title:
Fermi LAT Observations of Supernova Remnants Interacting with Molecular
  Clouds: W41, MSH 17-39, and G337.0-0.1

abstract:
  We report the detection of gamma-ray emission coincident with three supernova
remnants (SNRs) using data from the Large Area Telescope on board the Fermi
Gamma-ray Space Telescope. W41, MSH 17-39, and G337.0-0.1 are SNRs known to be
interacting with molecular clouds, as evidenced by observations of hydroxyl
(OH) maser emission at 1720 MHz in their directions and other observational
information. SNR shocks are expected to be sites of cosmic ray acceleration,
and clouds of dense material can provide effective targets for production of
gamma-rays from neutral pion-decay. The observations reveal unresolved sources
in the direction of G337.0-0.1, and MSH 17-39, and an extended source
coincident with W41. We model their broadband emission (radio to gamma-ray)
using a simple one-zone model, and after considering scenarios in which the
MeV-TeV sources originate from either neutral pion-decay or leptonic emission,
we conclude that the gamma-rays are most likely produced through the hadronic
channel.


title: Azimuthal Anisotropy from STAR Experiment

abstract:
  We report the measurement of first (\textit{n} = 1) and higher
order(\textit{n} = 2-5) harmonic coefficients ($v_{n}$) of the azimuthal
anisotropy in the distribution of the particles produced in Au+Au collisions at
$\sqrt{s_{NN}}$ =200 GeV and U+U collisions at $\sqrt{s_{NN}}$ =193 GeV,
recorded with the STAR detector at RHIC. The differential measurement of
$(v_{n})$ is presented as a function of transverse momentum ($p_{T}$) and
centrality. We also present $v_{n}$ measurement in the ultra-central collisions
in U+U collisions. These data may provide strong constraints on the theoretical
models of the initial condition in heavy ion collisions and the transport
properties of the produced medium.


title: Making the case of GPUs in courses on computational physics

abstract:
  Most relatively modern desktop or even laptop computers contain a graphics
card useful for more than showing colors on a screen. In this paper, we make a
case for why you should learn enough about GPU (graphics processing unit)
computing to use as an accelerator or even replacement to your CPU code. We
include an example of our own as a case study to show what can be realistically
expected.


title: Boosting Majorana zero modes

abstract:
  One-dimensional topological superconductors are known to host Majorana zero
modes at domain walls terminating the topological phase. Their nonabelian
nature allows for processing quantum information by braiding operations which
are insensitive to local perturbations, making Majorana zero modes a promising
platform for topological quantum computation. Motivated by the ultimate goal of
executing quantum information processing on a finite timescale, we study domain
walls moving at a constant velocity. We exploit an effective Lorentz invariance
of the Hamiltonian to obtain an exact solution of the associated quasiparticle
spectrum and wave functions for arbitrary velocities. Essential features of the
solution have a natural interpretation in terms of the familiar relativistic
effects of Lorentz contraction and time dilation. We find that the Majorana
zero modes remain stable as long as the domain wall moves at subluminal
velocities with respect to the effective speed of light of the system. However,
the Majorana bound state dissolves into a continuous quasiparticle spectrum
once the domain wall propagates at luminal or even superluminal velocities.
This relativistic catastrophe implies that there is an upper limit for possible
braiding frequencies even in a perfectly clean system with an arbitrarily large
topological gap. We also exploit our exact solution to consider domain walls
moving past static impurities present in the system.


title: General beta Jacobi corners process and the Gaussian Free Field

abstract:
  We prove that the two-dimensional Gaussian Free Field describes the
asymptotics of global fluctuations of a multilevel extension of the general
beta Jacobi random matrix ensembles. Our approach is based on the connection of
the Jacobi ensembles to a degeneration of the Macdonald processes that
parallels the degeneration of the Macdonald polynomials to to the Heckman-Opdam
hypergeometric functions (of type A). We also discuss the beta goes to infinity
limit.


title: Background studies for the EDELWEISS dark matter experiment

abstract:
  The EDELWEISS-II collaboration has completed a direct search for WIMP dark
matter using cryogenic Ge detectors (400 g each) and 384 kg$\times$days of
effective exposure. A cross-section of $4.4 \times 10^{-8}$ pb is excluded at
90% C.L. for a WIMP mass of 85 GeV. The next phase, EDELWEISS-III, aims to
probe spin-independent WIMP-nucleon cross-sections down to a few
$\times10^{-9}$ pb. We present here the study of gamma and neutron background
coming from radioactive decays in the set-up and shielding materials. We have
carried out Monte Carlo simulations for the completed EDELWEISS-II setup with
GEANT4 and normalised the expected background rates to the measured
radioactivity levels (or their upper limits) of all materials and components.
The expected gamma-ray event rate in EDELWEISS-II at 20-200 keV agrees with the
observed rate of 82 events/kg/day within the uncertainties in the measured
concentrations. The calculated neutron rate from radioactivity of 1.0-3.1
events (90% C.L.) at 20-200 keV in the EDELWEISS-II data together with the
expected upper limit on the misidentified gamma-ray events ($\le0.9$), surface
betas ($\le0.3$), and muon-induced neutrons ($\le0.7$), do not contradict 5
observed events in nuclear recoil band. We have then extended the simulation
framework to the EDELWEISS-III configuration with 800 g crystals, better
material purity and additional neutron shielding inside the cryostat. The
gamma-ray and neutron backgrounds in 24 kg fiducial mass of EDELWEISS-III have
been calculated as 14-44 events/kg/day and 0.7-1.4 events per year,
respectively. The results of the background studies performed in the present
work have helped to select better purity components and improve shielding in
EDELWEISS-III to further reduce the expected rate of background events in the
next phase of the experiment.


title: Squares and Covering Matrices

abstract:
  Viale introduced covering matrices in his proof that SCH follows from PFA. In
the course of the proof amd subsequent work with Sharon, he isolated two
reflection principles, CP and S, which, under certain circumstances, are
satisfied by all covering matrices of a certain shape. Using square sequences,
we construct covering matrices for which CP and S fail. This leads naturally to
an investigation of square principles intermediate between $\square_{\kappa}$
and $\square(\kappa^+)$ for a regular cardinal $\kappa$. We provide a detailed
picture of the implications between these square principles.


title: Is the black hole in NGC1277 really over-massive?

abstract:
  A claim has been made by van den Bosch et al. (2012) that NGC1277 hosts an
over-massive BH with a mass larger than half its spheroid mass. We revisit this
claim by examining the predictions from dynamical realisations based on new MGE
models of NGC1277. We present realisations which fit the observed photometry.
M/L is fixed following scaling relations which predict a Salpeter-like IMF. A
model without a BH provides a surprisingly good fit of the observed kinematics
outside the unresolved central region, but not, as expected, of the central
dispersion and h4 values. A model with a MBH of 5 10^9 Msun allows to fit the
dispersion profile, consistently with models of the same mass and M/L in
vdB+12. It departs from the central h4 values by only about twice the given
uncertainty. A slightly varying M/L or the addition of high velocity stars
would further lower the need for a very massive BH. These results do not rule
out the presence of an over-massive BH at the centre of NGC1277. However, they
lead us to advocate the use of 3-sigma confidence intervals for derived MBH as
better, more conservative, guidelines for such studies. We caution for the use
of ill-defined spheroidal components as an input for scaling relations, and
emphasise the fact that a MBH in the range 2-5 10^9 Msun would represent less
than 5% of the spheroid mass of our models. This would make the BH in NGC1277
consistent or just twice as large as what a recent version of the MBH-sigma
relation predicts. We examine the impact of the presence of a bar by running
simulations from the same MGE model but with extreme anisotropies. An inner
small bar forms, and an end-on view gets closer to fitting the central
dispersion profile without the need for a central BH, while adding a black hole
of 2.5 10^9 Msun, in line with the prediction from scaling relations, allows to
fit the dispersion peak and h3 profiles. EDITED and ABRIDGED.


title:
A statistical dynamical study of meteorite impactors: a case study based
  on parameters derived from the Bosumtwi impact event

abstract:
  The study of meteorite craters on Earth provides information about the
dynamic evolution of bodies within the Solar System. Bosumtwi crater is a well
studied, 10.5 km in diameter, ca. 1.07 Ma old impact structure located in
Ghana. The impactor was $\sim$ 1 km in diameter, an ordinary chondrite and
struck the Earth with an angle between 30$^\circ$ and 45$^\circ$ from the
horizontal. We have used a two phase backward integration to constrain the most
probable parent region of the impactor. We find that the most likely source
region is a high inclination object from the Middle Main Belt.


title:
Low temperature structural effects in the (TMTSF)$_2$PF$_6$ and AsF$_6$
  Bechgaard salts

abstract:
  We present a detailed low-temperature investigation of the statics and
dynamics of the anions and methyl groups in the organic conductors
(TMTSF)$_2$PF$_6$ and (TMTSF)$_2$AsF$_6$ (TMTSF :
tetramethyl-tetraselenafulvalene). The 4 K neutron scattering structure
refinement of the fully deuterated (TMTSF)$_2$PF$_6$-D12 salt allows locating
precisely the methyl groups at 4 K. This structure is compared to the one of
the fully hydrogenated (TMTSF)$_2$PF$_6$-H12 salt previously determined at the
same temperature. Surprisingly it is found that deuteration corresponds to the
application of a negative pressure of 5 x 10$^2$ MPa to the H12 salt. Accurate
measurements of the Bragg intensity show anomalous thermal variations at low
temperature both in the deuterated PF$_6$ and AsF$_6$ salts. Two different
thermal behaviors have been distinguished. Low-Bragg-angle measurements reflect
the presence of low-frequency modes at characteristic energies {\theta}$_E$ =
8.3 K and {\theta}$_E$ = 6.7 K for the PF$_6$-D12 and AsF$_6$-D12 salts,
respectively. These modes correspond to the low-temperature methyl group
motion. Large-Bragg-angle measurements evidence an unexpected structural change
around 55 K which probably corresponds to the linkage of the anions to the
methyl groups via the formation of F...D-CD2 bonds observed in the 4 K
structural refinement. Finally we show that the thermal expansion coefficient
of (TMTSF)$_2$PF$_6$ is dominated by the librational motion of the PF$_6$
units. We quantitatively analyze the low-temperature variation of the lattice
expansion via the contribution of Einstein oscillators, which allows us to
determine for the first time the characteristic frequency of the PF6
librations: {\theta}$_E$ = 50 K and {\theta}$_E$ = 76 K for the PF$_6$-D12 and
PF$_6$-H12 salts, respectively.


title:
Classification for Big Dataset of Bioacoustic Signals Based on Human
  Scoring System and Artificial Neural Network

abstract:
  In this paper, we propose a method to improve sound classification
performance by combining signal features, derived from the time-frequency
spectrogram, with human perception. The method presented herein exploits an
artificial neural network (ANN) and learns the signal features based on the
human perception knowledge. The proposed method is applied to a large acoustic
dataset containing 24 months of nearly continuous recordings. The results show
a significant improvement in performance of the detection-classification
system; yielding as much as 20% improvement in true positive rate for a given
false positive rate.


title:
Modeling the Dichotomy of the Immune Response to Cancer: Cytotoxic
  Effects and Tumor-Promoting Inflammation

abstract:
  Although the immune response is often regarded as acting to suppress tumor
growth, it is now clear that it can be both stimulatory and inhibitory. The
interplay between these competing influences has complex implications for tumor
development and cancer dormancy. To study this biological phenomenon
theoretically we construct a minimally parameterized framework that
incorporates all aspects of the immune response. We combine the effects of all
immune cell types, general principles of self-limited logistic growth, and the
physical process of inflammation into one quantitative setting. Simulations
suggest that while there are pro-tumor or antitumor immunogenic responses
characterized by larger or smaller final tumor volumes, respectively, each
response involves an initial period where tumor growth is stimulated beyond
that of growth without an immune response. The mathematical description is
non-identifiable which allows us to capture inherent biological variability in
tumor growth that can significantly alter tumor-immune dynamics and thus
treatment success rates. The ability of this model to predict immunomodulation
of tumor growth may offer a template for the design of novel treatment
approaches that exploit immune response to improve tumor suppression, including
the potential attainment of an immune-induced dormant state.


title:
Bioacoustic Signal Classification Based on Continuous Region Processing,
  Grid Masking and Artificial Neural Network

abstract:
  In this paper, we develop a novel method based on machine-learning and image
processing to identify North Atlantic right whale (NARW) up-calls in the
presence of high levels of ambient and interfering noise. We apply a continuous
region algorithm on the spectrogram to extract the regions of interest, and
then use grid masking techniques to generate a small feature set that is then
used in an artificial neural network classifier to identify the NARW up-calls.
It is shown that the proposed technique is effective in detecting and capturing
even very faint up-calls, in the presence of ambient and interfering noises.
The method is evaluated on a dataset recorded in Massachusetts Bay, United
States. The dataset includes 20000 sound clips for training, and 10000 sound
clips for testing. The results show that the proposed technique can achieve an
error rate of less than FPR = 4.5% for a 90% true positive rate.


title: High-frequency Light Reflector via Low-frequency Light Control

abstract:
  We show that the momentum of light can be reversed via the atomic coherence
created by another light with one or two orders of magnitude lower frequency.
Both the backward retrieval of single photons from a timed Dicke state and the
reflection of continuous waves by high-order photonic band gaps are analysed.
The required control field strength scales linearly with the nonlinearity
order, which is explained by the dynamics of superradiance lattices.
Experiments are proposed with $^{85}$Rb atoms and Be$^{2+}$ ions. This holds
promise for light-controllable X-ray reflectors.


title: One dyonic instanton in 5d maximal SYM theory

abstract:
  We study the one-instanton sector of 5d U(N) maximal SYM theory. By using the
moduli space approximation we obtain all the 1/4-BPS bound states of one dyonic
instanton when a vev is given to one of the SYM scalar fields that breaks U(N)
maximally. We compute the corresponding 1/4-BPS index and partition function
and find agreement with arXiv:1110.2175.


title:
The Quantum Spherical Spin Glass Model: A Limitation to Static
  Approximation

abstract:
  In this work, we confront the static approximate with a exact solution in the
quantum spherical p-spin interaction model (p->oo and p=2). On the one hand,
this study indicates that the static approximate corresponds to exact solution
in the cases p->oo and p = 2 in the classic regime. On the other, the static
approximate differs from the exact solution for p=2 in the quantum regime.


title:
Local error estimates for adaptive simulation of the Reaction-Diffusion
  Master Equation via operator splitting

abstract:
  The efficiency of exact simulation methods for the reaction-diffusion master
equation (RDME) is severely limited by the large number of diffusion events if
the mesh is fine or if diffusion constants are large. Furthermore, inherent
properties of exact kinetic-Monte Carlo simulation methods limit the efficiency
of parallel implementations. Several approximate and hybrid methods have
appeared that enable more efficient simulation of the RDME. A common feature to
most of them is that they rely on splitting the system into its reaction and
diffusion parts and updating them sequentially over a discrete timestep. This
use of operator splitting enables more efficient simulation but it comes at the
price of a temporal discretization error that depends on the size of the
timestep. So far, existing methods have not attempted to estimate or control
this error in a systematic manner. This makes the solvers hard to use for
practitioners since they must guess an appropriate timestep. It also makes the
solvers potentially less efficient than if the timesteps are adapted to control
the error. Here, we derive estimates of the local error and propose a strategy
to adaptively select the timestep when the RDME is simulated via a first order
operator splitting. While the strategy is general and applicable to a wide
range of approximate and hybrid methods, we exemplify it here by extending a
previously published approximate method, the Diffusive Finite-State Projection
(DFSP) method, to incorporate temporal adaptivity.


title:
Hierarchically-coupled hidden Markov models for learning kinetic rates
  from single-molecule data

abstract:
  We address the problem of analyzing sets of noisy time-varying signals that
all report on the same process but confound straightforward analyses due to
complex inter-signal heterogeneities and measurement artifacts. In particular
we consider single-molecule experiments which indirectly measure the distinct
steps in a biomolecular process via observations of noisy time-dependent
signals such as a fluorescence intensity or bead position. Straightforward
hidden Markov model (HMM) analyses attempt to characterize such processes in
terms of a set of conformational states, the transitions that can occur between
these states, and the associated rates at which those transitions occur; but
require ad-hoc post-processing steps to combine multiple signals. Here we
develop a hierarchically coupled HMM that allows experimentalists to deal with
inter-signal variability in a principled and automatic way. Our approach is a
generalized expectation maximization hyperparameter point estimation procedure
with variational Bayes at the level of individual time series that learns an
single interpretable representation of the overall data generating process.


title:
Excitation spectrum of interacting bosons in the mean-field
  infinite-volume limit

abstract:
  We consider homogeneous Bose gas in a large cubic box with periodic boundary
conditions, at zero temperature. We analyze its excitation spectrum in a
certain kind of a mean field infinite volume limit. We prove that under
appropriate conditions the excitation spectrum has the form predicted by the
Bogoliubov approximation. Our result can be viewed as an extension of the
result of R. Seiringer (arXiv:1008.5349 [math-ph]) to large volumes.

categories: math-ph cond-mat.quant-gas cond-mat.stat-mech math.MP


title: Synthesizing Quantum Circuits for Simple Periodic Functions

abstract:
  Periodic functions are of special importance in quantum computing,
particularly in applications of Shor's algorithm. We explore methods of
creating circuits for periodic functions to better understand their properties.
We introduce a method for constructing the circuit for a simple monoperiodic
function, that is one-to-one within a single period, of a given period p. We
conjecture that to create a simples periodic function of period p, where p is
an n-bit number, one needs at most n Toffoli gates.


title: Heating of Micro-protrusions in Accelerating Structures

abstract:
  The thermal and field emission of electrons from protrusions on metal
surfaces is a possible limiting factor on the performance and operation of
high-gradient room temperature accelerator structures. We present here the
results of extensive numerical simulations of electrical and thermal behavior
of protrusions. We unify the thermal and field emission in the same numerical
framework, describe bounds for the emission current and geometric enhancement,
then we calculate the Nottingham and Joule heating terms and solve the heat
equation to characterize the thermal evolution of emitters under RF electric
field. Our findings suggest that, heating is entirely due to the Nottingham
effect, that thermal runaway scenarios are not likely, and that high RF
frequency causes smaller swings in temperature and cooler tips. We build a
phenomenological model to account for the effect of space charge and show that
space charge eliminates the possibility of tip melting, although near melting
temperatures reached.


title: Sound and light from fractures in scintillators

abstract:
  Prompted by intriguing events observed in certain particle-physics searches
for rare events, we study light and acoustic emission simultaneously in some
inorganic scintillators subject to mechanical stress. We observe
mechanoluminescence in ${Bi}_4{Ge}_{3}{O}_{12}$, ${CdWO}_{4}$ and ${ZnWO}_{4}$,
in various mechanical configurations at room temperature and ambient pressure.
We analyze how the light emission is correlated to acoustic emission during
fracture. For ${Bi}_4{Ge}_{3}{O}_{12}$, we set a lower bound on the energy of
the emitted light, and deduce that the fraction of elastic energy converted to
light is at least $3 \times 10^{-5}$.


title: The Origin and Chemical Evolution of the Exotic Globular Cluster NGC3201

abstract:
  NGC3201 is a globular cluster (GC) which shows very peculiar kinematic
characteristics including an extreme radial velocity and a highly retrograde
orbit, strongly suggesting an extraGalactic origin. Our aims are to study
NGC3201 in the context of multiple populations (MPs), hoping to constrain
possible candidates for the self-enrichment by studying the chemical abundance
pattern, as well as adding insight into the origin of this intriguing cluster.
We present a detailed chemical abundance analysis of eight red giant branch
(RGB) stars using high resolution spectroscopy. We measured 29 elements and
found [Fe/H]=-1.53+/-0.01, we cannot rule out a metallicity spread of ~0.12
dex, and an alpha-enhancement typical of halo GCs. However significant spreads
are observed in the abundances of all light elements except for Mg. We confirm
the presence of an extended Na-O anticorrelation. n-capture elements generally
are dominated by the r-process, in good agreement with the bulk of Galactic
GCs. The total (C+N+O) abundance is slightly supersolar and requires a small
downward correction to the isochrone age, yielding 11.4 Gyr. Kinematically,
NGC3201 appears likely to have had an extraGalactic origin but its chemical
evolution is similar to most other, presumably native, Galactic GCs.


title: The plasmoid instability during asymmetric inflow magnetic reconnection

abstract:
  Theoretical studies of the plasmoid instability generally assume that the
reconnecting magnetic fields are symmetric. We relax this assumption by
performing two-dimensional resistive magnetohydrodynamic simulations of the
plasmoid instability during asymmetric inflow magnetic reconnection. Magnetic
asymmetry modifies the onset, scaling, and dynamics of this instability.
Magnetic islands develop preferentially into the weak magnetic field upstream
region. Outflow jets from individual X-points impact plasmoids obliquely rather
than directly as in the symmetric case. Consequently, deposition of momentum by
the outflow jets into the plasmoids is less efficient, the plasmoids develop
net vorticity, and shear flow slows down secondary merging between islands.
Secondary merging events have asymmetry along both the inflow and outflow
directions. Downstream plasma is more turbulent in cases with magnetic
asymmetry because islands are able to roll around each other after exiting the
current sheet. As in the symmetric case, plasmoid formation facilitates faster
reconnection for at least small and moderate magnetic asymmetries. However,
when the upstream magnetic field strengths differ by a factor of four, the
reconnection rate plateaus at a lower value than expected from scaling the
symmetric results. We perform a parameter study to investigate the onset of the
plasmoid instability as a function of magnetic asymmetry and domain size. There
exist domain sizes for which symmetric simulations are stable but asymmetric
simulations are unstable, suggesting that moderate magnetic asymmetry is
somewhat destabilizing. We discuss the implications for plasmoid and flux rope
formation in solar eruptions, laboratory reconnection experiments, and space
plasmas. The differences between symmetric and asymmetric simulations provide
some hints regarding the nature of the three-dimensional plasmoid instability.


title:
Instrumental Methods for Professional and Amateur Collaborations in
  Planetary Astronomy

abstract:
  Amateur contributions to professional publications have increased
exponentially over the last decades in the field of Planetary Astronomy. Here
we review the different domains of the field in which collaborations between
professional and amateur astronomers are effective and regularly lead to
scientific publications. We discuss the instruments, detectors, softwares and
methodologies typically used by amateur astronomers to collect the scientific
data in the different domains of interest. Amateur contributions to the
monitoring of planets and interplanetary matter, characterization of asteroids
and comets, as well as the determination of the physical properties of Kuiper
Belt Objects and exoplanets are discussed.


title: Stabilizers of Actions of Lattices in Products of Groups

abstract:
  We prove that any ergodic nonatomic probability-preserving action of an
irreducible lattice in a semisimple group, at least one factor being connected
and higher-rank, is essentially free. This generalizes the result of Stuck and
Zimmer that the same statement holds when the ambient group is a semisimple
real Lie group and every simple factor is higher-rank.
  We also prove a generalization of a result of Bader and Shalom by showing
that any probability-preserving action of a product of simple groups, at least
one with property (T), which is ergodic for each simple subgroup is either
essentially free or essentially transitive.
  Our method involves the study of relatively contractive maps and the
Howe-Moore property, rather than the relaying on algebraic properties of
semisimple groups and Poisson boundaries, and introduces a generalization of
the ergodic decomposition to invariant random subgroups of independent
interest.


title:
No-Forcing and No-Matching Theorems for Classical Probability Applied to
  Quantum Mechanics

abstract:
  Correlations of spins in a system of entangled particles are inconsistent
with Kolmogorov's probability theory (KPT), provided the system is assumed to
be non-contextual. In the Alice-Bob EPR paradigm, non-contextuality means that
the identity of Alice's spin (i.e., the probability space on which it is
defined as a random variable) is determined only by the axis \alphai chosen by
Alice, irrespective of Bob's axis \betaj (and vice versa). Here, we study
contextual KPT models, with two properties: (1) Alice's and Bob's spins are
identified as Aij and Bij, even though their distributions are determined by,
respectively, \alphai alone and \betaj alone, in accordance with the
no-signaling requirement; and (2) the joint distributions of the spins Aij,Bij
across all values of \alphai,\betaj are constrained by fixing distributions of
some subsets thereof. Of special interest among these subsets is the set of
probabilistic connections, defined as the pairs \left(Aij,Aij'\right) and
\left(Bij,Bi'j\right) with \alphai\not=\alphai' and \betaj\not=\betaj' (the
non-contextuality assumption is obtained as a special case of connections, with
zero probabilities of Aij\not=Aij' and Bij\not=Bi'j). Thus, one can achieve a
complete KPT characterization bof the Bell-type inequalities, or Tsirelson's
inequalities, by specifying the distributions of probabilistic connections
compatible with those and only those spin pairs \left(Aij,Bij\right) that are
subject to these inequalities. We show, however, that quantum-mechanical (QM)
constraints are special. No-forcing theorem says that if a set of probabilistic
connections is not compatible with correlations violating QM, then it is
compatible only with the classical-mechanical correlations. No-matching theorem
says that there are no subsets of the spin variables Aij,Bij whose
distributions can be fixed to be compatible with and only with QM-compliant
correlations.


title: Off-axis excitation of hydrogenlike atoms by twisted photons

abstract:
  We show that the twisted photon states, or photon states with large ($>
\hbar$) angular momentum projection ($m_\gamma$) in the direction of motion,
can photoexcite atomic levels for a hydrogen-like atom that are novel and
distinct and are not restricted by $m_\gamma$, when the symmetry axis of the
twisted-photon beam does not coincide with the center of the atomic target.
Selection rules are given and interesting implications and observables for the
above process are pointed out.

categories: quant-ph hep-ph physics.atom-ph physics.optics


title: Galaxy Cluster Bulk Flows and Collision Velocities in QUMOND

abstract:
  We examine the formation of clusters of galaxies in numerical simulations of
a QUMOND cosmogony with massive sterile neutrinos. Clusters formed in these
exploratory simulations develop higher velocities than those found in
{\Lambda}CDM simulations. The bulk motions of clusters attain about 1000 km/s
by low redshift, comparable to observations whereas {\Lambda}CDM simulated
clusters tend to fall short. Similarly, high pairwise velocities are common in
cluster-cluster collisions like the Bullet cluster. There is also a propensity
for the most massive clusters to be larger in QUMOND and to appear earlier than
in {\Lambda}CDM, potentially providing an explanation for 'pink elephants' like
El Gordo. However, it is not obvious that the cluster mass function can be
recovered.


title: The future of the Sun: an evolved solar twin revealed by CoRoT

abstract:
  The question of whether the Sun is peculiar within the class of solar-type
stars has been the subject of active investigation over the past three decades.
Although several solar twins have been found with stellar parameters similar to
those of the Sun (albeit in a range of Li abundances and with somewhat
different compositions), their rotation periods are unknown, except for 18 Sco,
which is younger than the Sun and with a rotation period shorter than solar. It
is difficult to obtain rotation periods for stars of solar age from
ground-based observations, as a low activity level imply a shallow rotational
modulation of their light curves. CoRoT has provided space-based long time
series from which the rotation periods of solar twins as old as the Sun could
be estimated. Based on high S/N high resolution spectroscopic observations
gathered at the Subaru Telescope, we show that the star CoRoT ID 102684698
(CoRoT Sol 1) is a somewhat evolved solar twin with a low Li abundance. Its
rotation period is 29 +- 5 days, compatible with its age (6.7 Gyr) and low
lithium content A(Li) < 0.85 dex. Interestingly, our CoRoT solar twin seems to
have enhanced abundances of the refractory elements with respect to the Sun, a
typical characteristic of most nearby twins. With a magnitude V ~14.1, ID
102684698 is the first solar twin revealed by CoRoT, the farthest field solar
twin so far known, and the only solar twin older than the Sun for which a
rotation period has been determined.


title: Particle Number and 3D Schroedinger Holography

abstract:
  We define a class of space-times that we call asymptotically locally
Schroedinger space-times. We consider these space-times in 3 dimensions, in
which case they are also known as null warped AdS. The boundary conditions are
formulated in terms of a specific frame field decomposition of the metric which
contains two parts: an asymptotically locally AdS metric and a product of a
lightlike frame field with itself. Asymptotically we say that the lightlike
frame field is proportional to the particle number generator N regardless of
whether N is an asymptotic Killing vector or not.
  We consider 3-dimensional AlSch space-times that are solutions of the massive
vector model. We show that there is no universal Fefferman-Graham (FG) type
expansion for the most general solution to the equations of motion. We show
that this is intimately connected with the special role played by particle
number. Fefferman-Graham type expansions are recovered if we supplement the
equations of motion with suitably chosen constraints. We consider three
examples. 1). The massive vector field is null everywhere. The solution in this
case is exact as the FG series terminates and has N as a null Killing vector.
2). N is a Killing vector (but not necessarily null). 3). N is null everywhere
(but not necessarily Killing). The latter case contains the first examples of
solutions that break particle number, either on the boundary directly or only
in the bulk. Finally, we comment on the implications for the problem of
holographic renormalization for asymptotically locally Schroedinger
space-times.


title: CMS Measurements of the Higgs-like Boson In the Two Photon Decay Channel

abstract:
  CMS reports on the recently updated, preliminary results with the full
datasets of 2011 and 2012 in the analysis of the Higgs-like Boson at 125 GeV.
Utilizing 5.1$fb^{-1}$ of 7 TeV data and 19.6$fb^{-1}$ of 8 TeV data, a signal
strength of $0.78^{+0.28}_{-0.26}$ times the Standard Model (SM) expectations
with a mass of $125.4\pm0.8$ GeV is observed. The significance of this
resonance with respect to the background only prediction is $3.2\sigma$. The
cut-based cross-check analysis observes signal strength of
$1.11^{+0.32}_{-0.30}$ times the SM expectations with a significance of
$3.9\sigma$ at 124.5 GeV.


title: Fighting against uncertainty: An essential issue in bioinformatics

abstract:
  Many bioinformatics problems, such as sequence alignment, gene prediction,
phylogenetic tree estimation and RNA secondary structure prediction, are often
affected by the "uncertainty" of a solution; that is, the probability of the
solution is extremely small. This situation arises for estimation problems on
high-dimensional discrete spaces in which the number of possible discrete
solutions is immense. In the analysis of biological data or the development of
prediction algorithms, this uncertainty should be handled carefully and
appropriately. In this review, I will explain several methods to combat this
uncertainty, presenting a number of examples in bioinformatics. The methods
include (i) avoiding point estimation, (ii) maximum expected accuracy (MEA)
estimations, and (iii) several strategies to design a pipeline involving
several prediction methods. I believe that the basic concepts and ideas
described in this review will be generally useful for estimation problems in
various areas of bioinformatics.


title:
Ultra compact dwarf galaxy formation by tidal stripping of nucleated
  dwarf galaxies

abstract:
  Ultra Compact Dwarf Galaxies (UCDs) and dwarf galaxy nuclei have many common
properties, such as internal velocity dispersions and colour-magnitude trends,
suggesting tidally stripped dwarf galaxies as a possible UCD origin. However,
UCDs typically have sizes more than twice as large as nuclei at the same
luminosity. We use a GPU-enabled version of the particle-mesh code
\textsc{superbox} to study the possibility of turning nucleated dwarf galaxies
into UCDs by tidally stripping them in a Virgo-like galaxy cluster. We find
that motion in spherical potentials, where close passages happen many times,
leads to the formation of compact ($r_h \lesssim 20$ pc) star clusters/UCDs. In
contrast, orbital motion where close passages happen only once or twice leads
to the formation of extended objects which are large enough to account for the
full range of observed UCD sizes. For such motion, we find that dwarf galaxies
need close pericentre passages with distances less than 10 kpc to undergo
strong enough stripping so that UCD formation is possible. As tidal stripping
produces objects with similar properties to UCDs, and our estimates suggest
dwarf galaxies have been destroyed in sufficient numbers to explain the
observed number of UCDs in M87, we consider tidal stripping to be a likely
origin of UCDs. However, comparison with cosmological simulations is needed to
determine if the number and spatial distribution of UCDs formed by tidal
stripping matches the observations of UCDs in galaxy clusters.


title:
Unstable Dynamics of Adaptation in Unknown Environment due to Novelty
  Seeking

abstract:
  Learning and adaptation play great role in emergent socio-economic phenomena.
Complex dynamics has been previously found in the systems of multiple learning
agents interacting via a simple game. Meanwhile, the single agent adaptation is
considered trivially stable. We advocate the idea that adopting a more complex
model of the individual behavior may result in a more diverse spectrum of
macro-level behaviors. We develop an adaptation model based on the
reinforcement learning framework extended by an additional processing channel.
We scrutiny the dynamics of the single agent adapting to the unknown
environment; the agent is biased by novelty seeking, the intrinsic inclination
for exploration. We demonstrate that the behavior of the novelty-seeking agent
may be inherently unstable. One of the surprising results is that under certain
conditions the increase of the novelty-seeking level may cause the agent to
switch from the non-rational to the strictly rational behavior. Our results
give evidence to the hypothesis that the intrinsic motives of agents should be
paid no less attention than the extrinsic ones in the models of complex
socio-economic systems.


title:
On the equivalence between Lurie's model and the dendroidal model for
  infinity-operads

abstract:
  We compare two approaches to the homotopy theory of infinity-operads. One of
them, the theory of dendroidal sets, is based on an extension of the theory of
simplicial sets and infinity-categories which replaces simplices by trees. The
other is based on a certain homotopy theory of marked simplicial sets over the
nerve of Segal's category Gamma. In this paper we prove that for operads
without constants these two theories are equivalent, in the precise sense of
the existence of a zig-zag of Quillen equivalences between the respective model
categories.


title: Pulsed Laser Interactions with Space Debris: Target Shape Effects

abstract:
  Among the approaches to the proposed mitigation and remediation of the space
debris problem is the de-orbiting of objects in low Earth orbit through
irradiation by ground-based high-intensity pulsed lasers. Laser ablation of a
thin surface layer causes target recoil, resulting in the depletion of orbital
angular momentum and accelerated atmospheric re-entry. However, both the
magnitude and direction of the recoil are shape dependent, a feature of the
laser-based remediation concept that has received little attention. Since the
development of a predictive capability is desirable, we have investigated the
dynamical response to ablation of objects comprising a variety of shapes. We
derive and demonstrate a simple analytical technique for calculating the
ablation-driven transfer of linear momentum, emphasizing cases for which the
recoil is not exclusively parallel to the incident beam. For the purposes of
comparison and contrast, we examine one case of momentum transfer in the
low-intensity regime, where photon pressure is the dominant momentum transfer
mechanism, showing that shape and orientation effects influence the target
response in a similar, but not identical, manner. We address the related
problem of target spin and, by way of a few simple examples, show how ablation
can alter the spin state of a target, which often has a pronounced effect on
the recoil dynamics.


title: Geometry and topology of CC and CQ states

abstract:
  We show that multipartite mixed bipartite CC and CQ states are geometrically
and topologically distinguished in the space of states. They are characterized
by non-vanishing Euler-Poincar\'{e} characteristics on the topological side and
by the existence of symplectic structure on the geometric side.


title:
Design and implementation of the NaI (Tl)CsI (Na) detectors output
  signal generator

abstract:
  We designed and implemented a signal generator that can simulate the output
of the NaI (Tl)CsI (Na) detectors pre amplifier onboard the Hard X ray
Modulation Telescope (HXMT). Using the development of FPGA (Field Programmable
Gate Array) with VHDL language and adding random constituent, we have finally
produced the double exponential random pulse signal generator. The statistical
distribution of signal amplitude is programmable. The occurrence time intervals
of adjacent signals content negative exponential distribution statistically.


title:
Null structure in a system of quadratic derivative nonlinear
  Schr\"odinger equations

abstract:
  We consider the initial value problem for a three-component system of
quadratic derivative nonlinear Schr\"odinger equations in two space dimensions
with the masses satisfying the resonance relation. We present a structural
condition on the nonlinearity under which small data global existence holds. It
is also shown that the solution is asymptotically free. Our proof is based on
the commuting vector field method combined with smoothing effects.


title: Pseudoscopic Imaging by Means of a Holographic Screen

abstract:
  Pseudoscopic enlarged images are obtained by projecting diffraction-encoded
images onto a diffractive screen


title: Quantum Operations: technical or fundamental challenge?

abstract:
  A class of unitary operations generated by idealized, semiclassical fields is
studied. The operations implemented by sharp potential kicks are revisited and
the possibility of performing them by softly varying external fields is
examined.
  The possibility of using the ion traps as 'operation factories' transforming
quantum states is discussed. The non-perturbative algorithms indicate that the
results of abstract $\delta$-pulses of oscillator potentials can become real.
Some of them, if empirically achieved, could be essential to examine certain
atypical quantum ideas. In particular, simple dynamical manipulations might
contribute to the Aharonov-Bohm criticism of the time-energy uncertainty
principle, some other, to verify the existence of fundamental precision limits
of the position measurements or the reality of `non-commutative geometries'.


title:
A Composite Genome Approach to Identify Phylogenetically Informative
  Data from Next-Generation Sequencing

abstract:
  We have developed a novel method to rapidly obtain homologous genomic data
for phylogenetics directly from next-generation sequencing reads without the
use of a reference genome. This software, called SISRS, avoids the time
consuming steps of de novo whole genome assembly, genome-genome alignment, and
annotation. For simulations SISRS is able to identify large numbers of loci
containing variable sites with phylogenetic signal. For genomic data from apes,
SISRS identified thousands of variable sites, from which we produced an
accurate phylogeny. Finally, we used SISRS to identify phylogenetic markers
that we used to estimate the phylogeny of placental mammals. We recovered
phylogenies from multiple datasets that were consistent with previous
conflicting estimates of the relationships among mammals. SISRS is open source
and freely available at https://github.com/rachelss/SISRS.


title:
Weighted ergodic theorem for contractions of Orlicz-Kantorovich lattice
  $L_{M}(\hat{\nabla},\hat{\mu}$

abstract:
  In the present paper we prove Besocovich weighted ergodic theorem for
positive contractions acting on Orlich-Kantorovich space. Our main tool is the
use of methods of measurable bundles of Banach-Kantorovich lattices.


title: Nature vs. Nurture: Predictability in Low-Temperature Ising Dynamics

abstract:
  Consider a dynamical many-body system with a random initial state
subsequently evolving through stochastic dynamics. What is the relative
importance of the initial state ("nature") vs. the realization of the
stochastic dynamics ("nurture") in predicting the final state? We examined this
question for the two-dimensional Ising ferromagnet following an initial deep
quench from $T=\infty$ to $T=0$. We performed Monte Carlo studies on the
overlap between "identical twins" raised in independent dynamical environments,
up to size $L=500$. Our results suggest an overlap decaying with time as
$t^{-\theta_h}$ with $\theta_h = 0.22 \pm 0.02$; the same exponent holds for a
quench to low but nonzero temperature. This "heritability exponent" may equal
the persistence exponent for the 2D Ising ferromagnet, but the two differ more
generally.


title:
Mining for Geographically Disperse Communities in Social Networks by
  Leveraging Distance Modularity

abstract:
  Social networks where the actors occupy geospatial locations are prevalent in
military, intelligence, and policing operations such as counter-terrorism,
counter-insurgency, and combating organized crime. These networks are often
derived from a variety of intelligence sources. The discovery of communities
that are geographically disperse stems from the requirement to identify
higher-level organizational structures, such as a logistics group that provides
support to various geographically disperse terrorist cells. We apply a variant
of Newman-Girvan modularity to this problem known as distance modularity. To
address the problem of finding geographically disperse communities, we modify
the well-known Louvain algorithm to find partitions of networks that provide
near-optimal solutions to this quantity. We apply this algorithm to numerous
samples from two real-world social networks and a terrorism network data set
whose nodes have associated geospatial locations. Our experiments show this to
be an effective approach and highlight various practical considerations when
applying the algorithm to distance modularity maximization. Several military,
intelligence, and law-enforcement organizations are working with us to further
test and field software for this emerging application.


title:
Stellar population gradients and spatially resolved kinematics in
  luminous post-starburst galaxies

abstract:
  We have used deep integral field spectroscopy obtained with the GMOS
instrument on Gemini-North to determine the spatial distribution of the
post-starburst stellar population in four luminous E+A galaxies at z<0.04. We
find all four galaxies have centrally-concentrated gradients in the young
stellar population contained within the central ~1 kpc. This is in agreement
with the Balmer line gradients found in local low luminosity E+A galaxies. The
results from higher redshift (z~0.1) samples of luminous E+A galaxies have been
varied, but in general have found the post-starburst signature to be extended
or a galaxy-wide phenomenon or have otherwise failed to detect gradients in the
stellar populations. The ubiquity of the detection of a centrally concentrated
young stellar population in local samples, and the presence of significant
radial gradients in the stellar populations when the E+A galaxy core is well
resolved raises the possibility that spatial resolution issues may be important
in interpreting the higher redshift results. The two early type E+A galaxies in
our sample that can be robustly kinematically classified, using the LambdaR
parameter, are fast-rotators. Combined with previous measurements, this brings
the total number of E+A galaxies with measurements of LambdaR to twenty-six,
with only four being classified as slow-rotators. This fraction is similar to
the fraction of the early-type population as a whole and argues against the
need for major mergers in the production of E+A galaxies, since major mergers
should result in an increased fraction of slow rotators.


title: Viscosity and dissipative hydrodynamics from effective field theory

abstract:
  With the goal of deriving dissipative hydrodynamics from an action, we study
classical actions for open systems, which follow from the generic structure of
effective actions in the Schwinger-Keldysh Closed-Time-Path formalism with two
time axes and a doubling of degrees of freedom. The central structural feature
of such effective actions is the coupling between degrees of freedom on the two
time axes. This reflects the fact that from an effective field theory point of
view, dissipation is the loss of energy of the low-energy hydrodynamical
degrees of freedom to the integrated-out, UV degrees of freedom of the
environment. The dynamics of only the hydrodynamical modes may therefore not
posses a conserved stress-energy tensor. After a general discussion of the CTP
effective actions, we use the variational principle to derive the
energy-momentum balance equation for a dissipative fluid from an effective
Goldstone action of the long-range hydrodynamical modes. Despite the absence of
conserved energy and momentum, we show that we can construct the first-order
dissipative stress-energy tensor and derive the Navier-Stokes equations near
hydrodynamical equilibrium. The shear viscosity is shown to vanish in the
classical theory under consideration, while the bulk viscosity is determined by
the form of the effective action. We also discuss the thermodynamics of the
system and analyse the entropy production.

categories: hep-th astro-ph.CO hep-ph nucl-th physics.flu-dyn


title: Sparse Adaptive Dirichlet-Multinomial-like Processes

abstract:
  Online estimation and modelling of i.i.d. data for short sequences over large
or complex "alphabets" is a ubiquitous (sub)problem in machine learning,
information theory, data compression, statistical language processing, and
document analysis. The Dirichlet-Multinomial distribution (also called Polya
urn scheme) and extensions thereof are widely applied for online i.i.d.
estimation. Good a-priori choices for the parameters in this regime are
difficult to obtain though. I derive an optimal adaptive choice for the main
parameter via tight, data-dependent redundancy bounds for a related model. The
1-line recommendation is to set the 'total mass' = 'precision' =
'concentration' parameter to m/2ln[(n+1)/m], where n is the (past) sample size
and m the number of different symbols observed (so far). The resulting
estimator (i) is simple, (ii) online, (iii) fast, (iv) performs well for all m,
small, middle and large, (v) is independent of the base alphabet size, (vi)
non-occurring symbols induce no redundancy, (vii) the constant sequence has
constant redundancy, (viii) symbols that appear only finitely often have
bounded/constant contribution to the redundancy, (ix) is competitive with
(slow) Bayesian mixing over all sub-alphabets.


title: Restriction on the rank of marginals of bipartite pure states

abstract:
  Consider a qubit-qutrit ($2 \times 3$) composite state space. Let
$C(\{1}{2}I_2, \{1}{3}I_3)$ be a convex set of all possible states of composite
system whose marginals are given by $\{1}{2}I_2$ and $\{1}{3}I_3$ in two and
three dimensional spaces respectively. We prove that there exists no pure state
in $C(\{1}{2}I_2, \{1}{3}I_3)$. Further we generalize this result to an
arbitrary $m \times n$ bipartite systems. We prove that for $m < n$, no pure
state exists in the convex set $C(\rho_A,\rho_B)$, for an arbitrary $\rho_A$
and rank of $\rho_B >m$.


title:
Experimental demonstration of continuous electronic structure tuning via
  strain in atomically thin MoS2

abstract:
  We demonstrate the continuous tuning of the electronic structure of
atomically thin MoS2 on flexible substrates by applying a uniaxial tensile
strain. A redshift at a rate of ~70 meV per percent applied strain for direct
gap transitions, and at a rate 1.6 times larger for indirect gap transitions,
have been determined by absorption and photoluminescence spectroscopy. Our
result, in excellent agreement with first principles calculations, demonstrates
the potential of twodimensional crystals for applications in flexible
electronics and optoelectronics.


title: The toroidal Hausdorff dimension of 2d Euclidean quantum gravity

abstract:
  The lengths of shortest non-contractible loops are studied numerically in 2d
Euclidean quantum gravity on a torus coupled to conformal field theories with
central charge less than one. We find that the distribution of these geodesic
lengths displays a scaling in agreement with a Hausdorff dimension given by the
formula of Y. Watabiki.


title:
Spin and parity in the \boldmath{$WH \rightarrow \ell \nu b\bar{b}$}
  channel at the D0 experiment

abstract:
  We probe the spin ($J$) and parity ($P$) of the Standard Model Scalar (SMS)
using existing searches sensitive to its production rate and kinematic
properties. In particular, we search for the SMS decaying to a pair of
$b$-quarks produced in association with a $W$ boson decaying leptonically. By
exploiting the differences in kinematic observables, namely the transverse mass
of the final state products ($M_{T}$), we attempt to distinguish between three
possible $J^{P}$ hypotheses: the standard model prediction (\jpzp), a
pseudoscalar (\jpzm), and a graviton-like particle (\jptp). With 9.7 fb$^{-1}$
of data collected at the D0 experiment we show the expected sensitivity to
different spin and parity hypotheses.


title: A frequency determination method for digitized NMR signals

abstract:
  We present a high precision frequency determination method for digitized NMR
FID signals. The method employs high precision numerical integration rather
than simple summation as in many other techniques. With no independent
knowledge of the other parameters of a NMR FID signal (phase $\phi$, amplitude
$A$, and transverse relaxation time $T_{2}$) this method can determine the
signal frequency $f_{0}$ with a precision of $1/(8\pi^{2}f_{0}^{2}T_{2}^{2})$
if the observation time $T$ is long enough. The method is especially convenient
when the detailed shape of the observed FT NMR spectrum is not well defined.
When $T_{2}$ is $+\infty$ and the signal becomes pure sinusoidal, the precision
of the method is $3/(2\pi^{2}f_{0}^{2}T^{2})$ which is one order more precise
than a typical frequency counter. Analysis of this method shows that the
integration reduces the noise by bandwidth narrowing as in a lock-in amplifier,
and no extra signal filters are needed. For a pure sinusoidal signal we find
from numerical simulations that the noise-induced error in this method reaches
the Cramer-Rao Lower Band(CRLB) on frequency determination. For the damped
sinusoidal case of most interest, the noise-induced error is found to be within
a factor of 2 of CRLB when the measurement time $T$ is a few times larger than
$T_{2}$.We discuss possible improvements for the precision of this method.


title: Quillen superconnections and connections on supermanifolds

abstract:
  Given a supervector bundle $E = E_0\oplus E_1 \to M$, we exhibit a
parametrization of Quillen superconnections on $E$ by graded connections on the
Cartan-Koszul supermanifold $(M;\Omega (M))$. The relation between the
curvatures of both kind of connections, and their associated Chern classes, is
discussed in detail. In particular, we find that Chern classes for graded
vector bundles on split supermanifolds can be computed through the associated
Quillen superconnections.


title: Fulde-Ferrell-Larkin-Ovchinnikov States in Two-Band Superconductors

abstract:
  We examine the possible phase diagram in an $H$-$T$ plane for
Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states in a two-band Pauli-limiting
superconductor. We here demonstrate that, as a result of the competition of two
different modulation length scales, the FFLO phase is divided into two phases
by the first-order transition: the $Q_1$- and $Q_2$-FFLO phases at the higher
and lower fields. The $Q_2$-FFLO phase is further divided by successive first
order transitions into an infinite family of FFLO subphases with rational
modulation vectors, forming a {\it devil's staircase structure} for the field
dependences of the modulation vector and paramagnetic moment. The critical
magnetic field above which the FFLO is stabilized is lower than that in a
single-band superconductor. However, the tricritical Lifshitz point $L$ at
$T_{\rm L}$ is invariant under two-band parameter changes.


title: Kepler Observations of Very Low-Mass Stars

abstract:
  Observations of very low-mass stars with Kepler represent an excellent
opportunity to search for planetary transits and to characterize optical
photometric variability at the cool end of the stellar mass distribution. In
this paper, we present low-resolution red optical spectra that allow us to
identify 18 very low-mass stars that have Kepler light curves available in the
public archive. Spectral types of these targets are found to lie in the range
dM4.5--dM8.5, implying spectrophotometric distances from 17 pc to 80 pc. Limits
to the presence of transiting planets are placed from modelling of the Kepler
light curves. We find that the size of the planets detectable by Kepler around
these small stars typically lie in the range 1 to 5 Earth radii within the
habitable regions (P$\le$10 days). We identify one candidate transit with a
period of 1.26 days that resembles the signal produced by a planet slightly
smaller than the Moon. However, our pixel by pixel analysis of the Kepler data
shows that the signal most likely arises from a background contaminating
eclipsing binary. For 11 of these objects reliable photometric periods shorter
than 7 days are derived, and are interpreted as rotational modulation of
magnetic cool spots. For 3 objects we find possible photometric periods longer
than 50 days that require confirmation. H$_\alpha$ emission measurements and
flare rates are used as a proxies for chromospheric activity and transversal
velocities are used as an indicator of dynamical ages. These data allow us to
discuss the relationship between magnetic activity and detectability of
planetary transits around very low-mass stars. We show that Super-Earth planets
with sizes around 2 Earth radii are detectable with Kepler around about two
thirds of the stars in our sample, independently from their level of
chromospheric activity.


title: (0,2) Chiral Liouville Field Theory

abstract:
  As an existence proof of the (0,2) heterotic supercurrent supermultiplets in
(1+1) dimensional quantum field theories which are consistent with the warped
superconformal algebra, we construct the (0,2) chiral Liouville field theories.
The two distinct possibilities of the heterotic supercurrent supermultiplets
are both realized.


title:
Gas kinematics and the Dragged Magnetic Field in the High-mass Molecular
  Outflow Source G192.16$-$3.84: An SMA View

abstract:
  We report the Submillimeter Array (SMA) observations of the polarized
0.88\,mm thermal dust emission and various molecular line transitions toward
the early B-type ($L_{*}\sim2\times10^{3}L_{\odot}$) star-forming region
G192.16$-$3.84 (IRAS 05553+1631). The peak of the continuum Stokes-I emission
coincides with a hot rotating disk/envelope (SO$_{2}$ rotational temperature
T$_{rot}^{SO_{2}}$$\sim84^{+18}_{-13}$\,K), with a north-south velocity
gradient. Joint analysis of the rotation curve traced by HCO$^{+}$ 4-3 and
SO$_{2}$ 19$_{1,19}-18_{0,18}$ suggests that the dense molecular gas is
undergoing a spinning-up rotation, marginally bound by the gravitational force
of \textbf{an} enclosed mass $M_{*+gas+dust}\sim$11.2-25.2\,$M_{\odot}$.
Perpendicular to the rotational plane a $\gtrsim100/\cos(i)$\,km\,s$^{-1}$
($i\sim63^{\circ}$) high velocity molecular jet, and the
$\sim$15-20\,km\,s$^{-1}$ expanding biconical cavity were revealed in the CO
3-2 emission. The polarization percentage of the 0.88\,mm continuum emission
decreases toward the central rotating disk/envelope. The polarization angle in
the inner $\sim2"$ (0.015\,pc) disk/envelope is perpendicular to the plane of
the rotation. The magnetic field lines, which are predominantly in the toroidal
direction along the disk plane, are likely to be dragged by the gravitationally
accelerated rotation.


title: Energy of tori of revolution

abstract:
  We show that the surface energy introduced by Auckly and Sadun attains the
minimum value at the Clifford torus among tori of revolution.


title:
Invariant characterization of the growing and decaying density modes in
  LTB dust models

abstract:
  We obtain covariant expressions that generalize the growing and decaying
density modes of linear perturbation theory of dust sources by means of the
exact density perturbation from the formalism of quasi--local scalars
associated to weighed proper volume averages in LTB dust models. The relation
between these density modes and theoretical properties of generic LTB models is
thoroughly studied by looking at the evolution of the models through a
dynamical system whose phase space is parametrized by variables directly
related to the modes themselves. The conditions for absence of shell crossings,
as well as sign conditions on the modes, become interrelated fluid flow
preserved constraints that define phase space invariant subspaces. In the
general case (both density modes being nonzero) the evolution of phase space
trajectories exhibits the expected dominance of the decaying/growing in the
early/late evolution times defined by past/future attractors characterized by
asymptotic density inhomogeneity. In particular, the growing mode is also
dominant for collapsing layers that terminate in a future attractor associated
with a "Big Crunch" singularity, which is qualitatively different from the past
attractor marking the "Big Bang". Suppression of the decaying mode modifies the
early time evolution, with phase space trajectories emerging from an
Einstein--de Sitter past attractor associated with homogeneous conditions.
Suppression of the growing mode modifies the late time evolution as phase space
trajectories terminate in future attractors associated with homogeneous states.
General results are obtained relating the signs of the density modes and the
type of asymptotic density profile (clump or void). A critical review is given
of previous attempts in the literature to define these density modes for LTB
models.


title: Interplay between edge and bulk states in silicene nanoribbon

abstract:
  We investigate the interplay between the edge and bulk states, induced by the
Rashba spin-orbit coupling, in a zigzag silicene nanoribbon in the presence of
an external electric field. The interplay can be divided into two kinds, one is
the interplay between the edge and bulk states with opposite velocities, and
the other is that with the same velocity direction. The former can open small
direct spin-dependent subgaps. A spin-polarized current can be generated in the
nanoribbon as the Fermi energy is in the subgaps. While the later can give rise
to the spin precession in the nanoribbon. Therefore, the zigzag silicene
nanoribbon can be used as an efficient spin filter and spin modulation device.


title:
Multiplicity of positive solutions of nonlinear Schr\"odinger
  \'equations concentrating at a potential well

abstract:
  We consider singularly perturbed nonlinear Schr\"odinger equations \be
\label{eq:0.1} - \varepsilon^2 \Delta u + V(x)u = f(u), \ \ u > 0, \ \ v \in
H^1(\R^N) \ee where $V \in C(\R^N, \R)$ and $f$ is a nonlinear term which
satisfies the so-called Berestycki-Lions conditions. We assume that there
exists a bounded domain $\Omega \subset \R^N$ such that \[m_0 \equiv \inf_{x
\in \Omega} V(x) < \inf_{x \in \partial \Omega} V(x) \] and we set $K = \{x \in
\Omega \ | \ V(x) = m_0\}$. For $\e >0$ small we prove the existence of at
least ${\cuplength}(K) + 1$ solutions to (\ref{eq:0.1}) concentrating, as $\e
\to 0$ around $K$. We remark that, under our assumptions of $f$, the search of
solutions to (\ref{eq:0.1}) cannot be reduced to the study of the critical
points of a functional restricted to a Nehari manifold.


title:
Size-dependent magnetization switching characteristics and spin wave
  modes of FePt nanostructures

abstract:
  We present a comprehensive investigation of the size-dependent switching
characteristics and spin wave modes of FePt nanoelements. Curved nanomagnets
("caps") are compared to flat disks of identical diameter and volume over a
size range of 100 to 300nm. Quasi-static magnetization reversal analysis using
first-order reversal curves (FORC) shows that spherical caps have lower vortex
nucleation and annihilation fields than the flat disks. As the element diameter
decreases, the reversal mechanism in the caps crosses over sooner to coherent
rotation than in the disks. The magnetization dynamics are studied using
optically induced small angle precession and reveal a strong size dependence
that differs for the two shapes. Flat disks exhibit well-known center and edge
modes at all sizes, but as the diameter of the caps increases from 100 to 300
nm, additional oscillation modes appear in agreement with dynamic micromagnetic
simulations. In addition, we show that the three-dimensional curvature of the
cap causes a much greater sensitivity to the applied field angle which provides
an additional way for controlling the ultrafast response of nanomagnetic
elements.


title: Spatial resolution of a {\mu}PIC-based neutron imaging detector

abstract:
  We present a detailed study of the spatial resolution of our time-resolved
neutron imaging detector utilizing a new neutron position reconstruction method
that improves both spatial resolution and event reconstruction efficiency. Our
prototype detector system, employing a micro-pattern gaseous detector known as
the micro-pixel chamber ({\mu}PIC) coupled with a
field-programmable-gate-array-based data acquisition system, combines
100{\mu}m-level spatial and sub-{\mu}s time resolutions with excellent gamma
rejection and high data rates, making it well suited for applications in
neutron radiography at high-intensity, pulsed neutron sources. From data taken
at the Materials and Life Science Experimental Facility within the Japan Proton
Accelerator Research Complex (J-PARC), the spatial resolution was found to be
approximately Gaussian with a sigma of 103.48 +/- 0.77 {\mu}m (after correcting
for beam divergence). This is a significant improvement over that achievable
with our previous reconstruction method (334 +/- 13 {\mu}m), and compares well
with conventional neutron imaging detectors and with other high-rate detectors
currently under development. Further, a detector simulation indicates that a
spatial resolution of less than 60 {\mu}m may be possible with optimization of
the gas characteristics and {\mu}PIC structure. We also present an example of
imaging combined with neutron resonance absorption spectroscopy.

categories: physics.ins-det cond-mat.mtrl-sci hep-ex nucl-ex


title: The Thinnest Path Problem

abstract:
  We formulate and study the thinnest path problem in wireless ad hoc networks.
The objective is to find a path from a source to its destination that results
in the minimum number of nodes overhearing the message by a judicious choice of
relaying nodes and their corresponding transmission power. We adopt a directed
hypergraph model of the problem and establish the NP-completeness of the
problem in 2-D networks. We then develop two polynomial-time approximation
algorithms that offer $\sqrt{\frac{n}{2}}$ and $\frac{n}{2\sqrt{n-1}}$
approximation ratios for general directed hypergraphs (which can model
non-isomorphic signal propagation in space) and constant approximation ratios
for ring hypergraphs (which result from isomorphic signal propagation). We also
consider the thinnest path problem in 1-D networks and 1-D networks embedded in
2-D field of eavesdroppers with arbitrary unknown locations (the so-called
1.5-D networks). We propose a linear-complexity algorithm based on nested
backward induction that obtains the optimal solution to both 1-D and 1.5-D
networks. This algorithm does not require the knowledge of eavesdropper
locations and achieves the best performance offered by any algorithm that
assumes complete location information of the eavesdroppers.


title: On the magnetization of gamma-ray burst blast waves

abstract:
  The origin of magnetic fields that permeate the blast waves of gamma-ray
bursts (GRBs) is a long-standing problem. The present paper argues that in four
GRBs revealing extended emission at >100 MeV, with follow-up in the radio,
optical and X-ray domains at later times, this magnetization can be described
as the partial decay of the micro-turbulence that is generated in the shock
precursor. Assuming that the bulk of the extended emission >100 MeV can be
interpreted as synchrotron emission of shock accelerated electrons, we model
the multi-wavelength light curves of GRB 090902B, GRB 090323, GRB 090328 and
GRB 110731A, using a simplified then a full synchrotron calculation with
power-law-decaying microturbulence \epsilon_B \propto t^{\alpha_t} (t denotes
the time since injection through the shock, in the comoving blast frame). We
find that these models point to a consistent value of the decay exponent -0.5 <
\alpha_t < -0.4.


title: BSDEs under partial information and financial applications

abstract:
  In this paper we provide existence and uniqueness results for the solution of
BSDEs driven by a general square integrable martingale under partial
information. We discuss some special cases where the solution to a BSDE under
restricted information can be derived by that related to a problem of a BSDE
under full information. In particular, we provide a suitable version of the
F\"ollmer-Schweizer decomposition of a square integrable random variable
working under partial information and we use this achievement to investigate
the local risk-minimization approach for a semimartingale financial market
model.


title:
In silico investigation of lactone and thiolactone inhibitors in
  bacterial quorum sensing using molecular modeling

abstract:
  In the present study, the origin of the anti-quorum sensing (QS) activities
of several members of a recently synthesized and in vitro tested class of
lactone and thiolactone based inhibitors were computationally investigated.
Docking and molecular dynamic (MD) simulations and binding free energy
calculations were carried out to reveal the exact binding and inhibitory
profiles of these compounds. The higher in vitro activity of the lactone series
relative to their thiolactone isosteres was verified based on estimating the
binding energies, the docking scores and monitoring the stability of the
complexes produced in the MD simulations. The strong electrostatic contribution
to the binding energies may be responsible for the higher inhibitory activity
of the lactone with respect to the thiolactone series. The results of this
study help to understand the anti-QS properties of lactone-based inhibitors and
provide important information that may assist in the synthesis of novel QS
inhibitors.


title: Point estimates in phylogenetic reconstructions

abstract:
  Motivation: The construction of statistics for summarizing posterior samples
returned by a Bayesian phylogenetic study has so far been hindered by the poor
geometric insights available into the space of phylogenetic trees, and ad hoc
methods such as the derivation of a consensus tree makeup for the
ill-definition of the usual concepts of posterior mean, while bootstrap methods
mitigate the absence of a sound concept of variance. Yielding satisfactory
results with sufficiently concentrated posterior distributions, such methods
fall short of providing a faithful summary of posterior distributions if the
data do not offer compelling evidence for a single topology.
  Results: Building upon previous work of Billera et al., summary statistics
such as sample mean, median and variance are defined as the geometric median,
Fr\'echet mean and variance, respectively. Their computation is enabled by
recently published works, and embeds an algorithm for computing shortest paths
in the space of trees. Studying the phylogeny of a set of plants, where several
tree topologies occur in the posterior sample, the posterior mean balances
correctly the contributions from the different topologies, where a consensus
tree would be biased. Comparisons of the posterior mean, median and consensus
trees with the ground truth using simulated data also reveals the benefits of a
sound averaging method when reconstructing phylogenetic trees.


title:
p-adic Eisenstein-Kronecker series and non-critical values of p-adic
  Hecke L-functions of an Imaginary Quadratic Field when the conductor is
  divisible by p

abstract:
  We relate non-critical special values $p$-adic $L$-functions associated to
algebraic Hecke characters of an imaginary quadratic number field with class
number one to $p$-adic Coleman function called the $p$-adic
Eisenstein-Kronecker series, when the conductors of the algebraic Hecke
characters are divisible by $p$.


title:
Coverage and Throughput Analysis with a Non-Uniform Small Cell
  Deployment

abstract:
  Small cell network (SCN) offers, for the first time, a low-cost and scalable
mechanism to meet the forecast data-traffic demand. In this paper, we propose a
non-uniform SCN deployment scheme. The small cell base stations (BSs) in this
scheme will not be utilized in the region within a prescribed distance away
from any macrocell BSs, defined as the inner region. Based upon the analytical
framework provided in this work, the downlink coverage and single user
throughput are precisely characterized. Provided that the inner region size is
appropriately chosen, we find that the proposed non-uniform SCN deployment
scheme can maintain the same level of cellular coverage performance even with
50% less small cell BSs used than the uniform SCN deployment, which is commonly
considered in the literature. Furthermore, both the coverage and the single
user throughput performance will significantly benefit from the proposed
scheme, if its average small cell density is kept identical to the uniform SCN
deployment. This work demonstrates the benefits obtained from a simple
non-uniform SCN deployment, thus highlighting the importance of deploying small
cells selectively.


title: Top Quark Production at the LHC

abstract:
  Measurements of the production cross section for top quark pairs and the
single top quark by the ATLAS and CMS collaborations at the LHC are presented.
Improved measurements at sqrt(s)=7 TeV as well as new measurements at sqrt(s)=8
TeV are highlighted. All the measurements are in good agreement with the
standard model predictions.


title:
Wind speed forecasting at different time scales: a non parametric
  approach

abstract:
  The prediction of wind speed is one of the most important aspects when
dealing with renewable energy. In this paper we show a new nonparametric model,
based on semi-Markov chains, to predict wind speed. Particularly we use an
indexed semi-Markov model, that reproduces accurately the statistical behavior
of wind speed, to forecast wind speed one step ahead for different time scales
and for very long time horizon maintaining the goodness of prediction. In order
to check the main features of the model we show, as indicator of goodness, the
root mean square error between real data and predicted ones and we compare our
forecasting results with those of a persistence model.


title: Random Latin squares and Sudoku designs generation

abstract:
  Uniform random generation of Latin squares is a classical problem. In this
paper we prove that both Latin squares and Sudoku designs are maximum cliques
of properly defined graphs. We have developed a simple algorithm for uniform
random sampling of Latin squares and Sudoku designs. It makes use of recent
tools for graph analysis. The corresponding SAS code is annexed.


title: Embedding Factors for Branching in Hermitian Clifford Analysis

abstract:
  A step 2 branching decomposition of spaces of homogeneous Hermitian monogenic
polynomials in C^n is established with explicit embedding factors in terms of
the generalized Jacobi polynomials, which allows for an inductive construction
of an orthogonal basis for those spaces. The embedding factors and the
orthogonal bases are fully worked out in the complex dimension 2 case, with
special interest for the Appell property.


title: Secrets from the GPU

abstract:
  Acceleration of cryptographic applications on massively parallel computing
platforms, such as Graphics Processing Units (GPUs), becomes a real challenge
as their decreasing cost and mass production makes practical implementations
attractive. We propose a layered trusted architecture integrating random bits
generation and parallelized RSA cryptographic computations on such platforms.
The GPU-resident, three-tier, MR architecture consists of a RBG, using the GPU
as a deep entropy pool; a bignum modular arithmetic library using the Residue
Number System; and GPU APIs for RSA key generation, encryption and decryption.
Evaluation results of an experimental OpenCL implementation show a 32-40 GB/s
throughput of random integers, and encryptions with up to 16,128-bit long
exponents on a commercial mid-range GPUs. This suggests an ubiquitous solution
for autonomous trusted architectures combining low cost and high throughput.


title: New classes of quadratic bent functions in polynomial forms

abstract:
  In this paper, we propose a new construction of quadratic bent functions in
polynomial forms. Right Euclid algorithm in skew-polynomial rings over finite
fields of characteristic 2 is applied in the proof.


title: Distances to Dwarf Galaxies of the Canes Venatici I Cloud

abstract:
  We determined the spatial structure of the scattered concentration of
galaxies in the Canes Venatici constellation. We redefined the distances for 30
galaxies of this region using the deep images from the Hubble Space Telescope
archive with the WFPC2 and ACS cameras. We carried out a high-precision stellar
photometry of the resolved stars in these galaxies, and determined the
photometric distances by the tip of the red giant branch (TRGB) using an
advanced technique and modern calibrations. High accuracy of the results allows
us to distinguish the zone of chaotic motions around the center of the system.
A group of galaxies around M94 is characterized by the median velocity VLG=287
km/s, distance D=4.28 Mpc, internal velocity dispersion sigma=51 km/s and total
luminosity LB=1.61x10^10 Lo. The projection mass of the system amounts to
Mp=2.56x10^12 Mo, which corresponds to the mass-luminosity ratio of (M/L)p=159
(M/L)o. The estimate of the mass-luminosity ratio is significantly higher than
the typical ratio M/LB ~30 for the nearby groups of galaxies. The CVnI cloud of
galaxies contains 4-5 times less luminous matter compared with the well-known
nearby groups, like the Local Group, M81 and Centaurus A. The central galaxy
M94 is at least 1 mag fainter than any other central galaxy of these groups.
However, the concentration of galaxies in the Canes Venatici may have a
comparable total mass.


title:
Fermion mass mixing and vacuum triviality in the renormalization group
  procedure for effective particles

abstract:
  Renormalization group procedure for effective particles is applied to the
model quantum theory of free fermions to which one adds an interaction in the
form of a mass mixing term. If one used a standard approach based on the
instant form of dynamics, the theory would suffer from a generic vacuum problem
caused by a divergent production of virtual quanta out of a bare vacuum and it
would require an adjustment of its degrees of freedom to the added interaction
term before quantization, considered a means of avoiding the quantum vacuum
problem. In the effective particle approach, the quantum vacuum problem is
dealt with instead by using the front form of dynamics, where the pair
production is excluded by momentum conservation. The corresponding Hamiltonian
includes mass parameters through constraint equations while the required
quantum field operators are constructed independently of all mass parameters,
including the parameters that appear in the added mass mixing interaction term.
Then the masses and states of physical fermions emerge at an end of the
non-perturbative calculation that is carried out entirely in one and the same
interacting quantum theory with a trivial vacuum and no quantization
adjustment. An a priori infinite set of renormalization group equations for all
momentum modes of fermion fields is reduced to just one equation for a
two-by-two mass squared matrix, thanks to 7 kinematical symmetries of the front
form (the instant form has only 6). For strong mass mixing interactions, the
fermion model solutions qualitatively differ from the analogous, earlier found
boson model solutions by the absence of tachyons.


title: Quintessence with Hybrid Potential

abstract:
  I present the numerical solution of equations of the evolution of a universe
containing background fluids (radiation, dark matter and baryonic matter), plus
a scalar matter field with a hybrid potential that is a combination of
exponential potential and power-law potential. The plot of the evolution of
density parameters is compatible with our universe; and today's values of
density parameters of dark energy, dark matter, baryonic matter, and Hubble
parameter, and the age and size of our universe, found from this model, are
very close to (and some times the same as) measured values.


title: A survey on cosymplectic geometry

abstract:
  We give an up-to-date overview of geometric and topological properties of
cosymplectic and coKaehler manifolds. We also mention some of their
applications to time-dependent mechanics.


title:
Time persistency of floating particle clusters in free-surface
  turbulence

abstract:
  We study the dispersion of light particles floating on a flat shear-free
surface of an open channel in which the flow is turbulent. This configuration
mimics the motion of buoyant matter (e.g. phytoplankton, pollutants or
nutrients) in water bodies when surface waves and ripples are smooth or absent.
We perform direct numerical simulation of turbulence coupled with Lagrangian
particle tracking, considering different values of the shear Reynolds number
(Re{\tau} = 171 and 509) and of the Stokes number (0.06 < St < 1 in viscous
units). Results show that particle buoyancy induces clusters that evolve
towards a long-term fractal distribution in a time much longer than the
Lagrangian integral fluid time scale, indicating that such clusters over-live
the surface turbulent structures which produced them. We quantify cluster
dynamics, crucial when modeling dispersion in free-surface flow turbulence, via
the time evolution of the cluster correlation dimension.


title: Cut-Set Bounds on Network Information Flow

abstract:
  Explicit characterization of the capacity region of communication networks is
a long standing problem. While it is known that network coding can outperform
routing and replication, the set of feasible rates is not known in general.
Characterizing the network coding capacity region requires determination of the
set of all entropic vectors. Furthermore, computing the explicitly known linear
programming bound is infeasible in practice due to an exponential growth in
complexity as a function of network size. This paper focuses on the fundamental
problems of characterization and computation of outer bounds for networks with
correlated sources. Starting from the known local functional dependencies
induced by the communications network, we introduce the notion of irreducible
sets, which characterize implied functional dependencies. We provide recursions
for computation of all maximal irreducible sets. These sets act as
information-theoretic bottlenecks, and provide an easily computable outer
bound. We extend the notion of irreducible sets (and resulting outer bound) for
networks with independent sources. We compare our bounds with existing bounds
in the literature. We find that our new bounds are the best among the known
graph theoretic bounds for networks with correlated sources and for networks
with independent sources.


title:
On a continuation approach in Tikhonov regularization and its
  application in piecewise-constant parameter identification

abstract:
  We present a new approach to convexification of the Tikhonov regularization
using a continuation method strategy. We embed the original minimization
problem into a one-parameter family of minimization problems. Both the penalty
term and the minimizer of the Tikhonov functional become dependent on a
continuation parameter.
  In this way we can independently treat two main roles of the regularization
term, which are stabilization of the ill-posed problem and introduction of the
a priori knowledge. For zero continuation parameter we solve a relaxed
regularization problem, which stabilizes the ill-posed problem in a weaker
sense. The problem is recast to the original minimization by the continuation
method and so the a priori knowledge is enforced.
  We apply this approach in the context of topology-to-shape geometry
identification, where it allows to avoid the convergence of gradient-based
methods to a local minima. We present illustrative results for magnetic
induction tomography which is an example of PDE constrained inverse problem.


title:
Local emergence of thermal correlations in an isolated quantum many-body
  system

abstract:
  We experimentally demonstrate how thermal properties in an non-equilibrium
quantum many- body system emerge locally, spread in space and time, and finally
lead to the globally relaxed state. In our experiment, we quench a
one-dimensional (1D) Bose gas by coherently splitting it into two parts. By
monitoring the phase coherence between the two parts we observe that the
thermal correlations of a prethermalized state emerge locally in their final
form and propagate through the system in a light-cone-like evolution. Our
results underline the close link between the propagation of correlations and
relaxation processes in quantum many-body systems.


title: Singularity Free Rainbow Universe

abstract:
  Isotropic quantum cosmological perfect fluid model is studied in the
formalism of Rainbow gravity. It is found that the only surviving matter degree
of freedom played the role of cosmic time. It is possible to find the wave
packet naturally with a suitable choice of the Rainbow functions which resulted
from the superposition of the wave functions of the
Schr$\ddot{o}$dinger-Wheeler-deWitt equation. The many-worlds interpretation of
quantum mechanics is applied to investigate the behavior of the scale factor
and the behaviour is found to depend on the operator ordering. It is shown that
the model in the Rainbow framework naturally avoids singularity and a bouncing
non-singular universe is found.


title:
Effective state, Hawking radiation and quasi-normal modes for Kerr black
  holes

abstract:
  The non-strictly continuous character of the Hawking radiation spectrum
generates a natural correspondence between Hawking radiation and black hole
(BH) quasi-normal modes (QNM). In this work, we generalize recent results on
this important issue to the framework of Kerr BHs (KBH). We show that also for
the KBH, QNMs can be naturally interpreted in terms of quantum levels. Thus,
the emission or absorption of a particle is in turn interpreted in terms of a
transition between two different levels. At the end of the paper, we also
generalize some concepts concerning the "effective state" of a KBH.


title: Information-theoretic-based spreading measures of orthogonal polynomials

abstract:
  The macroscopic properties of a quantum system strongly depend on the
spreading of the physical eigenfunctions (wavefunctions) of its Hamiltonian
operador over its confined domain. The wavefunctions are often controlled by
classical or hypergeometric-type orthogonal polynomials (Hermite, Laguerre and
Jacobi). Here we discuss the spreading of these polynomials over its
orthogonality interval by means of various information-theoretic quantities
which grasp some facets of the polynomial distribution not yet analyzed. We
consider the information-theoretic lengths closely related to the Fisher
information and R\'enyi and Shannon entropies, which quantify the polynomial
spreading far beyond the celebrated standard deviation.


title: Computer simulation of inhibition-dependent binding in a neural network

abstract:
  Reverberating dynamics of neural network is modelled on PC in order to
illustrate possible role of inhibition as binding controller in the network.
The network is composed of binding neurons. In the binding neuron model the
degree of temporal coherence between synaptic inputs is decisive for
triggering, and slow inhibition is expressed in terms of the degree, which is
necessary for triggering. Two learning mechanisms are implemented in the
network, namely, adjusting synaptic strength and/or propagation delays. By
means of forced playing of external pattern the network is taught to support
dynamics with disconnected and bound patterns of activity. By choosing either
high, or low inhibition one can switch between the disconnected and bound
patterns, respectively. This is interpreted as inhibition-controlled binding in
the network.


title: Non-equilibrium Phase Transition from AdS/CFT

abstract:
  Using AdS/CFT correspondence we study non-equilibrium phase transition in the
presence of a constant external magnetic field. The transition occurs when the
sign of differential conductivity reverses. Utilizing numerical method we show
that the type of transition depends on the value of magnetic field as well as
the temperature of gauge theory. Moreover we show that this transition does not
depend on the supersymmetry and the subspace on which the fundamental matter
fields live.


title:
Real time noise and wavelength correlations in octave-spanning
  supercontinuum generation

abstract:
  We use dispersive Fourier transformation to measure shot-to-shot spectral
instabilities in femtosecond supercontinuum generation. We study both the onset
phase of supercontinuum generation with distinct dispersive wave generation, as
well as a highly-unstable supercontinuum regime spanning an octave in
bandwidth. Wavelength correlation maps allow interactions between separated
spectral components to be identified, even when such interactions are not
apparent in shot-to-shot or average measurements. Experimental results are
interpreted using numerical simulations. Our results show the clear advantages
of dispersive Fourier transformation for studying spectral noise during
supercontinuum generation.


title:
Hydrodynamic interactions induce anomalous diffusion under partial
  confinement

abstract:
  Under partial confinement, the motion of colloidal particles is restricted to
a plane but their dynamics is influenced by hydrodynamic interactions mediated
by the unconfined, three--dimensional flow of the embedding fluid. We
demonstrate that this dimensionality mismatch induces a characteristic
divergence in the two--dimensional collective diffusion coefficient of the
colloidal monolayer. This result, independent from the specific interparticle
forces in the monolayer, is solely due to the kinematical constraint on the
colloidal particles, and it is different from the known divergence of transport
coefficients in purely two--dimensional fluids.


title: Combinatorics of non-ambiguous trees

abstract:
  This article investigates combinatorial properties of non-ambiguous trees.
These objects we define may be seen either as binary trees drawn on a grid with
some constraints, or as a subset of the tree-like tableaux previously defined
by Aval, Boussicault and Nadeau. The enumeration of non-ambiguous trees
satisfying some additional constraints allows us to give elegant combinatorial
proofs of identities due to Carlitz, and to Ehrenborg and Steingr\'imsson. We
also provide a hook formula to count the number of non-ambiguous trees with a
given underlying tree. Finally, we use non-ambiguous trees to describe a very
natural bijection between parallelogram polyominoes and binary trees.


title: Inhomogeneous state of few-fermion superfluids

abstract:
  The few-fermion atomic gas is an ideal setting to explore inhomogeneous
superfluid pairing analogous to the Larkin-Ovchinnikov state. Two up and one
down-spin atom is the minimal configuration that displays an inhomogeneous
pairing density whereas imbalanced systems containing more fermions present a
more complex pairing topology. With more than eight atoms trapped the system
approaches the macroscopic superfluid limit. An oblate trap with a central
barrier offers a direct experimental probe of pairing inhomogeneity.


title: Magnetic monopoles at the LHC and in the Cosmos

abstract:
  The magnetic monopole was postulated in 1931 by Dirac to explain electric
charge quantisation. Searches for pair-produced monopoles are performed at
accelerator facilities whenever a new energy regime is made available. In
addition, monopoles with masses too high to be accessible at colliders would
still have been produced in the early Universe and such relics can be searched
for either in flight or trapped in matter. Here we discuss recent results and
future prospects for direct monopole detection at the LHC and in bulk matter
searches, with emphasis on the complementarity between the various techniques.
Significant improvements of the results from the ATLAS experiment are expected
with the development of new triggers. Dedicated LHC experiments will allow to
probe wider ranges of monopole charges and masses: the MoEDAL experiment using
both nuclear-track detectors and absorbing arrays, and searches for trapped
monopoles in accelerator material. Finally, it is highlighted how the first
search for monopoles trapped in polar volcanic rocks allows to set new
constraints on the abundance of monopoles bound to matter in the Earth's
interior and by extension in the primary material that formed the Solar System.


title:
Meta-GGA exchange-correlation functional with a balanced treatment of
  nonlocality

abstract:
  We construct a meta-generalized-gradient approximation which properly
balances the nonlocality contributions to the exchange and correlation at the
semilocal level. This non-empirical functional shows good accuracy for a broad
palette of properties (thermochemistry, structural properties) and systems
(molecules, metal clusters, surfaces and bulk solids). The accuracy for several
well known problems in electronic structure calculations, such as the bending
potential of the silver trimer and the dimensional crossover of anionic gold
clusters, is also demonstrated. The inclusion of empirical dispersion
corrections is finally discussed and analyzed.


title:
Active temperature and velocity correlations produced by a swimmer
  suspension

abstract:
  The agitation produced in a fluid by a suspension of micro-swimmers in the
low Reynolds number limit is studied. In this limit, swimmers are modeled as
force dipoles all with equal strength. The agitation is characterized by the
active temperature defined, as in kinetic theory, as the mean square velocity,
and by the equal-time spatial correlations. Considering the phase in which the
swimmers are homogeneously and isotropically distributed in the fluid, it is
shown that the active temperature and velocity correlations depend on a single
scalar correlation function of the dipole-dipole correlation function. By
making a simple medium range oder model, in which the dipole-dipole correlation
function is characterized by a single correlation length $k_0^{-1}$ it is
possible to make quantitative predictions. It is found that the active
temperature depends on the system size, scaling as $L^{4-d}$ at large
correlation lengths $L\ll k_0^{-1}$, while in the opposite limit it saturates
in three dimensions and diverges logarithmically with the system size in two
dimensions. In three dimensions he velocity correlations decay as $1/r$ for
small correlation lengths, while at large correlation lengths the transverse
correlation function becomes negative at maximum separation $r\sim L/2$, effect
that disappears as the system increases in size.


title:
Toroidal modeling of interaction between resistive wall mode and plasma
  flow

abstract:
  The non-linear interplay between the resistive wall mode (RWM) and the
toroidal plasma flow is numerically investigated in a full toroidal geometry,
by simultaneously solving the initial value problems for the n=1 RWM and the
n=0 toroidal force balance equation. Here n is the toroidal mode number. The
neoclassical toroidal viscous torque is identified as the major momentum sink
that brakes the toroidal plasma flow during the non-linear evolution of the
RWM. This holds for a mode that is initially either unstable or stable. For an
initially stable RWM, the braking of the flow, and hence the eventual growth of
the mode, depends critically on the initial perturbation amplitude.


title: On level 1 cyclotomic KLR algebras of type $A_{n}^{(1)}$

abstract:
  We show some properties on a special case of level 1 cyclotomic KLR algebras
of type $A_{n}^{(1)}$; the number of primitive idempotents, systematic change
of structures, the dimension.