title: Some duality and equivalence results

abstract:
  Let $(R,\fm)$ be a relative Cohen-Macaulay local ring with respect to an
ideal $\fa$ of $R$ and set $c:=\h\fa$. In this paper, we investigate some
properties of the Matlis dual $\H_{\fa}^c(R)^{\vee}$ of the $R$-module
$\H_{\fa}^c(R)$ and we show that such modules treat like canonical modules over
Cohen-Macaulay local rings. Also, we provide some duality and equivalence
results with respect to the module $\H_{\fa}^c(R)^{\vee}$ and so these results
lead to achieve generalizations of some known results, such as the Local
Duality Theorem, which have been provided over a Cohen-Macaulay local ring
which admits a canonical module.


title:
The Foldy-Lax approximation of the scattered waves by many small bodies
  for the Lame system

abstract:
  We are concerned with the linearized, isotropic and homogeneous elastic
scattering problem by many small rigid obstacles of arbitrary, Lipschitz
regular, shapes in 3D case. We prove that there exists two constant $a_0$ and
$c_0$, depending only on the Lipschitz character of the obstacles, such that
under the conditions $a\leq a_0$ and $\sqrt{M-1}\frac{a}{d} \leq c_0$ on the
number $M$ of the obstacles, their maximum diameter $a$ and the minimum
distance between them $d$, the corresponding Foldy-Lax approximation of the
farfields is valid. In addition, we provide the error of this approximation
explicitly in terms of the three parameters $M, a$ and $d$. These
approximations can be used, in particular, in the identification problems (i.e.
inverse problems) and in the design problems (i.e. effective medium theory).


title: Continuity of the Peierls barrier and robustness of laminations

abstract:
  We study the Peierls barrier for a broad class of monotone variational
problems. These problems arise naturally in solid state physics and from
Hamiltonian twist maps.
  We start with the case of a fixed local potential and derive an estimate for
the difference of the periodic Peierls barrier and the Peierls barrier of a
general rotation number in a given point. A similar estimate was obtained by
Mather in the context of twist maps, but our proof is different and applies
more generally. It follows from the estimate that the Peierls barrier is
continuous at irrational points.
  Moreover, we show that the Peierls barrier depends continuously on parameters
and hence that the property that a monotone variational problem admits a
lamination of minimizers for a given rotation number, is open in the
C1-topology.


title: Graphs whose indecomposability graph is 2-covered

abstract:
  Given a graph $G=(V,E)$, a subset $X$ of $V$ is an interval of $G$ provided
that for any $a, b\in X$ and $ x\in V \setminus X$, $\{a,x\}\in E$ if and only
if $\{b,x\}\in E$. For example, $\emptyset$, $\{x\}(x\in V)$ and $V$ are
intervals of $G$, called trivial intervals. A graph whose intervals are trivial
is indecomposable; otherwise, it is decomposable. According to Ille, the
indecomposability graph of an undirected indecomposable graph $G$ is the graph
$\mathbb I(G)$ whose vertices are those of $G$ and edges are the unordered
pairs of distinct vertices $\{x,y\}$ such that the induced subgraph $G[V
\setminus \{x,y\}]$ is indecomposable. We characterize the indecomposable
graphs $G$ whose $\mathbb I(G)$ admits a vertex cover of size 2.


title: Implications of Higgs Sterility for the Higgs and Stop Sectors

abstract:
  The LHC data implies that the newly discovered Higgs boson h may be sterile
(highly SM-like). In supersymmetric SMs (SSMs), Higgs couplings are often
modified by Higgs mixing and stop loop corrections, so we study the Higgs
sterility in the Higgs and stop sectors in two SSMs: (I) The Minimal SSM
(MSSM). In the nearly decoupling region, the doublet-doublet mixing effect can
only enhance C_{hb\bar b} by 2m_Z^2/M_A^2. Sterility places M_A\gtrsim 900 GeV.
But it hardly constrains the stop sector due to the heaviness of Higgs boson
mass m_h; (II) The next to MSSM(NMSSM). In the presence of doublet-singlet
mixing, the mixing structure is complicated. We find a simple approximation to
understand Higgs sterility and its implications, says the amount of pushing-up
m_h\lesssim 5 GeV while the pulling-down scenario is favored. Stops can be
light here, so Higgs sterility significantly constrains them directly and
indirectly except for blind spots. We also study the LHC features of the whole
stop sector facing a sterile Higgs and find that, in virtue of decays between
stops and sbottom, characteristic signatures like same-sign leptons and multi
b-jets are promising probes.


title:
Topological black holes for Einstein-Gauss-Bonnet gravity with a
  nonminimal scalar field

abstract:
  We consider the Einstein-Gauss-Bonnet gravity with a negative cosmological
constant together with a source given by a scalar field nonminimally coupled in
arbitrary dimension D. For a certain election of the cosmological and
Gauss-Bonnet coupling constants, we derive two classes of AdS black hole
solutions whose horizon is planar. The first family of black holes obtained for
a particular value of the nonminimal coupling parameter only depends on a
constant M, and the scalar field vanishes as M=0. The second class of solutions
corresponds to a two-parametric (with constants M and A) black hole stealth
configuration, that is a nontrivial scalar field with a black hole metric such
that both side (gravity and matter parts) of the Einstein equations vanishes.
In this case, in the vanishing M, the solution reduces to a stealth scalar
field on the pure AdS metric. We note that the existence of these two classes
of solutions is inherent of the particular choice of the coupling constants
and, they can not be promoted to spherical or hyperboloid black hole solutions
in a standard fashion. In the last part, we add to the original action some
exacts (D-1)-forms coupled to the scalar field. The direct benefit of
introducing such extra fields is to obtain black hole solutions with planar
horizon for arbitrary value of the nonminimal coupling parameter.


title: Quasi-static thermal evolution of compact objects

abstract:
  We study under what conditions the thermal peeling is present for dissipative
local and quasi-local anisotropic spherical matter configurations. The thermal
peeling occurs when different signs in the velocity of fluid elements appears,
giving rise to the splitting of the matter configuration. The evolution is
considered in the quasi-static approximation and the matter contents are
radiant, anisotropic (unequal stresses) spherical local and quasi-local fluids.
The heat flux and the associated temperature profiles are described by causal
thermodynamics consistent with this approximation. It is found some particular,
local and quasi-local equation of state for ultra-dense matter configurations
exhibit thermal peeling when most of the radiated energy is concentrated at the
middle of the distribution. This effect, which appears to be associated with
extreme astrophysical scenarios (highly relativistic and very luminous
gravitational system expelling its outer mass shells), is very sensible to
energy flux profile and to the shape of the luminosity emitted by the compact
object.


title:
Affine Grassmannians of group schemes and exotic principal bundles over
  A^1

abstract:
  Let G be a simple simply-connected group scheme over a regular local scheme
U. Let E be a principal G-bundle over A^1_U trivial away from a subscheme
finite over U. We show that E is not necessarily trivial and give some criteria
of triviality. To this end we define affine Grassmannians for group schemes and
study their Bruhat decompositions for semi-simple group schemes. We also give
examples of principal G-bundles over A^1_U with split G such that the bundles
are not isomorphic to pull-backs from U.


title:
Steady-State Entanglement in the Nuclear Spin Dynamics of a Double
  Quantum Dot

abstract:
  We propose a scheme for the deterministic generation of steady-state
entanglement between the two nuclear spin ensembles in an electrically defined
double quantum dot. Due to quantum interference in the collective coupling to
the electronic degrees of freedom, the nuclear system is actively driven into a
two-mode squeezed-like target state. The entanglement build-up is accompanied
by a self-polarization of the nuclear spins towards large Overhauser field
gradients. Moreover, the feedback between the electronic and nuclear dynamics
leads to multi-stability and criticality in the steady-state solutions.


title: Average Drift Analysis and Population Scalability

abstract:
  This paper aims to study how the population size affects the computation time
of evolutionary algorithms in a rigorous way. The computation time of an
evolutionary algorithm can be measured by either the expected number of
generations (hitting time) or the expected number of fitness evaluations
(running time) to find an optimal solution. Population scalability is the ratio
of the expected hitting time between a benchmark algorithm and an algorithm
using a larger population size. Average drift analysis is presented for
comparing the expected hitting time of two algorithms and estimating lower and
upper bounds on population scalability. Several intuitive beliefs are
rigorously analysed. It is prove that (1) using a population sometimes
increases rather than decreases the expected hitting time; (2) using a
population cannot shorten the expected running time of any elitist evolutionary
algorithm on unimodal functions in terms of the time-fitness landscape, but
this is not true in terms of the distance-based fitness landscape; (3) using a
population cannot always reduce the expected running time on fully-deceptive
functions, which depends on the benchmark algorithm using elitist selection or
random selection.


title: Chaotic Systems with Absorption

abstract:
  Motivated by applications in optics and acoustics we develop a
dynamical-system approach to describe absorption in chaotic systems. We
introduce an operator formalism from which we obtain (i) a general formula for
the escape rate $\kappa$ in terms of the natural conditionally-invariant
measure of the system; (ii) an increased multifractality when compared to the
spectrum of dimensions $D_q$ obtained without taking absorption and return
times into account; and (iii) a generalization of the Kantz-Grassberger formula
that expresses $D_1$ in terms of $\kappa$, the positive Lyapunov exponent, the
average return time, and a new quantity, the reflection rate. Simulations in
the cardioid billiard confirm these results.


title: A Modified Gas-Kinetic Scheme for Turbulent Flow

abstract:
  By analogy with the kinetic theory of gases, most turbulence modeling strate-
gies rely on an eddy viscosity to model the unresolved turbulent fluctuations.
How- ever, the ratio of unresolved to resolved scales - very much like a degree
of rarefaction - is not taken into account by the popular conventional schemes,
based on the Navier- Stokes equations. This paper investigates the simulation
of turbulent flow with a gas- kinetic scheme. In so doing, the modeling of
turbulence becomes part of the numerical scheme: the degree of rarefaction is
automatically taken into account; the turbulent stress tensor is not
constrained into a linear relation with the strain rate. Instead it is modeled
on the basis of the analogy between particles and eddies, without any as-
sumptions on the type of turbulence or flow class. The implementation of a
turbulent gas-kinetic scheme into a finite-volume solver is put forward, with
turbulent kinetic energy and dissipation supplied by an allied turbulence
model. A number of flow cases, challenging for conventional RANS methods, are
investigated; results show that the shock-turbulent boundary layer is captured
in a much more convincing way by the gas-kinetic scheme.


title:
On certain hypergeometric identities deducible by using beta integral
  method

abstract:
  The aim of this research paper is to demonstrate how one can obtain eleven
new and interesting hypergeometric identities (in the form of a single result)
from the old ones by mainly applying the well known beta integral method which
was used successfully and systematically by Krattenthaler and Rao in their well
known, very interesting research papers. The results are derived with the help
of generalization of a quadratic transformation formula due to Kummer very
recently obtained by Kim, et al. . Several identities including one obtained
earlier by Krattenthaler and Rao follow special cases of our main findings. The
results established in this paper are simple, interesting, easily established
and may be potentially useful.


title: Limits on Fourth Generation Fermions

abstract:
  We present recent results on searches for the fourth generation quarks
performed at the CMS and ATLAS experiments at LHC.


title:
Higgs revised in Supersymmetric Economical 3-3-1 model with B/\mu-type
  terms

abstract:
  We re-investigate the scalar potential and the Higgs sector of the
supersymmetric economical 3-3-1 model (SUSYE331) in the presence of the B/\mu
type terms which has many important consequences. First, the model contains no
massless Higgs fields. Second, we prove that the soft mass parameters of
Higgses must be at the SU(3)_L scale. As a result, the masses of the Higgses
drift toward this scale except one light real neutral Higgs with the mass of
m_Z|cos(2\gamma)| at the tree level. We also show that there are some Higgses
containing many properties of the Higgses in the minimal supersymmetric
standard model (MSSM), especially in the neutral Higgs sector. One exact
relation in the MSSM, m^2_H^{+/-}=m^2_A+m^2_W, is still true in the SUSYE331.
Based on this result we make some comments on the lepton flavor violating
decays of these Higgses as one of signatures of new physics in the SUSYE331
model which may be detected by present colliders.


title:
Lifting geometric objects to the dual of the first jet bundle of a
  bundle fibred over R

abstract:
  We study natural lifting operations from a bundle E over R to the dual bundle
of its first-jet bundle. The main purpose is to define a complete lift of a
type (1,1) tensor field on E and to understand all features of its
construction. Various other lifting operations of tensorial objects on E are
needed for that purpose. We prove that the complete lift of a type (1,1) tensor
with vanishing Nijenhuis torsion gives rise to a Poisson-Nijenhuis structure on
the dual of the first-jet bundle, and discuss in detail how the construction of
associated Darboux-Nijenhuis coordinates can be carried out.


title:
Dynamical free energy and the Loschmidt-echo for a class of quantum
  quenches in the Heisenberg spin chain

abstract:
  We consider a class of global quantum quenches in the Heisenberg XXZ spin
chain, where the initial states are given by products of local two-site states.
The two main examples are the N\'eel state and the dimer state. We derive an
exact analytic result for the "Loschmidt echo per site" at imaginary times and
also consider the analytic continuation back to real times. As a by-product we
obtain an exact result for the "overlap per site" between the N\'eel state and
the ground state of the XXZ Hamiltonian in the massive regime.


title: Vortex Motion on Surfaces of Small Curvature

abstract:
  We consider a single Abelian Higgs vortex on a surface {\Sigma} whose
Gaussian curvature K is small relative to the size of the vortex, and analyse
vortex motion by using geodesics on the moduli space of static solutions. The
moduli space is {\Sigma} with a modified metric, and we propose that this
metric has a universal expansion, in terms of K and its derivatives, around the
initial metric on {\Sigma}. Using an integral expression for the K\"ahler
potential on the moduli space, we calculate the leading coefficients of this
expansion numerically, and find some evidence for their universality. The
expansion agrees to first order with the metric resulting from the Ricci flow
starting from the initial metric on {\Sigma}, but differs at higher order. We
compare the vortex motion with the motion of a point particle along geodesics
of {\Sigma}. Relative to a particle geodesic, the vortex experiences an
additional force, which to leading order is proportional to the gradient of K.
This force is analogous to the self-force on bodies of finite size that occurs
in gravitational motion.


title:
LAN property for families of distributions of solutions to Levy driven
  SDE's

abstract:
  The LAN property is proved in the statistical model based on discrete-time
observations of a solution to a L\'{e}vy driven SDE. The proof is based on a
general sufficient condition for a statistical model based on a discrete
observations of a Markov process to possess the LAN property, and involves
substantially the Malliavin calculus-based integral representations for
derivatives of log-likelihood of the model.


title: The Entropic Erd\H{o}s-Kac Limit Theorem

abstract:
  We prove entropic and total variation versions of the Erd\H{o}s-Kac limit
theorem for the maximum of the partial sums of i.i.d. random variables with
densities.


title: The L1157 protostellar outflow imaged with the SMA

abstract:
  We use the Submillimeter Array to observe, at 1.4 mm, the blue-lobe of the
L1157 outflow at high spatial resolution (~ 3"). We detected SiO, H_2CO, and
CH_3OH lines from several molecular clumps that constitute the outflow. All
three molecules were detected along the wall of the inner cavity that is
supposedly related with the later ejection event. On the other hand, no
emission was detected towards positions related to an old ejection episode,
likely due to space filtering from the interferometer. The H_2CO and CH_3OH
emission is detected only at velocities close to the systemic velocity. The
spatial distributions of the H_2CO and CH_3OH are similar. These emission lines
trace the U-shaped structure seen in the mid-infrared image. In contrast, the
SiO emission is detected in wider velocity range with a peak at ~14 km s/s
blue-shifted from the systemic velocity. The SiO emission is brightest at the
B1 position, which corresponds to the apex of the U-shaped structure. There are
two compact SiO clumps along the faint arc-like feature to the east of the
U-shaped structure. At the B1 position, there are two velocity components; one
is a compact clump with a size of ~1500 AU seen in the high-velocity and the
other is an extended component with lower velocities. The kinematic structure
at the B1 position is different from that expected in a single bow shock. It is
likely that the high-velocity SiO clump at the B1 position is kinetically
independent from the low-velocity gas. The line ratio between SiO (5--4) and
SiO (2--1) suggests that the high velocity SiO clumps consist of high density
gas of n ~ 10^5 - 10^6 cm^-3, which is comparable to the density of the bullets
in the extremely high velocity (EHV) jets. It is likely that the high-velocity
SiO clumps in L1157 have the same origin as the EHV bullets.


title: Finite group actions on Kan complexes

abstract:
  We study simplicial action of groups on one vertex Kan complexes. We show
that every semi-direct product of the fundamental group of an one vertex Kan
complex with a finite group can be simplicially realized. We also calculate the
cohomology of the fixed point set of a finite $p-$group action on an one vertex
aspherical Kan complex.


title: On real chains of evolution algebras

abstract:
  In this paper we define a chain of $n$-dimensional evolution algebras
corresponding to a permutation of $n$ numbers. We show that a chain of
evolution algebras (CEA) corresponding to a permutation is trivial (consisting
only algebras with zero-multiplication) iff the permutation has not a fixed
point. We show that a CEA is a chain of nilpotent algebras (independently on
time) iff it is trivial. We construct a wide class of chains of 3-dimensional
EAs and a class of symmetric $n$-dimensional CEAs. A construction of arbitrary
dimensional CEAs is given. Moreover, for a chain of 3-dimensional EAs we study
the behavior of the baric property, the behavior of the set of absolute
nilpotent elements and dynamics of the set of idempotent elements depending on
the time.


title:
The Limits of Phenomenology: From Behaviorism to Drug Testing and
  Engineering Design

abstract:
  It is widely believed that theory is useful in physics because it describes
simple systems and that strictly empirical phenomenological approaches are
necessary for complex biological and social systems. Here we prove based upon
an analysis of the information that can be obtained from experimental
observations that theory is even more essential in the understanding of complex
systems. Implications of this proof revise the general understanding of how we
can understand complex systems including the behaviorist approach to human
behavior, problems with testing engineered systems, and medical experimentation
for evaluating treatments and the FDA approval of medications. Each of these
approaches are inherently limited in their ability to characterize real world
systems due to the large number of conditions that can affect their behavior.
Models are necessary as they can help to characterize behavior without
requiring observations for all possible conditions. The testing of models by
empirical observations enhances the utility of those observations. For systems
for which adequate models have not been developed, or are not practical, the
limitations of empirical testing lead to uncertainty in our knowledge and risks
in individual, organizational and social policy decisions. These risks should
be recognized and inform our decisions.


title: Inclination effects in T Tauri star spectra

abstract:
  CONTEXT. Because of the presence of rotation and accretion disks, classical T
Tauri stars have symmetry planes that are normally inclined relative to the
plane of the sky. The inclination angles affect the observed spectral
properties of these objects. AIMS. We study the influence of the inclination
angles on classical T Tauri star spectra in an empirical manner. METHODS.
Published inclination angles, derived from the stellar photospheric rotation or
from spatially resolved circumstellar disk observations, are compared with
various observed spectral properties, and correlations are established and
investigated. RESULTS. Inclinations derived from the stellar rotation are found
to be much less accurate than the published disk inclinations, and no
significant correlations between spectral properties and inclinations based on
rotation data could be detected. In contrast, significant correlations are
found between the disk inclination angles and the apparent velocities observed
for the forbidden emission lines and the wind absorption features of permitted
lines. These data support the assumption of cone-like polar winds with opening
angles smaller than $\approx 45^\circ$. Other spectral features show weaker or
no inclination dependence. Using these results, the true (deprojected) flow
velocities of the polar winds are derived for the investigated sample of T
Tauri stars. Deprojected wind-ejection velocities appear to differ by a factor
of two among the stars in our sample, which spans a range of mass-loss rates
from $10^{-10} $M$_\odot$/yr to $3 \times 10^{-7} $M$_\odot$/yr.


title: A quantum information processor with trapped ions

abstract:
  Quantum computers hold the promise to solve certain problems exponentially
faster than their classical counterparts. Trapped atomic ions are among the
physical systems in which building such a computing device seems viable. In
this work we present a small-scale quantum information processor based on a
string of $^{40}$Ca${^+}$ ions confined in a macroscopic linear Paul trap. We
review our set of operations which includes non-coherent operations allowing us
to realize arbitrary Markovian processes. In order to build a larger quantum
information processor it is mandatory to reduce the error rate of the available
operations which is only possible if the physics of the noise processes is well
understood. We identify the dominant noise sources in our system and discuss
their effects on different algorithms. Finally we demonstrate how our entire
set of operations can be used to facilitate the implementation of algorithms by
examples of the quantum Fourier transform and the quantum order finding
algorithm.


title:
Nonstandard limit theorems and large deviations for the Jacobi beta
  ensemble

abstract:
  In this paper we show weak convergence of the empirical eigenvalue
distribution and of the weighted spectral measure of the Jacobi ensemble, when
one or both parameters grow faster than the dimension $n$. In these cases the
limit measure is given by the Marchenko-Pastur law and the semicircle law,
respectively. For the weighted spectral measure we also prove large deviation
principles under this scaling, where the rate functions are those of the other
classical ensembles.


title: Evidence of entanglement, or: Is Schr\"{o}dinger's cat really entangled?

abstract:
  Quantum effects and, in particular, entanglement are by now widely recognized
in all areas of physics and related fields. However, we feel that the precise
notion of entanglement---though mathematically well-defined---still generates
confusion even in the academic environment. Our aim in this article is to point
out and clarify some aspects of the notion of entanglement, in particular with
respect to observable quantities. We do this by illustrating common
misconceptions with Schr\"{o}dinger's cat paradox, explain them in mathematical
terms and provide examples where misunderstandings arise and how they can be
solved.


title:
On the number of Dedekind cuts and two-cardinal models of dependent
  theories

abstract:
  For an infinite cardinal $\kappa$, let $ded\kappa$ denote the supremum of the
number of Dedekind cuts in linear orders of size $\kappa$. It is known that
$\kappa<ded\kappa\leq 2^{\kappa}$ for all $\kappa$ and that
$ded\kappa<2^{\kappa}$ is consistent for any $\kappa$ of uncountable
cofinality. We prove however that $2^{\kappa}\leq ded ( ded ( ded (
ded\kappa)))$ always holds. Using this result we calculate the Hanf numbers for
the existence of two-cardinal models with arbitrarily large gaps and for the
existence of arbitrarily large models omitting a type in the class of countable
dependent first-order theories. Specifically, we show that these bounds are as
large as in the class of all countable theories.


title:
Neutrino Radiation Showing a Christodoulou Memory Effect in General
  Relativity

abstract:
  We describe neutrino radiation in general relativity by introducing the
energy-momentum tensor of a null fluid into the Einstein equations.
Investigating the geometry and analysis at null infinity, we prove that a
component of the null fluid enlarges the Christodoulou memory effect of
gravitational waves. The description of neutrinos in general relativity as a
null fluid can be regarded as a limiting case of a more general description
using the massless limit of the Einstein-Vlasov system. The present authors
with co-authors have work in progress to generalize the results of this paper
using this more general description. Gigantic neutrino bursts occur in our
universe in core-collapse supernovae and in the mergers of neutron star
binaries.


title:
Compact Relaxations for MAP Inference in Pairwise MRFs with Piecewise
  Linear Priors

abstract:
  Label assignment problems with large state spaces are important tasks
especially in computer vision. Often the pairwise interaction (or smoothness
prior) between labels assigned at adjacent nodes (or pixels) can be described
as a function of the label difference. Exact inference in such labeling tasks
is still difficult, and therefore approximate inference methods based on a
linear programming (LP) relaxation are commonly used in practice. In this work
we study how compact linear programs can be constructed for general piecwise
linear smoothness priors. The number of unknowns is O(LK) per pairwise clique
in terms of the state space size $L$ and the number of linear segments K. This
compares to an O(L^2) size complexity of the standard LP relaxation if the
piecewise linear structure is ignored. Our compact construction and the
standard LP relaxation are equivalent and lead to the same (approximate) label
assignment.


title:
Dynamical decoupling noise spectroscopy at an optimal working point of a
  qubit

abstract:
  I present a theory of environmental noise spectroscopy via dynamical
decoupling of a qubit at an optimal working point. Considering a sequence of
$n$ pulses and pure dephasing due to quadratic coupling to Gaussian distributed
noise $\xi(t)$, I use the linked-cluster (cumulant) expansion to calculate the
coherence decay. Solutions allowing for reconstruction of spectral density of
noise are given. For noise with correlation time shorter than the timescale on
which coherence decays, the noise filtered by the dynamical decoupling
procedure can be treated as effectively Gaussian at large $n$, and
well-established methods of noise spectroscopy can be used to reconstruct the
spectrum of $\xi^{2}(t)$ noise. On the other hand, for noise of dominant
low-frequency character ($1/f^{\beta}$ noise with $\beta \! > \! 1$), an
infinite-order resummation of the cumulant expansion is necessary, and it leads
to an analytical formula for coherence decay having a power-law tail at long
times. In this case, the coherence at time $t$ depends both on spectral density
of $\xi(t)$ noise at $\omega \! = \! n\pi/t$, and on the effective
low-frequency cutoff of the noise spectrum, which is typically given by the
inverse of the data acquisition time. Simulations of decoherence due to purely
transverse noise show that the analytical formulas derived in this paper apply
in this often encountered case of an optimal working point, provided that the
number of pulses is not very large, and the longitudinal qubit splitting is
much larger than the transverse noise amplitude.


title:
StochDecomp - Matlab package for noise decomposition in stochastic
  biochemical systems

abstract:
  Stochasticity is an indispensable aspect of biochemical processes at the
cellular level. Studies on how the noise enters and propagates in biochemical
systems provided us with nontrivial insights into the origins of stochasticity,
in total however they constitute a patchwork of different theoretical analyses.
Here we present a flexible and generally applicable noise decomposition tool,
that allows us to calculate contributions of individual reactions to the total
variability of a system's output. With the package it is therefore possible to
quantify how the noise enters and propagates in biochemical systems. We also
demonstrate and exemplify using the JAK-STAT signalling pathway that it is
possible to infer noise contributions resulting from individual reactions
directly from experimental data. This is the first computational tool that
allows to decompose noise into contributions resulting from individual
reactions.


title:
Origin of similarity of phase diagrams in amphiphilic and colloidal
  systems with competing interactions

abstract:
  We show that amphiphilic and colloidal systems with competing interactions
can be described by the same Landau-Brazovskii functional. The functional is
obtained by a systematic coarse-graining procedure applied tosystems with
isotropic interaction potentials. Microscopic expressions for the coefficients
in the functional are derived. We propose simple criteria to distinguish the
effective interparticle potentials that can lead to macro- or microsegregation.
Our considerations concern also charged globular proteins in aqueous solutions
and other system with effective short-range attraction long-range repulsion
interactions.


title:
The unique electronic structure of Ca10(Pt4As8)(Fe2-xPtxAs2)5 with
  metallic Pt4As8 layers

abstract:
  We studied the low-lying electronic structure of the newly discovered
iron-platinum-arsenide superconductor, Ca10(Pt4As8)(Fe2-xPtxAs2)5 (Tc=22 K)
with angle-resolved photoemission spectroscopy. We found that the Pt4As8 layer
contributes to a small electron-like Fermi surface, indicative of metallic
charge reservoir layers that are rare for iron based superconductors. Moreover,
the electronic structure of the FeAs-layers resembles those of other prototype
iron pnictides to a large extent. However, there is only dxy-orbital originated
hole-like Fermi surface near the zone center, which is rather unique for an
iron pnictide superconductor with relatively high superconducting transition
temperature; and the dxz and dyz originated bands are not degenerate at the
zone center. Furthermore, all bands near the Fermi energy show negligible kz
dependence, indicating the strong two-dimensional nature of this material. Our
results indicate this material possesses rather unique electronic structure,
which enriches our current knowledge of iron based superconductors.


title: System and Methods for Converting Speech to SQL

abstract:
  This paper concerns with the conversion of a Spoken English Language Query
into SQL for retrieving data from RDBMS. A User submits a query as speech
signal through the user interface and gets the result of the query in the text
format. We have developed the acoustic and language models using which a speech
utterance can be converted into English text query and thus natural language
processing techniques can be applied on this English text query to generate an
equivalent SQL query. For conversion of speech into English text HTK and Julius
tools have been used and for conversion of English text query into SQL query we
have implemented a System which uses rule based translation to translate
English Language Query into SQL Query. The translation uses lexical analyzer,
parser and syntax directed translation techniques like in compilers. JFLex and
BYACC tools have been used to build lexical analyzer and parser respectively.
System is domain independent i.e. system can run on different database as it
generates lex files from the underlying database.


title:
Electrons and holes in planar systems and condensation by scattering of
  electrons-holes pairs in high-TC materials

abstract:
  Quantum field-theory is developed for treating electrons and holes in planar
systems. Non-unitary representations of Dirac equation in the plane are
developed. These equations can be used for treating holes-electron pairing in
high TC materials where in a non-relativistic approximation we have a
relatively small energy band gap. It is shown that while holes or electrons
satisfy separately Pauli-exclusion principle, with anti-commutation relations,
the holes-electron pairs follow boson commutation relations. The distribution
for electrons-holes pairs in planar systems is calculated for the case in which
scattering effects between different pairs can be neglected. It is shown that
for high surface density in which many pairs are included in an area with wave
length dimension, Bose-Einstein condensation can occur. The ground state of the
Bose condensation is calculated and the calculations are compared with those of
the BCS theory. The physical implications to high TC currents in planar systems
are discussed. The present model is related to the chemistry of high-TC
materials. PACS: 03.65.


title: On Lattices over Valuation Rings of Arbitrary Rank

abstract:
  We show how several results about p-adic lattices generalize easily to
lattices over valuation ring of arbitrary rank having only the Henselian
property for quadratic polynomial. If 2 is invertible we obtain the uniqueness
of the Jordan decomposition and the Witt Cancelation Theorem. We show that the
isomorphism classes of indecomposable rank 2 lattices over such a ring in which
2 is not invertible are characterized by two invariants, provided that the
lattices contain a primitive norm divisible by 2 of maximal valuation.


title:
Thermal Properties of a Particle Confined to a Parabolic Quantum Well in
  2D Space with Conical Disclination

abstract:
  The thermal properties of a system, comprising of a spinless non-interacting
charged particle in the presence of a constant external magnetic field and
confined in a parabolic quantum well are studied. The focus has been on the
effects of a topological defect, of the form of conical disclination, with
regard to the thermodynamic properties of the system. We have obtained the
modifications to the traditional Landau-Fock-Darwin spectrum in the presence of
conical disclination. The effect of the conical kink on the degeneracy
structure of the energy levels is investigated. The canonical formalism is used
to compute various thermodynamic variables. The study shows an interplay
between magnetic field, temperature and the degree of conicity by setting two
scales for temperature corresponding to the frequency of the confining
potential and the cyclotron frequency of external magnetic field. The kink
parameter is found to affect the quantitative behaviour of the thermodynamic
quantities. It plays a crucial role in the competition between the external
magnetic field and temperature in fixing the values of the thermal response
functions. This study provides an important motivation for studying similar
systems, however with non trivial interactions in the presence of topological
defects.

categories: cond-mat.mes-hall cond-mat.other cond-mat.stat-mech quant-ph


title:
Calculating the electromagnetic characteristics of bifacial optical
  nanomaterials

abstract:
  We introduce a formalism that describes the interaction of light with
bifacial optical nanomaterials. They are artificial noncentrosymmetric
materials in which counter-propagating waves behave differently. We derive
electromagnetic material parameters for uniaxial crystalline media in terms of
the complex transmission and reflection coefficients of a single layer of the
constituent nanoscatterers, which makes the numerical evaluation of these
parameters very efficient. In addition, we present generalized Fresnel
coefficients for such bifacial nanomaterials and investigate the fundamental
role of higher-order electromagnetic multipoles on the bifaciality. We find
that two counter-propagating waves in the material must experience the same
refractive index, but they can have dramatically different wave impedances. The
use of our model in practice is demonstrated with a particular example of a
bifacial nanomaterial that exhibits a directional impedance matching to the
surrounding medium.


title:
Weak localization and Raman study of anisotropically etched graphene
  antidots

abstract:
  We study a crystallographic etching process of graphene nanostructures where
zigzag edges can be prepared selectively. The process involves heating
exfoliated single-layer graphene samples with a predefined pattern of antidot
arrays in an argon atmosphere at 820 C, which selectively removes carbon atoms
located on armchair sites. Atomic force microscopy and scanning electron
microscopy cannot resolve the structure on the atomic scale. However, weak
localization and Raman measurements - which both probe intervalley scattering
at armchair edges - indicate that zigzag regions are enhanced compared to
samples prepared with oxygen based reactive ion etching only.


title: Nonlinearity measures of random Boolean functions

abstract:
  The r-th order nonlinearity of a Boolean function is the minimum number of
elements that have to be changed in its truth table to arrive at a Boolean
function of degree at most r. It is shown that the (suitably normalised) r-th
order nonlinearity of a random Boolean function converges strongly for all r\ge
1. This extends results by Rodier for r=1 and by Dib for r=2. The methods in
the present paper are mostly of elementary combinatorial nature and also lead
to simpler proofs in the cases that r=1 or 2.


title:
Pseudorandomness in 0's and 2's distribution in the iterated absolute
  differences of primes

abstract:
  Be d_{m,n} a generic element in the infinite matrix D, with d_{1, n} defined
as the n-th prime number and, for any m>1, d_{m, n} = | d_{m-1, n} - d_{m-1,
n+1} | When n>1, after the first few terms the columns in the matrix appear to
be constituted entirely by 0s and 2s. Here is reported a computation over about
4.55x10^8 elements of D, which suggests a pseudo-random distribution of these
two values.


title:
On the sympatric evolution and evolutionary stability of coexistence by
  relative nonlinearity of competition

abstract:
  If two species exhibit different nonlinear responses to a single shared
resource, and if each species modifies the resource dynamics such that this
favors its competitor, they may stably coexist. This coexistence mechanism,
known as relative nonlinearity of competition, is well understood
theoretically, but less is known about its evolutionary properties and its
prevalence in real communities. We address this challenge by using adaptive
dynamics theory and individual-based simulations to compare community
stabilization and evolutionary stability of species that coexist by relative
nonlinearity. In our analysis, evolution operates on the species'
density-compensation strategies, and we consider a trade-off between population
growth rates at high and low resource availability. We confirm previous
findings that, irrespective of the particular model of density dependence,
there are many combinations of overcompensating and undercompensating
density-compensation strategies that allow stable coexistence by relative
nonlinearity. However, our analysis also shows that most of these strategy
combinations are not evolutionarily stable and will be outcompeted by an
intermediate density-compensation strategy. Only very specific trade-offs lead
to evolutionarily stable coexistence by relative nonlinearity. As we find no
reason why these particular trade-offs should be common in nature, we conclude
that the sympatric evolution and evolutionary stability of relative
nonlinearity, while possible in principle, seems rather unlikely. We speculate
that this may, at least in part, explain why empirical demonstrations of this
coexistence mechanism are rare, noting, however, that the difficulty to detect
relative nonlinearity in the field [...]


title:
Positive radial solutions for coupled Schr\"{o}dinger system with
  critical exponent in $\R^N\,(N\geq5)$

abstract:
  We study the following coupled Schr\"odinger system \ds -\Delta
u+u=u^{2^*-1}+\be u^{\frac{2^*}{2}-1}v^{\frac{2^*}{2}}+\la_1u^{\al-1}, &x\in
\R^N, \ds -\Delta v+v=v^{2^*-1}+\be
u^{\frac{2^*}{2}}v^{\frac{2^*}{2}-1}+\la_2v^{r-1}, &x\in \R^N, u,v > 0, &x\in
\R^N, where $N\geq 5, \la_1,\la_2>0,\be\neq 0, 2<\al,r<2^*,2^*\triangleq
\frac{2N}{N-2}.$ Note that the nonlinearity and the coupling terms are both
critical. Using the Mountain Pass Theorem, Ekeland's variational principle and
Nehari mainfold, we show that this critical system has a positive radial
solution for positive $\be$ and some negative $\be$ respectively.


title:
Evolution of transverse-distance dependent parton densities at
  large-$x_B$ and geometry of the loop space

abstract:
  We discuss possible applications of the equations of motion in the
generalized Wilson loop space to the phenomenology of the three-dimensional
parton distribution functions in the large-$x_B$ approximation. This regime is
relevant for future experimental programs to be launched at the (approved)
Jefferson Lab 12 GeV upgrade and the (planned) Electron-Ion Collider. We show
that the geometrical evolution of the Wilson loops corresponds to the combined
rapidity and renormalization-group equation of the transverse-distance
dependent parton densities in the large-$x_B$ factorization scheme.


title: Dual-Path Methods for Propagating Quantum Microwaves

abstract:
  We study quantum state tomography, entanglement detection, and channel noise
reconstruction of propagating quantum microwaves via dual-path methods. The
presented schemes make use of the following key elements: propagation channels,
beam splitters, linear amplifiers, and field quadrature detectors. Remarkably,
our methods are tolerant to the ubiquitous noise added to the signals by
phase-insensitive microwave amplifiers. Furthermore, we analyze our techniques
with numerical examples and experimental data, and compare them with the scheme
developed in Eichler $et$ $al$ (2011 Phys. Rev. Lett. 106 220503; 2011 Phys.
Rev. Lett. 107 113601), based on a single path. Our methods provide key toolbox
components that may pave the way towards quantum microwave teleportation and
communication protocols.


title:
Static and dynamic dipole polarizability of cylindrically confined
  hydrogen atom

abstract:
  The non-relativistic static and dynamic dipole polarizabilities of hydrogen
atom experiencing a cylindrical confinement are investigated. Two methods based
on B-Splines are used for the computations of the energies and wavefunctions.
The first method is a variational based method while the second one proceeds by
a fit of the non-separable Coulomb potential in the product form. The computed
energies compare very well with previous computations. They converge, as well
as the dipole polarizability, to the exact unconfined free atom values. The fit
approach is found to be advantageous, as it helps saving the computational time
without a loss of accuracy. Dynamic polarizabilities have been reported for
various dimensions of the confining cylinder.


title: Multipath TCP: Analysis, Design and Implementation

abstract:
  Multi-path TCP (MP-TCP) has the potential to greatly improve application
performance by using multiple paths transparently. We propose a fluid model for
a large class of MP-TCP algorithms and identify design criteria that guarantee
the existence, uniqueness, and stability of system equilibrium. We clarify how
algorithm parameters impact TCP-friendliness, responsiveness, and window
oscillation and demonstrate an inevitable tradeoff among these properties. We
discuss the implications of these properties on the behavior of existing
algorithms and motivate a new design that generalizes existing algorithms and
strikes a good balance among TCP-friendliness, responsiveness, and window
oscillation. We have implemented our algorithm in the Linux kernel. We use our
prototype to compare the new algorithm with existing MP-TCP algorithms.


title: The Effective Temperatures of O-type Stars from UV spectroscopy

abstract:
  We present an analysis of high resolution spectra in the far-UV -- UV range
(~905-2000\AA) with non-LTE, spherical, hydrodynamical, line-blanketed models,
of three O-type Galactic stars, and derive their photospheric and wind
parameters. These data extend previously analyzed samples and fill a gap in
spectral type coverage. The combined sample confirms a revised (downward)
effective temperature scale with respect to canonical calibrations, as found in
our previous works from UV and optical spectra, and in recent works by other
authors.


title:
Proposed Entanglement of X-ray Nuclear Polaritons as a Potential Method
  for Probing Matter at the Subatomic Scale

abstract:
  A setup for generating the special superposition of a simultaneously forward-
and backward-propagating collective excitation in a nuclear sample is studied.
We show that by actively manipulating the scattering channels of single x-ray
quanta with the help of a normal incidence x-ray mirror, a nuclear polariton
which propagates in two opposite directions can be generated. The two
counterpropagating polariton branches are entangled by a single x-ray photon.
The quantum nature of the nuclear excitation entanglement gives rise to a
subangstrom-wavelength standing wave excitation pattern that can be used as a
flexible tool to probe matter dynamically on the subatomic scale.


title:
SIGGMA: A Survey of Ionized Gas in the Galaxy, Made with the Arecibo
  Telescope

abstract:
  A Survey of Ionized Gas in the Galaxy, made with the Arecibo telescope
(SIGGMA) uses the Arecibo L-band Feed Array (ALFA) to fully sample the Galactic
plane (30 < l < 75 and -2 < b < 2; 175 < l < 207 and -2 < b < 1) observable
with the telescope in radio recombination lines (RRLs). Processed data sets are
being produced in the form of data cubes of 2 degree (along l) x 4 degree
(along b) x 151 (number of channels), archived and made public. The 151
channels cover a velocity range of 600 km/s and the velocity resolution of the
survey changes from 4.2 km/s to 5.1 km/s from the lowest frequency channel to
the highest frequency channel, respectively.RRL maps with 3.4 arcmin resolution
and line flux density sensitivity of 0.5 mJy will enable us to identify new HII
regions, measure their electron temperatures, study the physics of
photodissociation regions (PDRs) with carbon RRLs, and investigate the origin
of the extended low density medium (ELDM). Twelve Hn{\alpha} lines fall within
the 300 MHz bandpass of ALFA; they are resampled to a common velocity
resolution to improve the signal-to-noise ratio (SN) by a factor of 3 or more
and preserve the line width. SIGGMA will produce the most sensitive fully
sampled RRL survey to date. Here we discuss the observing and data reduction
techniques in detail. A test observation toward the HII region complex
S255/S257 has detected Hn{\alpha} and Cn{\alpha} lines with SN>10.


title: First experiences with the Intel MIC architecture at LRZ

abstract:
  With the rapidly growing demand for computing power new accelerator based
architectures have entered the world of high performance computing since around
5 years. In particular GPGPUs have recently become very popular, however
programming GPGPUs using programming languages like CUDA or OpenCL is
cumbersome and error-prone. Trying to overcome these difficulties, Intel
developed their own Many Integrated Core (MIC) architecture which can be
programmed using standard parallel programming techniques like OpenMP and MPI.
In the beginning of 2013, the first production-level cards named Intel Xeon Phi
came on the market. LRZ has been considered by Intel as a leading research
centre for evaluating coprocessors based on the MIC architecture since 2010
under strict NDA. Since the Intel Xeon Phi is now generally available, we can
share our experience on programming Intel's new MIC architecture.


title: The q-PushASEP: A New Integrable Model for Traffic in 1+1 Dimension

abstract:
  We introduce a new interacting (stochastic) particle system q-PushASEP which
interpolates between the q-TASEP introduced by Borodin and Corwin (see
arXiv:1111.4408, and also arXiv:1207.5035; arXiv:1305.2972; arXiv:1212.6716)
and the q-PushTASEP introduced recently by Borodin and Petrov
(arXiv:1305.5501). In the q-PushASEP, particles can jump to the left or to the
right, and there is a certain partially asymmetric pushing mechanism present.
This particle system has a nice interpretation as a model of traffic on a
one-lane highway in which cars are able to accelerate or slow down.
  Using the quantum many body system approach, we explicitly compute the
expectations of a large family of observables for this system in terms of
nested contour integrals. We also discuss relevant Fredholm determinantal
formulas for the distribution of the location of each particle, and connections
of the model with a certain two-sided version of Macdonald processes and with
the semi-discrete stochastic heat equation.

categories: math.PR cond-mat.stat-mech math-ph math.MP


title: Subrecoil cavity cooling towards degeneracy: A numerical study

abstract:
  We present a detailed numerical analysis of the temperature limit and
timescale of cavity cooling of a dilute gas in the quantum regime for particles
and light. For a cavity with a linewidth smaller than the recoil frequency
efficient cooling towards quantum degeneracy is facilitated by applying a
tailored sequence of laser pulses transferring the particles towards lower
momenta. Two-particle Monte Carlo wave function simulations reveal strongly
improved cooling properties for a ring versus a standing-wave geometry.
Distinct quantum correlations and cooling limits for bosons and fermions
demonstrate quantum statistical effects. In particular, in ring cavities the
photon-mediated long-range interaction favours momentum-space pairing of
bosons, while fermion pairs exhibit anti-correlated or uncorrelated momenta.
The results are consistent with recent experiments and give encouraging
prospects to achieve sufficient conditions for the condensation of a wide class
of polarisable particles via cavity cooling.


title: Heralded entanglement of two ions in an optical cavity

abstract:
  We demonstrate precise control of the coupling of each of two trapped ions to
the mode of an optical resonator. When both ions are coupled with near-maximum
strength, we generate ion--ion entanglement heralded by the detection of two
orthogonally polarized cavity photons. The entanglement fidelity with respect
to the Bell state $\Psi^+$ reaches $F \geq (91.9\pm2.5)%$. This result
represents an important step toward distributed quantum computing with cavities
linking remote atom-based registers.


title:
Performance Analysis of Connection Admission Control Scheme in IEEE
  802.16 OFDMA Networks

abstract:
  IEEE 802.16 OFDMA (Orthogonal Frequency Division Multiple Access) technology
has emerged as a promising technology for broadband access in a Wireless
Metropolitan Area Network (WMAN) environment. In this paper, we address the
problem of queueing theoretic performance modeling and analysis of OFDMA under
broad-band wireless networks. We consider a single-cell IEEE 802.16 environment
in which the base station allocates subchannels to the subscriber stations in
its coverage area. The subchannels allocated to a subscriber station are shared
by multiple connections at that subscriber station. To ensure the Quality of
Service (QoS) performances, a Connection Admission Control (CAC) scheme is
considered at a subscriber station. A queueing analytical framework for these
admission control schemes is presented considering OFDMA-based transmission at
the physical layer. Then, based on the queueing model, both the
connection-level and the packet-level performances are studied and compared
with their analogues in the case without CAC. The connection arrival is modeled
by a Poisson process and the packet arrival for a connection by a two-state
Markov Modulated Poisson Process (MMPP). We determine analytically and
numerically different performance parameters, such as connection blocking
probability, average number of ongoing connections, average queue length,
packet dropping probability, queue throughput and average packet delay.


title:
Insulating state and giant non-local response in an InAs/GaSb quantum
  well in the quantum Hall regime

abstract:
  We present transport measurements performed in InAs/GaSb double quantum
wells. At the electron-hole crossover tuned by a gate voltage, a strong
increase in the longitudinal resistivity is observed with increasing
perpendicular magnetic field. Concomitantly with a local resistance exceeding
the resistance quantum by an order of magnitude, we find a pronounced non-local
resistance signal of almost similar magnitude. The co-existence of these two
effects is reconciled in a model of counter-propagating and dissipative quantum
Hall edge channels providing backscattering, shorted by a residual bulk
conductivity.


title:
The simultaneous occurrence of superparamagnetism and superconductivity
  in nominal single crystalline (Ca1-xPrx)Fe2As2 with 0 <= x <= 0.13

abstract:
  The observation of non-bulk superconductivity with an unexpectedly high onset
transition temperature Tc up to ~ 49 K in non-superconducting single
crystalline CaFe2As2 upon rare-earth doping has raised interesting questions
concerning its origin. Several possibilities including interfacial mechanism
have been proposed to account for the unusual observation. In an attempt to
differentiate such propositions, we have carried out a systematic compositional
and magnetic study on single crystals of nominal (Ca1-xPrx)Fe2As2 with 0 <= x
<= 0.13 throughout the solubility range of Pr, which covers both the
non-superconducting and superconducting regions. We found the unusual
simultaneous occurrence of superparamagnetism and superconductivity with an
x-independent Tc and a close correlation of the superconducting volume fraction
with the magnetic cluster density and As-defect density. The finding
demonstrates a close relationship among superconductivity, superparamagnetism,
and defects, consistent with the previously proposed interface-mechanism, and
offers a possible future path to higher Tc.


title: Instantaneous Bethe-Salpeter Approach to Pseudoscalar Mesons

abstract:
  Light pseudoscalar mesons are Janus-type particles: Within quantum
chromodynamics, they must be described as bound states of its fundamental
degrees of freedom and as the (pseudo-) Goldstone bosons of its spontaneously
broken chiral symmetry. This janiform nature of pions and kaons may be easily
accommodated by the Bethe-Salpeter formalism in its instantaneous limit:
Starting from the general behaviour of the Bethe-Salpeter solutions for light
pseudoscalar mesons at large Euclidean momenta, we provide the exact
relationship between the solutions of our bound-state equation and the
underlying interactions, boiled down to a configuration-space potential
depending on the interquark distance: the potential exhibits a logarithmically
softened Coulomb singularity at the origin and, at large interquark distances,
rises beyond bounds for massless quarks but approaches a non-positive finite
limit for too heavy quarks.


title:
Emergence of skyrmion lattices and bimerons in diluted chiral magnetic
  thin films

abstract:
  Skyrmions are topologically protected field configurations with particle-like
properties that play important roles in various fields of science. Recently,
skyrmions have been directly observed in chiral magnets. Here, we investigate
the effects of nonmagnetic impurities (structural point-like defects) on the
different initial states (random or helical states) and on the formation of the
skyrmion crystal in a discrete lattice. By using first-principle calculations
and Monte Carlo techniques, we have shown that even a small percentage of spin
vacancies present in the chiral magnetic thin film affects considerably the
skyrmion order. The main effects of impurities are somewhat similar to thermal
effects. The presence of these spin vacancies also induces the formation of
compact merons (bimerons) in both the helical and skyrmion states. We have also
investigated the effects of adjacent impurities producing only one hole (with
an almost circular shape) intentionally inserted into the plate (forming a
non-simply connected manifold) on the skyrmion crystal.


title:
A Schwarzschild model of the Galactic bar with initial density from
  N-body simulations

abstract:
  Using the potential from N-body simulations, we construct the Galactic bar
models with the Schwarzschild method. By varying the pattern speed and the
position angle of the bar, we find that the best-fit bar model has pattern
speed $\Omega_{\rm p}=40\ \rm{km\ s^{-1}\ kpc^{-1}}$, and bar angle
$\theta_{\rm bar}=45^{\circ}$. $N$-body simulations show that the best-fit
model is stable for more than 1.5 Gyrs. Combined with the results in Wang et
al. (2012), we find that the bar angle and/or the pattern speed are not well
constrained by BRAVA data in our Schwarzschild models. The proper motions
predicted from our model are slightly larger than those observed in four
fields. In the future, more kinematic data from the ground and space-based
observations will enable us to refine our model of the Milky Way bar.


title: Intersections of multiplicative translates of 3-adic Cantor sets

abstract:
  Motivated by a question of Erd\H{o}s, this paper considers questions
concerning the discrete dynamical system on the 3-adic integers given by
multiplication by 2. Let the 3-adic Cantor set consist of all 3-adic integers
whose expansions use only the digits 0 and 1. The exception set is the set of
3-adic integers whose forward orbits under this action intersects the 3-adic
Cantor set infinitely many times. It has been shown that this set has Hausdorff
dimension 0. Approaches to upper bounds on the Hausdorff dimensions of these
sets leads to study of intersections of multiplicative translates of Cantor
sets by powers of 2. More generally, this paper studies the structure of finite
intersections of general multiplicative translates of the 3-adic Cantor set by
integers 1 < M_1 < M_2 < ...< M_n. These sets are describable as sets of 3-adic
integers whose 3-adic expansions have one-sided symbolic dynamics given by a
finite automaton. As a consequence, the Hausdorff dimension of such a set is
always of the form log(\beta) for an algebraic integer \beta. This paper gives
a method to determine the automaton for given data (M_1, ..., M_n).
Experimental results indicate that the Hausdorff dimension of such sets depends
in a very complicated way on the integers M_1,...,M_n.


title:
Calculating Hyperfine Couplings in Large Ionic Crystals Containing
  Hundreds of QM Atoms: Subsystem DFT is the Key

abstract:
  We present an application of the linear scaling Frozen Density Embedding
(FDE) formulation of subsystem DFT to the calculation of isotropic hyperfine
coupling constants (hfccs) of atoms belonging to a guanine radical cation
embedded in a guanine hydrochloride monohydrate crystal. The model systems
considered range from an isolated guanine to a 15,000 atom QM/MM cluster where
the QM region is comprised of 36 protonated guanine cations, 36 chlorine anions
and 42 water molecules. Our calculations show that the embedding effects of the
surrounding crystal cannot be reproduced neither by small model systems nor by
a pure QM/MM procedure. Instead, a large QM region is needed to fully capture
the complicated nature of the embedding effects in this system. The
unprecedented system size for a relativistic all-electron isotropic hfccs
calculation can be approached in this work because the local nature of the
electronic structure of the organic crystals considered is fully captured by
the FDE approach.


title:
Schottky mass measurements of heavy neutron-rich nuclides in the element
  range $70\leZ \le79$ at the ESR

abstract:
  Storage-ring mass spectrometry was applied to neutron-rich $^{197}$Au
projectile fragments. Masses of $^{181,183}$Lu, $^{185,186}$Hf, $^{187,188}$Ta,
$^{191}$W, and $^{192,193}$Re nuclei were measured for the first time. The
uncertainty of previously known masses of $^{189,190}$W and $^{195}$Os nuclei
was improved. Observed irregularities on the smooth two-neutron separation
energies for Hf and W isotopes are linked to the collectivity phenomena in the
corresponding nuclei.


title: Toward the Coevolution of Novel Vertical-Axis Wind Turbines

abstract:
  The production of renewable and sustainable energy is one of the most
important challenges currently facing mankind. Wind has made an increasing
contribution to the world's energy supply mix, but still remains a long way
from reaching its full potential. In this paper, we investigate the use of
artificial evolution to design vertical-axis wind turbine prototypes that are
physically instantiated and evaluated under fan generated wind conditions.
Initially a conventional evolutionary algorithm is used to explore the design
space of a single wind turbine and later a cooperative coevolutionary algorithm
is used to explore the design space of an array of wind turbines. Artificial
neural networks are used throughout as surrogate models to assist learning and
found to reduce the number of fabrications required to reach a higher
aerodynamic efficiency. Unlike in other approaches, such as computational fluid
dynamics simulations, no mathematical formulations are used and no model
assumptions are made.


title:
Pion transverse momentum spectrum, elliptic flow and interferometry in
  the granular source model for RHIC and LHC heavy ion collisions

abstract:
  We systematically investigate the pion transverse momentum spectrum, elliptic
flow, and Hanbury-Brown-Twiss (HBT) interferometry in the granular source model
for the heavy ion collisions of Au-Au at $\sqrt{s_{NN}}=$ 200 GeV and Pb-Pb at
$\sqrt{s_{NN}}=$ 2.76 TeV with different centralities. The granular source
model can well reproduce the experimental results of the heavy ion collisions
at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider
(LHC). We examine the parameters involved in the granular source model. The
experimental data of the momentum spectrum, elliptic flow, and HBT radii for
the two collision energies and different centralities impose very strict
constraints on the model parameters. They exhibit certain regularities for
collision centrality and energy. The space-time structure and expansion
velocities of the granular sources for the heavy ion collisions at the RHIC and
LHC energies with different centralities are investigated.


title:
`Spectro-temporal' characteristics and disk-jet connection of the
  outbursting black hole source XTE J1859+226

abstract:
  We re-investigated the `spectro-temporal' behaviour of the source XTE
J1859+226 in X-rays during its outburst phase in 1999, by analysing the RXTE
PCA/HEXTE data in 2 - 150 keV spectral band. Detailed analysis shows that
although the evolution pattern of the outburst followed the typical q-shaped
profile, an absence of `canonical' soft state and a weak presence of
`secondary' emission are observed. The broad-band spectra, modeled with high
energy cutoff, shows that the fold-energy increases monotonically in the hard
and hard-intermediate states followed by a random variation in the
soft-intermediate state. We attempted to estimate the mass of the source based
on the evolution of Quasi-Periodic Oscillation (QPO) frequencies during rising
phase modeled with the propagating oscillatory shock solution, and from the
correlation of photon index and QPO frequency. It is also observed that during
multiple ejections (observed as radio flares) the QPO frequencies are not
present in the power spectra which is followed by softening of the spectra
(disk flux increases or high energy flux decreases). These results are the
`possible' indication that the Comptonized corona, which could be responsible
for the generation of QPO and for the non-thermal Comptonized component of the
spectrum, is disrupted and the matter gets evacuated in the form of jet. We
attempted to explain the complex behaviour of the source during the entire
outburst and the nature of the disk-jet connection in the context of two
different types of accreting flow material, in presence of magnetic field.


title:
Fast Molecular Outflows in Luminous Galaxy Mergers: Evidence for Quasar
  Feedback from Herschel

abstract:
  We report the results from a systematic search for molecular (OH-119 um)
outflows with Herschel-PACS in a sample of 43 nearby (z < 0.3) galaxy mergers,
mostly ultraluminous infrared galaxies (ULIRGs) and QSOs. We find that the
character of the OH feature (strength of the absorption relative to the
emission) correlates with that of the 9.7-um silicate feature, a measure of
obscuration in ULIRGs. Unambiguous evidence for molecular outflows, based on
the detection of OH absorption profiles with median velocities more blueshifted
than -50 km/sec, is seen in 26 (70%) of the 37 OH-detected targets, suggesting
a wide-angle (~145 degrees) outflow geometry. Conversely, unambiguous evidence
for molecular inflows, based on the detection of OH absorption profiles with
median velocities more redshifted than +50 km/sec, is seen in only 4 objects,
suggesting a planar or filamentary geometry for the inflowing gas. Terminal
outflow velocities of ~-1000 km/sec are measured in several objects, but median
outflow velocities are typically ~-200 km s^{-1}. While the outflow velocities
show no statistically significant dependence on the star formation rate, they
are distinctly more blueshifted among systems with large AGN fractions and
luminosities [log (L_AGN / L_sun) > 11.8 +/- 0.3]. The quasars in these systems
play a dominant role in driving the molecular outflows. In contrast, the most
AGN dominated systems, where OH is seen purely in emission, show relatively
modest OH line widths, despite their large AGN luminosities, perhaps indicating
that molecular outflows subside once the quasar has cleared a path through the
obscuring material.


title:
All-order renormalization of propagator matrix for fermionic system with
  flavor mixing

abstract:
  We consider a mixed system of Dirac fermions in a general
parity-nonconserving theory and renormalize the propagator matrix to all orders
in the pole scheme, in which the squares of the renormalized masses are
identified with the complex pole positions and the wave-function
renormalization (WFR) matrices are adjusted in compliance with the
Lehmann-Symanzik-Zimmermann reduction formalism. We present closed analytic
all-order expressions and their expansions through two loops for the
renormalization constants in terms of the scalar, pseudoscalar, vector, and
pseudovector parts of the unrenormalized self-energy matrix, which is
computable from the one-particle-irreducible Feynman diagrams of the flavor
transitions. We identify residual degrees of freedom in the WFR matrices and
propose an additional renormalization condition to exhaust them. We then
explain how our results may be generalized to the case of unstable fermions, in
which we encounter the phenomenon of WFR bifurcation. In the special case of a
solitary unstable fermion, the all-order-renormalized propagator is presented
in a particularly compact form.


title:
Games of singular control and stopping driven by spectrally one-sided
  Levy processes

abstract:
  We study a zero-sum game where the evolution of a spectrally one-sided Levy
process is modified by a singular controller and is terminated by the stopper.
The singular controller minimizes the expected values of running, controlling
and terminal costs while the stopper maximizes them. Using fluctuation theory
and scale functions, we derive a saddle point and the value function of the
game. Numerical examples under phase-type Levy processes are also given.


title: $\gamma^\ast N \to N(1535)$ transition form factors

abstract:
  The form factors, as well as the helicity amplitudes for the $\gamma^\ast N
\to N(1535)$ transition are calculated in framework of the QCD light cone sum
rules. The contamination coming from diagonal transition is eliminated by
considering combinations of the sum rules corresponding to different Lorentz
structures. Similar procedure is applied for determination of the residue and
mass of the negative parity baryon. Comparison of our predictions on the
helicity amplitudes with the existing theoretical and experimental results is
also presented.


title: Rigidity Theorem of Graph-directed Fractals

abstract:
  In this paper, we identify two fractals if and only if they are biLipschitz
equivalent. Fix ratio $r,$ for dust-like graph-directed sets with ratio $r$ and
integer characteristics, we show that they are rigid in the sense that they are
uniquely determined by their Hausdorff dimensions. Using this rigidity theorem,
we show that in some class of self-similar sets, two totally disconnected
self-similar sets without complete overlaps are biLipschitz equivalent.


title: Long cycles in random subgraphs of graphs with large minimum degree

abstract:
  Let $G$ be any graph of minimum degree at least $k$, and let $G_p$ be the
random subgraph of $G$ obtained by keeping each edge independently with
probability $p$. Recently, Krivelevich, Lee and Sudakov showed that if
$pk\to\infty$ then with probability tending to 1 $G_p$ contains a cycle of
length at least $(1-o(1))k$. We give a much shorter proof of this result, also
based on depth-first search.


title:
[OI] 6300,6364 in the nebular spectrum of a subluminous Type Ia
  supernova

abstract:
  In this letter a late-phase spectrum of SN 2010lp, a subluminous Type Ia
supernova (SN Ia), is presented and analysed. As in 1991bg-like SNe Ia at
comparable epochs, the spectrum is characterised by relatively broad [FeII] and
[CaII] emission lines. However, instead of narrow [FeIII] and [CoIII] lines
that dominate the emission from the innermost regions of 1991bg-like SNe, SN
2010lp shows [OI] 6300,6364 emission, usually associated with core-collapse SNe
and never observed in a subluminous thermonuclear explosion before. The [OI]
feature has a complex profile with two strong, narrow emission peaks. This
suggests oxygen to be distributed in a non-spherical region close to the centre
of the ejecta, severely challenging most thermonuclear explosion models
discussed in the literature. We conclude that given these constraints violent
mergers are presently the most promising scenario to explain SN 2010lp.


title:
The ALHAMBRA survey: reliable morphological catalogue of 22,051 early-
  and late-type galaxies

abstract:
  ALHAMBRA is a photometric survey designed to trace the cosmic evolution and
cosmic variance. It covers a large area of ~ 4 sq. deg in 8 fields, where 7
fields overlap with other surveys, allowing to have complementary data in other
wavelengths. All observations were carried out in 20 continuous, medium band
(30 nm width) optical and 3 near-infrared (JHK) bands, providing the precise
measurements of photometric redshifts. In addition, morphological
classification of galaxies is crucial for any kind of galaxy formation and
cosmic evolution studies, providing the information about star formation
histories, their environment and interactions, internal perturbations, etc. We
present a morphological classification of > 40,000 galaxies in the ALHAMBRA
survey. We associate to every galaxy a probability to be early-type using the
automated Bayesian code galSVM. Despite of the spatial resolution of the
ALHAMBRA images (~ 1 arcsec), for 22,051 galaxies we obtained the contamination
by other type of less than 10%. Of those, 1,640 and 10,322 galaxies are
classified as early- (down to redshifts ~ 0.5) and late-type (down to redshifts
~ 1.0), respectively, with magnitudes F613W < 22.0. In addition, for magnitude
range 22.0 < F613W < 23.0 we classified other 10,089 late-type galaxies with
redshifts < 1.3. We show that the classified objects populate the expected
regions in the colour-mass and colour-magnitude planes. The presented dataset
is especially attractive given the homogeneous multi-wavelength coverage
available in the ALHAMBRA fields, and is intended to be used in a variety of
scientific applications. The low-contamination catalogue (< 10%) is made
publicly available with the present paper.


title:
A strong magnetic field around the supermassive black hole at the centre
  of the Galaxy

abstract:
  The centre of our Milky Way harbours the closest candidate for a supermassive
black hole. The source is thought to be powered by radiatively inefficient
accretion of gas from its environment. This form of accretion is a standard
mode of energy supply for most galactic nuclei. X-ray measurements have already
resolved a tenuous hot gas component from which it can be fed. However, the
magnetization of the gas, a crucial parameter determining the structure of the
accretion flow, remains unknown. Strong magnetic fields can influence the
dynamics of the accretion, remove angular momentum from the infalling gas,
expel matter through relativistic jets and lead to the observed synchrotron
emission. Here we report multi-frequency measurements with several radio
telescopes of a newly discovered pulsar close to the Galactic Centre and show
that its unusually large Faraday rotation indicates a dynamically relevant
magnetic field near the black hole. If this field is accreted down to the event
horizon it provides enough magnetic flux to explain the observed emission from
the black hole, from radio to X-rays.


title:
Dust in the diffuse interstellar medium: Extinction, emission, linear
  and circular polarisation

abstract:
  We present a model for the diffuse interstellar dust that explains the
observed wavelength-dependence of extinction, emission, linear and circular
polarisation of light. The model is set-up with a small number of parameters.
It consists of a mixture of amorphous carbon and silicate grains with sizes
from the molecular domain of 0.5 up to about 500nm. Dust grains with radii
larger than 6nm are spheroids. Spheroidal dust particles have a factor 1.5 - 3
larger absorption cross section in the far IR than spherical grains of the same
volume. Mass estimates derived from submillimeter observations that ignore this
effect are overestimated by the same amount. In the presence of a magnetic
field, spheroids may be partly aligned and polarise light. We find that
polarisation spectra help to determine the upper particle radius of the
otherwise rather unconstrained dust size distribution. Stochastically heated
small grains of graphite, silicates and polycyclic aromatic hydrocarbons (PAHs)
are included. We tabulate parameters for PAH emission bands in various
environments. They show a trend with the hardness of the radiation field that
can be explained by the ionisation state or hydrogenation coverage of the
molecules. For each dust component its relative weight is specified, so that
absolute element abundances are not direct input parameters. The model is
confronted with the average properties of the Milky Way, which seems to
represent dust in the solar neighbourhood. It is then applied to four specific
sight lines including the reflection nebula NGC2023. For these sight lines, we
present linear and circular spectro-polarimetric observations obtained with
FORS/VLT. Using prolate rather than oblate grains gives a better fit to
observed spectra; the axial ratio of the spheroids is typically two and aligned
silicates are the dominant contributor to the polarisation.


title: Catalogue of particle-accelerating colliding-wind binaries

abstract:
  Massive systems made of two or more stars are known to be the site for
interesting physical processes -- including at least in some cases -- particle
acceleration. Over the past decade, this topic motivated a particular effort to
unveil the properties of these systems and characterize the circumstances
responsible for the acceleration of particles and the potential role of
pre-supernova massive stars in the production of high energy particles in our
Galaxy. Although previous studies on this topic were mostly devoted to
processes in general, or to a few individual objects in particular, a unified
target-oriented census of particle-accelerating colliding-wind binaries
(hereafter PACWBs) does not exist yet. This paper aims at making a general and
unified census of these systems, emphasizing their main properties. A general
discussion includes energetic considerations along with wind properties in
relation with non-thermal emission processes that are likely at work in
colliding-wind binaries. Finally, some guidelines for future observational and
theoretical studies are drawn.


title:
The biphase explained: understanding the asymmetries in coupled Fourier
  components of astronomical timeseries

abstract:
  We make the first attempt to estimate and interpret the biphase data for
astronomical time series. The biphase is the phase of the bispectrum, which is
the Fourier domain equivalent of the three-point correlation function. The
bispectrum measures two key nonlinear properties of a time series -- its
reversability in time, and the symmetry about the mean of its flux distribution
-- for triplets of frequencies. Like other Fourier methods, it is especially
valuable for working with time series which contain large numbers of cycles at
the period of interest, but in which the signal-to-noise at a given frequency
is small in any individual cycle, either because of measurement errors, or
because of the contributions from signals at other frequencies. This has long
been the case for studies of X-ray binaries, but is increasingly becoming true
for stellar variability (both intrinsic and due to planetary transits) in the
Kepler era. We attempt in this paper also to present some simple examples to
give a more intuitive understanding of the meaning of the bispectrum to
readers, in order to help to understand where it may be applicable in
astronomy. In particular, we give illustrative examples of what biphases may be
shown by common astrophysical time series such as pulsars, eclipsers, stars in
the instability strip, and solar flares. We then discuss applications to the
biphase data for understanding the shapes of the quasi-periodic oscillations of
GRS 1915+105 and the coupling of the quasi-periodic oscillations to the
power-law noise in that system.


title:
Polynomial Completion of Symplectic Jets and Surfaces Containing
  Involutive Lines

abstract:
  Motivated by work of Dragt and Abell on accelerator physics, we study the
completion of symplectic jets by polynomial maps of low degrees. We use
Anders\'en-Lempert Theory to prove that symplectic completions always exist,
and we prove the degree bound conjectured by Dragt and Abell in the physically
relevant cases. However, we disprove the degree bound for 3-jets in dimension
4. This follows from the fact that if $\Sigma$ is the disjoint union of $r=7$
involutive lines in $\mathbb P^3$, then $\Sigma$ is contained in a degree $d=4$
hypersurface, i.e., the restriction morphism $\iota:H^0(\mathbb P^3,\mathcal
O(4))\rightarrow H^0(\Sigma,\mathcal O(4))$ has a nontrivial kernel (Todd). We
give two new proofs of this fact, and finally we show that if $(r,d)\neq (7,4)$
then the map $\iota$ has maximal rank.


title: A Family of Transverse Link Homologies

abstract:
  We define a homology $\mathcal{H}_N$ for closed braids by applying Khovanov
and Rozansky's matrix factorization construction with potential $ax^{N+1}$. Up
to a grading shift, $\mathcal{H}_0$ is the HOMFLYPT homology defined in
arXiv:math/0505056. We demonstrate that, for $N \geq 1$, $\mathcal{H}_N$ is a
$\mathbb{Z}_2\oplus\mathbb{Z}^{\oplus 3}$-graded $\mathbb{Q}[a]$-module that is
invariant under transverse Markov moves, but not under negative
stabilization/de-stabilization. Thus, for $N\geq 1$, this homology is an
invariant for transverse links in the standard contact $S^3$, but not for
smooth links. We also discuss the decategorification of $\mathcal{H}_N$ and the
relation between $\mathcal{H}_N$ and the $\mathfrak{sl}(N)$ Khovanov-Rozansky
homology defined in arXiv:math/0401268.


title: Primordial dark energy from a condensate of spinors in a 5D vacuum

abstract:
  We explore the possibility that the expansion of the universe can be driven
by a condensate of spinors which are free of interactions on a 5D relativistic
vacuum defined on an extended de Sitter spacetime which is Riemann-flat. The
extra coordinate is considered as noncompact. After making a static foliation
on the extra coordinate, we obtain an effective 4D (inflationary) de Sitter
expansion which describes an inflationary universe. We found that the
condensate of spinors here studied could be an interesting candidate to explain
the presence of dark energy in the early universe. The dark energy density
which we are talking about is poured into smaller sub-horizon scales with the
evolution of the inflationary expansion.


title: On coexistence and joint measurability of rank-1 quantum observables

abstract:
  We show that a rank-1 quantum observable (POVM) M is jointly measurable with
a quantum observable M' exactly when M' is a smearing of M. If M is extreme,
rank-1 and discrete then M and M' are coexistent if and only if they are
jointly measurable.


title:
Percolation on the Information-Theoretically Secure Signal to
  Interference Ratio Graph

abstract:
  We consider a continuum percolation model consisting of two types of nodes,
namely legitimate and eavesdropper nodes, distributed according to independent
Poisson point processes (PPPs) in $\bbR ^2$ of intensities $\lambda$ and
$\lambda_E$ respectively. A directed edge from one legitimate node $A$ to
another legitimate node $B$ exists provided the strength of the {\it signal}
transmitted from node $A$ that is received at node $B$ is higher than that
received at any eavesdropper node. The strength of the received signal at a
node from a legitimate node depends not only on the distance between these
nodes, but also on the location of the other legitimate nodes and an
interference suppression parameter $\gamma$. The graph is said to percolate
when there exists an infinite connected component. We show that for any finite
intensity $\lambda_E$ of eavesdropper nodes, there exists a critical intensity
$\lambda_c < \infty$ such that for all $\lambda > \lambda_c$ the graph
percolates for sufficiently small values of the interference parameter.
Furthermore, for the sub-critical regime, we show that there exists a
$\lambda_0$ such that for all $\lambda < \lambda_0 \leq \lambda_c$ a suitable
graph defined over eavesdropper node connections percolates that precludes
percolation in the graphs formed by the legitimate nodes.


title: Lexical State Analyzer

abstract:
  Lexical states provide a powerful mechanism to scan regular expressions in a
context sensitive manner. At the same time, lexical states also make it hard to
reason about the correctness of the grammar. We first categorize the related
correctness issues into two classes: errors and warnings, and then present a
context sensitive and a context insensitive analysis to identify errors and
warnings in context-free-grammars (CFGs). We also present a comparative study
of these analyses. A standalone tool (LSA) has also been implemented by us that
can identify errors and warnings in JavaCC grammars. The LSA tool outputs a
graph that depicts the grammar and the error transitions. It can also generates
counter example strings that can be used to establish the errors. We have used
LSA to analyze a host of open-source JavaCC grammar files to good effect.


title:
Decay Constants of Heavy Pseudoscalar Mesons: Reconciling QCD Sum Rules
  and Lattice QCD

abstract:
  Exploiting recently proposed novel improvements of the techniques used for
extracting from QCD sum rules pivotal hadron characteristics, including their
systematic errors, we succeed to achieve a conspicuous agreement of the
predictions of QCD sum rules for the decay constants $f_B$ and $f_{B_s}$ of the
heavy pseudoscalar mesons $B$ and $B_s,$ which before tended to be slightly too
large, with corresponding results from lattice QCD. Adopting for the crucial
$b$-quark $\bar{\rm MS}$ mass the value $\bar{m}_b(\bar{m}_b)=(4.247\pm0.034)$
GeV, we get $f_B=(192.0\pm14.6)$ MeV and $f_{B_s}=(228.0\pm19.8)$ MeV; clearly,
this may be also viewed as a determination of the $b$-quark mass from
sufficiently precise decay constants.


title: Simulating the charged charmoniumlike structure $Z_c(4025)$

abstract:
  Inspired by recent observation of charged charmoniumlike structure
$Z_c(4025)$, we explore the $Y(4260)\to (D^*\bar{D}^*)^- \pi^+$ decay through
the initial-single-pion-emission mechanism, where the $D^*\bar{D}^*\to
D^*\bar{D}^*$ interaction is studied by the ladder approximation including a
non-interacting case. Our calculation of the differential decay width for
$Y(4260)\to (D^*\bar{D}^*)^- \pi^+$ indicates that a charged enhancement
structure around $D^*\bar{D}^*$ appears in the $D^*\bar{D}^*$ invariant mass
spectrum for this process, which can correspond to newly observed $Z_c(4025)$
structure.


title:
Simulation of light propagation in thin semiconductor films with
  non-local electron-photon interaction

abstract:
  The propagation of light in layered semiconductor media is described
theoretically and simulated numerically within the framework of the
non-equilibrium Green's function formalism as used for state-of-the-art
nanodevice simulations, treating the non-local interaction of leaky photonic
modes with the electronic states of thin semiconductor films on a
non-equilibrium quantum statistical mechanics level of theory. For a diagonal
photon self-energy corresponding to local coupling, the simulation results for
a 500 nm GaAs slab under normal incidence are in excellent agreement with the
predictions from the conventional transfer matrix method. The deviations of the
local approximation from the result provided by the fully non-local photon
self-energy for a 100 nm GaAs film are found to be small.


title:
A Preliminary Calibration of the RR Lyrae Period-Luminosity Relation at
  Mid-Infrared Wavelengths: WISE Data

abstract:
  Using time-resolved, mid-infrared data from WISE and geometric parallaxes
from HST for four Galactic RR Lyrae variables, we derive the following
Population II Period-Luminosity (PL) relations for the WISE [W1], [W2] and [W3]
bands at 3.4, 4.6 & 12 um, respectively:
  M[W1] = -2.44 (+/- 0.95) x logP - 1.26 (+/- 0.25) sigma = 0.10
  M[W2] = -2.55 (+/- 0.89) x logP - 1.29 (+/- 0.23) sigma = 0.10
  M[W3] = -2.58 (+/- 0.97) x logP - 1.32 (+/- 0.25) sigma = 0.10
  The slopes and the scatter around the fits are consistent with a smooth
extrapolation of those same quantities from previously-published K-band
observations at 2.2 um, where the asymptotic (long-wavelength) behavior is
consistent with a Period-Radius relation having a slope of 0.5. No obvious
correlation with metallicity (spanning 0.4 dex in [Fe/H]) is found in the
residuals of the four calibrating RR Lyrae stars about the mean PL regression
line.


title: Routing Games with Progressive Filling

abstract:
  Max-min fairness (MMF) is a widely known approach to a fair allocation of
bandwidth to each of the users in a network. This allocation can be computed by
uniformly raising the bandwidths of all users without violating capacity
constraints. We consider an extension of these allocations by raising the
bandwidth with arbitrary and not necessarily uniform time-depending velocities
(allocation rates). These allocations are used in a game-theoretic context for
routing choices, which we formalize in progressive filling games (PFGs).
  We present a variety of results for equilibria in PFGs. We show that these
games possess pure Nash and strong equilibria. While computation in general is
NP-hard, there are polynomial-time algorithms for prominent classes of
Max-Min-Fair Games (MMFG), including the case when all users have the same
source-destination pair. We characterize prices of anarchy and stability for
pure Nash and strong equilibria in PFGs and MMFGs when players have different
or the same source-destination pairs. In addition, we show that when a designer
can adjust allocation rates, it is possible to design games with optimal strong
equilibria. Some initial results on polynomial-time algorithms in this
direction are also derived.


title:
Observation of conformal symmetry breaking and scale invariance in
  expanding Fermi gases

abstract:
  We precisely test scale invariance and local thermal equilibrium in the
hydrodynamic expansion of a Fermi gas of atoms as a function of interaction
strength. After release from an anisotropic optical trap, we observe that a
resonantly interacting gas obeys scale-invariant hydrodynamics, where the mean
square cloud size $\langle{\mathbf{r}}^2\rangle=\langle x^2+y^2+z^2\rangle$
expands ballistically (like a noninteracting gas) and the energy-averaged bulk
viscosity is consistent with zero, $0.005(0.016)\,\hbar\,n$, with $n$ the
density. In contrast, the aspect ratios of the cloud exhibit anisotropic
"elliptic" flow with an energy-dependent shear viscosity. Tuning away from
resonance, we observe conformal symmetry breaking, where
$\langle{\mathbf{r}}^2\rangle$ deviates from ballistic flow.


title: Artin-Schreier L-functions and Random Unitary Matrices

abstract:
  We give a new derivation of an identity due to Z. Rudnick and P. Sarnak about
the $n$-level correlations of eigenvalues of random unitary matrices as well as
a new proof of a formula due to M. Diaconis and P. Shahshahani expressing
averages of trace products over the unitary matrix ensemble. Our method uses
the zero statistics of Artin-Schreier L-functions and a deep equidistribution
result due to N. Katz and P. Sarnak.


title:
Microscopic description of nuclear vibrations: Relativistic QRPA and its
  extensions with quasiparticle-vibration coupling

abstract:
  The recent extensions of the covariant energy density functional theory with
the quasiparticle-vibration coupling (QVC) are reviewed. Formulation of the
Quasiparticle Random Phase Approximation (QRPA) in the relativistic framework
is discussed. Self-consistent extensions of the relativistic QRPA imply the QVC
which is implemented in two-body propagators in the nuclear medium. This
provides fragmentation of the QRPA states describing the damping of the
vibrational motion.


title: It From Bit and The Unsmooth Reality

abstract:
  In this short essay it is argued that the "It from Bit" idea is plausible
when assuming "generalized bits", resulting from the Kolmogorov superposition
theorem, as universal building blocks.


title: Gauge invariance of the $h^0\rightarrow\gamma\gamma$ amplitude

abstract:
  We point out that the one-loop amplitude of the $h^0\rightarrow\gamma\gamma$
decay is gauge invariant owing to a particular relation between the trilinear
couplings and the Higgs boson mass. This relation follows only from the gauge
symmetry breaking pattern realized by the potential of the scalar fields and
not on its specific form. This allows to justify the seemingly inconsistent
calculation of the $h^0\rightarrow\gamma\gamma$ amplitude in the minimal
supersymmetric model (MSSM) in which one takes the mass of the lighter Higgs
boson from e.g. the one-loop effective potential.


title:
The EDMR Microscope - Combining Conductive Atomic Force Microscopy with
  Electrically Detected Magnetic Resonance

abstract:
  We present the design and implementation of a scanning probe microscope,
which combines electrically detected magnetic resonance (EDMR) and
(photo-)conductive atomic force microscopy ((p)cAFM). The integration of a
3-loop 2-gap X-band microwave resonator into an AFM allows the use of
conductive AFM tips as a movable contact for EDMR experiments. The optical
readout of the AFM cantilever is based on an infrared laser to avoid
disturbances of current measurements by absorption of straylight of the
detection laser. Using amorphous silicon thin film samples with varying defect
densities, the capability to detect a spatial EDMR contrast is demonstrated.
Resonant current changes as low as 20 fA can be detected, allowing the method
to realize a spin sensitivity of 8*10^6 spins/Hz^0.5 at room temperature.


title:
Binary and multiple magnetic Ap/Bp stars. Proceedings of IAUS 302:
  Magnetic fields throughout stellar evolution

abstract:
  We present the results of speckle interferometric observations of 273
magnetic stars most of which are Ap/Bp type. All observations were made at the
6-m telescope of the Special Astrophysical Observatory of the Russian Academy
of Sciences. We resolved 58 binary and 5 triple stars into individual
components. Almost half of these stars were astrometrically resolved for the
first time. The fraction of speckle interferometric binaries/multiples in the
sample of stars with confirmed magnetic fields is 23%. We expect that the total
fraction of binaries/multiples in the sample with account for spectroscopic
short-period systems and wide common proper motion pairs can be twice higher.
The detected speckle components have a prominent peak in the {\rho}
distribution that corresponds to the closest resolved pairs.


title: Low-energy properties of fractional helical Luttinger liquids

abstract:
  We investigate the low-energy properties of (quasi) helical and fractional
helical Luttinger liquids. In particular, we calculate the Drude peak of the
optical conductivity, the density of states, as well as charge transport
properties of the interacting system with and without attached Fermi liquid
leads at small and large (compared to the gap) frequencies. For fractional
wires, we find that the low energy tunneling density of states vanishes. The
conductance of a fractional helical Luttinger liquid is non-integer. It is
independent of the Luttinger parameters in the wire, despite the intricate
mixing of charge and spin degrees of freedom, and only depends on the relative
locking of charge and spin degrees of freedom.


title:
X-ray cross-correlation analysis of liquid crystal membranes in the
  vicinity of hexatic-smectic phase transition

abstract:
  We present an x-ray study of liquid crystal membranes in the vicinity of
hexatic-smectic phase transition by means of angular x-ray cross-correlation
analysis (XCCA). By applying two-point angular intensity cross-correlation
functions to the measured series of diffraction patterns the parameters of
bond-orientational (BO) order in hexatic phase were directly determined. The
temperature dependence of the positional correlation lengths was analyzed as
well. The obtained correlation lengths show larger values for the higher-order
Fourier components of BO order. These findings indicate a strong coupling
between BO and positional order that has not been studied in detail up to now.


title: IceCube: Neutrino Physics from GeV - PeV

abstract:
  An update on recent discoveries by the IceCube project, which transforms
approximately one cubic kilometer of natural Antarctic ice into a Cherenkov
detector. This paper will be submitted to SLAC for inclusion in the
Snowmass2013 proceedings


title:
Realistic simulations reveal extensive sample-specificity of RNA-seq
  biases

abstract:
  In line with the importance of RNA-seq, the bioinformatics community has
produced numerous data analysis tools incorporating methods to correct
sample-specific biases. However, few advanced simulation tools exist to enable
benchmarking of competing correction methods. We introduce the first framework
to reproduce the properties of individual RNA-seq runs and, by applying it on
several datasets, we demonstrate the importance of accounting for
sample-specificity in realistic simulations.


title: Intrinsic Fluctuations of Dust Grain Charge in Multi-component Plasmas

abstract:
  A master equation is formulated to model the states of the grain charge in a
general multi-component plasma, where there are electrons and various kinds of
positive or negative ions that are singly or multiply charged. A Fokker-Planck
equation is developed from the master equation through the system-size
expansion method. The Fokker-Planck equation has a Gaussian solution with a
mean and variance governed by two initial-value differential equations
involving the rates of the attachment of ions and electrons to the dust grain.
Grain charging in a plasma containing electrons, protons and alpha particles
with Maxwellian distributions is considered as an example problem. The Gaussian
solution is in very good agreement with the master equation solution
numerically obtained for this problem.