title:
Photoionization accompanied by excitation at intermediate photon
  energies

abstract:
  We calculate the photoionization with excitation-to photoionization ratios
for atomic helium and heliumlike ions at intermediate values of the photon
energies. The final state interactions between the electrons are included in
the lowest order of their Sommerfeld parameter. This enables us, in contrast to
purely numerical calculations to investigate the roles of various mechanisms
contributing beyond the high energy limit. The system of the two bound
electrons is described by the functions obtained by the Correlation Function
Hyperspherical Harmonic Method. For the case of heliumlike ions we present the
high energy limits as power expansion in inverse charge of the nucleus. We
analyse the role of excitation of states with the nonzero orbital momenta.


title:
Bootstrap Confidence Regions for Optimal Operating Conditions in
  Response Surface Methodology

abstract:
  This article concerns the application of bootstrap methodology to construct a
likelihood-based confidence region for operating conditions associated with the
maximum of a response surface constrained to a specified region. Unlike
classical methods based on the stationary point, proper interpretation of this
confidence region does not depend on unknown model parameters. In addition, the
methodology does not require the assumption of normally distributed errors. The
approach is demonstrated for concave-down and saddle system cases in two
dimensions. Simulation studies were performed to assess the coverage
probability of these regions.


title: Surface instability and isotopic impurities in quantum solids

abstract:
  In this paper we employ a self-consistent harmonic approximation to
investigate surface melting and local melting close to quantum impurities in
quantum solids. We show that surface melting can occur at temperatures much
lower than the critical temperature $T_c$ of the solid phase instability in the
bulk. Similar effects are driven by the presence of an isotope substitution. In
this latter case, we show that stronger local lattice fluctuations, induced by
a lighter isotope atom, can induce local melting of the host bulk phase.
Experimental consequences and the possible relevance in solid helium are
discussed.


title:
Two Dimensional Kodaira-Spencer Theory and Three Dimensional
  Chern-Simons Gravity

abstract:
  Motivated by the six dimensional formulation of Kodaira-Spencer theory for
Calabi-Yau threefolds, we formulate a two dimensional version and argue that
this is the relevant field theory for the target space of local topological
B-model with a geometry based on a Riemann surface. We show that the Ward
identities of this quantum theory is equivalent to recursion relations recently
proposed by Eynard and Orantin to solve the topological B model. Our derivation
provides a conceptual explanation of this link and reveals a hidden affine
SL(2,R) symmetry. Moreover we argue that our results provide the strongest
evidence yet of the existence of topological M theory in one higher dimension,
which in this case can be closely related to SL(2,R)Chern-Simons formulation of
three dimensional gravity.


title:
Weighted HLS inequalities for radial functions and Strichartz estimates
  for wave and Schroedinger equations

abstract:
  This paper is concerned with derivation of the global or local in time
Strichartz estimates for radially symmetric solutions of the free wave equation
from some Morawetz-type estimates via weighted Hardy-Littlewood-Sobolev (HLS)
inequalities. In the same way we also derive the weighted end-point Strichartz
estimates with gain of derivatives for radially symmetric solutions of the free
Schroedinger equation.
  The proof of the weighted HLS inequality for radially symmetric functions
involves an application of the weighted inequality due to Stein and Weiss and
the Hardy-Littlewood maximal inequality in the weighted Lebesgue space due to
Muckenhoupt. Under radial symmetry we get significant gains over the usual HLS
inequality and Strichartz estimate.


title: Toward a Gravitation Theory in Berwald--Finsler Space

abstract:
  Finsler geometry is a natural and fundamental generalization of Riemann
geometry. The Finsler structure depends on both coordinates and velocities. It
is defined as a function on tangent bundle of a manifold. We use the Bianchi
identities satisfied by Chern curvature to set up a gravitation theory in
Berwald-Finsler space. The geometric part of the gravitational field equation
is nonsymmetric in general. This indicates that the local Lorentz invariance is
violated. Nontrivial solutions of the gravitational field equation are
presented.


title:
Dirac fields, scalar fields and Final state boundary condition of Black
  hole

abstract:
  We withdraw our paper for one doubt on one of equations .Due to this reason
we will check again our calculation and replace the revised version of this
paper.


title: Spectral properties of entanglement witnesses

abstract:
  Entanglement witnesses are observables which when measured, detect
entanglement in a measured composed system. It is shown what kind of relations
between eigenvectors of an observable should be fulfilled, to allow an
observable to be an entanglement witness. Some restrictions on the signature of
entaglement witnesses, based on an algebraic-geometrical theorem will be given.
The set of entanglement witnesses is linearly isomorphic to the set of maps
between matrix algebras which are positive, but not completely positive. A
translation of the results to the language of positive maps is also given. The
properties of entanglement witnesses and positive maps express as special cases
of general theorems for $k$-Schmidt witnesses and $k$-positive maps. The
results are therefore presented in a general framework.


title: Exponential sums and rank of double persymmetric matrices over F_2

abstract:
  We obtain, using exponential quadratic sums, explicit expressions for the
number of double persymmetric matrices with entries in F_2 of given rank. (A
matix [a(i,j)) is persymmetric if a(i,j) = a(r,s) for i+j = r+s)


title:
Comparison of two models of electric neuro-stimulation and consequences
  for the design of retinal prostheses

abstract:
  Two simple mathematical models of electric neuro-stimulation are derived and
discussed. It is found that the common injected-charge model is less realistic
than a model, in which a latency period, which follows after a short electric
pulse, plays a role as important as the electric pulse. A stimulation signal is
proposed that takes advantage of these findings and calls for experimental
testing.


title: Hydrodynamical models of clumping beyond 50 stellar radii

abstract:
  We present one-dimensional, time-dependent models of the clumps generated by
the line-deshadowing instability. In order to follow the clumps out to
distances of more than 1000 stellar radii, we use an efficient moving-box
technique. We show that, within the approximations, the wind can remain clumped
well into the formation region of the radio continuum.


title: The discrepancy of a needle on a checkerboard

abstract:
  Consider the plane as a checkerboard, with each unit square colored black or
white in an arbitrary manner. We show that for any such coloring there are
straight line segments, of arbitrarily large length, such that the difference
of their white length minus their black length, in absolute value, is at least
the square root of their length, up to a multiplicative constant. For the
corresponding ``finite'' problem ($N \times N$ checkerboard) we also prove that
we can color it in such a way that the above quantity is at most $C \sqrt{N
\log N}$, for any placement of the line segment.


title:
Nonlinear Schroedinger equations with radially symmetric data of
  critical regularity

abstract:
  This paper is concerned with the global existence of small solutions to
pure-power nonlinear Schroedinger equations subject to radially symmetric data
with critical regularity. Under radial symmetry we focus our attention on the
case where the power of nonlinearity is somewhat smaller than the
pseudoconformal power and the initial data belong to the scale-invariant
homogeneous Sobolev space. In spite of the negative-order differentiability of
initial data the nonlinear Schroedinger equation has global in time solutions
provided that the initial data have the small norm. The key ingredient in the
proof of this result is an effective use of global weighted smoothing estimates
specific to radially symmetric solutions.


title: More constructing pairing-friendly elliptic curves for cryptography

abstract:
  The problem of constructing elliptic curves suitable for pairing applications
has received a lot of attention. To solve this, we propose a variant algorithm
of a known method by Brezing and Weng. We produce new families of parameters
using our algorithm for pairing-friendly elliptic curves of embedding degree 8,
and we actually compute some explicit curves as numerical examples.


title: Remarks about Hardy inequalities on metric trees

abstract:
  We find sharp conditions on the growth of a rooted regular metric tree such
that the Neumann Laplacian on the tree satisfies a Hardy inequality. In
particular, we consider homogeneous metric trees. Moreover, we show that a
non-trivial Aharonov-Bohm magnetic field leads to a Hardy inequality on a loop
graph.


title: LULU operators for functions of continuous argument

abstract:
  The LULU operators, well known in the nonlinear multiresolution analysis of
sequences, are extended to functions defined on a continuous domain, namely, a
real interval. We show that the extended operators replicate the essential
properties of their discrete counterparts. More precisely, they form a fully
ordered semi-group of four elements, preserve the local trend and the total
variation.


title:
Lateral electron tunneling through single self-assembled InAs quantum
  dots coupled to superconducting nanogap electrodes

abstract:
  We have fabricated superconductor-quantum dot-superconductor (SC-QD-SC)
junctions by using SC aluminum electrodes with narrow gaps laterally contacting
a single self-assembled InAs QD. The fabricated junctions exhibited clear
Coulomb staircases and Coulomb oscillations at 40 mK. Furthermore, clear
suppression in conductance was observed for the source-drain voltage $|V_{\rm
SD}| < 2\Delta/e$, where $\Delta$ is the SC energy gap of Al. The absence of
Josephson current that flows through QDs is due to the strong Coulomb
interaction and non-negligible thermal fluctuation in our measurement system.


title: Batalin-Vilkovisky algebra structures on Hochschild Cohomology

abstract:
  Let $M$ be any compact simply-connected $d$-dimensional smooth manifold and
let $\mathbb{F}$ be any field. We show that the Gerstenhaber algebra structure
on the Hochschild cohomology on the singular cochains of $M$,
$HH^*(S^*(M);S^*(M))$, extends to a Batalin-Vilkovisky algebra. Such
Batalin-Vilkovisky algebra was conjecturated to exist and is expected to be
isomorphic to the Batalin-Vilkovisky algebra on the free loop space homology on
$M$, $H_{*+d}(LM)$ introduced by Chas and Sullivan. We also show that the
negative cyclic cohomology $HC^*_-(S^*(M))$ has a Lie bracket. Such Lie bracket
is expected to coincide with the Chas-Sullivan string bracket on the
equivariant homology $H_*^{S^1}(LM)$.


title: Pre-asymptotic corrections to fractional diffusion equations

abstract:
  The motion of contaminant particles through complex environments such as
fractured rocks or porous sediments is often characterized by anomalous
diffusion: the spread of the transported quantity is found to grow sublinearly
in time due to the presence of obstacles which hinder particle migration. The
asymptotic behavior of these systems is usually well described by fractional
diffusion, which provides an elegant and unified framework for modeling
anomalous transport. We show that pre-asymptotic corrections to fractional
diffusion might become relevant, depending on the microscopic dynamics of the
particles. To incorporate these effects, we derive a modified transport
equation and validate its effectiveness by a Monte Carlo simulation.


title:
Addendum to ``Canonical bases for quantum generalized Kac-Moody
  algebras''

abstract:
  We provide some necessary details to several arguments appearing in our
previous paper ``Canonical bases for quantum generalized Kac-Moody algebras''.
We also make the link with some other work on the same subject.


title: Structure Function Moments of Proton and Neutron

abstract:
  QCD-inspired phenomenological analysis of experimental moments of proton and
deuteron structure functions F2 have been presented. The obtained results on
the d/u ratio at large-x, isospin dependence of higher twists and comparison
with Lattice QCD calculations were discussed. We remind shortly these results:
the obtained ratio is consistent with the asymptotic limit d/u-->0 at x-->1,
the total contribution of higher twists is found to be isospin independent and
the non-singlet moments are in excellent agreement with the Lattice data. We
present here some details of the analysis triggered by the public discussion.


title: Time drift of cosmological redshifts and its variance

abstract:
  The contribution of cosmological perturbations to the time drift of the
cosmological redshift is derived. It is shown that the dominant correction
arises from the local acceleration of both the emitter and the observer. The
amplitude of this effect is estimated to be of the order of 1% of the drift
signal at z=2-4, but can easily be lowered down to 0.1% by using many
absorption lines and quasars.


title:
Cohomology algebra of plane curves, weak combinatorial type, and
  formality

abstract:
  We determine an explicit presentation by generators and relations of the
cohomology algebra $H^*(\mathbb P^2\setminus C,\mathbb C)$ of the complement to
an algebraic curve $C$ in the complex projective plane $\mathbb P^2$, via the
study of log-resolution logarithmic forms on $\mathbb P^2$. As a first
consequence, we derive that $H^*(\mathbb P^2\setminus C,\mathbb C)$ depends
only on the following finite pieces of data: the number of irreducible
components of $C$ together with their degrees and genera, the number of local
branches of each component at each singular point, and the intersection numbers
of every two distinct local branches at each singular point of $C$. This finite
set of data is referred to as the weak combinatorial type of $C$. A further
corollary is that the twisted cohomology jumping loci of $H^*(\mathbb
P^2\setminus C,\mathbb C)$ containing the trivial character also depend on the
weak combinatorial type of $C$. Finally, the explicit construction of the
generators and relations allows us to prove that complements of plane
projective curves are formal spaces in the sense of Sullivan.


title:
Study of the Quasi-isotropic Solution near the Cosmological Singularity
  in Presence of Bulk-Viscosity

abstract:
  We analyze the dynamical behavior of a quasi-isotropic Universe in the
presence of a cosmological fluid endowed with bulk viscosity. We express the
viscosity coefficient as a power-law of the fluid energy density:
$\zeta=\zeta_0\epsilon^{s}$. Then we fix $s=1/2$ as the only case in which
viscosity plays a significant role in the singularity physics but does not
dominate the Universe dynamics (as requested by its microscopic perturbative
origin). The parameter $\zeta_0$ is left free to define the intensity of the
viscous effects.
  Following the spirit of the work by E.M. Lifshitz and I.M. Khalatnikov on the
quasi-isotropic solution, we analyze both Einstein and hydrodynamic equations
up to first and second order in time. As a result, we get a power-law solution
existing only in correspondence to a restricted domain of $\zeta_0$.


title:
Optimal Wegner estimates for random Schroedinger operators on metric
  graphs

abstract:
  We consider Schroedinger operators with a random potential of alloy type on
infinite metric graphs which obey certain uniformity conditions. For single
site potentials of fixed sign we prove that the random Schroedinger operator
restricted to a finite volume subgraph obeys a Wegner estimate which is linear
in the volume and reproduces the modulus of continuity of the single site
distribution. This improves and unifies earlier results for alloy type models
on metric graphs. We discuss applications of Wegner estimates to bounds of the
modulus of continuity of the integrated density of states of ergodic
Schroedinger operators, as well as to the proof of Anderson localisation via
the multiscale analysis


title:
Nonperturbative Effects and the Large-Order Behavior of Matrix Models
  and Topological Strings

abstract:
  This work addresses nonperturbative effects in both matrix models and
topological strings, and their relation with the large-order behavior of the
1/N expansion. We study instanton configurations in generic one-cut matrix
models, obtaining explicit results for the one-instanton amplitude at both one
and two loops. The holographic description of topological strings in terms of
matrix models implies that our nonperturbative results also apply to
topological strings on toric Calabi-Yau manifolds. This yields very precise
predictions for the large-order behavior of the perturbative genus expansion,
both in conventional matrix models and in topological string theory. We test
these predictions in detail in various examples, including the quartic matrix
model, topological strings on the local curve, and Hurwitz theory. In all these
cases we provide extensive numerical checks which heavily support our
nonperturbative analytical results. Moreover, since all these models have a
critical point describing two-dimensional gravity, we also obtain in this way
the large-order asymptotics of the relevant solution to the Painleve I
equation, including corrections in inverse genus. From a mathematical point of
view, our results predict the large-genus asymptotics of simple Hurwitz numbers
and of local Gromov-Witten invariants.


title: On the stability of thick brane worlds non-minimally coupled to gravity

abstract:
  We analyze a class of 5D models where a 3 brane is generated by a bulk scalar
field non minimally coupled to gravity. We show that perturbative stability of
such branes is normally guaranteed although non minimal couplings are not
innocuous in general. After the physical states are identified the linearized
equations for propagating modes are evaluated into a Schroedinger form and
supersymmetric quantum mechanics provides the absence of tachyons. The spectrum
contains a tower of spin 2 and spin 0 fields with continuous masses starting
from zero ones. For regular geometries the scalar spectrum contains a state
with zero mass which is always non normalizable. The propagating massive scalar
states are repelled off the brane due to a centrifugal potential.


title: Irreducibility of the symmetric Yagzhev's maps

abstract:
  Let $F:\Cn \to \Cn$ be a polynomial mapping in Yagzhev's form,i.e.
$$F(x_1,\ld,x_n)=(x_1+H_1(x_1,\ld,x_n),\ld,x_n+H_n(x_1,\ld,x_n)),$$ where $H_i$
are homogenous polynomials of degree 3. In this paper we show that if $\Jac(F)
\in \mathbb{C}^*$ and the Jacobian matrix of $F$ is symmetric, then all the
polynomials $x_i+H_i(x_1,\ld,x_n)$ are irreducible as elements of the ring
$\mathbb{C}[x_1,\ld,x_n]$.


title:
The Rectilinar Three-body Problem using Symbol Sequence II. Role of the
  periodic orbits

abstract:
  We study the change of phase space structure of the rectilinear three-body
problem when the mass combination is changed. Generally, periodic orbits
bifurcate from the stable Schubart periodic orbit and move radially outward.
Among these periodic orbits there are dominant periodic orbits having rotation
number (n-2)/n with n <= 3. We find that the number of dominant periodic orbits
is two when n is odd and four when n is even. Dominant periodic orbits have
large stable regions in and out of the stability region of the Schubart orbit
(Schubart region), and so they determine the size of the Schubart region and
influence the structure of the Poincare section out of the Schubart region.
Indeed, with the movement of the dominant periodic orbits, part of complicated
structure of the Poincare section follow these orbits. We find stable periodic
orbits which do not bifurcate from the Schubart orbit.


title: Intrinsic channel closing in strong-field single ionization of H2

abstract:
  The ionization of H2 in intense laser pulses is studied by numerical
integration of the time-dependent Schr\"odinger equation for a
single-active-electron model including the vibrational motion. The electron
kinetic-energy spectra in high-order above-threshold ionization are strongly
dependent on the vibrational quantum number of the created H2+ ion. For certain
vibrational states, the electron yield in the mid-plateau region is strongly
enhanced. The effect is attributed to channel closings, which were previously
observed in atoms by varying the laser intensity.


title:
Absolute kinematics of radio source components in the complete S5 polar
  cap sample. III. First wide-field high-precision astrometry at 15.4 GHz

abstract:
  We report on the first wide-field, high-precision astrometric analysis of the
13 extragalactic radio sources of the complete S5 polar cap sample at 15.4 GHz.
We describe new algorithms developed to enable the use of differenced phase
delays in wide-field astrometric observations and discuss the impact of using
differenced phase delays on the precision of the wide-field astrometric
analysis. From this global fit, we obtained estimates of the relative source
positions with precisions ranging from 14 to 200 $\mu$as at 15.4 GHz, depending
on the angular separation of the sources (from $\sim$1.6 to $\sim$20.8
degrees). These precisions are $\sim$10 times higher than the achievable
precisions using the phase-reference mapping technique.


title: Good Banach spaces for piecewise hyperbolic maps via interpolation

abstract:
  We introduce a weak transversality condition for piecewise C^{1+\alpha} and
piecewise hyperbolic maps which admit a C^{1+\alpha} stable distribution. We
show good bounds on the essential spectral radius of the associated transfer
operators acting on classical anisotropic Sobolev spaces of Triebel-Lizorkin
type. In many cases, we obtain a spectral gap from which we deduce the
existence of finitely many physical measures with basin of total measure. The
analysis relies on standard techniques (in particular complex interpolation)
and applies also to piecewise expanding maps and to Anosov diffeomorphisms,
giving a unifying picture of several previous results.


title: Lattice QCD study of $g_A^{N^*N^*}$ with two flavors of dynamical quarks

abstract:
  We report the first lattice QCD result of the axial charge of N(1535),
$g_A^{N^*N^*}$. The measurement is performed with two flavors of dynamical
quarks employing the renormalization-group improved gauge action at
$\beta$=1.95 and the mean-field improved clover quark action with the hopping
parameters, $\kappa$=0.1375, 0.1390 and 0.1400. In order to avoid the signal
contaminations by N(1650) lying just 100 MeV above N(1535), we construct
2$\times$2 correlation matrices and diagonalize them so that clear signal
separation can be found. The wraparound contributions in the correlator, which
can be another source of signal contamination, are eliminated by imposing the
Dirichlet boundary condition in the temporal direction. We find that the axial
charge of N(1535) takes small values as $g_A^{N^*N^*}\sim 0.2$, independent of
quark masses, in the pion-mass range of 0.7 to 1.1 GeV.


title: Tropical complete intersection curves

abstract:
  A tropical complete intersection curve C in R^(n+1) is a transversal
intersection of n smooth tropical hypersurfaces. We give a formula for the
number of vertices of C given by the degrees of the tropical hypersurfaces. We
also compute the genus of C (defined as the number of independent cycles of C)
when C is smooth and connected.


title: QCD plasma instability and thermalisation at heavy ion collisions

abstract:
  Under suitable non-equilibrium conditions QCD plasma can develop plasma
instabilities, where some modes of the plasma grow exponentially. It has been
argued that these instabilities can play a significant role in the
thermalisation of the plasma in heavy-ion collision experiments. We study the
instability in SU(2) plasmas using the hard thermal loop effective lattice
theory, which is suitable for studying real-time evolution of long wavelength
modes in the plasma. We observe that under suitable conditions the plasma can
indeed develop an instability which can grow to a very large magnitude,
necessary for the rapid thermalisation in heavy-ion collisions.


title:
Selective reflection spectroscopy of a vapour at a calcium fluoride
  interface

abstract:
  Fluoride materials exhibit surface resonances located in the thermal
infrared. This makes them interesting to search for a fundamental temperature
dependence of the atom-surface interaction, originating in the near-field
thermal emissivity of the surface. Preliminary selective reflection experiments
performed on a special Cs vapour cell that includes a CaF2 interface show a
temperature dependence, yet to be analyzed


title:
Decomposition of neuronal assembly activity via empirical
  de-Poissonization

abstract:
  Consider a compound Poisson process with jump measure $\nu$ supported by
finitely many positive integers. We propose a method for estimating $\nu$ from
a single, equidistantly sampled trajectory and develop associated statistical
procedures. The problem is motivated by the question whether nerve cells in the
brain exhibit higher-order interactions in their firing patterns. According to
the neuronal assembly hypothesis (Hebb [13]), synchronization of action
potentials across neurons of different groups is considered a signature of
assembly activity, but it was found notoriously difficult to demonstrate it in
recordings of neuronal activity. Our approach based on a compound Poisson model
allows to detect the presence of joint spike events of any order using only
population spike count samples, thus bypassing both the ``curse of
dimensionality'' and the need to isolate single-neuron spike trains in
population signals.


title:
Photometric Analysis of Recently Discovered Eclipsing Binary GSC
  00008-00901

abstract:
  Photometric analysis of $BVR_C$ light curves of newly discovered eclipsing
binary GSC 0008-00901 is presented. The orbital period is improved to
0.28948(11) days. Photometric parameters are determined, as well. The analysis
yielded to conclusion that system is an over-contact binary of W UMa type with
components not in thermal contact. The light curves from 2005 show the presence
of a spot on the surface of one of the components, while light curves from 2006
are not affected by maculation.


title: Radiation Driven Inflation

abstract:
  A novel scalar field free approach to cosmic inflation is presented. The
inflationary Universe and the radiation dominated Universe are shown, within
the framework of unified brane cosmology, to be two different phases governed
by one and the same energy density. The phase transition of second order (the
Hubble constant exhibits a finite jump) appears naturally and serves as the
exit mechanism. No re-heating is needed. The required number of e-folds is
achieved without fine tuning.


title: Ring surface waves in thermal nonlinear media

abstract:
  We address ring-shaped surface waves supported by defocusing thermal media
with circular cross-section. Such waves exist because of the balance between
repulsion from the interface and deflection of light from the bulk medium due
to defocusing nonlocal nonlinearity. The properties of such surface waves are
determined by the geometry of the sample. Nodeless ring surface waves are
stable for all values of their winding number, while surface waves with a small
number of azimuthal nodes can be metastable.


title: Interacting Q-balls

abstract:
  We study non-topological solitons, so called Q-balls, which carry a
non-vanishing Noether charge and arise as lump solutions of self-interacting
complex scalar field models. Explicit examples of new axially symmetric
non-spinning Q-ball solutions that have not been studied so far are constructed
numerically. These solutions can be interpreted as angular excitations of the
fundamental $Q$-balls and are related to the spherical harmonics.
Correspondingly, they have higher energy and their energy densities possess two
local maxima on the positive z-axis.
  We also study two Q-balls interacting via a potential term in (3+1)
dimensions and construct examples of stationary, solitonic-like objects in
(3+1)-dimensional flat space-time that consist of two interacting global scalar
fields. We concentrate on configurations composed of one spinning and one
non-spinning Q-ball and study the parameter-dependence of the energy and
charges of the configuration.
  In addition, we present numerical evidence that for fixed values of the
coupling constants two different types of 2-Q-ball solutions exist: solutions
with defined parity, but also solutions which are asymmetric with respect to
reflexion through the x-y-plane.


title: Accretion and Outflow-Related X-Rays in T Tauri Stars

abstract:
  We report on accretion- and outflow-related X-rays from T Tauri stars, based
on results from the "XMM-Newton Extended Survey of the Taurus Molecular Cloud."
X-rays potentially form in shocks of accretion streams near the stellar
surface, although we hypothesize that direct interactions between the streams
and magnetic coronae may occur as well. We report on the discovery of a "soft
excess" in accreting T Tauri stars supporting these scenarios. We further
discuss a new type of X-ray source in jet-driving T Tauri stars. It shows a
strongly absorbed coronal component and a very soft, weakly absorbed component
probably related to shocks in microjets. The excessive coronal absorption
points to dust-depletion in the accretion streams.


title: On the dyon partition function in N=2 theories

abstract:
  We study the entropy function of two N =2 string compactifications obtained
as freely acting orbifolds of N=4 theories : the STU model and the FHSV model.
The Gauss-Bonnet term for these compactifications is known precisely. We apply
the entropy function formalism including the contribution of this four
derivative term and evaluate the entropy of dyons to the first subleading order
in charges for these models. We then propose a partition function involving the
product of three Siegel modular forms of weight zero which reproduces the
degeneracy of dyonic black holes in the STU model to the first subleading order
in charges. The proposal is invariant under all the duality symmetries of the
STU model. For the FHSV model we write down an approximate partition function
involving a Siegel modular form of weight four which captures the entropy of
dyons in the FHSV model in the limit when electric charges are much larger than
magnetic charges.


title:
Wave equations on space-times of low regularity: Existence results and
  regularity theory in the framework of generalized function algebras

abstract:
  We present recent developments concerning Lorentzian geometry in algebras of
generalized functions. These have, in particular, raised a new interest in
refined regularity theory for the wave equation on singular space-times.


title:
The Commutativity of Integrals of Motion for Quantum Spin Chains and
  Elliptic Functions Identities

abstract:
  We prove the commutativity of the first two nontrivial integrals of motion
for quantum spin chains with elliptic form of the exchange interaction. We also
show thair linear independence for the numbers of spins larger than 4. As a
byproduct, we obtained several identities between elliptic Weierstrass
functions of three and four arguments.


title: Baby Skyrmions on the Two-Sphere

abstract:
  We find the static multi-soliton solutions of the baby Skyrme model on the
two-sphere for topological charges 1 =< B =< 14. Numerical full-field results
show that the charge-one Skyrmion is spherical, the charge-two Skyrmion is
toroidal, and Skyrmions with higher charge all have point symmetries which are
subgroups of O(3). We find that a rational map ansatz yields very good
approximations to the full-field solutions. We point out a strong connection
between the discrete symmetries of our solutions and those of corresponding
solutions of the 3D Skyrme model.


title: Equal charge black holes and seven dimensional gauged supergravity

abstract:
  We present various supergravity black holes of different dimensions with some
U(1) charges set equal in a simple, common form. Black hole solutions of seven
dimensional U(1)^2 gauged supergravity with three independent angular momenta
and two equal U(1) charges are obtained. We investigate the thermodynamics and
the BPS limit of this solution, and find that there are rotating supersymmetric
black holes without naked closed timelike curves. There are also supersymmetric
topological soliton solutions without naked closed timelike curves that have a
smooth geometry.


title: Is Quantum Mechanics needed to explain consciousness ?

abstract:
  In this short comment to a recent contribution by E. Manousakis [1] it is
argued that the reported agreement between the measured time evolution of
conscious states during binocular rivalry and predictions derived from quantum
mechanical formalisms does not require any direct effect of QM. The recursive
consumption analysis process in the Ouroboros Model can yield the same
behavior.


title: S-wave meson scattering up to sqrt{s} < 2 GeV from chiral Lagrangians

abstract:
  The problem of scalar mesons still remains a challenging puzzle, for which we
do not even know which are the right pieces to set up. The proliferation of
resonances (some of them are very broad and appear on top of hadronic
thresholds) and of coupled channels that interact strongly among each other
makes the study of this sector a hard task. Our objective is the study of the
strongly interacting mesons in coupled channels with quantum numbers J^{PC} =
0^{++} and I=0 and I=1/2, up to a center of mass energy sqrt{s} < 2 GeV. Our
framework is based on Unitary Chiral Perturbation Theory. We include for I=0
the channels: \pi\pi, K\bar{K}, \eta\eta, \sigma\sigma, \eta\eta', \rho\rho,
\omega\omega, \eta'\eta', \omega\phi, \phi\phi, K^\ast \bar{K}^\ast,
a_1(1260)\pi and \pi^{\star}(1300)\pi. In addition, and in order to constrain
our fits, we also study the I=1/2, 3/2 channels given by K\pi, K\eta and
K\eta'. We finally present the resonant content of our fits with the $\sigma$,
$f_0(980)$, $f_0(1310)$, $f_(1500)$, $f_0(1710)$ and $f_0(1790)$.


title: Magnetic nanowires as permanent magnet materials

abstract:
  We present the fabrication of metallic magnetic nanowires using a low
temperature chemical process. We show that pressed powders and magnetically
oriented samples exhibit a very high coercivity (6.5 kOe at 140 K and 4.8 kOe
at 300 K). We discuss the magnetic properties of these metamaterials and show
that they have the suitable properties to realize "high temperature magnets"
competitive with AlNiCo or SmCo permanent magnets. They could also be used as
recording media for high density magnetic recording.


title: Galilean Classification of Curves

abstract:
  In this paper, we classify space-time curves up to Galilean group of
transformations with Cartan's method of equivalence. As an aim, we elicit
invariats from action of special Galilean group on space-time curves, that are,
in fact, conservation laws in physics. We also state a necessary and sufficient
condition for equivalent Galilean motions.


title: On the existence of a reverse shock in magnetized GRB ejecta

abstract:
  The role of magnetic fields in gamma-ray burst (GRB) flows remains
controversial. The study of the early afterglow phases and, in particular, of
the reverse shock dynamics and associated emission offers a promising probe of
the magnetization of the ejecta. In this paper, we derive the conditions for
the existence of a reverse shock in arbitrarily magnetized ejecta that
decelerate and interact with the circumburst medium. Both constant and
wind-like density profiles are considered. We show, in contrast to previous
estimates, that ejecta with magnetization larger than unity are not crossed by
a reverse shock for a large fraction of the parameter space relevant to GRB
flows. Allowing for shell spreading, there is always a relativistic or mildly
relativistic reverse shock forming in sigma_o < 0.3 ejecta. From this, we
conclude that the paucity of optical flashes, believed to be a distinctive
signature of a reverse shock, may be explained by the existence of dynamically
important magnetic fields in the ejecta.


title:
On the infinitesimal rigidity of polyhedra with vertices in convex
  position

abstract:
  Let $P \subset \R^3$ be a polyhedron. It was conjectured that if $P$ is
weakly convex (i. e. its vertices lie on the boundary of a strictly convex
domain) and decomposable (i. e. $P$ can be triangulated without adding new
vertices), then it is infinitesimally rigid. We prove this conjecture under a
weak additional assumption of codecomposability.
  The proof relies on a result of independent interest concerning the
Hilbert-Einstein function of a triangulated convex polyhedron. We determine the
signature of the Hessian of that function with respect to deformations of the
interior edges. In particular, if there are no interior vertices, then the
Hessian is negative definite.


title:
The physical meaning of scattering matrix singularities in
  coupled-channel formalisms

abstract:
  The physical meaning of bare and dressed scattering matrix singularities has
been investigated. Special attention has been attributed to the role of well
known invariance of scattering matrix with respect to the field transformation
of the effective Lagrangian. Examples of evaluating bare and dressed quantities
in various models are given.


title: Review of Beauty Production at HERA and Elsewhere

abstract:
  Experimental results on beauty production at HERA are reviewed in the context
of similar measurements at other colliders. As a result of a phenomenological
study of the QCD scale dependence of many different NLO and NNLO predictions, a
modification of the ``default'' scale choice is advocated. Experimental
constraints on the photon-quark coupling are also investigated.


title: Eclipsing Binaries Showing Light Time Effect

abstract:
  Four eclipsing binaries, which show apparent changes of period, have been
studied with respect to a possible presence of the light time effect. With a
least squares method we calculated new light elements of these systems, the
mass function of the predicted third body, and its minimum mass. We discuss the
probability of the presence of such bodies in terms of mass function, changes
in radial velocity and third light in solution of light curves.


title: Five or six step scenario for evolution?

abstract:
  The prediction that (due to the limited amount of hydrogen available as fuel
in the Sun) the future duration of our favourable terrestrial environment will
be short (compared with the present age of the Earth) has been interpreted as
evidence for a hard step scenario. This means that some of the essential steps
(such as the development of eukaryotes) in the evolution process leading to the
ultimate emergence of intelligent life would have been hard, in the sense of
being against the odds in the available time, so that they are unlikely to have
been achieved in most of the earth-like planets that may one day be discovered
in nearby extra-solar systems. It was originally estimated that only one or two
of the essential evolutionary steps had to have been hard in this sense, but it
has become apparent that this figure may need upward revision, because recent
studies of climatic instability suggest that the possible future duration of
our biologically favourable environment may be shorter than had been supposed,
only about one Giga year rather than five. On the basis of the statistical
requirement of roughly equal spacing between hard steps, it is argued that the
best fit with the fossil record is now obtainable by postulating the number of
hard steps to be five, if our evolution was exclusively terrestrial, or six if,
as now seems very plausible, the first step occurred on Mars.


title:
Performance bounds and codes design criteria for channel decoding with
  a-priori information

abstract:
  In this article we focus on the problem of channel decoding in presence of
a-priori information. In particular, assuming that the a-priori information
reliability is not perfectly estimated at the receiver, we derive a novel
analytical framework for evaluating the decoder's performance. It is derived
the important result that a "good code", i.e., a code which allows to fully
exploit the potential benefit of a-priori information, must associate
information sequences with high Hamming weights to codewords with low Hamming
weights. Basing on the proposed analysis, we analyze the performance of
convolutional codes, random codes, and turbo codes. Moreover, we consider the
transmission of correlated binary sources from independent nodes, a problem
which has several practical applications, e.g. in the case of sensor networks.
In this context, we propose a very simple joint source-channel turbo decoding
scheme where each decoder works by exploiting a-priori information given by the
other decoder. In the case of block fading channels, it is shown that the
inherent correlation between information signals provide a form of
non-cooperative diversity, thus allowing joint source-channel decoding to
outperform separation-based schemes.


title:
Nonmonotonic effects of parallel sidewalls on Casimir forces between
  cylinders

abstract:
  We analyze the Casimir force between two parallel infinite metal cylinders,
with nearby metal plates (sidewalls), using complementary methods for mutual
confirmation. The attractive force between cylinders is shown to have a
nonmonotonic dependence on the separation to the plates. This intrinsically
multi-body phenomenon, which occurs with either one or two sidewalls
(generalizing an earlier result for squares between two sidewalls), does not
follow from any simple two-body force description. We can, however, explain the
nonmonotonicity by considering the screening (enhancement) of the interactions
by the fluctuating charges (currents) on the two cylinders, and their images on
the nearby plate(s). Furthermore, we show that this effect also implies a
nonmonotonic dependence of the cylinder-plate force on the cylinder-cylinder
separation.


title:
Shells around black holes: the effect of freely specifiable quantities
  in Einstein's constraint equations

abstract:
  We solve Einstein's constraint equations in the conformal thin-sandwich
decomposition to model thin shells of non-interacting particles in circular
orbit about a non-rotating black hole. We use these simple models to explore
the effects of some of the freely specifiable quantities in this decomposition
on the physical content of the solutions. Specifically, we adopt either maximal
slicing or Kerr-Schild slicing, and make different choices for the value of the
lapse on the black hole horizon. For one particular choice of these quantities
the resulting equations can be solved analytically; for all others we construct
numerical solutions. We find that these different choices have no effect on our
solutions when they are expressed in terms of gauge-invariant quantities.


title: Evolution in random fitness landscapes: the infinite sites model

abstract:
  We consider the evolution of an asexually reproducing population in an
uncorrelated random fitness landscape in the limit of infinite genome size,
which implies that each mutation generates a new fitness value drawn from a
probability distribution $g(w)$. This is the finite population version of
Kingman's house of cards model [J.F.C. Kingman, \textit{J. Appl. Probab.}
\textbf{15}, 1 (1978)]. In contrast to Kingman's work, the focus here is on
unbounded distributions $g(w)$ which lead to an indefinite growth of the
population fitness. The model is solved analytically in the limit of infinite
population size $N \to \infty$ and simulated numerically for finite $N$. When
the genome-wide mutation probability $U$ is small, the long time behavior of
the model reduces to a point process of fixation events, which is referred to
as a \textit{diluted record process} (DRP). The DRP is similar to the standard
record process except that a new record candidate (a number that exceeds all
previous entries in the sequence) is accepted only with a certain probability
that depends on the values of the current record and the candidate. We develop
a systematic analytic approximation scheme for the DRP. At finite $U$ the
fitness frequency distribution of the population decomposes into a stationary
part due to mutations and a traveling wave component due to selection, which is
shown to imply a reduction of the mean fitness by a factor of $1-U$ compared to
the $U \to 0$ limit.


title:
Magnetism of one-dimensional Wigner lattices and its impact on charge
  order

abstract:
  The magnetic phase diagram of the quarter-filled generalized Wigner lattice
with nearest- and next-nearest-neighbor hopping t_1 and t_2 is explored. We
find a region at negative t_2 with fully saturated ferromagnetic ground states
that we attribute to kinetic exchange. Such interaction disfavors
antiferromagnetism at t_2 <0 and stems from virtual excitations across the
charge gap of the Wigner lattice, which is much smaller than the Mott-Hubbard
gap proportional to U. Remarkably, we find a strong dependence of the charge
structure factor on magnetism even in the limit U to infinity, in contrast to
the expectation that charge ordering in the Wigner lattice regime should be
well described by spinless fermions. Our results, obtained using the
density-matrix renormalization group and exact diagonalization, can be
transparently explained by means of an effective low-energy Hamiltonian.


title:
Transverse Radial Flow Effects on Two- and Three-Particle Angular
  Correlations

abstract:
  We use a simple a transverse radial boost scenario coupled to PYTHIA events
to illustrate the impact radial flow may have on two- and three-particle
correlation functions measured in heavy-ion collisions. We show that modest
radial velocities can impart strong modifications to the correlation functions,
some of which may be interpreted as same side ridge and away side structure
that can mimic conical emission.


title: A misleading Wilsonian fixed point

abstract:
  We exhibit here, for a scalar theory, an apparently non-trivial Wilsonian
fixed point, which surprisingly describes a free theory. This modest note is an
observation which can be of interest in the framework of functional methods in
Quantum Field Theory.


title: Entropy of capacities on lattices and set systems

abstract:
  We propose a definition for the entropy of capacities defined on lattices.
Classical capacities are monotone set functions and can be seen as a
generalization of probability measures. Capacities on lattices address the
general case where the family of subsets is not necessarily the Boolean lattice
of all subsets. Our definition encompasses the classical definition of Shannon
for probability measures, as well as the entropy of Marichal defined for
classical capacities. Some properties and examples are given.


title:
Coherence Induced by Incoherent Pumping Field and Decay Process in
  Three-level $\Lambda$ Type Atomic System

abstract:
  Following the method of Victor V. Kozlov et al.[PhysRevA. 74. 063829],we
inspect the coherence induced by incoherent pump and spontaneous decay process
in $\Lambda$ type three-level atomic system with degenerated lower duplicate
levels. The system shows a coherent population trapping state and multi-steady
states characteristic in different conditions. Interestingly, two kinds of
steady states generated by the system in different sets of pumping and decaying
parameters, the "singlet" state and the "triplet" state, exhibit stable or
unstable characteristics under the action of pumping field and vacuum
reservoir, which promise fruitful applications to atomic coherence and
interference in quantum optics.


title: Quantum de Sitter Space-Time and the Dark Energy

abstract:
  Three years ago, we introduced a new way to quantize the static Schwarzschild
black hole(SSBH), there the SSBH was first treated as a single periodic
Euclidean system and then the Bohr-Sommerfeld quantum condition of action was
used to obtain a quantum theory of Schwarzschild black hole.[1] Now in this
short report, we try to extend the above method to quantize the static de
Sitter(SDS) space-time and establish a quantum theory of both SDS space and
dark energy.


title:
Quantum FRW cosmological solutions in the presence of Chaplygin gas and
  perfect fluid

abstract:
  We present a Friedmann-Robertson-Walker quantum cosmological model in the
presence of Chaplygin gas and perfect fluid for early and late time epoches. In
this work, we consider perfect fluid as an effective potential and apply
Schutz's variational formalism to the Chaplygin gas which recovers the notion
of time. These give rise to Schr\"odinger-Wheeler-DeWitt equation for the scale
factor. We use the eigenfunctions in order to construct wave packets and study
the time dependent behavior of the expectation value of the scale factor using
the many-worlds interpretation of quantum mechanics. We show that contrary to
the classical case, the expectation value of the scale factor avoids
singularity at quantum level. Moreover, this model predicts that the expansion
of Universe is accelerating for the late times.


title:
s-Wave Approximation for Asymmetry in Nonmesonic Decay of Finite
  Hypernuclei

abstract:
  We establish the bridge between the commonly used
Nabetani-Ogaito-Sato-Kishimoto (NOSK) formula for the asymmetry parameter
$a_\Lambda$ in the $\vec\Lambda p \to np$ emission of polarized hypernuclei,
and the shell model (SM) formalism for finite hypernuclei. We demonstrate that
the s-wave approximation leads to a SM formula for $a_\Lambda$ that is as
simple as the NOSK one, and that reproduces the exact results for
$^5_\Lambda$He and $^{12}_\Lambda$C better than initially expected. The
simplicity achieved here is indeed remarkable. The new formalism makes the
theoretical evaluation of $a_\Lambda$ more transparent, and explains clearly
why the one-meson exchange model is unable to account for the experimental data
of $^5_\Lambda$He.


title: On the spectral gap in Andreev graphs

abstract:
  We introduce Andreev scattering (electron-hole conversion at an interface of
a normal conductor to a superconductor) at the outer vertices of a quantum star
graph and examine its effect on the spectrum. More specifically we show that
the density of states in Andreev graphs is suppressed near the Fermi energy
where a spectral gap may occur. The size and existence of such a gap depends on
one side on the Andreev scattering amplitudes and, on the other side,on the
properties of the electron-electron scattering matrix at the central vertex. We
also show that the bond length fluctuations have a minor effect on the spectrum
near the Fermi energy.

categories: cond-mat.supr-con cond-mat.dis-nn math-ph math.MP


title: NH3 Observations of the Infrared Dark Cloud G28.34+0.06

abstract:
  We present observations of the \nh3 (J,K) = (1,1) and (2,2) inversion
transitions toward the infrared dark cloud G28.34+0.06, using the Very Large
Array. Strong NH3 emission is found to coincide well with the infrared
absorption feature in this cloud. The northern region of G28.34+0.06 is
dominated by a compact clump (P2) with a high rotation temperature (29 K),
large line width (4.3 km s$^{-1}$), and is associated with strong water maser
(240 Jy) and a 24 $\mu$m point source with far IR luminosity of $10^3$ \lsun.
We infer that P2 has embedded massive protostars although it lies in the 8
$\mu$m absorption region. The southern region has filamentary structures. The
rotation temperature in the southern region decreases with the increase of the
integrated NH3 intensity, which indicates an absence of strong internal heating
in these clumps. In addition, the compact core P1 in the south has small line
width (1.2 km s$^{-1}$) surrounded by extended emission with larger line width
(1.8 km s$^{-1}$), which suggests a dissipation of turbulence in the dense part
of the cloud. Thus, we suggest that P1 is at a much earlier evolutionary stage
than P2, possibly at a stage that begins to form a cluster with massive stars.


title: Circular spectrum and bounded solutions of periodic evolution equations

abstract:
  We consider the existence and uniqueness of bounded solutions of periodic
evolution equations of the form $u'=A(t)u+\epsilon H(t,u)+f(t)$, where $A(t)$
is, in general, an unbounded operator depending 1-periodically on $t$, $H$ is
1-periodic in $t$, $\epsilon$ is small, and $f$ is a bounded and continuous
function that is not necessarily uniformly continuous. We propose a new
approach to the spectral theory of functions via the concept of "circular
spectrum" and then apply it to study the linear equations $u'=A(t)u+f(t)$ with
general conditions on $f$. For small $\epsilon$ we show that the perturbed
equation inherits some properties of the linear unperturbed one. The main
results extend recent results in the direction, saying that if the unitary
spectrum of the monodromy operator does not intersect the circular spectrum of
$f$, then the evolution equation has a unique mild solution with its circular
spectrum contained in the circular spectrum of $f$.


title:
Temporal decorrelation of collective oscillations in neural networks
  with local inhibition and long-range excitation

abstract:
  We consider two neuronal networks coupled by long-range excitatory
interactions. Oscillations in the gamma frequency band are generated within
each network by local inhibition. When long-range excitation is weak, these
oscillations phase-lock with a phase-shift dependent on the strength of local
inhibition. Increasing the strength of long-range excitation induces a
transition to chaos via period-doubling or quasi-periodic scenarios. In the
chaotic regime oscillatory activity undergoes fast temporal decorrelation. The
generality of these dynamical properties is assessed in firing-rate models as
well as in large networks of conductance-based neurons.


title:
New estimation of the spectral index of high-energy cosmic rays as
  determined by the Compton-Getting anisotropy

abstract:
  The amplitude of the Compton-Getting (CG) anisotropy contains the power-law
index of the cosmic-ray energy spectrum. Based on this relation and using the
Tibet air-shower array data, we measure the cosmic-ray spectral index to be
$-3.03 \pm 0.55_{stat} \pm < 0.62_{syst}$ between 6 TeV and 40 TeV, consistent
with $-$2.7 from direct energy spectrum measurements. Potentially, this CG
anisotropy analysis can be utilized to confirm the astrophysical origin of the
``knee'' against models for non-standard hadronic interactions in the
atmosphere.


title: Plasma Electromagnetic Fluctuations as an Initial Value Problem

abstract:
  Fluctuations of electric and magnetic fields in the collisionless plasma are
found as a solution of the initial value linearized problem. The plasma initial
state is on average stationary and homogeneous. When the state is stable, the
initial fluctuations decay exponentially and in the long time limit a
stationary spectrum of fluctuations is established. For the equilibrium plasma
it reproduces the spectrum obtained from the fluctuation-dissipation relation.
Fluctuations in the unstable two-stream system are also discussed.


title:
Stress-driven phase transformation and the roughening of solid-solid
  interfaces

abstract:
  The application of stress to multiphase solid-liquid systems often results in
morphological instabilities. Here we propose a solid-solid phase transformation
model for roughening instability in the interface between two porous materials
with different porosities under normal compression stresses. This instability
is triggered by a finite jump in the free energy density across the interface,
and it leads to the formation of finger-like structures aligned with the
principal direction of compaction. The model is proposed as an explanation for
the roughening of stylolites - irregular interfaces associated with the
compaction of sedimentary rocks that fluctuate about a plane perpendicular to
the principal direction of compaction.


title:
Leading Yukawa corrections to Higgs production associated with a tagged
  bottom anti-bottom pair in the Standard Model at the LHC

abstract:
  Considering the large value of the top Yukawa coupling, we investigate the
leading one-loop Yukawa electroweak corrections that can be induced by the top
quark in a process such as Higgs production in association with a tagged bottom
anti-bottom pair at the LHC. At NLO these contributions are found to be small
at the LHC both for the total cross section and for the distributions. In the
limit of vanishing bottom Yukawa coupling where the LO contribution vanishes,
the process can still be induced at one-loop through the top quark transition.
Though this contribution which can be counted as part of the NNLO correction is
small for Higgs masses around 120GeV, it quickly picks up for higher Higgs
masses. This contribution represents the rescattering of the top quarks and
their decay into W's leading to Higgs production through WW fusion


title:
Excited Baryons in Large Nc QCD: Matching the 1/Nc expansion to quark
  models using the permutation group S_N

abstract:
  We show how to match quark models to the 1/Nc expansion of QCD. As an example
we discuss in detail the mass operator of orbitally excited baryons and match
it to the one-gluon exchange and the one-boson exchange variants of the quark
model. The matching procedure is very general and makes use of the
transformation properties of states and operators under S_N^{orb} \times
S_N^{sp-fl}, the permutation group acting on the orbital and spin-flavor
degrees of freedom of N quarks.


title: Odyssey: a Solar System Mission

abstract:
  The Solar System Odyssey mission uses modern-day high-precision experimental
techniques to test the laws of fundamental physics which determine dynamics in
the solar system. It could lead to major discoveries by using demonstrated
technologies. The mission proposes to perform a set of precision gravitation
experiments from the vicinity of Earth to the outer Solar System. Its
scientific objectives can be summarized as follows: i) test of the gravity
force law in the Solar System up to and beyond the orbit of Saturn; ii) precise
investigation of navigation anomalies at the fly-bys; iii) measurement of
Eddington's parameter at occultations; iv) mapping of gravity field in the
outer solar system and study of the Kuiper belt. To this aim, the Odyssey
mission is built up on a main spacecraft, designed to fly up to 13 AU, with the
following components: a) a high-precision accelerometer, with bias-rejection
system, measuring the deviation of the trajectory from the geodesics; b)
Ka-band transponders, as for Cassini, for a precise range and Doppler
measurement up to 13 AU, with additional VLBI equipment; c) optional laser
equipment, which would allow one to improve the range and Doppler measurement.
In this baseline concept, the main spacecraft is designed to operate beyond the
Saturn orbit, up to 13 AU. It experiences multiple planetary fly-bys at Earth,
Mars or Venus, and Jupiter. The cruise and fly-by phases allow the mission to
achieve its baseline scientific objectives (i) to iii) in the above list). In
addition to this baseline concept, the Odyssey mission proposes the release of
the Enigma radio-beacon at Saturn, allowing one to extend the deep space
gravity test up to at least 50 AU, while achieving the scientific objective of
a mapping of gravity field in the outer Solar System.


title: Analytic vectors in continuous p-adic representations

abstract:
  Given a compact p-adic Lie group G over a finite unramified extension L/Q_p
let G_0 be the product over all Galois conjugates of G. We construct an exact
and faithful functor from admissible G-Banach space representations to
admissible locally L-analytic G_0-representations that coincides with passage
to analytic vectors in case L=Q_p. On the other hand, we study the functor
"passage to analytic vectors" and its derived functors over general basefields.
As an application we determine the higher analytic vectors in certain locally
analytic induced representations.


title: Fermi momentum resolved charge order for spin disordered stripes

abstract:
  For a doped antiferromagnet with short-range spin stripe correlations and
long-range charge stripe order we find that the manifestation of charge order
changes abruptly as a function of momentum along the Fermi surface. The
disorder averaged local density of states is almost perfectly homogeneous when
integrated only over states which contribute to the ``nodal'' spectral weight
whereas it displays long range charge stripe order when integrated only over
states which contribute to the ``antinodal'' spectral weight. An effectively
two dimensional nodal liquid can thus coexist with static charge stripes
provided there is no static spin order. We also study commensurate spin and
charge stripe ordered systems where the Fermi surface consists of a nodal hole
pocket and an open ``stripe band'' section. Due to the stripe order the
relation between hole density and size of a pocket will be reduced compared to
a paramagnet by a factor of two for even charge period and four for odd charge
period and we find an estimated upper limit on the area fraction of a hole
pocket of 1.6% for charge period four and 4% for charge period five. We also
discuss why electron pockets are not expected for a stripe ordered system and
show that the open Fermi surface section may be electron like with a negative
Hall coefficient.


title: A Polynomial Time Algorithm for Graph Isomorphism

abstract:
  Algorithms testing two graphs for isomorphism known as yet in computer
science have exponential worst case complexity. In this paper we propose an
algorithm that has polynomial complexity and constructively supplies the
evidence that the graph isomorphism lies in P.


title: Arrival time in quantum field theory

abstract:
  Via the proper-time eigenstates (event states) instead of the proper-mass
eigenstates (particle states), free-motion time-of-arrival theory for massive
spin-1/2 particles is developed at the level of quantum field theory. The
approach is based on a position-momentum dual formalism. Within the framework
of field quantization, the total time-of-arrival is the sum of the single
event-of-arrival contributions, and contains zero-point quantum fluctuations
because the clocks under consideration follow the laws of quantum mechanics.


title:
A lower bound on the probability of error in quantum state
  discrimination

abstract:
  We give a lower bound on the probability of error in quantum state
discrimination. The bound is a weighted sum of the pairwise fidelities of the
states to be distinguished.


title:
A Conformally Invariant Approach to Estimation of Relations Between
  Physical Quantities

abstract:
  A.V.Pushkin's approach based on conformal geometrodynamics (CGD) to
calculation of quantitative relations between physical quantities is presented
and analyzed. In the simplest cases of the stationary solutions to the CGD
equations the approach implies separation of internal and external parts
(relative to a certain boundary) from the solutions and using inverse
transformations transforming the parts into each other. For the
quasi-stationary (metastable) states, the possibility of the nonperturbative
calculation of their lifetimes is shown. The approach is illustrated by several
examples. In particular, it is shown that the Dirac ``large number hypothesis''
is a consequence of the approach. Also, the evaluated radiation lifetime of the
first excited level of 2p hydrogen atom and neutron lifetime are presented.


title: AdS-QCD quark-antiquark potential, meson spectrum and tetraquarks

abstract:
  AdS/QCD correspondence predicts the structure of quark-antiquark potential in
the static limit. We use this piece of information together with the Salpeter
equation (Schr\"odinger equation with relativistic kinematics) and a short
range hyperfine splitting potential to determine quark masses and the quark
potential parameters from the meson spectrum. The agreement between theory and
experimental data is satisfactory provided one considers only mesons comprising
at least one heavy quark. We use the same potential (in the one-gluon-exchange
approximation) and these data to estimate constituent diquark masses. Using
these results as an input we compute tetraquark masses using a
diquark-antidiquark model. The masses of the states X(3872) or Y(3940) are
predicted rather accurately. We also compute tetraquark masses with open charm
and strangeness. Our result is that tetraquark candidates such as D_s(2317),
D_s(2457) or X(2632) can hardly be interpreted as diquark-antidiquark states
within the present approach.


title:
Observable Consequences of Planet Formation Models in Systems with
  Close-in Terrestrial Planets

abstract:
  To date, two planetary systems have been discovered with close-in,
terrestrial-mass planets (< 5-10 Earth masses). Many more such discoveries are
anticipated in the coming years with radial velocity and transit searches. Here
we investigate the different mechanisms that could form "hot Earths" and their
observable predictions. Models include: 1) in situ accretion; 2) formation at
larger orbital distance followed by inward "type 1" migration; 3) formation
from material being "shepherded" inward by a migrating gas giant planet; 4)
formation from material being shepherded by moving secular resonances during
dispersal of the protoplanetary disk; 5) tidal circularization of eccentric
terrestrial planets with close-in perihelion distances; and 6)
photo-evaporative mass loss of a close-in giant planet. Models 1-4 have been
validated in previous work. We show that tidal circularization can form hot
Earths, but only for relatively massive planets (> 5 Earth masses) with very
close-in perihelion distances (< 0.025 AU), and even then the net inward
movement in orbital distance is at most only 0.1-0.15 AU. For planets of less
than about 70 Earth masses, photo-evaporation can remove the planet's envelope
and leave behind the solid core on a Gyr timescale, but only for planets inside
0.025-0.05 AU. Using two quantities that are observable by current and upcoming
missions, we show that these models each produce unique signatures, and can be
observationally distinguished. These observables are the planetary system
architecture (detectable with radial velocities, transits and transit-timing)
and the bulk composition of transiting close-in terrestrial planets (measured
by transits via the planet's radius).


title: The Tip of the Red Giant Branch

abstract:
  I review the latest results on the calibration of the Tip of the Red Giant
Branch as a standard candle, in the optical and in the near infrared. The
agreement among different and independent empirical calibrations is rather
good, if all the uncertainties are taken into account. The possible extension
of the calibration to SDSS photometric bands (i,z) is also discussed.


title:
A 1.3 cm wavelength radio flare from a deeply embedded source in the
  Orion BN/KL region

abstract:
  Aims: Our aim was to measure and characterize the short-wavelength radio
emission from young stellar objects (YSOs) in the Orion Nebula Cluster and the
BN/KL star-forming region. Methods: We used the NRAO Very Large Array at a
wavelength of 1.3 cm and we studied archival X-ray, infrared, and radio data.
Results: During our observation, a strong outburst (flux increasing >10 fold)
occurred in one of the 16 sources detected at a wavelength of 1.3cm, while the
others remained (nearly) constant. This source does not have an infrared
counterpart, but has subsequently been observed to flare in X-rays. Curiously,
a very weak variable double radio source was found at other epochs near this
position, one of whose components is coincident with it. A very high extinction
derived from modeling the X-ray emission and the absence of an infrared
counterpart both suggest that this source is very deeply embedded.


title: Sterile neutrinos after the first MiniBooNE results

abstract:
  In view of the recent results from the MiniBooNE experiment we revisit the
global neutrino oscillation fit to short-baseline neutrino data by adding one,
two or three sterile neutrinos with eV-scale masses to the three Standard Model
neutrinos. We find that four-neutrino oscillations of the (3+1) type, which
have been only marginally allowed before the recent MiniBooNE results, become
even more disfavored with the new data. In the framework of so-called (3+2)
five-neutrino mass schemes the MiniBooNE results can be nicely reconciled with
the LSND appearance evidence thanks to the possibility of CP violation
available in such oscillation schemes; however, the tension between appearance
and disappearance experiments represents a serious problem in (3+2) schemes, so
that these models are ultimately not viable. This tension remains also when a
third sterile neutrino is added, and we do not find a significant improvement
of the global fit in a (3+3) scheme.


title: Hints of (trans-Planckian) asymptotic freedom in semiclassical cosmology

abstract:
  We employ the semiclassical approximation to the Wheeler-DeWitt equation in
the spatially flat de Sitter Universe to investigate the dynamics of a
minimally coupled scalar field near the Planck scale. We find that, contrary to
naive intuition, the effects of quantum gravitational fluctuations become
negligible and the scalar field states asymptotically approach plane-waves at
very early times. These states can then be used as initial conditions for the
quantum states of matter to show that each mode essentially originated in the
minimum energy vacuum. Although the full quantum dynamics cannot be solved
exactly for the case at hand, our results can be considered as supporting the
general idea of asymptotic safety in quantum gravity.


title: CP-violating Loop Effects in the Higgs Sector of the MSSM

abstract:
  CP-violating effects in the Higgs sector of the Minimal Supersymmetric
Standard Model with complex parameters (cMSSM) are induced by potentially large
higher-order corrections. As a consequence, all three neutral Higgs bosons can
mix with each other. Recent results for loop corrections in the Higgs sector of
the cMSSM are reviewed. Results for propagator-type corrections of O(alpha_t
alpha_s) and complete one-loop results for Higgs cascade decays of the kind h_a
-> h_b h_c are summarised, and the proper treatment of external Higgs bosons in
Higgs-boson production and decay processes is discussed.


title: A New Theory of Dynamic Arrest in Colloidal Mixtures

abstract:
  We present a new first-principles theory of dynamic arrest in colloidal
mixtures based on the multi-component self-consistent generalized Langevin
equation (SCGLE) theory of colloid dynamics [Phys. Rev. E {\bf 72}, 031107
(2005); ibid {\bf 76}, 039902 (2007)]. We illustrate its application with the
description of dynamic arrest in two simple model colloidal mixtures, namely,
the hard-sphere and the repulsive Yukawa binary mixtures. Our results include
the observation of the two patterns of dynamic arrest, one in which both
species become simultaneously arrested, and the other involving the sequential
arrest of the two species. The latter case gives rise to mixed states in which
one species is arrested while the other species remains mobile. We also derive
the ("fixed point") equations for the non-ergodic parameters of the system,
which takes the surprisingly simple form of a system of coupled equations for
the localization length of the particles of each species. The solution of this
system of equations indicates unambiguously which species is arrested (finite
localization length) and which species remains ergodic (infinite localization
length). As a result, we are able to draw the entire ergodic--non-ergodic phase
diagram of the binary hard-sphere mixture.


title: On the Critical Exponents for the \Lambda-Transition in Liquid Helium

abstract:
  The use of a new method for summing divergent series makes it possible to
significantly increase the accuracy of determining the critical exponents from
the field theoretical renormalization group. The exponent value \nu=0.6700\pm
0.0006 for the \lambda-transition in liquid helium is in good agreement with
the experiment, but contradicts the last theoretical results based on using
high-temperature series, the Monte Carlo method, and their synthesis.


title: Empirical Evaluation of Four Tensor Decomposition Algorithms

abstract:
  Higher-order tensor decompositions are analogous to the familiar Singular
Value Decomposition (SVD), but they transcend the limitations of matrices
(second-order tensors). SVD is a powerful tool that has achieved impressive
results in information retrieval, collaborative filtering, computational
linguistics, computational vision, and other fields. However, SVD is limited to
two-dimensional arrays of data (two modes), and many potential applications
have three or more modes, which require higher-order tensor decompositions.
This paper evaluates four algorithms for higher-order tensor decomposition:
Higher-Order Singular Value Decomposition (HO-SVD), Higher-Order Orthogonal
Iteration (HOOI), Slice Projection (SP), and Multislice Projection (MP). We
measure the time (elapsed run time), space (RAM and disk space requirements),
and fit (tensor reconstruction accuracy) of the four algorithms, under a
variety of conditions. We find that standard implementations of HO-SVD and HOOI
do not scale up to larger tensors, due to increasing RAM requirements. We
recommend HOOI for tensors that are small enough for the available RAM and MP
for larger tensors.


title:
A Chandra Study of the Rosette Star-Forming Complex. I. The Stellar
  Population and Structure of the Young Open Cluster NGC 2244

abstract:
  We present the first high spatial resolution Chandra X-ray study of NGC 2244,
the 2 Myr old stellar cluster immersed in the Rosette Nebula. Over 900 X-ray
sources are detected; 77% have optical or FLAMINGOS near-infrared (NIR) stellar
counterparts and are mostly previously uncatalogued young stellar cluster
members. All known OB stars with spectral type earlier than B1 are detected and
the X-ray selected stellar population is estimated to be nearly complete
between 0.5 and 3 Msun. The X-ray luminosity function (XLF) ranges from
29.4<logLx<32 ergs/s in the hard (2-8keV) band. By comparing the NGC 2244 and
Orion Nebula Cluster XLFs, we estimate a total population of 2000 stars in NGC
2244. A number of further results emerge from our analysis: The XLF and the
associated K-band luminosity function indicate a normal Salpeter initial mass
function (IMF) for NGC 2244. This is inconsistent with the top-heavy IMF
reported from earlier optical studies that lacked a good census of <4Msun
stars. The spatial distribution of X-ray stars is strongly concentrated around
the central O5 star, HD 46150. The other early O star, HD 46223, has few
companions. The cluster's stellar radial density profile shows two distinctive
structures. This double structure, combined with the absence of mass
segregation, indicates that this cluster is not in dynamical equilibrium. The
spatial distribution of X-ray selected K-excess disk stars and embedded stars
is asymmetric with an apparent deficit towards the north. The fraction of
X-ray-selected cluster members with K-band excesses caused by inner
protoplanetary disks is 6%, slightly lower than the 10% disk fraction estimated
from the FLAMINGOS study based on the NIR-selected sample. This is due to the
high efficiency of X-ray surveys in locating disk-free T Tauri stars.[Abridged]


title:
Quantum properties of counter-propagating two-photon states generated in
  a planar waveguide

abstract:
  A nonlinear planar waveguide pumped by a beam orthogonal to its surface may
serve as a versatile source of photon pairs. Changing pump-pulse duration,
pump-beam transverse width, and angular decomposition of pump-beam frequencies
characteristics of a photon pair including spectral widths of signal and idler
fields, their time durations as well as degree of entanglement of two fields
can be changed significantly. Using the measured spectral widths of the
down-converted fields and width of a coincidence-count dip in a Hong-Ou-Mandel
interferometer entropy of entanglement can be determined.


title: Galaxy Counts at 24 Microns in the SWIRE Fields

abstract:
  This paper presents galaxy source counts at 24 microns in the six Spitzer
Wide-field InfraRed Extragalactic (SWIRE) fields. The source counts are
compared to counts in other fields, and to model predictions that have been
updated since the launch of Spitzer. This analysis confirms a very steep rise
in the Euclidean-normalized differential number counts between 2 mJy and 0.3
mJy. Variations in the counts between fields show the effects of sample
variance in the flux range 0.5-10 mJy, up to 100% larger than Poisson errors.
Nonetheless, a "shoulder" in the normalized counts persists at around 3 mJy.
The peak of the normalized counts at 0.3 mJy is higher and narrower than most
models predict. In the ELAIS N1 field, the 24 micron data are combined with
Spitzer-IRAC data and five-band optical imaging, and these bandmerged data are
fit with photometric redshift templates. Above 1 mJy the counts are dominated
by galaxies at z less than 0.3. By 300 microJy, about 25% are between z ~
0.3-0.8, and a significant fraction are at z ~ 1.3-2. At low redshifts the
counts are dominated by spirals, and starbursts rise in number density to
outnumber the spirals' contribution to the counts below 1 mJy.


title:
The ignition process in type Ia supernovae: numerical simulations of
  core temperature perturbations

abstract:
  The onset of the thermonuclear runaway in a Chandrasekhar-mass white dwarf,
leading to the explosion as a type Ia supernova, is studied with hydrodynamical
simulations. We investigate the evolution of temperature fluctuations
(``bubbles'') in the WD's convective core by means of 2D numerical simulations.
We show how the occurrence of the thermonuclear runaway depends on various
bubble parameters. The relevance of the progenitor's composition for the
ignition process is also discussed.


title: Eight new MSPs in NGC 6440 and NGC 6441

abstract:
  We report the discovery of five new millisecond pulsars in the globular
cluster NGC 6440 and three new ones in NGC 6441; each cluster has one
previously known pulsar. Four of the new pulsars are found in binary systems.
One of the new pulsars, PSR J1748-2021B in NGC 6440, is notable for its
eccentric (e = 0.57) and wide (P_b = 20.5 days) orbit. If the rate of advance
of periastron is due solely to general relativity, we can estimate of the total
mass of this binary system: 2.92 +/- 0.20 solar masses. This would imply an
anomalously large mass for this pulsar, which could introduce important
constraints in the study of the equation of state for cold neutron matter.


title: Multifractality and intermediate statistics in quantum maps

abstract:
  We study multifractal properties of wave functions for a one-parameter family
of quantum maps displaying the whole range of spectral statistics intermediate
between integrable and chaotic statistics. We perform extensive numerical
computations and provide analytical arguments showing that the generalized
fractal dimensions are directly related to the parameter of the underlying
classical map, and thus to other properties such as spectral statistics. Our
results could be relevant for Anderson and quantum Hall transitions, where wave
functions also show multifractality.


abstract:
  In this paper we will review Exciton Spin Dynamics in Semiconductor Quantum
Wells. The spin properties of excitons in nanostructures are determined by
their fine structure. We will mainly focus in this review on GaAs and InGaAs
quantum wells which are model systems.


title: Construction of spectral functions for medium nuclei

abstract:
  This article is aimed at improving the description of lepton-nucleus
interactions in the sub-GeV energy range. Approximate spectral functions for
oxygen, calcium, and argon are constructed and used to obtain the electron
cross sections in a given scattering angle. Comparison with a sample of
available experimental data shows satisfactory agreement. Discrepancy between
the presented model and the systematic computations available for oxygen [O.
Benhar et al., Phys. Rev. D 72, 053005 (2005)] is also found to be very small.
Analysis of appropriate kinematical regions leads to the conclusion that the
obtained argon spectral function should describe well neutrino scattering in
the 800-MeV energy region. Several approximations used in the model are
critically reviewed. All the details needed to implement the presented approach
in Monte Carlo simulations are given.


title: A Constrained Nevanlinna-Pick Interpolation Problem

abstract:
  We obtain necessary and sufficient conditions for Nevanlinna-Pick
interpolation on the unit disk with the additional restriction that all
analytic interpolating functions satisfy $f'(0)=0.$ Alternatively, these
results can be interpreted as interpolation results for $H^{\infty}(V),$ where
$V$ is the intersection of the bidisk with an algebraic variety. We use an
analysis of C*-envelopes to show that these same conditions do not suffice for
matrix interpolation.


title: Transverse geometry and physical observers

abstract:
  It is proposed that the mathematical formalism that is most appropriate for
the study of spatially non-integrable cosmological models is the transverse
geometry of a one-dimensional foliation (congruence) defined by a physical
observer. By that means, one can discuss the geometry of space, as viewed by
that observer, without the necessity of introducing a complementary sub-bundle
to the line bundle of the observer or a codimension-one foliation transverse to
the foliation of the observer. The concept of groups of transverse isometries
acting on such a spacetime and the relationship of transverse geometry to
spacetime threadings (1+3 decompositions) is also discussed.


title: Dynamic load-balancing on multi-FPGA systems: a case study

abstract:
  In this case study, we investigate the impact of workload balance on the
performance of multi-FPGA codes. We start with an application in which two
distinct kernels run in parallel on two SRC-6 MAP processors. We observe that
one of the MAP processors is idle 18% of the time while the other processor is
fully utilized. We investigate a task redistribution schema which serializes
the execution of the two kernels, yet parallelizes execution of each individual
kernel by spreading the workload between two MAP processors. This
implementation results in a near 100% utilization of both MAP processors and
the overall application performance is improved by 9%.


title: Kac-Moody Spectrum of (Half-)Maximal Supergravities

abstract:
  We establish the correspondence between, on one side, the possible gaugings
and massive deformations of half-maximal supergravity coupled to vector
multiplets and, on the other side, certain generators of the associated very
extended Kac-Moody algebras. The difference between generators associated to
gaugings and to massive deformations is pointed out. Furthermore, we argue that
another set of generators are related to the so-called quadratic constraints of
the embedding tensor. Special emphasis is placed on a truncation of the
Kac-Moody algebra that is related to the bosonic gauge transformations of
supergravity. We give a separate discussion of this truncation when non-zero
deformations are present. The new insights are also illustrated in the context
of maximal supergravity.


title: Solvmanifolds and noncommutative tori with real multiplication

abstract:
  We prove that the Shimizu L-function of a real quadratic field is obtained
from a (Lorentzian) spectral triple on a noncommutative torus with real
multiplication, as an adiabatic limit of the Dirac operator on a 3-dimensional
solvmanifold. The Dirac operator on this 3-dimensional geometry gives, via the
Connes-Landi isospectral deformations, a spectral triple for the noncommutative
tori obtained by deforming the fiber tori to noncommutative spaces. The
3-dimensional solvmanifold is the homotopy quotient in the sense of
Baum--Connes of the noncommutative space obtained as the crossed product of the
noncommutative torus by the action of the units of the real quadratic field.
This noncommutative space is identified with the twisted group C*-algebra of
the fundamental group of the 3-manifold. The twisting can be interpreted as the
cocycle arising from a magnetic field, as in the theory of the quantum Hall
effect. We prove a twisted index theorem that computes the range of the trace
on the K-theory of this noncommutative space and gives an estimate on the gaps
in the spectrum of the associated Harper operator.


title:
Splitting for Rare Event Simulation: A Large Deviation Approach to
  Design and Analysis

abstract:
  Particle splitting methods are considered for the estimation of rare events.
The probability of interest is that a Markov process first enters a set $B$
before another set $A$, and it is assumed that this probability satisfies a
large deviation scaling. A notion of subsolution is defined for the related
calculus of variations problem, and two main results are proved under mild
conditions. The first is that the number of particles generated by the
algorithm grows subexponentially if and only if a certain scalar multiple of
the importance function is a subsolution. The second is that, under the same
condition, the variance of the algorithm is characterized (asymptotically) in
terms of the subsolution. The design of asymptotically optimal schemes is
discussed, and numerical examples are presented.


title: Astrophysical Bounds on the Photon Charge and Magnetic Moment

abstract:
  If the photon possessed an electric charge or a magnetic moment, light waves
propagating through magnetic fields would acquire new quantum mechanical
phases. For a charged photon, this is an Aharonov-Bohm phase, and the fact that
we can resolve distant galaxies using radio interferometry indicates that this
phase must be small. This in turn constrains the photon charge to be smaller
that 10^(-32) e if all photons have the same charge and smaller than 10^(-46) e
if there are both positively and negatively charged photons. The best bound on
the magnetic moment comes from the observed absence of wavelength-independent
photon birefringence. Birefringence measurements, which compare the relative
phases of right- and left-circularly polarized waves, restrict the magnetic
moment to be less than 10^(-24) e cm. This is just a few orders of magnetude
weaker than the experimental bounds on the electron and neutron electric dipole
moments.


title: Fine Grid Asteroseismology of R548 and G117-B15A

abstract:
  We now have a good measurement of the cooling rate of G117-B15A. In the near
future, we will have equally well determined cooling rates for other pulsating
white dwarfs, including R548. The ability to measure their cooling rates offers
us a unique way to study weakly interacting particles that would contribute to
their cooling. Working toward that goal, we perform a careful
asteroseismological analysis of G117-B15A and R548. We study them side by side
because they have similar observed properties. We carry out a systematic, fine
grid search for best fit models to the observed period spectra of those stars.
We freely vary 4 parameters: the effective temperature, the stellar mass, the
helium layer mass, and the hydrogen layer mass. We identify and quantify a
number of uncertainties associated with our models. Based on the results of
that analysis and fits to the periods observed in R548 and G117-B15A, we
clearly define the regions of the 4 dimensional parameter space ocuppied by the
best fit models.


title: Slow-light effect in dual-periodic photonic lattice

abstract:
  We present analytical and numerical study of photonic lattice with short- and
long-range harmonic modulations of the refractive index. Such structures can be
prepared experimentally with holographic photolithography. In the spectral
region of photonic bandgap of the underlying single-periodic crystal, we
observe a series of bands with anomalously small dispersion. The related
slow-light effect is attributed to the long-range modulation in the photonic
lattice, that leads to formation of an array of evanescently-coupled high-$Q$
cavities. The band structure of the lattice is studied with several techniques:
(i) transfer matrix approach; (ii) analysis of resonant coupling in process of
band folding; (iii) effective medium approach based on coupled-mode theory; and
(iv) Bogolyubov-Mitropolsky approach. The latter method, commonly used in the
studies of nonlinear oscillators, was employed to investigate the behavior of
the eigen-function envelopes and the band structure of our dual-periodic
photonic lattice. We show that reliable results can be obtained even in the
case of large refractive index modulation.


title: Strong limits on the DFSZ axion mass with G117-B15A

abstract:
  We compute rates of period change (Pdots) for the 215s mode in G117-B15A and
the 213s mode in R548, first for models without axions, and then for models
with axions of increasing mass. We use the asteroseismological models for
G117-B15A and R548 we derived in an earlier publication . For G117-B15A, we
consider two families of solutions, one with relatively thick hydrogen layers
and one with thin hydrogen layers. Given the region of parameter space occupied
by our models, we estimate error bars on the calculated Pdots using Monte Carlo
simulations. Together with the observed Pdot for G117-B15A, our analysis yields
strong limits on the DFSZ axion mass. Our thin hydrogen solutions place an
upper limit of 13.5 meV on the axion, while our thick hydrogen solutions
relaxes that limit to 26.5 meV.


title: A pseudo-parallel Python environment for database curation

abstract:
  One of the major challenges providing large databases like the WFCAM Science
Archive (WSA) is to minimize ingest times for pixel/image metadata and
catalogue data. In this article we describe how the pipeline processed data are
ingested into the database as the first stage in building a release database
which will be succeeded by advanced processing (source merging, seaming,
detection quality flagging etc.). To accomplish the ingestion procedure as fast
as possible we use a mixed Python/C++ environment and run the required tasks in
a simple parallel modus operandi where the data are split into daily chunks and
then processed on different computers. The created data files can be ingested
into the database immediately as they are available. This flexible way of
handling the data allows the most usage of the available CPUs as the comparison
with sequential processing shows.


title: Poisson and symplectic functions in Lie algebroid theory

abstract:
  Emphasizing the role of Gerstenhaber algebras and of higher derived brackets
in the theory of Lie algebroids, we show that the several Lie algebroid
brackets which have been introduced in the recent literature can all be defined
in terms of Poisson and pre-symplectic functions in the sense of Roytenberg and
Terashima. We prove that in this very general framework there exists a
one-to-one correspondence between non-degenerate Poisson functions and
symplectic functions. We determine the differential associated to a Lie
algebroid structure obtained by twisting a structure with background by both a
Lie bialgebra action and a Poisson bivector.


title:
Secondary Cosmic Ray particles due to GCR interactions in the Earth's
  atmosphere

abstract:
  Primary GCR interact with the Earth's atmosphere originating atmospheric
showers, thus giving rise to fluxes of secondary particles in the atmosphere.
Electromagnetic and hadronic interactions interplay in the production of these
particles, whose detection is performed by means of complementary techniques in
different energy ranges and at different depths in the atmosphere, down to the
Earth's surface.
  Monte Carlo codes are essential calculation tools which can describe the
complexity of the physics of these phenomena, thus allowing the analysis of
experimental data. However, these codes are affected by important
uncertainties, concerning, in particular, hadronic physics at high energy. In
this paper we shall report some results concerning inclusive particle fluxes
and atmospheric shower properties as obtained using the FLUKA transport and
interaction code. Some emphasis will also be given to the validation of the
physics models of FLUKA involved in these calculations.


title: An infrared study of the double nucleus in NGC3256

abstract:
  We present new resolved near and mid-IR imaging and N-band spectroscopy of
the two nuclei in the merger system NGCA3256, the most IR luminous galaxy in
the nearby universe. The results from the SED fit to the data are consistent
with previous estimates of the amount of obscuration towards the nuclei and the
nuclear star formation rates. However, we also find substantial differences in
the infrared emission from the two nuclei which cannot be explained by
obscuration alone. We conclude that the northern nucleus requires an additional
component of warm dust in order to explain its properties. This suggests that
local starforming conditions can vary significantly within the environment of a
single system.


title: Neutrino self-energy in a magnetized charge-symmetric medium

abstract:
  In this talk we present the calculation of the neutrino self-energy in
presence of a magnetized medium. The magnetized medium consists of electrons,
positrons, neutrinos and a uniform classical magnetic field. The background
magnetic field is assumed to be weak compared to the $W$-Boson mass as a
consequence of which only linear order corrections in the field are included in
the $W$ boson propagator. The electron propagator consists all order
corrections in the background field. Our calculation is specifically suited for
situations where the background plasma may be CP symmetric.


title: Observation of Y(3940) -> J/psi omega in B -> J/psi omega K at BABAR

abstract:
  We present a study of the decays $B^{0,+}\to J/\psi\omega K^{0,+}$ using
$383\times 10^{6}$ $B\bar{B}$ events obtained with the \babar detector at
PEP-II. We observe $Y(3940) \to J/\psi \omega$, with mass $3914.6
^{+3.8}_{-3.4} (stat) \pm{2.0} (syst)$ \mevcc, and width
$34^{+12}_{-8}(stat)\pm{5}(syst)$ \mev. The ratio of $B^0$ and $B^+$ decay to
$YK$ is $0.27^{+0.28}_{-0.23}(stat)^{+0.04}_{-0.01}(syst)$, and the relevant
$B^0$ and $B^+$ branching fractions are reported.


title: Nucleon Structure from Lattice QCD

abstract:
  Recent advances in lattice field theory, in computer technology and in chiral
perturbation theory have enabled lattice QCD to emerge as a powerful
quantitative tool in understanding hadron structure. I describe recent progress
in the computation of the nucleon form factors and moments of parton
distribution functions, before proceeding to describe lattice studies of the
Generalized Parton Distributions (GPDs). In particular, I show how lattice
studies of GPDs contribute to building a three-dimensional picture of the
proton. I conclude by describing the prospects for studying the structure of
resonances from lattice QCD.


title: The role of the atom-cavity detuning in bimodal cavity experiments

abstract:
  The coherent evolution of the atom-cavity state in bimodal (cavity)
experiments has been analyzed for a realistic time-dependence in detuning the
atomic transition frequency. Apart from a `smooth switch' of the atomic
resonance from one to the second mode of a bimodal cavity, we considered also
an additional (effective) interaction between the field modes of the cavity,
known as `communication channel'. Comparison of our model computations has been
made especially with the measurements by Rauschenbeutel et al., [2001 Phys.
Rev. A 64 050301] who demonstrated for the first time the entanglement of the
field modes in a bimodal cavity. It is shown that the agreement between the
(theoretically) predicted and experimental phase shifts can be improved by
allowing a `communication' between the two field modes during a short but
finite switch of the atomic transition frequency from one mode to the other. We
therefore suggest that the details of the atom-cavity detuning should be taken
into account for the future interpretation of bimodal cavity experiments.


title: Two Families of Quantum Codes Derived from Cyclic Codes

abstract:
  We characterize the affine-invariant maximal extended cyclic codes. Then by
the CSS construction, we derive from these codes a family of pure quantum
codes. Also for ordnq even, a new family of degenerate quantum stabilizer codes
is derived from the classical duadic codes. This answer an open problem asked
by Aly et al.


title:
Comment on`` Angular dependence of Dicke-narrowed electromagnetically
  induced transparency resonances''

abstract:
  We demonstrate that the experimental results reported by M. Shuker, O.
Firstenberg, R. Pugatch, A. Ben-Kish,1 A. Ron, and N. Davidson, Phys. Rev. A
{\bf 76}, 023813 (2007) as Dicke narrowing of electromagnetically induced
transparency, does not match with theory.


title:
Computation and visualization of photonic quasicrystal spectra via
  Blochs theorem

abstract:
  Previous methods for determining photonic quasicrystal (PQC) spectra have
relied on the use of large supercells to compute the eigenfrequencies and/or
local density of states (LDOS). In this manuscript, we present a method by
which the energy spectrum and the eigenstates of a PQC can be obtained by
solving Maxwells equations in higher dimensions for any PQC defined by the
standard cut-and-project construction, to which a generalization of Blochs
theorem applies. In addition, we demonstrate how one can compute band
structures with defect states in the higher-dimensional superspace with no
additional computational cost. As a proof of concept, these general ideas are
demonstrated for the simple case of one-dimensional quasicrystals, which can
also be solved by simple transfer-matrix techniques.