title: Quantum Structure in Cognition

abstract:
  The broader scope of our investigations is the search for the way in which
concepts and their combinations carry and influence meaning and what this
implies for human thought. More specifically, we examine the use of the
mathematical formalism of quantum mechanics as a modeling instrument and
propose a general mathematical modeling scheme for the combinations of
concepts. We point out that quantum mechanical principles, such as
superposition and interference, are at the origin of specific effects in
cognition related to concept combinations, such as the guppy effect and the
overextension and underextension of membership weights of items. We work out a
concrete quantum mechanical model for a large set of experimental data of
membership weights with overextension and underextension of items with respect
to the conjunction and disjunction of pairs of concepts, and show that no
classical model is possible for these data. We put forward an explanation by
linking the presence of quantum aspects that model concept combinations to the
basic process of concept formation. We investigate the implications of our
quantum modeling scheme for the structure of human thought, and show the
presence of a two-layer structure consisting of a classical logical layer and a
quantum conceptual layer. We consider connections between our findings and
phenomena such as the disjunction effect and the conjunction fallacy in
decision theory, violations of the sure thing principle, and the Allais and
Elsberg paradoxes in economics.


title: Entomogenic Climate Change

abstract:
  Rapidly expanding insect populations, deforestation, and global climate
change threaten to destabilize key planetary carbon pools, especially the
Earth's forests which link the micro-ecology of insect infestation to climate.
To the extent mean temperature increases, insect populations accelerate
deforestation. This alters climate via the loss of active carbon sequestration
by live trees and increased carbon release from decomposing dead trees. A
positive feedback loop can emerge that is self-sustaining--no longer requiring
independent climate-change drivers. Current research regimes and insect control
strategies are insufficient at present to cope with the present regional scale
of insect-caused deforestation, let alone its likely future global scale.
Extensive field recordings demonstrate that bioacoustic communication plays a
role in infestation dynamics and is likely to be a critical link in the
feedback loop. These results open the way to novel detection and monitoring
strategies and nontoxic control interventions.


title:
Hartree-Fock study of electronic ferroelectricity in the Falicov-Kimball
  model with $f$-$f$ hopping

abstract:
  The Hartree-Fock (HF) approximation with the charge-density-wave (CDW)
instability is used to study the ground-state phase diagram of the spinless
Falicov-Kimball model (FKM) extended by $f$-$f$ hopping in two and three
dimensions. It is shown that the HF solutions with the CDW instability
reproduce perfectly the two-dimensional intermediate coupling phase diagram of
the FKM model with $f$-$f$ hopping calculated recently by constrained path
Monte Carlo (CPMC) method. Using this fact we have extended our HF study on
cases that have been not described by CPMC, and namely, (i) the case of small
values of $f$-electron hopping integrals, (ii) the case of weak Coulomb
interactions and (iii) the three-dimensional case. We have found that
ferroelectricity remains robust with respect to the reducing strength of
coupling ($f$-electron hopping) as well as with respect to the increasing
dimension of the system.


title:
Generalized Chinese restaurant construction of exchangeable Gibbs
  partitions and related results

abstract:
  By resorting to sequential constructions of exchangeable random partitions
(Pitman, 2006), and exploiting some known facts about generalized Stirling
numbers, we derive a generalized Chinese restaurant process construction of
exchangeable Gibbs partitions of type $\alpha$ (Gnedin and Pitman, 2006). Our
construction represents the natural theoretical probabilistic framework in
which to embed some recent results about a Bayesian nonparametric treatment of
estimation problems arising in genetic experiment under Gibbs, species
sampling, models priors.


title: Single Atom Detection With Optical Cavities

abstract:
  We present a thorough analysis of single atom detection using optical
cavities. The large set of parameters that influence the signal-to-noise ratio
for cavity detection is considered, with an emphasis on detunings, probe power,
cavity finesse and photon detection schemes. Real device operating restrictions
for single photon counting modules and standard photodiodes are included in our
discussion, with heterodyne detection emerging as the clearly favourable
technique, particularly for detuned detection at high power.


title: The single degenerate channel for the progenitor of type Ia supernovae

abstract:
  We have carried out a detailed study of the single-degenerate channel for the
progenitors of type Ia supernovae (SNe Ia). In the model, a carbon-oxygen white
dwarf (CO WD) accretes hydrogen-rich material from an unevolved or a slightly
evolved non-degenerate companion to increase its mass to Chandrasekhar mass
limit. Incorporating the prescription of \cite{HAC99a} for the accretion
efficiency into Eggleton's stellar evolution code and assuming that the
prescription is valid for all metallicities, we performed binary stellar
evolution calculations for more than 25,000 close WD binary systems with
various metallicities. The initial parameter spaces for SNe Ia are presented in
an orbital period-secondary mass ($\log P_{\rm i}, M_{\rm 2}^{\rm i}$) plane
for each $Z$.
  Adopting the results above, we studied the birth rate of SNe Ia for various
$Z$ via binary population synthesis. From the study, we see that for a high
$Z$, SNe Ia occur systemically earlier and the peak value of the birth rate is
larger if a single starburst is assumed. The Galactic birth rate from the
channel is lower than (but comparable to) that inferred from observations.
  We also showed the distributions of the parameters of the binary systems at
the moment of supernova explosion and the distributions of the properties of
companions after supernova explosion. The former provides physics input to
simulate the interaction between supernova ejecta and its companion, and the
latter is helpful to search for the companions in supernova remnants.


title: On the error term in Weyl's law for the Heisenberg manifolds

abstract:
  For a fixed integer $l\geq 1$, let $R(t)$ denote the error term in the Weyl's
law of a $(2l+1)$-dimensional Heisenberg manifold with the metric $g_l.$ In
this paper we shall prove the asymptotic formula of the $k$-th power moment for
any integers $3\leq k\leq 9.$ We shall also prove that the function
$t^{-(l-1/4)}R(t)$ has a distribution function.


title: Imaging and Dynamics of Light Atoms and Molecules on Graphene

abstract:
  Observing the individual building blocks of matter is one of the primary
goals of microscopy. The invention of the scanning tunneling microscope [1]
revolutionized experimental surface science in that atomic-scale features on a
solid-state surface could finally be readily imaged. However, scanning
tunneling microscopy has limited applicability due to restrictions, for
example, in sample conductivity, cleanliness, and data aquisition rate. An
older microscopy technique, that of transmission electron microscopy (TEM) [2,
3] has benefited tremendously in recent years from subtle instrumentation
advances, and individual heavy (high atomic number) atoms can now be detected
by TEM [4 - 7] even when embedded within a semiconductor material [8, 9].
However, detecting an individual low atomic number atom, for example carbon or
even hydrogen, is still extremely challenging, if not impossible, via
conventional TEM due to the very low contrast of light elements [2, 3, 10 -
12]. Here we demonstrate a means to observe, by conventional transmision
electron microscopy, even the smallest atoms and molecules: On a clean
single-layer graphene membrane, adsorbates such as atomic hydrogen and carbon
can be seen as if they were suspended in free space. We directly image such
individual adatoms, along with carbon chains and vacancies, and investigate
their dynamics in real time. These techniques open a way to reveal dynamics of
more complex chemical reactions or identify the atomic-scale structure of
unknown adsorbates. In addition, the study of atomic scale defects in graphene
may provide insights for nanoelectronic applications of this interesting
material.


title: A New Type of Cipher: DICING_csb

abstract:
  In this paper, we will propose a new type of cipher named DICING_csb, which
is derived from our previous stream cipher DICING. It has applied a stream of
subkey and an encryption form of block ciphers, so it may be viewed as a
combinative of stream cipher and block cipher. Hence, the new type of cipher
has fast rate like a stream cipher and need no MAC.


title: Principle of Local Conservation of Energy-Momentum

abstract:
  Starting with Einstein's theory of special relativity and the principle that
whenever a celestial body or an elementary particle, subjected only to the
fundamental forces of nature, undergoes a change in its kinetic energy then the
mass-energy equivalent of that kinetic energy must be subtracted from the
rest-mass of the body or particle, we derive explicit equations of motion for
two falling bodies. In the resulting mathematical theory we find that there are
no singularities and consequently no blackholes.


title:
Polarization phase matrices for radiation scattering on atoms in
  external magnetic fields: The case of forbidden transitions in astrophysics

abstract:
  Using a quantum electrodynamical approach, we derive the scattering phase
matrices for polarized radiation involving forbidden line transitions and in
the presence of an external magnetic field. The case of (J=0->2->0) scattering
is considered as an example. The non-magnetic Rayleigh scattering phase matrix
is also presented. The Stokes profiles in a single scattering event are
computed for the strong field (Zeeman) and weak field (Hanle) limits, covering
also the regime of intermediate field strengths (Hanle- Zeeman).


title: Life-Space Foam: a Medium for Motivational and Cognitive Dynamics

abstract:
  General stochastic dynamics, developed in a framework of Feynman path
integrals, have been applied to Lewinian field--theoretic psychodynamics,
resulting in the development of a new concept of life--space foam (LSF) as a
natural medium for motivational and cognitive psychodynamics. According to LSF
formalisms, the classic Lewinian life space can be macroscopically represented
as a smooth manifold with steady force-fields and behavioral paths, while at
the microscopic level it is more realistically represented as a collection of
wildly fluctuating force-fields, (loco)motion paths and local geometries (and
topologies with holes). A set of least-action principles is used to model the
smoothness of global, macro-level LSF paths, fields and geometry. To model the
corresponding local, micro-level LSF structures, an adaptive path integral is
used, defining a multi-phase and multi-path (multi-field and multi-geometry)
transition process from intention to goal-driven action. Application examples
of this new approach include (but are not limited to) information processing,
motivational fatigue, learning, memory and decision-making.


title:
Generic estimates for magnetic fields generated during inflation
  including Dirac-Born-Infeld theories

abstract:
  We estimate the strength of large-scale magnetic fields produced during
inflation in the framework of Dirac-Born-Infeld (DBI) theories. This analysis
is sufficiently general in the sense that it covers most of conformal symmetry
breaking theories in which the electromagnetic field is coupled to a scalar
field. In DBI theories there is an additional factor associated with the speed
of sound, which allows a possibility to lead to an extra amplification of the
magnetic field in a ultra-relativistic region. We clarify the conditions under
which seed magnetic fields to feed the galactic dynamo mechanism at a
decoupling epoch as well as present magnetic fields on galactic scales are
sufficiently generated to satisfy observational bounds.


title: A vanishing theorem for log canonical pairs

abstract:
  Using inversion of adjunction, we deduce from Nadel's theorem a vanishing
property for ideals sheaves on projective varieties, a special case of which
recovers a result due to Bertram--Ein--Lazarsfeld. This enables us to
generalize to a large class of projective schemes certain bounds on
Castelnuovo--Mumford regularity previously obtained by Bertram--Ein--Lazarsfeld
in the smooth case and by Chardin--Ulrich for locally complete intersection
varieties with rational singularities. Our results are tested on several
examples.


title: Derivation of Dielectric Model of Confinement in QCD

abstract:
  Phenomenological model for confining Lagrangian based on the perfect
dia-electric property of the vacuum of QCD, proposed by Kogut-Susskind and by
't Hooft, is derived by the stability of the condensed vacuum.


title:
Relativistic corrections to the Zeeman splitting of hyperfine structure
  levels in two-fermion bound-state systems

abstract:
  A relativistic theory of the Zeeman splitting of hyperfine levels in
two-fermion systems is presented. The approach is based on the variational
equation for bound states derived from quantum electrodynamics [1].
Relativistic corrections to the g-factor are obtained up to O(alpha^2).
Calculations are provided for all quantum states and for arbitrary fermionic
mass ratio. In the one-body limit our calculations reproduce the formula for
the g-factor (to O((Z*alpha)^2)) obtained from the Dirac equation. The results
will be useful for comparison with high-precision measurements.


title: Results from Upsilon(5S) at Belle: Strange Beauty and other Beasts

abstract:
  The Belle experiment collected in 2005-6 a total of 23.6 fb$^{-1}$ of data at
the $\Upsilon(10860)$ resonance, also known as $\Upsilon$(5S). These constitute
nearly all of the world's sample of $e^+e^- \to \Upsilon$(10860) events, which
provide clean $B_s$ pairs. We present here several $B_s$ and $\Upsilon$(10860)
properties recently extracted from these data.


title: Correlation in states of two identical particles

abstract:
  We identify the correlation in a state of two identical particles as the
residual information beyond what is already contained in the 1-particle reduced
density matrix, and propose a correlation measure based on the maximum entropy
principle. We obtain the analytical results of the correlation measure, which
make it computable for arbitrary two-particle states. We also show that the
degrees of correlation in the same two-particle states with different particle
types will decrease in the following order: bosons, fermions, and
distinguishable particles.


title: A hypothesis of earth quake

abstract:
  Without a model, it is impossible for a geophysicist to study the possibility
of forecasting earth quakes. We will define a quantity, the event-degree, in
the paper. This quantity plays an important role in the model of quakes
forecasting. In order to make a simple model, we make a hypothesis of earth
quakes. The hypothesis is: "(i) There are two kinds of earth quakes, one is the
triggered breaking (earth quake), the other is spontaneous breaking (earth
quake). (ii) Most major quakes in continental plates such as Eurasian Plate,
North America Plate, South America Plate, Africa Plate and Australia Plate are
triggered breaking. (iii) These triggered quakes are triggered by the evolution
of high pressure centers and low pressure centers of the atmosphere on the
plates. (iv) How can the evolution of the high pressure centers trigger a quake
in quantitative sense? It depends on the event-degree, the extent of the high
pressure center, the rate of evolution of event-degree and the the degree of
stored energy for reaching breaking point."


title:
Gamma convergence of an energy functional related to the fractional
  Laplacian

abstract:
  We prove a Gamma-convergence result for an energy functional related to some
fractional powers of the Laplacian operator, with two singular perturbations
(one in the interior and one on the boundary).


title:
Stability of the density-wave state of a dipolar condensate in a pancake
  trap

abstract:
  We study a dipolar boson-fermion mixture in a pancake geometry at absolute
zero temperature, generalizing our previous work on the stability of polar
condensates and the formation of a density-wave state in cylindrical traps.
After examining the dependence of the polar condensate stability on the
strength of the fermion-induced interaction, we determine the transition point
from a ground-state Gaussian to a hexagonal density-wave state. We use a
variational principle to analyze the stability properties of those density-wave
state.


title:
Measurement of charm and bottom production in p+p collisions at
  $\sqrt{s}$ = 200 GeV at RHIC-PHENIX

abstract:
  RHIC-PHENIX has observed a large suppression pattern and azimuthal anisotropy
of non-photonic electron at mid-rapidity ($\mid\eta\mid<0.35$) in Au+Au
collisions at $\sqrt{s_{NN}} = 200$ GeV. To understand these results and the
interaction of heavy quarks in the hot and dense medium, experimental
determination of production ratio of charm over bottom is one of the most
important topics, since the behavior of bottom may differ from charm in the
medium. We measured the ratio of charm over bottom and total cross section of
bottom via partial reconstruction of D$^0$$\to$e$^+$ K$^-$ $\nu_e$ decay in p+p
collisions at $\sqrt{s} = 200$ GeV. Total cross sections of charm and bottom
were also measured via di-electron continuum in p+p collisions at $\sqrt{s} =
200$ GeV.


title: On calculation of vector spin chirality for zigzag spin chains

abstract:
  We calculate the vector spin chirality for $S=1/2$ zigzag spin chains having
U(1) symmetry, using the density matrix renormalization group combined with
unitary transformation. We then demonstrate the occurrence of the chiral order
for the zigzag XY chain and discuss the associated phase transition. The
results are consistent with the analysis based on the bosonization and the long
distance behaviour of the chirality correlation function. For the $S=1/2$
zigzag Heisenberg chain in a magnetic field, we also verify the chiral order
that is predicted by the effective field theory and the chirality correlation
function, and then determine its magnetic phase diagram.


title: Weak Cosmic Censorship: As Strong as Ever

abstract:
  Spacetime singularities that arise in gravitational collapse are always
hidden inside of black holes. This is the essence of the weak cosmic censorship
conjecture. The hypothesis, put forward by Penrose 40 years ago, is still one
of the most important open questions in general relativity. In this Letter, we
reanalyze extreme situations which have been considered as counterexamples to
the weak cosmic censorship conjecture. In particular, we consider the
absorption of scalar particles with large angular momentum by a black hole.
Ignoring back reaction effects may lead one to conclude that the incident wave
may overspin the black hole, thereby exposing its inner singularity to distant
observers. However, we show that when back reaction effects are properly taken
into account, the stability of the black-hole event horizon is irrefutable. We
therefore conclude that cosmic censorship is actually respected in this type of
gedanken experiments.


title: Around the Pair Instability Valley - Massive SN Progenitors

abstract:
  The discovery of the extremely luminous supernova SN 2006gy, possibly
interpreted as a pair instability supernova, renewed the interest in very
massive stars. We explore the evolution of these objects, which end their life
as pair instability supernovae or as core collapse supernovae with relatively
massive iron cores, up to about $3 M_\odot$.


title:
Superconducting phase formation in random neck syntheses: a study of the
  Y-Ba-Cu-O system by magneto-optics and magnetometry

abstract:
  Magneto-optical imaging and magnetization measurements were applied to
investigate local formation of superconducting phase effected by a random neck
synthesis in Y-Ba-Cu-O system. Polished pellets of strongly inhomogeneous
ceramic samples show clearly the appearance of superconducting material in the
intergrain zones of binary primary particles reacted under different
conditions. Susceptibility measurements allows evaluation of superconducting
critical temperature, which turned out to be close to that of optimally doped
YBCO.


title: Factorization theorems for exclusive heavy-quarkonium production

abstract:
  We outline the proofs of the factorization theorems for exclusive two-body
charmonium production in B-meson decay and e^+e^- annihilation to all orders in
perturbation theory in quantum chromodynamics. We find that factorized
expressions hold up to corrections of order m_c/m_b in B-meson decay and
corrections of order m_c^2/s in e^+e^- annihilation, where m_c is the
charm-quark mass, m_b is the bottom-quark mass, and root-s is the e^+e^-
center-of-momentum energy.


title:
Closed conformal Killing-Yano tensor and uniqueness of generalized
  Kerr-NUT-de Sitter spacetime

abstract:
  The higher-dimensional Kerr-NUT-de Sitter spacetime describes the general
rotating asymptotically de Sitter black hole with NUT parameters. It is known
that such a spacetime possesses a rank-2 closed conformal Killing-Yano (CKY)
tensor as a ``hidden'' symmetry which provides the separation of variables for
the geodesic equations and Klein-Gordon equations. We present a classification
of higher-dimensional spacetimes admitting a rank-2 closed CKY tensor. This
provides a generalization of the Kerr-NUT-de Sitter spacetime. In particular,
we show that the Kerr-NUT-de Sitter spacetime is the only spacetime with a
non-degenerate CKY tensor.


title: Evidence for Single Top Production at the Tevatron

abstract:
  We present first evidence for the production of single top quarks at the
Fermilab Tevatron {\ppbar} collider. Both D0 and CDF experiments have measured
the single top production cross section with a 3-standard-deviation
significance using 0.9 fb$^{-1}$ and 2.2 fb$^{-1}$ of lepton+jets data,
respectively. A direct measurement of the CKM matrix element that describes the
$Wtb$ coupling is also performed for the first time.


title:
Non-hermitian radial momentum operator and path integrals in polar
  coordinates

abstract:
  A salient feature of the Schr\"{o}dinger equation is that the classical
radial momentum term $p_{r}^{2}$ in polar coordinates is replaced by the
operator $\hat{P}^{\dagger}_{r} \hat{P}_{r}$, where the operator $\hat{P}_{r}$
is not hermitian in general. This fact has important implications for the path
integral and semi-classical approximations. When one defines a formal hermitian
radial momentum operator $\hat{p}_{r}=(1/2)((\frac{\hat{\vec{x}}}{r})
\hat{\vec{p}}+\hat{\vec{p}}(\frac{\hat{\vec{x}}}{r}))$, the relation
$\hat{P}^{\dagger}_{r}
\hat{P}_{r}=\hat{p}_{r}^{2}+\hbar^{2}(d-1)(d-3)/(4r^{2})$ holds in
$d$-dimensional space and this extra potential appears in the path integral
formulated in polar coordinates. The extra potential, which influences the
classical solutions in the semi-classical treatment such as in the analysis of
solitons and collective modes, vanishes for $d=3$ and attractive for $d=2$ and
repulsive for all other cases $d\geq 4$. This extra term induced by the
non-hermitian operator is a purely quantum effect, and it is somewhat analogous
to the quantum anomaly in chiral gauge theory.


title: The Formation of Black Holes in General Relativity

abstract:
  The subject of this work is the formation of black holes in pure general
relativity, by the focusing of incoming gravitational waves. The theorems
established in this monograph constitute the first foray into the long time
dynamics of general relativity in the large, that is, when the initial data are
no longer confined to a suitably small neighborhood of Minkowskian data. The
theorems are general, no symmetry conditions on the initial data being imposed.


title:
Excursions away from a regular point for one-dimensional symmetric Levy
  processes without Gaussian part

abstract:
  The characteristic measure of excursions away from a regular point is studied
for a class of symmetric L\'evy processes without Gaussian part. It is proved
that the harmonic transform of the killed process enjoys Feller property. The
result is applied to prove extremeness of the excursion measure and to prove
several sample path behaviors of the excursion and the $ h $-path processes.


title: A study of X-ray flares - I. Active late-type dwarfs

abstract:
  We present temporal and spectral characteristics of X-ray flares observed
from six late-type G-K active dwarfs (V368 Cep, XI Boo, IM Vir, V471 Tau, CC
Eri and EP Eri) using data from observations with the XMM-Newton observatory.
All the stars were found to be flaring frequently and altogether a total of
seventeen flares were detected above the ``quiescent'' state X-ray emission
which varied from 0.5 to 8.3 x 10^{29} erg/s. The largest flare was observed in
a low activity dwarf XI Boo with a decay time of 10 ks and ratio of peak flare
luminosity to ``quiescent'' state luminosity of 2. We have studied the spectral
changes during the flares by using colour-colour diagram and by detailed
spectral analysis during the temporal evolution of the flares. The exponential
decay of the X-ray light curves, and time evolution of the plasma temperature
and emission measure are similar to those observed in compact solar flares. We
have derived the semiloop lengths of flares based on the hydrodynamic flare
model. The size of the flaring loops is found to be less than the stellar
radius. The hydrodynamic flare decay analysis indicates the presence of
sustained heating during the decay of most flares.


title: Data-driven Estimation of SM Backgrounds for SUSY Searches at the LHC

abstract:
  Searches for supersymmetry (SUSY) are very important tasks at the Large
Hadron colleder(LHC). If SUSY exists at the TeV scale, clear excess above the
Standard Model (SM) background will be observed. SM background should be
estimated from real data self. In this paper, we descrive the strategy for the
early SUSY searches at the LHC and focus on the data-driven estimation of the
SM background in the early stage of collision.


title:
Resonant Raman of OH/OD vibrations and photoluminescence studies in
  LiTaO3 thin film

abstract:
  Resonant Raman spectra (RRS) of O-H and O-D vibration and libration modes,
their combinations and higher harmonics have been observed in LiTaO3
polycrystalline thin films. RRS peaks are superimposed on photoluminescence
(PL) spectrum. Monochromatic light from a xenon lamp is used as excitation
source. PL spectrum shows two broad peaks, first near the band gap in UV
(4.4-4.8eV) and another in the sub band gap region (< 4.0 eV). Band gap PL
along with RRS peaks are reported for the first time. Photoluminescence
excitation spectrum (PLE) shows a peak at 4.8 eV. Peak positions and full width
at half maximum (FWHM) of RRS peaks depend upon the excitation energy.
Dispersions of the fundamental and the third harmonic of the stretching mode of
O-H with excitation energy are about 800 cm-1/eV and 2000 cm-1/eV respectively.
This dispersion is much higher than reported in any other material.


title:
Partial-state fidelity and quantum phase transitions induced by
  continuous level crossing

abstract:
  The global-state fidelity cannot characterize those quantum phase transitions
(QPTs) induced by continuous level crossing due to its collapse around each
crossing point. In this paper, we take the isotropic Lipkin-Meshkov-Glick (LMG)
model and the antiferromagnetic one-dimensional Heisenberg model as examples to
show that the partial-state fidelity can signal such level-crossing QPTs.
Extending to the thermodynamic limit we introduce the partial-state fidelity
susceptibility and study its scaling behavior. The maximum of the partial-state
fidelity susceptibility goes like $N$ for the LMG model and $N^3$ for the
Heisenberg model.


title: Sociophysics - an astriding science

abstract:
  The status of the sociophysics is discussed as placed between the physics and
the sociology. In particular we ask if the second law of thermodynamics can be
useful in social sciences.


title: Correlations among new CP violating effects in Delta F = 2 observables

abstract:
  We point out that the observed CP violation in Bd - bar{Bd} mixing, taking
into account the measured ratio Delta Md / Delta Ms, the recently improved
lattice value of the non-perturbative parameter BK and an additional effective
suppression factor kappa_epsilon ~= 0.92 in epsilon_K neglected sofar in most
analyses, may be insufficient to describe the measured value of epsilon_K
within the Standard Model (SM), thus hinting at new CP violating contributions
to the K - bar{K} and/or Bd - bar{Bd} systems. Furthermore, assuming that Delta
Md / Delta Ms is SM-like, the signs and the magnitudes of new physics effects
in epsilon_K and in the CP asymmetries S_{psi Ks} and S_{psi phi} may turn out
to be correlated. For example, in a scenario with new CP-phases in Bd and Bs
mixings being approximately equal and negative, a common new phase ~= - 5
degrees could remove the tension between epsilon_K and S_{psi Ks} present in
the SM and simultaneously accommodate, at least partly, the recent claim of
S_{psi phi} being much larger than the SM expectation. We emphasize the
importance of precise determinations of Vcb, BK, FK and xi_s, to which the
parameter epsilon_K and its correlation with the CP violation in the Bd -
bar{Bd} system are very sensitive.


title:
Asymptotic stability of ground states in 2D nonlinear Schr\"odinger
  equation including subcritical cases

abstract:
  We consider a class of nonlinear Schr\"odinger equation in two space
dimensions with an attractive potential. The nonlinearity is local but rather
general encompassing for the first time both subcritical and supercritical (in
$L^2$) nonlinearities. We study the asymptotic stability of the nonlinear bound
states, i.e. periodic in time localized in space solutions. Our result shows
that all solutions with small initial data, converge to a nonlinear bound
state. Therefore, the nonlinear bound states are asymptotically stable. The
proof hinges on dispersive estimates that we obtain for the time dependent,
Hamiltonian, linearized dynamics around a careful chosen one parameter family
of bound states that "shadows" the nonlinear evolution of the system. Due to
the generality of the methods we develop we expect them to extend to the case
of perturbations of large bound states and to other nonlinear dispersive wave
type equations.


title:
Effect of disorder on the interacting Fermi gases in a one-dimensional
  optical lattice

abstract:
  Interacting two-component Fermi gases loaded in a one-dimensional (1D)
lattice and subjected to an harmonic trapping potential exhibit interesting
compound phases in which fluid regions coexist with local Mott-insulator and/or
band-insulator regions. Motivated by experiments on cold atoms inside
disordered optical lattices, we present a theoretical study of the effects of a
correlated random potential on these ground-state phases. We employ a lattice
version of density-functional theory within the local-density approximation to
determine the density distribution of fermions in these phases. The
exchange-correlation potential is obtained from the Lieb-Wu exact solution of
Fermi-Hubbard model. On-site disorder (with and without Gaussian correlations)
and harmonic trap are treated as external potentials. We find that disorder has
two main effects: (i) it destroys the local insulating regions if it is
sufficiently strong compared with the on-site atom-atom repulsion, and (ii) it
induces an anomaly in the inverse compressibility at low density from quenching
of percolation. For sufficiently large disorder correlation length the
enhancement in the inverse compressibility diminishes.


title: Quasiparticle properties of graphene in the presence of disorder

abstract:
  We calculate the quasiparticle properties of chiral two-dimensional Dirac
electrons in graphene within the Landau Fermi Liquid scheme based on $GW$
approximation in the presence of disorder. Disorder effects due to charged
impurity scattering plays a crucial role in density dependence of quasiparticle
quantities. Mode-coupling approach to scattering rate and self-energy in $GW$
approximation for quasiparticle renormalized Fermi velocity and
spin-antisymmetric Landau Fermi parameter incorporating the many-body
interactions and the disorder effects show reduction of these quantities by
5-15 percent at available experimental charge carrier density region.


title: The nature of gamma ray blazar candidate PMN J1326-5256

abstract:
  A comparison of AGN detected at gamma ray energies by EGRET with
flat-spectrum radio sources observed in surveys for intraday variability
reveals that a remarkably high fraction of EGRET blazars show significant
interstellar scintillation at centimetre wavelengths. Scintillating AGN will
therefore be targets of interest for GLAST, scheduled for launch in early 2008.
We suggest that the variable, scintillating flat-spectrum radio source PMN
J1326-5256 is associated with the unidentified EGRET source 3EG J1316-5244. We
describe the properties of PMN J1326-5256 and present recent results of
monitoring with the ATCA and Ceduna radio telescopes.


title: Frustration-induced valence bond crystal and its melting in Mo3Sb7

abstract:
  121/123Sb nuclear quadrupole resonance and muon spin relaxation experiments
of Mo3Sb7 revealed symmetry breakdown to a nonmagnetic state below the
transition recently found at TS=50 K. The transition is characterized by a
distinct lattice dynamics suggested from narrowing of nuclear fields. We point
out that the Mo sublatice is a unique three-dimensional frustrated lattice
where nearest-neighbor and next-nearest-neighbor antiferromagnetic interactions
compete, and propose that tetragonal distortion to release the frustration
stabilizes long-range order of spin-singlet dimers, i.e., valence bond crystal,
which is thermally excited to the dynamic state with cubic symmetry.


title: BD+43 3654 -- a blue straggler?

abstract:
  The astrometric data on the runaway star BD+43 3654 are consistent with the
origin of this O4If star in the center of the Cyg OB2 association, while BD+43
3654 is younger than the association. To reconcile this discrepancy, we suggest
that BD+43 3654 is a blue straggler formed via a close encounter between two
tight massive binaries in the core of Cyg OB2. A possible implication of this
suggestion is that the very massive (and therefore apparently very young) stars
in Cyg OB2 could be blue stragglers as well. We also suggest that the
binary-binary encounter producing BD+43 3654 might be responsible for ejection
of two high-velocity stars (the stripped helium cores of massive stars) -- the
progenitors of the pulsars B2020+28 and B2021+51.


title: High T$_c$ superconductivity in superhard diamond-like BC$_{5}$

abstract:
  Using density functional theory calculations we show that the
recently-synthesized, superhard diamond-like BC$_5$ is superconducting with a
critical temperature of the same order than that of MgB$_2$. The average
electron-phonon coupling is $\lambda=0.89$, the phonon-frequency
logarithmic-average is $<\omega >_{\log}=67.4 $ meV and the isotope
coefficients are $\alpha(C)=0.3$ and $\alpha(B)=0.2$. In BC$_5$,
superconductivity is mostly sustained by vibrations of the B atom and its C
neighbors.


title: Time Dependent Pairing Equations for Seniority One Nuclear Systems

abstract:
  When the time dependent Hartree-Fock-Bogoliubov intrinsic equations of motion
are solved in the case of seniority one nuclear systems, the unpaired nucleon
remains on the same orbital. The blocking effect hinders the possibility to
skip from one orbital to another. This unpleasant feature is by-passed with a
new set of pairing time dependent equations that allows the possibility that
the unpaired nucleon changes its single-particle level. These equations
generalize the time dependent Hartree-Fock-Bogoliubov equations of motion by
including the Landau-Zener effect. The derivation of these new equations is
presented in details. These equations are applied in the case of a
superasymmetric fission process, that is, in order to explain the fine
structure the 14C emission from 233Ra. A new version of the Woods-Saxon model
extended for two-center potentials is used in this context.


title: When is the Hawking mass monotone under Geometric Flows

abstract:
  In this paper, we study the relation of the monotonicity of Hawking Mass and
geometric flow problems. We show that along the Hamilton-DeTurck flow with
bounded curvature coupled with the modified mean curvature flow, the Hawking
mass of the hypersphere with a sufficiently large radius in Schwarzschild
spaces is monotone non-decreasing.


title:
SPARK00: A Benchmark Package for the Compiler Evaluation of
  Irregular/Sparse Codes

abstract:
  We propose a set of benchmarks that specifically targets a major cause of
performance degradation in high performance computing platforms: irregular
access patterns. These benchmarks are meant to be used to asses the performance
of optimizing compilers on codes with a varying degree of irregular access. The
irregularity caused by the use of pointers and indirection arrays are a major
challenge for optimizing compilers. Codes containing such patterns are
notoriously hard to optimize but they have a huge impact on the performance of
modern architectures, which are under-utilized when encountering irregular
memory accesses. In this paper, a set of benchmarks is described that
explicitly measures the performance of kernels containing a variety of
different access patterns found in real world applications. By offering a
varying degree of complexity, we provide a platform for measuring the
effectiveness of transformations. The difference in complexity stems from a
difference in traversal patterns, the use of multiple indirections and control
flow statements. The kernels used cover a variety of different access patterns,
namely pointer traversals, indirection arrays, dynamic loop bounds and run-time
dependent if-conditions. The kernels are small enough to be fully understood
which makes this benchmark set very suitable for the evaluation of
restructuring transformations.


title: Pseudogap and time reversal breaking in a holographic superconductor

abstract:
  Classical SU(2) Yang-Mills theory in 3+1 dimensional anti-de Sitter space is
known to provide a holographic dual to a 2+1 system that undergoes a
superconducting phase transition. We study the electrical conductivity and
spectral density of an isotropic superconducting phase. We show that the theory
exhibits a pseudogap at low temperatures and a nonzero Hall conductivity. The
Hall conductivity is possible because of spontaneous breaking of time reversal
symmetry.


title:
The Poincar\'e series of a local Gorenstein ring of multiplicity up to
  10 is rational

abstract:
  Let $R$ be a local, Gorenstein ring with algebraically closed residue field
$k$ of characteristic 0 and let
$P_R(z):=\sum_{p=0}^{\infty}\dim_k(\tor_p^R(k,k))z^p$ be its Poincar\'e series.
We compute $P_R$ when $R$ belongs to a particular class defined in the
introduction, proving its rationality. As a by--product we prove the
rationality of $P_R$ for all local, Gorenstein rings of multiplicity at most
10.


title: Local spectral radius formulas on compact Lie groups

abstract:
  We determine the local spectrum of a central element of the complexified
universal enveloping algebra of a compact connected Lie group at a smooth
function as an element of L^p(G). Based on this result we establish a
corresponding local spectral radius formula.


title: Properly Coloured Cycles and Paths: Results and Open Problems

abstract:
  In this paper, we consider a number of results and seven conjectures on
properly edge-coloured (PC) paths and cycles in edge-coloured multigraphs. We
overview some known results and prove new ones. In particular, we consider a
family of transformations of an edge-coloured multigraph $G$ into an ordinary
graph that allow us to check the existence PC cycles and PC $(s,t)$-paths in
$G$ and, if they exist, to find shortest ones among them. We raise a problem of
finding the optimal transformation and consider a possible solution to the
problem.


title: Truncated Wiener-Hopf operators with Fisher Hartwig singularities

abstract:
  We derive the asymptotic behavior of determinants of truncated Wiener-Hopf
operators generated by symbols having Fisher-Hartwig singularities. This task
is achieved thanks to an asymptotic resolution of the Riemann-Hilbert problem
associated to some generalized sine kernel. As a byproduct, we give yet another
derivation of the asymptotic behavior of Toeplitz determinants having
Fisher-Hartwig singularities. The Riemann-Hilbert problem approach to these
asymptotics yields a systematic although quickly cumbersome way to compute
their sub-leading asymptotics.


title: Mapping of quantum well eigenstates with semimagnetic probes

abstract:
  We present results of transmission measurements on CdTe quantum wells with
thin semimagnetic CdMnTe probe layers embedded in various positions along the
growth axis. The presence of the probes allow us to map the probability density
functions by two independent methods: analyzing the exciton energy position and
the exciton Zeeman splitting. We apply both approaches to map the first three
quantum well eigenstates and we find that both of them yield equally accurate
results.


title: Quantum Phase Transition in the One-Dimensional XZ Model

abstract:
  We introduce a one-dimensional (1D) XZ model with alternating
$\sigma_i^z\sigma_{i+1}^z$ and $\sigma_i^x\sigma_{i+1}^x$ interactions on
even/odd bonds, interpolating between the Ising model and the quantum compass
model. We present two ways of its exact solution by: ($i$) mapping to the
quantum Ising models, and ($ii$) using fermions with spin 1/2. In certain cases
the nearest neighbor pseudospin correlations change discontinuously at the
quantum phase transition, where one finds highly degenerate ground state of the
1D compass model.


title: Fast trigger logic with digitized time information

abstract:
  We present a method for the evaluation, at the first level of trigger, of
logical conditions with high time resolution, using the digitized times of fast
signals delivered in the detectors of high rate experiments. We describe a
dead-time-less implementation of this method on a commercial Field Programmable
Gate Array (FPGA). By virtue of its features, the method offers an excellent
solution to the problem of including veto conditions in the first level of
trigger for experiments on rare decays.


title: Inference for Multivariate Normal Mixtures

abstract:
  Multivariate normal mixtures provide a flexible model for high-dimensional
data. They are widely used in statistical genetics, statistical finance, and
other disciplines. Due to the unboundedness of the likelihood function,
classical likelihood-based methods, which may have nice practical properties,
are inconsistent. In this paper, we recommend a penalized likelihood method for
estimating the mixing distribution. We show that the maximum penalized
likelihood estimator is strongly consistent when the number of components has a
known upper bound. We also explore a convenient EM-algorithm for computing the
maximum penalized likelihood estimator. Extensive simulations are conducted to
explore the effectiveness and the practical limitations of both the new method
and the ratified maximum likelihood estimators. Guidelines are provided based
on the simulation results.


title:
Split ring resonator-coupled enhanced transmission through a single
  subwavelength aperture

abstract:
  We report the enhanced transmission of electromagnetic waves through a single
subwavelength aperture by making use of the resonance behavior of a split ring
resonator (SRR) at microwave frequencies. By placing a single SRR at the
near-field of the aperture, strongly localized electromagnetic fields are
effectively coupled to the aperture with a radius that is twenty times smaller
than the resonance wavelength. We obtained 740-fold transmission enhancement by
exciting the electric resonance of SRR. A different coupling mechanism, through
the magnetic resonance of SRR, is also verified to yield enhanced transmission.
Good agreement is obtained between the microwave measurements and numerical
simulations.


title: Models of electron transport in single layer graphene

abstract:
  The main features of the conductivity of doped single layer graphene are
analyzed, and models for different scattering mechanisms are presented.


title:
The diplomat's dilemma: Maximal power for minimal effort in social
  networks

abstract:
  Closeness is a global measure of centrality in networks, and a proxy for how
influential actors are in social networks. In most network models, and many
empirical networks, closeness is strongly correlated with degree. However, in
social networks there is a cost of maintaining social ties. This leads to a
situation (that can occur in the professional social networks of executives,
lobbyists, diplomats and so on) where agents have the conflicting objectives of
aiming for centrality while simultaneously keeping the degree low. We
investigate this situation in an adaptive network-evolution model where agents
optimize their positions in the network following individual strategies, and
using only local information. The strategies are also optimized, based on the
success of the agent and its neighbors. We measure and describe the time
evolution of the network and the agents' strategies.


title: Bhabha Scattering at NNLO

abstract:
  We review the status of the calculation of next-to-next-to-leading order
corrections to large angle Bhabha scattering in pure QED. After discussing the
electron-loop and photonic corrections, we focus on the recently calculated
two-loop virtual corrections involving a heavy-flavor fermion loop. We conclude
by assessing the numerical impact of these corrections on the Bhabha scattering
cross section at colliders operating at a center of mass energy of about 1-GeV.


title:
Fermionic corrections to the interference of the electro- and
  chromomagnetic dipole operators in anti-B --> X(s) gamma at O(alpha(s)**2)

abstract:
  We calculate the virtual and bremsstrahlung fermionic corrections due to the
interference of the electro- and chromomagnetic dipole operators in the
inclusive \bar{B}\to X_s\gamma decay at O(\alpha_s^2) and present analytical
results for both the total decay rate and the photon energy spectrum.


title: A set-valued framework for birth-and-growth process

abstract:
  We propose a set-valued framework for the well-posedness of birth-and-growth
process. Our birth-and-growth model is rigorously defined as a suitable
combination, involving Minkowski sum and Aumann integral, of two very general
set-valued processes representing nucleation and growth respectively. The
simplicity of the used geometrical approach leads us to avoid problems arising
by an analytical definition of the front growth such as boundary regularities.
In this framework, growth is generally anisotropic and, according to a
mesoscale point of view, it is not local, i.e. for a fixed time instant, growth
is the same at each space point.


title: Extrinsic symplectic symmetric spaces

abstract:
  We define the notion of extrinsic symplectic symmetric spaces and exhibit
some of their properties. We construct large families of examples and show how
they fit in the perspective of a complete classification of these manifolds. We
also build a natural star-quantization on a class of examples.


title:
Optimal local H\"{o}lder index for density states of superprocesses with
  $(1+\beta)$-branching mechanism

abstract:
  For $0<\alpha\leq2$, a super-$\alpha$-stable motion $X$ in $\mathsf{R}^d$
with branching of index $1+\beta\in(1,2)$ is considered. Fix arbitrary $t>0$.
If $d<\alpha/\beta$, a dichotomy for the density function of the measure $X_t$
holds: the density function is locally H\"{o}lder continuous if $d=1$ and
$\alpha>1+\beta$ but locally unbounded otherwise. Moreover, in the case of
continuity, we determine the optimal local H\"{o}lder index.


title:
Photometric Follow-up Observations of the Transiting Neptune-Mass Planet
  GJ 436b

abstract:
  This paper presents multi-band photometric follow-up observations of the
Neptune-mass transiting planet GJ 436b, consisting of 5 new ground-based
transit light curves obtained in May 2007. Together with one already published
light curve we have at hand a total of 6 light curves, spanning 29 days. The
analysis of the data yields an orbital period P = 2.64386+-0.00003 days,
mid-transit time T_c [HJD] =2454235.8355+-0.0001, planet mass M_p = 23.1+-0.9
M_{\earth} = 0.073+-0.003 M_{Jup}, planet radius R_p = 4.2+-0.2 R_{\earth} =
0.37+-0.01 R_{Jup} and stellar radius R_s = 0.45+-0.02 R_{\sun}. Our typical
precision for the mid transit timing for each transit is about 30 seconds. We
searched the data for a possible signature of a second planet in the system
through transit timing variations (TTV) and variation of the impact parameter.
The analysis could not rule out a small, of the order of a minute, TTV and a
long-term modulation of the impact parameter, of the order of +0.2 year^{-1}.


title: The homotopy analysis method and the Lienard equation

abstract:
  In this work, Lienard equations are considered. The limit cycles of these
systems are studied by applying the homotopy analysis method. The amplitude and
frequency obtained with this methodology are in good agreement with those
calculated by computational methods. This puts in evidence that the homotopy
analysis method is an useful tool to solve nonlinear differential equations.


title: Covariant quantum instruments

abstract:
  The structure of covariant instruments is studied and a general structure
theorem is derived. A detailed characterization is given to covariant
instruments in the case of an irreducible representation of a locally compact
group.


title: Valence bond solid states with symplectic symmetry

abstract:
  We introduce a one-dimensional valence bond solid (VBS) state with symplectic
symmetry SP(n) and construct the corresponding parent Hamiltonian. We argue
that there is a gap in the spectrum. We calculate exactly the static
correlation functions, which fall off exponentially. Hence the model introduced
here shares all properties of the Haldane scenario for integer-spin quantum
antiferromagnets. We further show that the VBS state possesses string order and
discuss its generalization to higher dimensions.


title: A Swift gaze into the 2006 March 29th burst forest of SGR 1900+14

abstract:
  We report on the intense burst ``forest'' recorded on 2006 March 29 which
lasted for ~30s. More than 40 bursts were detected both by BAT and by XRT,
seven of which are rare intermediate flares (IFs): several times 10^{42} ergs
were released. The BAT data were used to carry out time-resolved spectroscopy
in the 14-100keV range down to 8ms timescales.
  This unique dataset allowed us to test the magnetar model predictions such as
the magnetically trapped fireball and the twisted magnetosphere over an
unprecedented range of fluxes and with large statistics (in terms of both
photons and IFs). We confirmed that a two blackbody component fits adequately
the time-resolved and integrated spectra of IFs. However, Comptonization models
give comparable good reduced chi^2. Moreover, we found: i) a change of
behavior, around ~10^{41} erg/s, above which the softer blackbody shows a sort
of saturation while the harder one still grows to a few times 10^{41} erg/s;
ii) a rather sharp correlation between temperature and radii of the blackbodies
(R^2 prop kT^{-3}), which holds for the most luminous parts of the flares
(approximately for L_{tot} > 10^{41} erg/s). Within the magnetar model, the
majority of these findings can be accounted for in terms of thermalised
emission from the E-mode and O-mode photospheres. Interestingly, the maximum
observed luminosity coming from a region of ~15km matches the magnetic
Eddington luminosity at the same radius, for a surface dipole field of ~8 x
10^{14} G (virtually equal to the one deduced from the spindown of SGR
1900+14).


title: The accretion mechanism in low-power radio galaxies

abstract:
  We study a sample of 44 low-luminosity radio-loud AGN, which represent a
range of nuclear radio-power spanning 5 orders of magnitude, to unveil the
accretion mechanism in these galaxies. We estimate the accretion rate of gas
associated with their hot coronae by analyzing archival Chandra data, to derive
the deprojected density and temperature profiles in a spherical approximation.
Measuring the jet power from the nuclear radio-luminosity, we find that the
accretion power correlates linearly with the jet power, with an efficiency of
conversion from rest mass into jet power of ~0.012. These results strengthen
and extend the validity of the results obtained by Allen and collaborators for
9 radio galaxies, indicating that hot gas accretion is the dominant process in
FR I radio galaxies across their full range of radio-luminosity.
  We find that the different levels of nuclear activity are driven by global
differences in the structure of the galactic hot coronae. A linear relation
links the jet power with the host X-ray surface brightness. This implies that a
substantial change in the jet power must be accompanied by a global change in
its ISM properties, driven for example by a major merger. This correlation
provides a simple widely applicable method to estimate the jet-power of a given
object by observing the intensity of its host X-ray emission.
  To maintain the mass flow in the jet, the fraction of gas that crosses the
Bondi radius reaching the accretion disk must be > 0.002. This implies that the
radiative efficiency of the disk must be < 0.005, an indication that accretion
in these objects occurs not only at a lower rate, but also at lower efficiency
than in standard accretion disks.


title:
Binary Additive Problems Involving Naturals with Binary Decompositions
  of a Special Kind

abstract:
  Let $h$ and $l$ be integers such that $0\le h\le 2$, $0\le l\le 4$. We obtain
asymptotic formulas for the numbers of solutions of the equations $n-3m=h$,
$n-5m=l$ in positive integers $m$ and $n$ of a special kind, $m\le X$.


title:
Magnetic field induced incommensurate resonance in cuprate
  superconductors

abstract:
  The influence of a uniform external magnetic field on the dynamical spin
response of cuprate superconductors in the superconducting state is studied
based on the kinetic energy driven superconducting mechanism. It is shown that
the magnetic scattering around low and intermediate energies is dramatically
changed with a modest external magnetic field. With increasing the external
magnetic field, although the incommensurate magnetic scattering from both low
and high energies is rather robust, the commensurate magnetic resonance
scattering peak is broadened. The part of the spin excitation dispersion seems
to be an hourglass-like dispersion, which breaks down at the heavily low energy
regime. The theory also predicts that the commensurate resonance scattering at
zero external magnetic field is induced into the incommensurate resonance
scattering by applying an external magnetic field large enough.


title:
Estimate of a Trigonometrical Sum Involving Naturals with Binary
  Decompositions of a Special Kind

abstract:
  Let $\mathbb{N}_0$ be a class of natural numbers whose binary decompositions
has even number of 1. We estimate of the sum $\sum\limits_{n\in
\mathbf{N}_0,n\le X}\exp(2\pi i \alpha n^2)$.


title: Generating technique for $U(1)^3 5D$ supergravity

abstract:
  We develop generating technique for solutions of $U(1)^3 5D$ supergravity via
dimensional reduction to three dimensions. This theory, which recently
attracted attention in connection with black rings, can be viewed as consistent
truncation of the $T^6$ compactification of the eleven-dimensional
supergravity. Its further reduction to three dimensions accompanied by
dualisation of the vector fields leads to 3D gravity coupled sigma model on the
homogeneous space $SO(4,4)/SO(4)\times SO(4)$ or $SO(4,4)/SO(2,2)\times
SO(2,2)$ depending on the signature of the three-space. We construct a $8\times
8$ matrix representation of these cosets in terms of lower-dimensional blocks.
Using it we express solution generating transformations in terms of the
potentials and identify those preserving asymptotic conditions relevant to
black holes and black rings. As an application, we derive the doubly rotating
black hole solution with three independent charges. A suitable contraction of
the above cosets is used to construct a new representation of the coset
$G_{2(2)}/(SL(2,R)\times SL(2,R))$ relevant for minimal five-dimensional
supergravity.


title: Magnetic anisotropy in ferromagnetic Josephson junctions

abstract:
  Magnetotransport measurements were done on $\Nb/\Al_2\O_3/\Cu/\Ni/\Nb$
superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions.
Depending on ferromagnetic $\Ni$ interlayer thickness and geometry the standard
(1d) magnetic field dependence of critical current deviates from the text-book
model for Josephson junctions. The results are qualitatively explained by a
short Josephson junction model based on anisotropy and 2d remanent
magnetization.


title: Quantum singularities in the BTZ spacetime

abstract:
  The spinless Ba\~nados-Teiltelboim-Zanelli (BTZ) spacetime is considered in
the quantum theory context. Specially, we study the case of negative mass
parameter using quantum test particles obeying the Klein-Gordon and Dirac
equations. We study if this classical singular spacetime, with a naked
singularity at the origin, remains singular when tested with quantum particles.
The need of additional information near the origin is confirmed for massive
scalar particles and all the possible boundary conditions necessary to turn the
spatial portion of the wave operator self-adjoint are found. When tested by
massless scalar particles or fermions, the singularity is ``healed'' and no
extra boundary condition are needed. Near infinity, no boundary conditions are
necessary.


title: On Fano threefolds with canonical Gorenstein singularities

abstract:
  We classify three-dimensional Fano varieties with canonical Gorenstein
singularities of degree bigger than 64.


title: CRUSH: fast and scalable data reduction for imaging arrays

abstract:
  CRUSH is an approach to data analysis under noise interference, developed
specifically for submillimeter imaging arrays. The method uses an iterated
sequence of statistical estimators to separate source and noise signals. Its
filtering properties are well-characterized and easily adjusted to preference.
Implementations are well-suited for parallel processing and its computing
requirements scale linearly with data size -- rendering it an attractive
approach for reducing the data volumes from future large arrays.


title: Study of Vector Boson Fusion Higgs in Atlas-LHC

abstract:
  Within the framework of Standard Model, the production mode of Higgs boson
through the fusion of the vector bosons $W$ or $Z$ (Vector Boson Fusion) is one
of the most important production mechanisms, providing a specific detection
signature. A detailed study regarding this issue is being undergone for ATLAS
detector in LHC and some general features of this analysis are being presented
in this note emphasizing in the study of Central Jet Veto.


title: Interpreting the M2-brane Action

abstract:
  The world-volume theory of multiple M2-branes proposed recently has a free
scalar field. For large vev of this scalar field the world-volume action
reduces to that of multiple D2-branes with Yang-Mills coupling proportional to
the vev. We suggest that the correct interpretation of this scalar field is as
the radial position of the M2-brane center of mass in a cylindrical polar
coordinate system. Regarding the azimuthal angle as compact we can regard this
as a set of coincident D2-branes in type IIA string theory with varying dilaton
and metric. We find that the effective world-volume theory on the D2-branes has
Yang-Mills coupling proportional to the radial coordinate; furthermore the
radial coordinate satisfies free field equations of motion. This agrees with
the corresponding results derived from the M2-brane world-volume theory.


title: The FZZ-Duality Conjecture - A Proof

abstract:
  We prove that the cigar conformal field theory is dual to the Sine-Liouville
model, as conjectured originally by Fateev, Zamolodchikov and Zamolodchikov.
Since both models possess the same chiral algebra, our task is to show that
correlations of all tachyon vertex operators agree. We accomplish this goal
through an off-critical version of the geometric Langlands duality for sl(2).
More explicitly, we combine the well-known self-duality of Liouville theory
with an intriguing correspondence between the cigar and Liouville field theory.
The latter is derived through a path integral treatment. After a very detailed
discussion of genus zero amplitudes, we extend the duality to arbitrary closed
surfaces.


title:
AC conductance and non-symmetrized noise at finite frequency in quantum
  wires and carbon nanotubes

abstract:
  We calculate the AC conductance and the finite-frequency non-symmetrized
noise in interacting quantum wires and single-wall carbon nanotubes in the
presence of an impurity. We observe a strong asymmetry in the frequency
spectrum of the non-symmetrized excess noise, even in the presence of the
metallic leads. We find that this asymmetry is proportional to the differential
excess AC conductance of the system, defined as the difference between the AC
differential conductances at finite and zero voltage, and thus disappears for a
linear system. In the quantum regime, for temperatures much smaller than the
frequency and the applied voltage, we find that the emission noise is exactly
equal to the impurity partition noise. For the case of a weak impurity we
expand our results for the AC conductance and the noise perturbatively. In
particular, if the impurity is located in the middle of the wire or at one of
the contacts, our calculations show that the noise exhibits oscillations with
respect to frequency, whose period is directly related to the value of the
interaction parameter $g$.


title: On Morita equivalence for simple Generalized Weyl algebras

abstract:
  We give a necessary condition for Morita equivalence of simple Generalized
Weyl algebras of classical type. We propose a reformulation of Hodges' result,
which describes Morita equivalences in case the polynomial defining the
Generalized Weyl algebra has degree 2, in terms of isomorphisms of quantum
tori, inspired by similar considerations in noncommutative differential
geometry. We study how far this link can be generalized for $n\ge 3$.


title:
Radiation Induced Effects in a Monolithic Active Pixel Sensor : The
  Mimosa8 Chip

abstract:
  We have studied the effects of ionizing irradiation from a 60Co source and
the effects of neutron irradiation on a Monolithic Active Pixel Sensor
Chip(MIMOSA8). A previous report was devoted solely to the neutron-induced
effects. We show that extended defects due to the neutron damage changes the
distribution of the pixels pedestals. This is mainly due to the increase of the
dark generation current due to the presence of deep traps in the depleted zones
of the sensors. Alternatively, the exposure to ionizing irradiation increases
the pedestals in a more homogeneous way, this coming from the generation of
interface states at the Si/SiO2 interface supplemented by the presence of
positively charged traps in the oxides. the sensors' leakage current is then
increased. We discuss the results in view of increasing the radiation-hardness
of the MAPS, bearing in mind that these chips were not designed with any
rad-tol layout technique.


title: Fusion for Evaluation of Image Classification in Uncertain Environments

abstract:
  We present in this article a new evaluation method for classification and
segmentation of textured images in uncertain environments. In uncertain
environments, real classes and boundaries are known with only a partial
certainty given by the experts. Most of the time, in many presented papers,
only classification or only segmentation are considered and evaluated. Here, we
propose to take into account both the classification and segmentation results
according to the certainty given by the experts. We present the results of this
method on a fusion of classifiers of sonar images for a seabed
characterization.


title: Spectroscopic metallicities of Vega-like stars

abstract:
  Aims: To determine the metallicities of 113 Southern Hemisphere Vega-like
candidate stars in relation to the Exoplanet host group and field stars.
  Methods: We applied two spectroscopic methods of abundance determinations:
equivalent width measurements together with the ATLAS9 (Kurucz 1993) model
atmospheres and the WIDTH9 program, and a comparison of observed spectra with
the grid of synthetic spectra of Munari et al. (2005).
  Results: For the Vega-like group, the metallicities are indistinguishable
from those of field stars not known to be associated with planets or disks.
This result is quite different from the metallicities of Exoplanet host stars
which are metal-rich in comparison to field stars.


title:
Global controllability and stabilization for the nonlinear Schrodinger
  equation on an interval

abstract:
  We prove global internal controllability in large time for the nonlinear
Schrodinger equation on a bounded interval with periodic, Dirichlet or Neumann
conditions. Our strategy combines stabilization and local controllability near
0. We use Bourgain spaces to prove this result on L2. We also get a regularity
result about the control if the data are assumed smoother.


title:
Consequences of anisotropy in electrical charge storage: application to
  the characterization by the mirror method of TiO2 rutile

abstract:
  This article is devoted first to anisotropic distributions of stored electric
charges in isotropic materials, second to charge trapping and induced
electrostatic potential in anisotropic dielectrics. On the one hand, we examine
the case of anisotropic trapped charge distributions in linear homogeneous
isotropic (LHI) insulators, obtained after an electron irradiation in a
scanning electron microscope. This injection leads to the formation of a mirror
image.


title:
Decision Support with Belief Functions Theory for Seabed
  Characterization

abstract:
  The seabed characterization from sonar images is a very hard task because of
the produced data and the unknown environment, even for an human expert. In
this work we propose an original approach in order to combine binary
classifiers arising from different kinds of strategies such as one-versus-one
or one-versus-rest, usually used in the SVM-classification. The decision
functions coming from these binary classifiers are interpreted in terms of
belief functions in order to combine these functions with one of the numerous
operators of the belief functions theory. Moreover, this interpretation of the
decision function allows us to propose a process of decisions by taking into
account the rejected observations too far removed from the learning data, and
the imprecise decisions given in unions of classes. This new approach is
illustrated and evaluated with a SVM in order to classify the different kinds
of sediment on image sonar.


title: Reheating-volume measure for random-walk inflation

abstract:
  The recently proposed "reheating-volume" (RV) measure promises to solve the
long-standing problem of extracting probabilistic predictions from cosmological
"multiverse" scenarios involving eternal inflation. I give a detailed
description of the new measure and its applications to generic models of
eternal inflation of random-walk type. For those models I derive a general
formula for RV-regulated probability distributions that is suitable for
numerical computations. I show that the results of the RV cutoff in random-walk
type models are always gauge-invariant and independent of the initial
conditions at the beginning of inflation. In a toy model where equal-time
cutoffs lead to the "youngness paradox," the RV cutoff yields unbiased results
that are distinct from previously proposed measures.


title: Density perturbations in decaying holographic dark energy models

abstract:
  We study cosmological perturbations in the context of an interacting dark
energy model, where the holographic dark energy with IR cutoff decays into the
cold dark matter (CDM). For this purpose, we introduce three IR cutoffs of
Hubble horizon, particle horizon, and future event horizon. Here we present
small perturbations under the case that effective equation of state (EOS:
$\omega^{\rm eff}$) for the holographic energy density is determined to be the
same negative constant as that for the CDM. Such new matter productions tend to
dilute the density perturbations of CDM (matter contrast). For a decelerating
universe of $\omega^{\rm eff}>-1/3$, the matter contrast is growing as the
universe evolves, while for an accelerating universe of $\omega^{\rm
eff}<-1/3$, the matter contrast is decaying, irrespective of the choice of IR
cutoff. This shows clearly that the acceleration suppresses the growing of the
density perturbations at the early universe.


title:
Phase diagram and pion modes of the neutral Nambu-Jona Lasinio model
  with the Polyakov loop

abstract:
  I discuss recent results obtained by our group within the Nambu-Jona Lasinio
model with the Polyakov loop. I focus on the two flavor version of the model,
discussing the phase diagram in the $\mu-T$ plane in the case in which
electrical neutrality is required. One of the results is that pion condensation
is not observed in our model when a physical mass for the light quarks is
considered.


title:
Colossal dielectric constant and Maxwell-Wagner relaxation in
  $Pb(Fe_{1/2}Nb_{1/2})O_{3-x}PbTiO_3$ single crystals

abstract:
  Recently, materials exhibiting colossal dielectric constant ($CDC$) have
attracted significant attention because of their high dielectric constant and
potential applications in electronic devices, such as high dielectric
capacitors, capacitor sensors, random access memories and so on.


title:
Non-monotonic size dependence of the elastic modulus of nanocrystalline
  ZnO embedded in a nanocrystalline silver matrix

abstract:
  We present the first high pressure Raman study on nanocrystalline ZnO films
with different average crystallite sizes. The problem of low Raman signals from
nano sized particles was overcome by forming a nanocomposite of Ag and ZnO
nanoparticles. The presence of the nanodispersed Ag particles leads to a
substantial surface enhancement of the Raman signal from ZnO. We find that the
elastic modulus of nanocrystalline ZnO shows a non-monotonic dependence on the
crystallite size. We suggest that the non-monotonicity arises from an interplay
between the elastic properties of the individual grains and the intergranular
region.


title: The effect of early dark matter halos on reionization

abstract:
  The annihilation of dark matter particles releases energy, ionizing some of
the gas in the Universe. We investigate the effect of dark matter halos on
reionization. We show that the effect depends on the assumed density profile,
the particle mass, and the assumed minimum halo mass. For NFW halos and typical
WIMPs, we find the effect to be quite small. However, light dark matter
candidates in the MeV range can contribute significantly to reionization and
can make an important contribution to the measured optical depth. This effect
may be used to constrain light dark matter models. We also study the effect of
varying the halo density profile on reionization.


title: Axions and polarisation of quasars

abstract:
  We present results showing that, thanks to axion-photon mixing in external
magnetic fields, it is actually possible to produce an effect similar to the
one needed to explain the large-scale coherent orientations of quasar
polarisation vectors in visible light that have been observed in some regions
of the sky.


title: Nonstandard Models and Optimization

abstract:
  This is an overview of a few possibilities that are open by model theory in
applied mathematics. Most attention is paid to the present state and frontiers
of the Cauchy method of majorants, approximation of operator equations with
finite-dimensional analogs, and the Lagrange multiplier principle in
multiobjective decision making.


title:
High Energy Neutrinos from the Cold: Status and Prospects of the Icecube
  Experiment

abstract:
  The primary motivation for building neutrino telescopes is to open the road
for neutrino astronomy, and to offer another observational window for the study
of cosmic ray origins. Other physics topics, such as the search for WIMPs, can
also be developed with neutrino telescope. As of March 2008, the IceCube
detector, with half of its strings deployed, is the world largest neutrino
telescope taking data to date and it will reach its completion in 2011. Data
taken with the growing detector are being analyzed. The results of some of
these works are summarized here. AMANDA has been successfully integrated into
IceCube data acquisition system and continues to accumulate data. Results
obtained using only AMANDA data taken between the years 2000 and 2006 are also
presented. The future of IceCube and the extensions in both low and high energy
regions will finally be discussed in the last section.


title: A Few Results about the Geometry of Model Averages

abstract:
  Given a collection of computational models that all estimate values of the
same natural process, we compare the performance of the average of the
collection to the individual member whose estimates are nearest a given set of
observations. Performance is the ability of a model, or average, to reproduce a
sequence of observations of the process. We identify a condition that
determines if a single model performs better than the average. That result also
yields a necessary condition for when the average performs better than any
individual model. We also give sharp bounds for the performance of the average
on a given interval. Since the observation interval is fixed, performance is
evaluated in a vector space, and we can add intuition to our results by
explaining them geometrically. We conclude with some comments on directions
statistical tests of performance might take.


title: On distribution and almost convergence of bounded sequences

abstract:
  In this paper, we give the concepts of properly distributed and simply
distributed sequences, and prove that they are almost convergent. Basing on
these, we review the work of Feng and Li [Feng, B. Q. and Li, J. L., Some
estimations of Banach limits, J. Math. Anal. Appl. 323(2006) No. 1, 481-496.
MR2262220 46B45 (46A45).], which is shown to be a special case of our
generalized theory.


title: Quantum strategy in moving frames

abstract:
  We investigate quantum strategy in moving frames by considering Prisoner's
Dilemma and propose four thresholds of $\gamma$ for two players to determine
their \textit{Nash Equilibria}. Specially, an interesting phenomenon appears in
relativistic situation that the quantum feature of the game would be enhanced
and diminished for different players whose particle's initial spin direction
are respectively parallel and antiparallel to his/her movement direction, that
is, for the former the quantum feature of the game is enhanced while for the
latter the quantum feature would be diminished. Thus a classical latter could
still maintain his/her strictly dominant strategy (classical strategy) even if
the game itself is highly entangled.


title:
A Simple Quantum-Mechanical Model of Spacetime I: Microscopic Properties
  of Spacetime

abstract:
  This is the first part in a series of two papers, where we consider a
specific microscopic model of spacetime. In our model Planck size quantum black
holes are taken to be the fundamental building blocks of space and time.
Spacetime is assumed to be a graph, where black holes lie on the vertices. In
this first paper we construct our model in details, and show how classical
spacetime emerges at the long distance limit from our model. We also consider
the statistics of spacetime.


title: An Unparticle Example in 2D

abstract:
  We discuss what can be learned about unparticle physics by studying simple
quantum field theories in one space and one time dimension. We argue that the
exactly soluble 2D theory of a massless fermion coupled to a massive vector
boson, the Sommerfield model, is an interesting analog of a Banks-Zaks model,
approaching a free theory at high energies and a scale invariant theory with
nontrivial anomalous dimensions at low energies. We construct a toy standard
model coupling to the fermions in the Sommerfield model and study how the
transition from unparticle behavior at low energies to free particle behavior
at high energies manifests itself in interactions with the toy standard model
particles.


title: Model Independent Search For New Physics At The Tevatron

abstract:
  This thesis is a global, model-independent search for new physics, performed
with CDF Run II data. The Standard Model prediction is implemented in all final
states simultaneously, and an array of statistical probes is employed to search
for significant discrepancies between data and prediction. The probes (also
known as "Vista", "Sleuth" and "Bump Hunter") are sensitive to population
discrepancies, shape disagreements in distributions of kinematic variables,
excesses of events of high total transverse momentum, and local excesses of
data suggesting resonant production of new massive particles. The result of
this search, first in 1 fb-1 and then in 2 fb-1, is null, namely no
considerable evidence of new physics was found.


title:
A Simple Quantum-Mechanical Model of Spacetime II: Thermodynamics of
  Spacetime

abstract:
  In this second part of our series of two papers, where spacetime is modelled
by a graph, where Planck size quantum black holes lie on the vertices, we
consider the thermodynamics of spacetime. We formulate an equation which tells
in which way an accelerating, spacelike two-surface of spacetime interacts with
the thermal radiation flowing through that surface. In the low temperature
limit, where most quantum black holes constituting spacetime are assumed to lie
in the ground state, our equation implies, among other things, the Hawking and
the Unruh effects, as well as Einstein's field equation with a vanishing
cosmological constant for general matter fields. We also consider the high
temperature limit, where the microscopic black holes are assumed to lie in
highly excited states. In this limit our model implies, among other things,
that black hole entropy depends logarithmically on its area, instead of being
proportional to the area.


title:
Ground-state phase diagrams of the generalized Falicov-Kimball model
  with Hund coupling

abstract:
  Charge and spin orderings are studied on the simplest 1D and the 2D square
lattice within the generalized Falicov-Kimball model with Hund coupling between
localized and itinerant electrons. Using the restricted phase diagrams method
(RPDM) a number of simple rules of formation of various sorts of ground state
phases have been detected. In particular, relationships between density of
current carriers (electrons or holes) and type of charge and magnetic
arrangement has been determined. In 2D in the mixed valence regime only axial
stripes (vertical or horizontal) have been found for intermediate values of the
coupling constants. They are composed of ferromagnetic or antiferromagnetic
chains interchanged with non-magnetic ones. For band fillings close to the half
filling stripe phases oriented along one of the main diagonal direction are
formed. The results suggest a possibility of tuning modulations of charge and
magnetic superstructures with a change of doping.


title: Dilatation operator and Cayley graphs

abstract:
  We use the algebraic definition of the Dilatation operator provided by
Minahan, Zarembo, Beisert, Kristijansen, Staudacher, proper for single trace
products of scalar fields, at leading order in the large-N 't Hooft limit to
develop a new approach to the evaluation of the spectrum of the Dilatation
operator. We discover a vast number of exact sequences of eigenstates.


title:
Parton rearrangement and fast thermalization in heavy-ion collisions at
  RHIC and LHC energies

abstract:
  The implications of parton rearrangement processes on the dynamics of
ultra-relativistic heavy-ion collisions have been investigated. A microscopic
transport approach, namely the quark gluon string model (QGSM) which has been
extended for a locally density-dependent partonic rearrangement and fusion
procedure served as the tool for this investigations. The model emulates
effectively the dynamics of a strongly coupled quark plasma and final hadronic
interactions. Main QGSM results on anisotropic flow components v1 and v2 at top
RHIC energy are compiled. Predictions for the pseudorapidity dependence of
directed and elliptic flow in Pb+Pb collisions under LHC conditions are
presented.


title: Tunable spin-gaps in a quantum-confined geometry

abstract:
  We have studied the interplay of a giant spin-orbit splitting and of quantum
confinement in artificial Bi-Ag-Si trilayer structures. Angle-resolved
photoelectron spectroscopy (ARPES) reveals the formation of a complex
spin-dependent gap structure, which can be tuned by varying the thickness of
the Ag buffer layer. This provides a means to tailor the electronic structure
at the Fermi energy, with potential applications for silicon-compatible
spintronic devices.


title: Development of signal-extraction scheme for Resonant Sideband Extraction

abstract:
  As a future plan, an advanced gravitational-wave detector will employ an
optical configuration of resonant sideband extraction (RSE), achieved with an
additional mirror at the signal-detection port of the power-recycled
Fabry-Perot Michelson interferometer. To control the complex coupled cavity
system, one of the most important design issues is how to extract the
longitudinal control signals of the cavities. We developed a new
signal-extraction scheme which provides an appropriate sensing matrix. The new
method uses two sets of sidebands: one of the sideband components satisfies the
critical coupling ondition for the RSE interferometer and reaches the
signal-extraction port, and the other sideband is completely reflected by the
Michelson interferometer. They provide a diagonalized sensing matrix and enable
the RSE control to be robust.


title: On the effects at colliding mu-meson beams

abstract:
  Possible influence of the weak interaction on the $\mu^+ + \mu^- \to \mu^+ +
\mu^- $ scattering and the $\mu^+ + \mu^- \to e^+ + e^- $ reaction, both
through the neutral lepton currents and the charged ones (in the second order
on weak constant), are considered.
  The calculations show that $P$ - odd effects in the mentioned processes would
prove the existence of the neutral currents which, in their turn, give the
principal basis for explanation of the mass difference of a muon and an
electron from the point of view of Ref. [1].


title:
Medium polarization and finite size effects on the superfluidity of the
  inner crust of neutron stars

abstract:
  The 1S0 pairing gap associated with the inner crust of a neutron star is
calculated, taking into account the coexistence of the nuclear lattice with the
sea of free neutrons (finite size effects), as well as medium polarization
effects associated with the exchange of density and spin fluctuations. Both
effects are found to be important and to lead to an overall quenching of the
pairing gap. This result, whose quantitative value is dependent on the
effective interaction used to generate the single-particle levels, is a
consequence of the balance between the attractive (repulsive) induced
interaction arising from the exchange of density (spin) modes, balance which in
turn is influenced by the presence of the protons and depends on the
single-particle structure of the system.


title: Particles and fields within a unification scheme

abstract:
  We discuss properties of particles and fields in a multi-dimensional
space-time, where the geometrization of gauge interactions can be performed.
For instance, in a 5-dimensional Kaluza-Klein manifold we argue that the motion
of charged spinning bodies is obtain in a Papapetrou-like formulation. As far
as spinors are concerned, we outline how the gauge coupling can be recognized
by a proper dependence on extra-coordinates and by the dimensional reduction
procedure.


title:
DimReduction - Interactive Graphic Environment for Dimensionality
  Reduction

abstract:
  Feature selection is a pattern recognition approach to choose important
variables according to some criteria to distinguish or explain certain
phenomena. There are many genomic and proteomic applications which rely on
feature selection to answer questions such as: selecting signature genes which
are informative about some biological state, e.g. normal tissues and several
types of cancer; or defining a network of prediction or inference among
elements such as genes, proteins, external stimuli and other elements of
interest. In these applications, a recurrent problem is the lack of samples to
perform an adequate estimate of the joint probabilities between element states.
A myriad of feature selection algorithms and criterion functions are proposed,
although it is difficult to point the best solution in general. The intent of
this work is to provide an open-source multiplataform graphical environment to
apply, test and compare many feature selection approaches suitable to be used
in bioinformatics problems.


title: Ion beam induced enhanced diffusion from gold thin films in silicon

abstract:
  Enhanced diffusion of gold atoms into silicon substrate has been studied in
Au thin films of various thicknesses (2.0, 5.3, 10.9 and 27.5 nm) deposited on
Si(111) and followed by irradiation with 1.5 MeV Au2+ at a flux of 6.3x10^12
ions cm-2 s-1 and fluence up to 1x10^15 ions cm-2. The high resolution
transmission electron microscopy measurements showed the presence of gold
silicide formation for the above-mentioned systems at fluence greater than
equal to 1x1014 ions cm-2. The maximum depth to which the gold atoms have been
diffused at a fluence of 1x10^14 ions cm-2 for the cases of 2.0, 5.3, 10.9 and
27.5 nm thick films has been found to be 60, 95, 160 and 13 nm respectively.
Interestingly, at higher fluence of 1x1015 ions cm-2 in case of 27.5 nm thick
film, gold atoms from the film transported to a maximum depth of 265 nm in the
substrate. The substrate silicon is found to be amorphous at the above fluence
values where unusually large mass transport occurred. Enhanced diffusion has
been explained on the basis of ion beam induced, flux dependent amorphous
nature of the substrate, and transient beam induced temperature effects. This
work confirms the absence of confinement effects that arise from spatially
confined structures and existence of thermal and chemical reactions during ion
irradiation.


title:
Dopant-dependent impact of Mn-site doping on the critical-state
  manganites: R0.6Sr0.4MnO3 (R=La, Nd, Sm, and Gd)

abstract:
  Versatile features of impurity doping effects on perovskite manganites,
$R_{0.6}$Sr$_{0.4}$MnO$_{3}$, have been investigated with varying the doing
species as well as the $R$-dependent one-electron bandwidth. In
ferromagnetic-metallic manganites ($R$=La, Nd, and Sm), a few percent of Fe
substitution dramatically decreases the ferromagnetic transition temperature,
leading to a spin glass insulating state with short-range charge-orbital
correlation. For each $R$ species, the phase diagram as a function of Fe
concentration is closely similar to that for $R_{0.6}$Sr$_{0.4}$MnO$_{3}$
obtained by decreasing the ionic radius of $R$ site, indicating that Fe doping
in the phase-competing region weakens the ferromagnetic double-exchange
interaction, relatively to the charge-orbital ordering instability. We have
also found a contrastive impact of Cr (or Ru) doping on a spin-glass insulating
manganite ($R$=Gd). There, the impurity-induced ferromagnetic magnetization is
observed at low temperatures as a consequence of the collapse of the inherent
short-range charge-orbital ordering, while Fe doping plays only a minor role.
The observed opposite nature of impurity doping may be attributed to the
difference in magnitude of the antiferromagnetic interaction between the doped
ions.


title: Regular motions in double bars. II. Survey of trajectories and 23 models

abstract:
  We show that stable double-frequency orbits form the backbone of double bars,
because they trap around themselves regular orbits, as stable closed periodic
orbits do in single bars, and in both cases the trapped orbits occupy similar
volume of phase-space. We perform a global search for such stable
double-frequency orbits in a model of double bars by constructing maps of
trajectories with initial conditions well sampled over the available
phase-space. We use the width of a ring sufficient to enclose a given map as
the indicator of how tightly the trajectory is trapped around a
double-frequency orbit. We construct histograms of these ring widths in order
to determine the fraction of phase-space occupied by ordered motions. We build
22 further models of double bars, and we construct histograms showing the
fraction of the phase-space occupied by regular orbits in each model. Our
models indicate that resonant coupling between the bars may not be the dominant
factor reducing chaos in the system.


title: The TOTEM Experiment at LHC

abstract:
  The TOTEM experiment at the CERN LHC is here presented. After an overview of
the experimental apparatus, the measurement of the total pp cross section,
elastic scattering and diffractive phenomena is described. This physics
programme will allow to distinguish among different models of soft proton
interactions


title: Electron and Photon Energy Deposition in Universe

abstract:
  We consider energy deposition of high energy electrons and photons in
universe. We carry out detailed calculations of fractions of the initial energy
of the injected electron or photon which are used to heat, ionize and excite
background plasma in the early universe for various ionization states and
redshifts.


title: The volume flux group and nonpositive curvature

abstract:
  We show that every closed nonpositively curved manifold with non-trivial
volume flux group has zero minimal volume, and admits a finite covering with
circle actions whose orbits are homologically essential. This proves a
conjecture of Kedra-Kotschick-Morita for this class of manifolds.


title:
Can Quantum Gravitational Effects Influence the Entire History of the
  Universe?

abstract:
  In this work, a flat Friedmann-Robertson-Walker (FRW) universe with dust and
a cosmological constant is quantized. By means of a canonical transformation,
the classical Hamiltonian is reduced to that of either a harmonic oscillator or
anti-oscillator, depending on whether $\Lambda<0$ or $\Lambda>0$, respectively.
In this way exact solutions to the Wheeler-DeWitt equation can easily be
obtained. It turns out that a positive cosmological constant alone may account
for an early inflationary regime and a later accelerated expansion phase, with
a period of decelerated expansion in between. This suggests that quantum
gravitational effects can influence most of the history or even the entire
history of the Universe.


title:
Intuitive visualization of the intelligence for the run-down of
  terrorist wire-pullers

abstract:
  The investigation of the terrorist attack is a time-critical task. The
investigators have a limited time window to diagnose the organizational
background of the terrorists, to run down and arrest the wire-pullers, and to
take an action to prevent or eradicate the terrorist attack. The intuitive
interface to visualize the intelligence data set stimulates the investigators'
experience and knowledge, and aids them in decision-making for an immediately
effective action. This paper presents a computational method to analyze the
intelligence data set on the collective actions of the perpetrators of the
attack, and to visualize it into the form of a social network diagram which
predicts the positions where the wire-pullers conceals themselves.


title: Projectivity of analytic Hilbert and Kaehler quotients

abstract:
  We investigate algebraicity properties of quotients of complex spaces by
complex reductive Lie groups G. We obtain a projectivity result for compact
momentum map quotients of algebraic G-varieties. Furthermore, we prove
equivariant versions of Kodaira's Embedding Theorem and Chow's Theorem relative
to an analytic Hilbert quotient. Combining these results we derive an
equivariant algebraisation theorem for complex spaces with projective quotient.


title: Finite quantum dissipation: the challenge of obtaining specific heat

abstract:
  We consider a free particle coupled with finite strength to a bath and
investigate the evaluation of its specific heat. A harmonic oscillator bath of
Drude type with cutoff frequency omega_D is employed to model an ohmic friction
force with dissipation strength gamma. Two scenarios for obtaining specific
heat are presented. The first one uses the measurement of the kinetic energy of
the free particle while the second one is based on the reduced partition
function. Both descriptions yield results which are consistent with the Third
Law of thermodynamics. Nevertheless, the two methods produce different results
that disagree even in their leading quantum corrections at high temperatures.
We also consider the regime where the cutoff frequency is smaller than the
friction strength, i.e. omega_D<gamma. There, we encounter puzzling results at
low temperatures where the specific heat based on the thermodynamic
prescription becomes negative. This anomaly is rooted in an ill-defined density
of states of the damped free particle which assumes unphysical negative values
when gamma/omega_D>1.


title: Local controllability of quantum networks

abstract:
  We give a sufficient criterion that guarantees that a many-body quantum
system can be controlled by properly manipulating the (local) Hamiltonian of
one of its subsystems. The method can be applied to a wide range of systems: it
does not depend on the details of the couplings but only on their associated
topology. As a special case, we prove that Heisenberg and
Affleck-Kennedy-Lieb-Tasaki chains can be controlled by operating on one of the
spins at their ends. In principle, arbitrary quantum algorithms can be
performed on such chains by acting on a single qubit.


title:
Projective-anticipating, projective, and projective-lag synchronization
  of time-delayed chaotic systems on random networks

abstract:
  We study projective-anticipating, projective, and projective-lag
synchronization of time-delayed chaotic systems on random networks. We relax
some limitations of previous work, where projective-anticipating and
projective-lag synchronization can be achieved only on two coupled chaotic
systems. In this paper, we can realize projective-anticipating and
projective-lag synchronization on complex dynamical networks composed by a
large number of interconnected components. At the same time, although previous
work studied projective synchronization on complex dynamical networks, the
dynamics of the nodes are coupled partially linear chaotic systems. In this
paper, the dynamics of the nodes of the complex networks are time-delayed
chaotic systems without the limitation of the partial-linearity. Based on the
Lyapunov stability theory, we suggest a generic method to achieve the
projective-anticipating, projective, and projective-lag synchronization of
time-delayed chaotic systems on random dynamical networks and find both the
existence and sufficient stability conditions. The validity of the proposed
method is demonstrated and verified by examining specific examples using Ikeda
and Mackey-Glass systems on Erdos-Renyi networks.


title:
Theory of superconducting and nonsuperconducting stripe phases in the
  hole-doped superconductor Ca{2-x}Na{x}CuO{2}Cl{2} (x=1/8,1/16)

abstract:
  Based on the newly developed real-space spin-parallel pairing and
superconducting theory, we explore a simple explanation for the observed
checkerboard patterns in hole-doped Ca{2-x}Na{x}CuO{2}Cl{2} cuprate
superconductor. At a hole concentration x=1/8=0.125, the analytical results
show that there exists a phase competition between non-superconducting 4a*4b
(a=b) checkerboard phase and 8a*2c superconducting vortex phase, where a, b and
c are the lattice constants of the superconductor. At a lower hole
concentration x=1/16=0.0625, it is revealed that the metastable
4\sqrt{2}a*4\sqrt{2}a checkerboard phase can reorganize itself into a more
stable octahedron phase with the 4a*4a checkerboard symmetry.


title: Horizons in Robinson-Trautman space-times

abstract:
  The past quasi-local horizons in vacuum Robinson-Trautman spacetimes are
described. The case of a null (non-expanding) horizon is discussed. It is shown
that the only Robinson-Trautman space-time admitting such a horizon with
sections diffeomorphic to S_2 is the Schwarzschild space-time. Weakening this
condition leads to the horizons of the C-metric. Properties of the hypersurface
r=2m for finite retarded time u are examined.


title: Karhunen-Loeve Basis Functions of Kolmogorov Turbulence in the Sphere

abstract:
  The statistically independent Karhunen-Loeve modes of refractive indices with
isotropic Kolmogorov spectrum of the covariance are calculated in a sphere of
given radius, rendered as series of 3D Zernike functions. Many of the symmetry
arguments of the associated 2D problem for the circular input pupil remain
valid. The technique of efficient diagonalization of the eigenvalue problem in
wavenumber space is founded on the Fourier representation of the 3D Zernike
basis.