-mat.mtrl-sci
\\ ( http://arxiv.org/abs/1502.06776 , 1465kb)
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\\
arXiv:1503.04790
replaced with revised version Sat, 7 Nov 2015 19:14:44 GMT (4058kb)

Title: Spin-fluctuation mechanism of anomalous temperature dependence of
magnetocrystalline anisotropy in itinerant magnets
Authors: Ivan A. Zhuravlev, Vladimir P. Antropov, and Kirill D. Belashchenko
Categories: cond-mat.mtrl-sci
Comments: 9 pages, 10 figures (including supplemental material)
\\ ( http://arxiv.org/abs/1503.04790 , 4058kb)
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\\
arXiv:1505.05904
replaced with revised version Mon, 9 Nov 2015 15:41:45 GMT (976kb)

Title: Grain boundary character distributions in nanocrystalline metals
produced by different processing routes
Authors: David B. Bober, Amirhossein Khalajhedayati, Mukul Kumar, Timothy J.
Rupert
Categories: cond-mat.mtrl-sci
Comments: 14 figures
\\ ( http://arxiv.org/abs/1505.05904 , 976kb)
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\\
arXiv:1510.02688
replaced with revised version Sun, 8 Nov 2015 22:05:01 GMT (783kb,D)

Title: Better Band Gaps with Asymptotically Corrected Local Exchange
Potentials
Authors: Prashant Singh, Manoj K. Harbola, M. Hemanadhan, Abhijit Mookerjee,
and D. D. Johnson
Categories: cond-mat.mtrl-sci
Comments: 8 pages, 3 figures
\\ ( http://arxiv.org/abs/1510.02688 , 783kb)
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\\
arXiv:1511.02070
replaced with revised version Mon, 9 Nov 2015 14:28:01 GMT (1435kb)

Title: Investigations on the energy balance in TDCB tests
Authors: Olaf Hesebeck, Udo Meyer, Andrea Sondag, Markus Brede
Categories: cond-mat.mtrl-sci
\\ ( http://arxiv.org/abs/1511.02070 , 1435kb)
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\\
arXiv:1506.00464
replaced with revised version Mon, 9 Nov 2015 12:05:41 GMT (533kb)

Title: Coupled normal fluid and superfluid profiles of turbulent helium II
in
channels
Authors: Luca Galantucci, Michele Sciacca, Carlo F. Barenghi
Categories: cond-mat.other physics.flu-dyn
Comments: 26 pages, 8 Figures, accepted for publication in Phys. Rev. B
\\ ( http://arxiv.org/abs/1506.00464 , 533kb)
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\\
arXiv:1405.0493
replaced with revised version Sat, 7 Nov 2015 14:28:28 GMT (9kb)

Title: Consciousness as a State of Matter
Authors: Max Tegmark (MIT)
Categories: physics.pop-ph
Comments: Minor typos corrected
Journal-ref: New Scientist, April 12 2014, p 28-31
\\ ( http://arxiv.org/abs/1405.0493 , 9kb)
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\\
arXiv:1408.4355
replaced with revised version Sun, 8 Nov 2015 14:23:47 GMT (217kb)

Title: Weighted Hypernetworks
Authors: Jin-Li Guo and Xin-Yun Zhu
Categories: physics.soc-ph cs.SI
Comments: 13 pages, 3 figures
\\ ( http://arxiv.org/abs/1408.4355 , 217kb)
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\\
arXiv:1502.07393
replaced with revised version Mon, 9 Nov 2015 20:58:32 GMT (2518kb)

Title: Crowdfunding Astronomy with Google Sky
Authors: Travis S. Metcalfe (White Dwarf Research Corp.)
Categories: physics.soc-ph astro-ph.IM physics.pop-ph
Comments: 7 pages, 3 figures, Journal of Astronomy & Earth Sciences
Education,
accepted. Project website is at http://adoptastar.whitedwarf.org
\\ ( http://arxiv.org/abs/1502.07393 , 2518kb)
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\\
arXiv:1508.03571
replaced with revised version Fri, 6 Nov 2015 22:34:28 GMT (4171kb,D)

Title: From innovation to diversification: a simple competitive model
Authors: Fabio Saracco, Riccardo Di Clemente, Andrea Gabrielli and Luciano
Pietronero
Categories: physics.soc-ph physics.data-an q-fin.GN
Comments: 8 figures, 8 tables
Journal-ref: PloS One 10(11): e0140420 (2015)
DOI: 10.1371/journal.pone.0140420
\\ ( http://arxiv.org/abs/1508.03571 , 4171kb)
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\\
arXiv:1508.05288
replaced with revised version Mon, 9 Nov 2015 10:32:13 GMT (365kb,D)

Title: Dynamics of Human Cooperation in Economic Games
Authors: Martin Spanknebel and Klaus Pawelzik
Categories: physics.soc-ph cs.GT cs.LG math.DS
\\ ( http://arxiv.org/abs/1508.05288 , 365kb)
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\\
arXiv:1507.04920
replaced with revised version Mon, 9 Nov 2015 13:11:04 GMT (2319kb,D)

Title: $c$-function and central charge of the sine-Gordon model from the
non-perturbative renormalization group flow
Authors: V. Bacs\'o, N. Defenu, A. Trombettoni, I. N\'andori
Categories: cond-mat.stat-mech hep-th
Comments: 9 pages, 4 figures, v1, to be published on Nucl. Phys. B
\\ ( http://arxiv.org/abs/1507.04920 , 2319kb)
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\\
arXiv:1507.07812
replaced with revised version Sat, 7 Nov 2015 12:18:12 GMT (20kb)

Title: Comparison between Smoluchowski and Boltzmann approaches for
self-propelled rods
Authors: Eric Bertin, Aparna Baskaran, Hugues Chat\'e, M. Cristina Marchetti
Categories: cond-mat.stat-mech cond-mat.soft
Comments: 11 pages, final version published in Phys. Rev. E
Journal-ref: Phys. Rev. E 92, 042141 (2015)
DOI: 10.1103/PhysRevE.92.042141
\\ ( http://arxiv.org/abs/1507.07812 , 20kb)
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\\
arXiv:1507.08962
replaced with revised version Sat, 7 Nov 2015 03:24:42 GMT (1549kb)

Title: Emerging activity in bilayered dispersions with wake-mediated
interactions
Authors: J\"org Bartnick, Andreas Kaiser, Hartmut L\"owen, Alexei Ivlev
Categories: cond-mat.stat-mech cond-mat.soft
Comments: 5 pages, 4 figures
\\ ( http://arxiv.org/abs/1507.08962 , 1549kb)
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\\
arXiv:1508.04042
replaced with revised version Mon, 9 Nov 2015 14:29:32 GMT (1986kb)

Title: Work fluctuation-dissipation trade-off in heat engines
Authors: Ken Funo and Masahito Ueda
Categories: cond-mat.stat-mech quant-ph
Comments: 16 pages, 4 figures
\\ ( http://arxiv.org/abs/1508.04042 , 1986kb)
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\\
arXiv:1509.06145
replaced with revised version Sun, 8 Nov 2015 16:35:17 GMT (2714kb,D)

Title: Caliber based spectral gap optimization of order parameters (SGOOP)
for
sampling complex molecular systems
Authors: Pratyush Tiwary and B. J. Berne
Categories: cond-mat.stat-mech cond-mat.soft physics.chem-ph
Comments: 7 pages, 4 figures; corrected missing figure number and added a
reference
\\ ( http://arxiv.org/abs/1509.06145 , 2714kb)
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\\
arXiv:1510.03636
replaced with revised version Sat, 7 Nov 2015 08:15:35 GMT (469kb)

Title: Maximal Density and Percolation Threshold of Loose Packed Lattices
Authors: Isak Avramov and Vesselin Tonchev
Categories: cond-mat.stat-mech cond-mat.mtrl-sci
Comments: 10 pages, 5 figures
\\ ( http://arxiv.org/abs/1510.03636 , 469kb)
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\\
arXiv:1510.05810
replaced with revised version Sat, 7 Nov 2015 03:52:46 GMT (3308kb)

Title: Yang-Baxter integrable models in experiments: from condensed matter
to
ultracold atoms
Authors: Murray T. Batchelor and Angela Foerster
Categories: cond-mat.stat-mech math-ph math.MP quant-ph
Comments: 25 pages, 14 figures. Review article intended for Exactly Solved
Models and Beyond: a special issue in honour of R J Baxter's 75th
birthday in
J Phys A. Additional references, comments welcome
\\ ( http://arxiv.org/abs/1510.05810 , 3308kb)
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\\
arXiv:1508.01140 (*cross-listing*)
replaced with revised version Fri, 6 Nov 2015 15:05:21 GMT (121kb,D)

Title: Disentangling the Quantum World
Authors: Huw Price and Ken Wharton
Categories: quant-ph physics.hist-ph physics.pop-ph
Comments: 17 pages, 3 figures; significant revisions in response to
referees'
comments
\\ ( http://arxiv.org/abs/1508.01140 , 121kb)
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\\
arXiv:1510.06712 (*cross-listing*)
replaced with revised version Thu, 5 Nov 2015 15:39:15 GMT (9kb)

Title: A Live Alternative to Quantum Spooks
Authors: Huw Price and Ken Wharton
Categories: quant-ph physics.hist-ph physics.pop-ph
Comments: 7 pages; minor revisions
\\ ( http://arxiv.org/abs/1510.06712 , 9kb)
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\\
arXiv:1506.05767
replaced with revised version Sat, 7 Nov 2015 16:06:31 GMT (113kb,D)

Title: Electron spin coherence of shallow donors in natural and isotopically
enriched germanium
Authors: A. J. Sigillito, R. M. Jock, A. M. Tyryshkin, J. W. Beeman, E. E.
Haller, K. M. Itoh, and S. A. Lyon
Categories: cond-mat.mes-hall cond-mat.mtrl-sci quant-ph
\\ ( http://arxiv.org/abs/1506.05767 , 113kb)
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\\
arXiv:1508.04605
replaced with revised version Mon, 9 Nov 2015 10:24:29 GMT (5305kb,D)

Title: Argument on superconductivity pairing mechanism from cobalt impurity
doping in FeSe: spin ($s_{\pm}$) or orbital ($s_{++}$) fluctuation
Authors: T. Urata, Y. Tanabe, K. K. Huynh, Y. Yamakawa, H. Kontani, and K.
Tanigaki
Categories: cond-mat.supr-con cond-mat.mtrl-sci cond-mat.str-el
Comments: 10page, 11figures
\\ ( http://arxiv.org/abs/1508.04605 , 5305kb)
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\\
arXiv:1510.00808
replaced with revised version Mon, 9 Nov 2015 00:02:52 GMT (352kb)

Title: Strong Suppression of the Spin Hall Effect in the Spin Glass State
Authors: Y. Niimi, M. Kimata, Y. Omori, B. Gu, T. Ziman, S. Maekawa, A.
Fert,
and Y. Otani
Categories: cond-mat.mes-hall cond-mat.mtrl-sci
Comments: 5 pages, 4 figures
Journal-ref: Phys. Rev. Lett. 115, 196602 (2015)
DOI: 10.1103/PhysRevLett.115.196602
\\ ( http://arxiv.org/abs/1510.00808 , 352kb)
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\\
arXiv:1510.03263
replaced with revised version Mon, 9 Nov 2015 06:55:51 GMT (2531kb)

Title: Anomalous polarization dependence of Raman scattering and
crystallographic orientation of black phosphorus
Authors: Jungcheol Kim, Jae-Ung Lee, Jinhwan Lee, Hyo Ju Park, Zonghoon Lee,
Changgu Lee and Hyeonsik Cheong
Categories: cond-mat.mes-hall cond-mat.mtrl-sci
Comments: 22+7 pages, 8+5 figures
Journal-ref: Nanoscale, 7, 18708-18715 (2015)
DOI: 10.1039/C5NR04349B
\\ ( http://arxiv.org/abs/1510.03263 , 2531kb)
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\\
arXiv:1511.01302
replaced with revised version Mon, 9 Nov 2015 13:49:10 GMT (1986kb)

Title: TRIQS/DFTTools: A TRIQS application for ab initio calculations of
correlated materials
Authors: Markus Aichhorn, Leonid Pourovskii, Priyanka Seth, Veronica
Vildosola,
Manuel Zingl, Oleg E. Peil, Xiaoyu Deng, Jernej Mravlje, Gernot J.
Kraberger,
Cyril Martins, Michel Ferrero, Olivier Parcollet
Categories: cond-mat.str-el cond-mat.mtrl-sci
Comments: 18 pages, 6 figures
\\ ( http://arxiv.org/abs/1511.01302 , 1986kb)
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\\
arXiv:0905.1911
replaced with revised version Mon, 9 Nov 2015 18:49:53 GMT (56kb)

Title: Heisenberg Symmetry and Collective Modes of One Dimensional Unitary
Correlated Fermions
Authors: Kumar Abhinav, Chandrasekhar Bhamidipati, Vivek M Vyas, Prasanta K.
Panigrahi
Categories: cond-mat.quant-gas cond-mat.other
Comments: 5 pages, revamped version for clarity
\\ ( http://arxiv.org/abs/0905.1911 , 56kb)
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arXiv:1412.5601 (*cross-listing*)
replaced with revised version Sat, 7 Nov 2015 04:59:49 GMT (400kb,D)

Title: Effective field theory for spacetime symmetry breaking
Authors: Yoshimasa Hidaka, Toshifumi Noumi, Gary Shiu
Categories: hep-th astro-ph.CO cond-mat.other hep-ph
Comments: 59 pages, 4 figures; v2: minor revision, published version.
Appendix
B is added
Report-no: RIKEN-MP-96, RIKEN-QHP-171, MAD-TH-14-10
Journal-ref: Phys. Rev. D 92, 045020 (2015)
DOI: 10.1103/PhysRevD.92.045020
\\ ( http://arxiv.org/abs/1412.5601 , 400kb)
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arXiv:1505.00457 (*cross-listing*)
replaced with revised version Sat, 7 Nov 2015 08:40:41 GMT (8447kb,D)

Title: Modeling Memetics using Edge Diversity
Authors: Akrati Saxena, S.R.S. Iyengar, Yayati Gupta
Categories: cs.SI physics.soc-ph
\\ ( http://arxiv.org/abs/1505.00457 , 8447kb)
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arXiv:1507.07838 (*cross-listing*)
replaced with revised version Sat, 7 Nov 2015 08:47:37 GMT (1595kb,D)

Title: Shifting Behaviour of Users: Towards Understanding the Fundamental
Law
of Social Networks
Authors: Yayati Gupta, S. R. S. Iyengar, Jaspal Singh Saini and Nidhi
Sridhar
Categories: cs.SI physics.soc-ph
\\ ( http://arxiv.org/abs/1507.07838 , 1595kb)
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\\
arXiv:1510.03059 (*cross-listing*)
replaced with revised version Mon, 9 Nov 2015 17:08:36 GMT (242kb,D)

Title: Influence of network topology on cooperative problem-solving systems
Authors: Jos\'e F. Fontanari and Francisco A. Rodrigues
Categories: cs.SI nlin.AO physics.soc-ph
\\ ( http://arxiv.org/abs/1510.03059 , 242kb)
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arXiv:1412.7320 (*cross-listing*)
replaced with revised version Mon, 9 Nov 2015 11:21:36 GMT (87kb)

Title: Nonlocal random motions: The trapping problem
Authors: Piotr Garbaczewski, Mariusz \.Zaba
Categories: math-ph cond-mat.stat-mech math.MP quant-ph
Comments: 11 pp, 7 figures. In this version, minor correction next to Eq.
(7)
Journal-ref: Acta Phys. Pol. B 46 (2), 231-246, (2015)
DOI: 10.5506/APhysPolB.46.231
\\ ( http://arxiv.org/abs/1412.7320 , 87kb)
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arXiv:1505.07850 (*cross-listing*)
replaced with revised version Mon, 9 Nov 2015 01:57:26 GMT (30kb,D)

Title: Quantum speed limits for leakage and decoherence
Authors: Iman Marvian and Daniel A. Lidar
Categories: quant-ph cond-mat.stat-mech
Comments: 4 pages+15 pages Supplementary Material, references added, minor
edits and clarifications, published version
\\ ( http://arxiv.org/abs/1505.07850 , 30kb)
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\\
arXiv:1510.04394
replaced with revised version Mon, 9 Nov 2015 15:25:18 GMT (299kb)

Title: Moderate Point: Balanced Entropy and Enthalpy Contributions in Soft
Matter
Authors: Yanting Wang
Categories: cond-mat.soft cond-mat.stat-mech
Comments: 4 Page, 3 figures
\\ ( http://arxiv.org/abs/1510.04394 , 299kb)
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\\
arXiv:1511.01330 (*cross-listing*)
replaced with revised version Sun, 8 Nov 2015 15:18:31 GMT (9kb)

Title: Entangling Fractals
Authors: Amin Faraji Astaneh
Categories: hep-th cond-mat.stat-mech
Comments: 4 pages, Typos fixed, References and comments added
\\ ( http://arxiv.org/abs/1511.01330 , 9kb)
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