title:
Deformations and clustering correlations in $p$- and $sd$-shell nuclei
  using the Gogny and Skyrme interactions

abstract:
  Structures of $p$- and $sd$-shell nuclei are studied with the deformed-basis
antisymmetrized molecular dynamics method using the Gogny D1S and Skyrme SLy7
forces as effective interactions. By the energy variation with a constraint,
energy curves as functions of quadrupole deformation parameter $\beta$ are
obtained. The energy curves for $sd$-shell nuclei show structure change as a
function of $\beta$, and suggest shape coexistence. Nuclear structures in the
deformed region are discussed focusing on deformations and clustering. It is
found that the deformations often involve cluster structures.
Effective-interaction dependence is also discussed comparing the results
obtained with the two effective interactions. Although the two forces give
similar results when cluster structures do not develop clearly, they give
different energies in the largely deformed region when an $\alpha$ cluster
develops.


title: Renormalization Group Approach to Oscillator Synchronization

abstract:
  We develop a renormalization group method to investigate synchronization
clusters in a one-dimensional chain of nearest-neighbor coupled phase
oscillators. The method is best suited for chains with strong disorder in the
intrinsic frequencies and coupling strengths. The results are compared with
numerical simulations of the chain dynamics and good agreement in several
characteristics is found. We apply the renormalization group and simulations to
Lorentzian distributions of intrinsic frequencies and couplings and investigate
the statistics of the resultant cluster sizes and frequencies, as well as the
dependence of the characteristic cluster length upon parameters of these
Lorentzian distributions.


title: Combining Semantic Wikis and Controlled Natural Language

abstract:
  We demonstrate AceWiki that is a semantic wiki using the controlled natural
language Attempto Controlled English (ACE). The goal is to enable easy creation
and modification of ontologies through the web. Texts in ACE can automatically
be translated into first-order logic and other languages, for example OWL.
Previous evaluation showed that ordinary people are able to use AceWiki without
being instructed.


title: X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku

abstract:
  We conducted a target of opportunity X-ray observation of the classical nova
V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a
20 ks exposure, the X-ray Imaging Spectrometer detected X-ray emission
significantly harder than typical super-soft source emission. The X-ray
spectrum shows K lines from N, Ne, Mg, Si, and S, and L-series emission from Fe
in highly ionized states. The spectrum can be described by a single temperature
(0.64 keV) thin thermal plasma model in collisional equilibrium with a
hydrogen-equivalent extinction column density of ~3e21/cm2, a flux of ~1e-12
erg/s/cm2, and a luminosity of ~6e34 erg/s in the 0.3-3.0 keV band at an
assumed distance of 13 kpc. We found a hint of an enhancement of N and
deficiencies of O and Fe relative to other metals. The observed X-ray
properties can be interpreted as the emission arising from shocks of ejecta
from an ONe-type nova.


title: Fluctuations of Goldstone modes and the chiral transition in QCD

abstract:
  We provide evidence for the influence of thermal fluctuations of Goldstone
modes on the chiral condensate at finite temperature. We show that at fixed
temperature, T<Tc, in the vicinity of the chiral transition temperature this
leads to a characteristic dependence of the chiral condensate on the square
root of the light quark mass (m_l), which is expected for 3-dimensional models
with broken O(N) symmetry. As a consequence the chiral susceptibility shows a
strong quark mass dependence for all temperatures below Tc and diverges like
1/sqrt(m_l) in the chiral limit.


title: Occupancy Schemes Associated to Yule Processes

abstract:
  An occupancy problem with an infinite number of bins and a random probability
vector for the locations of the balls is considered. The respective sizes of
bins are related to the split times of a Yule process. The asymptotic behavior
of the landscape of first empty bins, i.e., the set of corresponding indices
represented by point processes, is analyzed and convergences in distribution to
mixed Poisson processes are established. Additionally, the influence of the
random environment, the random probability vector, is analyzed. It is
represented by two main components: an i.i.d. sequence and a fixed random
variable. Each of these components has a specific impact on the qualitative
behavior of the stochastic model. It is shown in particular that for some
values of the parameters, some rare events, which are identified, play an
important role on average values of the number of empty bins in some regions.


title:
Chiral Logarithms in $\Delta S=1$ Kaon Decay Amplitudes in General
  Effective Flavor Theories

abstract:
  We study the chiral logarithms in $\Delta S=1$ kaon decay amplitudes from new
flavor physics in beyond-standard-model theories. We systematically classify
the chiral structures of dimension-5, 6 and 7 effective QCD operators
constructed out of light-quark (up, down and strange) and gluon fields. Using
the standard chiral perturbation theory, we calculate the leading
chiral-logarithms associated with these operators. The result is useful for
lattice calculations of the QCD matrix elements in $K\to \pi\pi$ decay
necessary, for example, to understand the physical origin of the direct CP
violation parameter $\epsilon'$. As a concrete example, we consider the new
operators present in minimal left-right symmetric models.


title: Milnor fibrations of meromorphic functions

abstract:
  In analogy with the holomorphic case, we compare the topology of
  Milnor fibrations associated to a meromorphic germ f/g : the local Milnor
fibrations given on Milnor tubes over punctured discs around the critical
values of f/g, and the Milnor fibration on a sphere.


title: Le logo du CNRS est-il convexe ?

abstract:
  In october 2008, CNRS adopts a new logo with a round shape. We study the
mathematical representation of this shape, and in particular its convexity.


title: Phenomenological Implications of a Class of Lepton Mass Matrices

abstract:
  Phenomenological implications of a class of lepton mass matrices with
parallel texture structure have been examined and phenomenologically
interesting constraints on charged lepton and neutrino mass matrix parameters
have been obtained.


title:
Termination Control of the Interface Dipole in
  La$_{0.7}$Sr$_{0.3}$MnO$_3$/Nb:SrTiO$_3$ (001) Schottky Junctions

abstract:
  In order to investigate the interface termination dependence of perovskite
band alignments, we have studied the Schottky barrier height at
La$_{0.7}$Sr$_{0.3}$MnO$_3$/Nb:SrTiO$_3$ (001) heterointerfaces. As the
Nb:SrTiO$_3$ semiconductor was varied from TiO$_2$ termination to SrO
termination by variable insertion of a SrMnO$_3$ layer, a large systematic
increase in the Schottky barrier height was observed. This can be ascribed to
the evolution of the interface dipole induced to screen the polar discontinuity
at the interface, which gives a large internal degree of freedom for tuning
band diagrams in oxides.


title:
Disordered driven lattice gases with boundary reservoirs and Langmuir
  kinetics

abstract:
  The asymmetric simple exclusion process with additional Langmuir kinetics,
i.e. attachment and detachment in the bulk, is a paradigmatic model for
intracellular transport. Here we study this model in the presence of randomly
distributed inhomogeneities ('defects'). Using Monte Carlo simulations, we find
a multitude of coexisting high- and low-density domains. The results are
generic for one-dimensional driven diffusive systems with short-range
interactions and can be understood in terms of a local extremal principle for
the current profile. This principle is used to determine current profiles and
phase diagrams as well as statistical properties of ensembles of defect
samples.


title: Open heavy flavour reconstruction in the ALICE central barrel

abstract:
  The ALICE experiment will be able to detect open charm and beauty hadrons in
proton-proton and heavy ion collisions in the new energy regime of the CERN
Large Hadron Collider (LHC). Heavy flavours are a powerful tool to investigate
the medium created in high energy nucleus--nucleus interactions because they
are produced in the hard scatterings occurring at early times and, thanks to
their long lifetime on the collision timescale, they probe all the stages of
the system evolution. The detectors of the ALICE central barrel ($-0.9 < \eta <
0.9$) will allow to track charged particles down to low transverse momentum
($\approx$ 100 MeV/$c$) and will provide hadron and electron identification as
well as an accurate measurement of the positions of primary and secondary
vertices. It will therefore be possible to measure the production of open heavy
flavours in the central rapidity region down to low transverse momentum,
exploiting the semi-electronic and the hadronic decay channels. Here we present
a general overview of the ALICE perspectives for heavy flavour physics and some
examples from the open charm and beauty analyses which have been developed and
tested on detailed simulations of the experimental apparatus.


title:
World-sheet Instanton Superpotentials in Heterotic String theory and
  their Moduli Dependence

abstract:
  To understand in detail the contribution of a world-sheet instanton to the
superpotential in a heterotic string compactification, one has to understand
the moduli dependence (bundle and complex structure moduli) of the one-loop
determinants from the fluctuations, which accompany the classical exponential
contribution (involving K\"ahler moduli) when evaluating the world-volume
partition function. Here we use techniques to describe geometrically these
Pfaffians for spectral bundles over rational base curves in elliptically
fibered Calabi-Yau threefolds, and provide a (partially exhaustive) list of
cases involving {\em factorising} (or vanishing) superpotential. This gives a
conceptual explanation and generalisation of the few previously known cases
which were obtained just experimentally by a numerical computation.


title:
Spacetime analogue of Bose-Einstein condensates: Bogoliubov-de Gennes
  formulation

abstract:
  We construct quantum field theory in an analogue curved spacetime in
Bose-Einstein condensates based on the Bogoliubov-de Gennes equations, by
exactly relating quantum particles in curved spacetime with Bogoliubov
quasiparticle excitations in Bose-Einstein condensates. Here, we derive a
simple formula relating the two, which can be used to calculate the particle
creation spectrum by solving the time-dependent Bogoliubov-de Gennes equations.
Using our formulation, we numerically investigate particle creation in an
analogue expanding Universe which can be expressed as Bogoliubov quasiparticles
in an expanding Bose-Einstein condensate. We obtain its spectrum, which follows
the thermal Maxwell-Boltzmann distribution, the temperature of which is
experimentally attainable. Our derivation of the analogy is useful for general
Bose-Einstein condensates and not limited to homogeneous ones, and our
simulation is the first example of particle creations by solving the
Bogoliubov-de Gennes equation in an inhomogeneous condensate.


title:
Nonextensive perfect hydrodynamics - a model of dissipative relativistic
  hydrodynamics?

abstract:
  We demonstrate that nonextensive perfect relativistic hydrodynamics
($q$-hydrodynamics) can serve as a model of the usual relativistic dissipative
hydrodynamics ($d$-hydrodynamics) facilitating therefore considerably its
applications. As illustration we show how using $q$-hydrodynamics one gets the
$q$-dependent expressions for the dissipative entropy current and the
corresponding ratios of the bulk and shear viscosities to entropy density,
$\zeta/s$ and $\eta/s$.


title: Bidual as a weak nonstandard hull

abstract:
  We construct the weak nonstandard hull of a normed linear space X from *X
(the nonstandard extension of X) using the weak topology on X. The bidual (i.e.
the second dual) X" is shown to be isometrically isomorphic to the weak
nonstandard hull of X. Examples and applications to C*-algebras are given,
including a simple proof of the Sherman-Takeda Theorem. As a consequence, the
weak nonstandard hull of a C*-algebra is always a von Neumann algebra. Moreover
a natural representation of the Arens product is given.


title: Abelian Vortex in Bagger-Lambert-Gustavsson Theory

abstract:
  Among newly discovered M2, M5 objects in the Bagger-Lambert-Gustavsson
theory, our interest is about half BPS vortices which are covariantly
holomorphic curves in transverse coordinates. We restrict ourselves to the case
where the global symmetry is broken to so(2) x so(2)x so(4) for the mass
deformed Bagger-Lambert theory. A localized object with finite energy exists in
this theory where the mass parameter supports regularity. It is time
independent but carries angular momentum coming solely from the gauge potential
by which the energy is bounded below.


title:
Foundation of Statistical Mechanics under experimentally realistic
  conditions

abstract:
  We demonstrate the equilibration of isolated macroscopic quantum systems,
prepared in non-equilibrium mixed states with significant population of many
energy levels, and observed by instruments with a reasonably bound working
range compared to the resolution limit. Both properties are fulfilled under
many, if not all, experimentally realistic conditions. At equilibrium, the
predictions and limitations of Statistical Mechanics are recovered.


title: Detect overlapping and hierarchical community structure in networks

abstract:
  Clustering and community structure is crucial for many network systems and
the related dynamic processes. It has been shown that communities are usually
overlapping and hierarchical. However, previous methods investigate these two
properties of community structure separately. This paper proposes an algorithm
(EAGLE) to detect both the overlapping and hierarchical properties of complex
community structure together. This algorithm deals with the set of maximal
cliques and adopts an agglomerative framework. The quality function of
modularity is extended to evaluate the goodness of a cover. The examples of
application to real world networks give excellent results.


title:
Collective Electron Dynamics in Metallic and Semiconductor
  Nanostructures

abstract:
  Understanding the electron dynamics and transport in metallic and
semiconductor nanostructures -- such as metallic nanoparticles, thin films,
quantum wells and quantum dots -- represents a considerable challenge for
today's condensed matter physics, both fundamental and applied. In this review
article, we will describe the collective electron dynamics in metallic and
semiconductor nanostructures using different, but complementary, approaches.
For small excitations (linear regime), the spectral properties can be
investigated via quantum mean-field models of the TDLDA type (time-dependent
local density approximation), generalized to account for a finite electron
temperature. In order to explore the nonlinear regime (strong excitations), we
will adopt a phase-space approach that relies on the resolution of kinetic
equations in the classical phase space (Vlasov and Wigner equations). The
phase-space approach provides a useful link between the classical and quantum
dynamics and is well suited to model effects beyond the mean field
approximation (electron-electron and electron-phonon collisions). We will also
develop a quantum hydrodynamic model, based on velocity moments of the
corresponding Wigner distribution function: this approach should lead to
considerable gains in computing time in comparison with simulations based on
conventional methods, such as density functional theory (DFT). Finally, the
magnetization (spin) dynamics will also be addressed.


title: Intermittent outgassing through a non-Newtonian fluid

abstract:
  We report an experimental study of the intermittent dynamics of a gas flowing
through a column of a non-Newtonian fluid. In a given range of the imposed
constant flow rate, the system spontaneously alternates between two regimes:
bubbles emitted at the bottom either rise independently one from the other or
merge to create a winding flue which then connects the bottom air entrance to
the free surface. The observations are reminiscent of the spontaneous changes
in the degassing regime observed on volcanoes and suggest that, in the nature,
such a phenomenon is likely to be governed by the non-Newtonian properties of
the magma. We focus on the statistical distribution of the lifespans of the
bubbling and flue regimes in the intermittent steady state. The bubbling regime
exhibits a characteristic time whereas, interestingly, the flue lifespan
displays a decaying power-law distribution. The associated exponent, which is
significantly smaller than the value 1.5 often reported experimentally and
predicted in some standard intermittency scenarios, depends on the fluid
properties and can be interpreted as the ratio of two characteristic times of
the system.


title:
Measurement of Diffractive Scattering of Photons with Large Momentum
  Transfer at HERA

abstract:
  The first measurement of diffractive scattering of quasi-real photons with
large momentum transfer gamma p -> gamma Y, where Y is the proton dissociative
system, is made using the H1 detector at HERA. The measurement is performed for
initial photon virtualities Q^2 < 0.01 GeV^2. Cross sections are measured as a
function of W, the incident photon-proton entre of mass energy, and t, the
square of the four-momentum transferred at the proton vertex, in the range 175
< W < 247 GeV and 4<|t|<36 GeV^2. The W dependence is well described by a model
based on perturbative QCD using a leading logarithmic approximation of the BFKL
evolution. The measured |t| dependence is harder than that predicted by the
model and those observed in exclusive vector meson production.


title: Multiloop Bubbles for hot QCD

abstract:
  In this article, we present analytical expansion results of two single mass
scale four-loop vacuum integrals in d=3-2*ep dimensions. After finding
hypergeometric representations with half-integer coefficients, we use
algorithms which we implemented in FORM to expand these in terms of nested
sums.


title:
Probabilistic characterisation of Besov-Lipschitz spaces on metric
  measure spaces

abstract:
  We give a probabilistic characterisation of the Besov-Lipschitz spaces
$Lip(\alpha,p,q)(X)$ on domains which support a Markovian kernel with
appropriate exponential bounds. This extends former results of
\cite{Jon,KPP1,KPP2,GHL} which were valid for $\alpha=\frac{d_w}{2},p=2$,
$q=\infty,$ where $d_w$ is the walk dimension of the space $X.$


title: Remarks on the Proton Structure

abstract:
  Elastic and inelastic cross section of proton-proton and electron-proton
scattering are discussed. Special attention is given to elastic scattering and
to the striking difference between the data of these two kinds of experiments.
It is shown that the regular charge-monopole theory explains the main features
of the data. Predictions of results of CERN's Large Hadron Collider are pointed
out.


title:
Magnetization dynamics down to zero field in dilute (Cd,Mn)Te quantum
  wells

abstract:
  The evolution of the magnetization in (Cd,Mn)Te quantum wells after a short
pulse of magnetic field was determined from the giant Zeeman shift of
spectroscopic lines. The dynamics in absence of magnetic field was found to be
up to three orders of magnitude faster than that at 1 T. Hyperfine interaction
and strain are mainly responsible for the fast decay. The influence of a hole
gas is clearly visible: at zero field anisotropic holes stabilize the system of
Mn ions, while in a magnetic field of 1 T they are known to speed up the decay
by opening an additional relaxation channel.


title: Quantum Fields on Star Graphs with Bound States at the Vertex

abstract:
  We investigate the propagation of a massless scalar field on a star graph,
modeling the junction of $n$ quantum wires. The vertex of the graph is
represented by a point-like impurity (defect), characterized by a one-body
scattering matrix. The general case of off-critical scattering matrix with
bound and/or antibound states is considered. We demonstrate that the
contribution of these states to the scalar field is fixed by causality (local
commutativity), which is the key point of our investigation. Two different
regimes of the theory emerge at this stage. If bound sates are absent, the
energy is conserved and the theory admits unitary time evolution. The behavior
changes if bound states are present, because each such state generates a kind
of damped harmonic oscillator in the spectrum of the field. These oscillators
lead to the breakdown of time translation invariance. We study in both regimes
the electromagnetic conductance of the Luttinger liquid on the quantum wire
junction. We derive an explicit expression for the conductance in terms of the
scattering matrix and show that antibound and bound states have a different
impact, giving raise to oscillations with exponentially damped and growing
amplitudes respectively.

categories: hep-th cond-mat.mes-hall cond-mat.str-el math-ph math.MP


title: On Vanishing and Cofiniteness of Generalized Local Cohomology Modules

abstract:
  In this paper, some results on vanishing and non-vanishing of generalized
local cohomology modules are presented and some relations between those modules
and, Ext and ordinary local cohomology modules are studied. Also, several
cofiniteness propositions for generalized local cohomology modules are
established which, among other things, provide an alternative answer to a
question in [Y2].


title: Darboux polynomials for Lotka-Volterra systems in three dimensions

abstract:
  We consider Lotka-Volterra systems in three dimensions depending on three
real parameters. By using elementary algebraic methods we classify the Darboux
polynomials (also known as second integrals) for such systems for various
values of the parameters, and give the explicit form of the corresponding
cofactors. More precisely, we show that a Darboux polynomial of degree greater
than one is reducible. In fact, it is a product of linear Darboux polynomials
and first integrals.


title:
Fourier Analysis of the Parametric Resonance of the Neutrino Oscillation
  in the Presence of Inhomogeneous Matter

abstract:
  We study the parametric resonance of the neutrino oscillation through the
matter whose density varies spatially. The Fourier analysis of the matter
effect enables us to clarify the parametric resonance condition, which is
summarized in a frequency matching between the neutrino oscillation and the
spatial variation of the matter density. As a result, the n-th Fourier mode of
a matter density profile modifies the energy spectrum of the nu_mu -> nu_e
appearance probability at around the n-th dip.


title: Tomographic analysis of reflectometry data II: the phase derivative

abstract:
  A tomographic technique has been used in the past to decompose complex
signals in its components. The technique is based on spectral decomposition and
projection on the eigenvectors of a family of unitary operators. Here this
technique is also shown to be appropriate to obtain the instantaneous phase
derivative of the signal components. The method is illustrated on simulated
data and on data obtained from plasma reflectometry experiments in the Tore
Supra.


title: From Axions to Other WISPs

abstract:
  We illustrate, taking a top-down point of view, how axions and other very
weakly interacting sub-eV particles (WISPs) arise in the course of
compactification of the extra spatial dimensions in string/M-theory.


title:
A primitive derivation and logarithmic differential forms of Coxeter
  arrangements

abstract:
  Let $W$ be a finite irreducible real reflection group, which is a Coxeter
group. We explicitly construct a basis for the module of differential 1-forms
with logarithmic poles along the Coxeter arrangement by using a primitive
derivation. As a consequence, we extend the Hodge filtration, indexed by
nonnegative integers, into a filtration indexed by all integers. This
filtration coincides with the filtration by the order of poles. The results are
translated into the derivation case.


title:
Two bright submillimeter galaxies in a z=4.05 proto-cluster in
  GOODS-North, and accurate radio-infrared photometric redshifts

abstract:
  We present the serendipitous discovery of z=4.05 molecular gas CO emission
lines with the IRAM Plateau de Bure interferometer coincident with GN20 and
GN20.2, two luminous submillimeter galaxies (SMGs) in the Great Observatories
Origins Deep Survey North field (GOODS-N). These are among the most distant
submillimeter-selected galaxies reliably identified through CO emission and
also some of the most luminous known. In terms of CO to bolometric
luminosities, stellar mass and star formation rates (SFRs), these newly
discovered z>4 SMGs are similar to z~1.5-3 SMGs studied to date. These z~4 SMGs
have much higher specific SFRs than typical B-band dropout Lyman break galaxies
at the same redshift. The stellar mass-SFR correlation for normal galaxies does
not seem to evolve much further, between z~2 and z~4. A significant z=4.05
spectroscopic redshift spike is observed in GOODS-N, and a strong spatial
overdensity of B-band dropouts and IRAC selected z>3.5 galaxies appears to be
centered on the GN20 and GN20.2 galaxies. This suggests a proto-cluster
structure with total mass ~10^14 Msun. Using photometry at mid-IR, submm and
radio wavelengths, we show that reliable photometric redshifts (Dz/(1+z)~0.1)
can be derived for SMGs over 1<z<4. This new photometric redshift technique has
been used to provide a first estimate of the space density of 3.5<z<6
hyper-luminous starburst galaxies, and to show that they contribute
substantially to the SFR density at early epochs. Many of these high-redshift
starbursts will be within reach of Herschel. We find that the radio to mid-IR
flux density ratio can be used to select z>3.5 starbursts, regardless of their
submm/mm emission [abridged].


title:
Far-infrared spectra of hydrous silicates at low temperatures -
  Providing laboratory data for Herschel and ALMA

abstract:
  Hydrous silicates occur in various cosmic environments, and are among the
minerals with the most pronounced bands in the far infrared (FIR) spectral
region. Given that Herschel and ALMA will open up new possibilities for
astronomical FIR and sub-mm spectroscopy, data characterizing the dielectric
properties of these materials at long wavelengths are desirable. We aimed at
examining the FIR spectra of talc, picrolite, montmorillonite, and chamosite,
which belong to four different groups of phyllosilicates. We tabulated
positions and band widths of the FIR bands of these minerals depending on the
dust temperature. By means of powder transmission spectroscopy, spectra of the
examined materials were measured in the wavelength range 25-500 mum at
temperatures of 300, 200, 100, and 10 K. Room-temperature measurements yield
the following results. For talc, a previously unknown band, centered at 98.5
mum, was found, in addition to bands at 56.5 and 59.5 mum. For montmorillonite,
several bands at wavelengths <110 mum were detected, including a band at 105
mum with an FWHM of about 10 mum. Picrolite shows a sharp 77 mum FIR band.
Chamosite is characterized by bands in the 72-92 mum range, and a prominent
band at 277 mum. At decreasing temperature, most of the bands shift to shorter
wavelengths. Examining a potential counterpart of the 105mum band in the
spectra of HD 142527 and HD 100546, we find that the broad band in the spectra
of these young stars - extending from 85 to 125 mum - cannot be due to
montmorillonite or any of the hydrous silicates we studied, since these
materials have sharper bands in the FIR wavelength range than previously
assumed, especially at low temperatures.


title:
Singular Integral Operators on Variable Lebesgue Spaces over Arbitrary
  Carleson Curves

abstract:
  In 1968, Israel Gohberg and Naum Krupnik discovered that local spectra of
singular integral operators with piecewise continuous coefficients on Lebesgue
spaces $L^p(\Gamma)$ over Lyapunov curves have the shape of circular arcs.
About 25 years later, Albrecht B\"ottcher and Yuri Karlovich realized that
these circular arcs metamorphose to so-called logarithmic leaves with a median
separating point when Lyapunov curves metamorphose to arbitrary Carleson
curves. We show that this result remains valid in a more general setting of
variable Lebesgue spaces $L^{p(\cdot)}(\Gamma)$ where $p:\Gamma\to(1,\infty)$
satisfies the Dini-Lipschitz condition. One of the main ingredients of the
proof is a new sufficient condition for the boundedness of the Cauchy singular
integral operator on variable Lebesgue spaces with weights related to
oscillations of Carleson curves.


title:
Coherent Rabi response of a charge-phase qubit under microwave
  irradiation

abstract:
  We report on radio-frequency measurements of the charge-phase qubit being
under continuous microwave irradiation in the state of weak coupling to a
radio-frequency tank circuit. We studied the rf impedance dependence on the two
important parameters such as power of microwave irradiation whose frequency is
close to the gap between the two lowest qubit energy levels, and temperature of
the internal heat bath. We have found that backaction effects of the qubit on
the rf tank, and vice versa, tank on the qubit, lead to a negative as well as a
positive real part of the qubit impedance Re$Z(\omega)$ seen by the tank. We
have implemented noise spectroscopy measurements for direct impedance readout
at the extreme points corresponding to maximum voltage response and obtained
absolute values of about 0.017 $\Omega$ for the negative and positive
Re$Z(\omega)$. Our results demonstrate the existence and persistence of the
coherent single- and multi-photon Rabi dynamics of the qubit with both negative
and positive dynamic resistance inserted into the tank in the temperature range
of 10 to 200 mK.


title: Middle Convolution and Heun's Equation

abstract:
  Heun's equation naturally appears as special cases of Fuchsian system of
differential equations of rank two with four singularities by introducing the
space of initial conditions of the sixth Painlev\'e equation. Middle
convolutions of the Fuchsian system are related with an integral transformation
of Heun's equation.


title:
All optical sub diffraction multilevel data encoding onto azo polymeric
  thin films

abstract:
  By exploiting photo-induced reorientation in azo-polymer thin films, we
demonstrate all-optical polarization-encoded information storage with a
scanning near-field optical microscope. In the writing routine, 5-level bits
are created by associating different bit values to different birefringence
directions, induced in the polymer after illumination with linearly polarized
light. The reading routine is then performed by implementing
polarization-modulation techniques on the same near-field microscope, in order
to measure the encoded birefringence direction.


title:
Evolution of magnetic fields in galaxies and future observational tests
  with the Square Kilometre Array

abstract:
  Aims. We investigate the cosmological evolution of large- and small-scale
magnetic fields in galaxies in the light of present models of formation and
evolution of galaxies. Methods. We use the dynamo theory to derive the
timescales of amplification and ordering of magnetic fields in disk and puffy
galaxies. Turbulence in protogalactic halos generated by thermal virialization
can drive an efficient turbulent dynamo. Results from simulations of
hierarchical structure formation cosmology provide a tool to develop an
evolutionary model of regular magnetic fields coupled with galaxy formation and
evolution. Results. The turbulent (small-scale) dynamo was able to amplify a
weak seed magnetic field in halos of protogalaxies to a few muG strength within
a few 10^8 yr. This turbulent field served as a seed to the mean-field
(large-scale) dynamo. Galaxies similar to the Milky Way formed their disks at
z~10 and regular fields of muG strength and a few kpc coherence length were
generated within 2 Gyr (at z~3), but field-ordering on the coherence scale of
the galaxy size required an additional 6 Gyr (at z~0.5). Giant galaxies formed
their disks at z~10, allowing more efficient dynamo generation of strong
regular fields (with kpc coherence length) already at z~4. However, the age of
the Universe is short for fully coherent fields in giant galaxies larger than
15 kpc to have been achieved. Dwarf galaxies should have hosted fully coherent
fields at z~1. After a major merger, the strength of the turbulent field is
enhanced by a factor of a few. Conclusions. This evolutionary scenario can be
tested by measurements of polarized synchrotron emission and Faraday rotation
with the planned SKA. We predict an anticorrelation between galaxy size and
ratio between ordering scale and galaxy size (abridged).


title: Significance and properties of internucleon correlation functions

abstract:
  We show that a nuclear Hamiltonian and a set of internucleon correlation
functions is in a one-to-one correspondence. The correlation functions for
$s$-shell nuclei interacting via the two-nucleon interaction of AV8$^\prime$
type are calculated to exhibit the importance of tensor correlations as well as
short-range central correlation. The asymptotic behavior of the correlation
functions is also discussed.


title: Instability of fermions with respect to topology fluctuations

abstract:
  We extend our sum over topologies formula to fermions. We show that fermionic
fields display an instability with respect to topology fluctuations. We present
some phenomenological arguments for a modification of the action in the case of
fermions and discuss possible applications.


title: Hunting for the Conformal Window

abstract:
  Undeniably, the imminent activity of LHC and the quest for the nature of
physics beyond the standard model have raised renewed interest in the conformal
and quasi-conformal behaviour of gauge field theories with matter content.
Theoretically driven questions seem to now acquire a strong experimental appeal
and might guide us towards a more realistic string theory to field theory
connection, originally inspired by the AdS/CFT conjecture. In this brief
report, we discuss the state of the art of our search for the conformal window
in the SU(3) colour-gauge theory with fermions in the fundamental
representation.


title: Yambo: an \textit{ab initio} tool for excited state calculations

abstract:
  {\tt yambo} is an {\it ab initio} code for calculating quasiparticle energies
and optical properties of electronic systems within the framework of many-body
perturbation theory and time-dependent density functional theory. Quasiparticle
energies are calculated within the $GW$ approximation for the self-energy.
Optical properties are evaluated either by solving the Bethe--Salpeter equation
or by using the adiabatic local density approximation. {\tt yambo} is a
plane-wave code that, although particularly suited for calculations of periodic
bulk systems, has been applied to a large variety of physical systems. {\tt
yambo} relies on efficient numerical techniques devised to treat systems with
reduced dimensionality, or with a large number of degrees of freedom. The code
has a user-friendly command-line based interface, flexible I/O procedures and
is interfaced to several publicly available density functional ground-state
codes.


title: First results from the NEMO Phase 1 experiment

abstract:
  The NEMO prototype detector, called "NEMO Phase-1", has been successfully
operated at 2000 m depth from December 2006 to May 2007. The apparatus
comprises a \emph{Junction Box} and a \emph{Mini-Tower} hosting 16 optical
sensors. Preliminary results are presented. Positions of the optical sensors in
the Mini-Tower were reconstructed through the acoustic positioning system with
high level accuracy. Environmental parameters were analyzed. From data
corresponding to a livetime of 11.3 hours, atmospheric muon tracks have been
reconstructed and their angular distributions were measured and compared with
Monte Carlo simulations.


title: Temperature effect in the conductance of hydrogen molecule

abstract:
  We present a many-body calculation for the conductance of a conducting bridge
of a simple hydrogen molecule between $Pt$ electrodes.The experimental results
showed that the conductance $G=dI/dV$ has the maximum value near the quantum
unit $G_{0}=2e^{2}/h$.
  The $I-V$ dependence presents peak and dip and we consider that the
electron-phonon interaction is responsible for this behavior. At T=0 there is a
step in this dependence for the energy of phonons $\omega_{0}$ which satisfies
$eV=\omega_{0}$. We calculated the conductance at finite temperature and showed
that $dG(T)/dV\propto 1/4T\cosh^{2}\frac{eV-\omega_{0}}{2T}$.


title:
Asymptotic normality for deconvolution kernel density estimators from
  random fields

abstract:
  The paper discusses the estimation of a continuous density function of the
target random field $X_{\bf{i}}$, $\bf{i}\in \mathbb {Z}^N$ which is
contaminated by measurement errors. In particular, the observed random field
$Y_{\bf{i}}$, $\bf{i}\in \mathbb {Z}^N$ is such that
$Y_{\bf{i}}=X_{\bf{i}}+\epsilon_{\bf{i}}$, where the random error
$\epsilon_{\bf{i}}$ is from a known distribution and independent of the target
random field. Compared to the existing results, the paper is improved in two
directions. First, the random vectors in contrast to univariate random
variables are investigated. Second, a random field with a certain spatial
interactions instead of i. i. d. random variables is studied. Asymptotic
normality of the proposed estimator is established under appropriate
conditions.


title: Some remarks on the geometry of the Standard Map

abstract:
  We define and compute hyperbolic coordinates and associated foliations which
provide a new way to describe the geometry of the standard map. We also
identify a uniformly hyperbolic region and a complementary 'critical' region
containing a smooth curve of tangencies between certain canonical 'stable'
foliations.


title:
On the number of cutpoints of the transient nearest neighbor random walk
  on the line

abstract:
  We consider transient nearest neighbor random walks on the positive part of
the real line. We give criteria for the finiteness of the number of cutpoints
and strong cutpoints. Examples and open problems are presented.


title: Probing the Interior Environment of Carbon Nano-test-tubes

abstract:
  We report the filling of single walled carbon nanotubes with an electron
spin-active fullerene species where a nitroxide radical is functionalized on
the fullerene cage. High resolution transmission electron microscopy (HRTEM),
optical absorption and electron spin resonance (ESR) are used to determine the
rotational behavior of the encapsulated molecules and determine the polar
nature of the nanotube interior.


title:
On the Vocabulary of Grammar-Based Codes and the Logical Consistency of
  Texts

abstract:
  The article presents a new interpretation for Zipf-Mandelbrot's law in
natural language which rests on two areas of information theory. Firstly, we
construct a new class of grammar-based codes and, secondly, we investigate
properties of strongly nonergodic stationary processes. The motivation for the
joint discussion is to prove a proposition with a simple informal statement: If
a text of length $n$ describes $n^\beta$ independent facts in a repetitive way
then the text contains at least $n^\beta/\log n$ different words, under
suitable conditions on $n$. In the formal statement, two modeling postulates
are adopted. Firstly, the words are understood as nonterminal symbols of the
shortest grammar-based encoding of the text. Secondly, the text is assumed to
be emitted by a finite-energy strongly nonergodic source whereas the facts are
binary IID variables predictable in a shift-invariant way.


title: Validity of the one-dimensional limp model for porous materials

abstract:
  A straightforward criterion to determine the limp model validity for porous
materials is addressed here. The limp model is an "equivalent fluid" model
which gives a better description of the porous behavior than the well known
"rigid frame" model. It is derived from the poroelastic Biot model assuming
that the frame has no bulk stiffness. A criterion is proposed to identify the
porous materials for which the limp model can be used. It relies on a new
parameter, the Frame Stiffness Influence FSI based on porous material
properties. The critical values of FSI under which the limp model can be used,
are determined using a 1D analytical modeling for a specific boundary set:
radiation of a vibrating plate covered by a porous layer.


title:
About extension of upper semicontinuous multi-valued maps and
  applications

abstract:
  We formulate a multi-valued version of the Tietze-Urysohn extension theorem.
Precisely, we prove that any upper semicontinuous multi-valued map with
nonempty closed convex values defined on a closed subset (resp. closed
perfectly normal subset) of a completely normal (resp. of a normal) space $X$
into the unit interval $[0,1]$ can be extended to the whole space $X$. The
extension is upper semicontinuous with nonempty closed convex values. We apply
this result for the extension of real semicontinuous functions, the
characterization of completely normal spaces, the existence of Gale-Mas-Colell
and Shafer-Sonnenschein type fixed point theorems and the existence of
equilibrium for qualitative games.


title: A model for infection on graphs

abstract:
  We address the question of understanding the effect of the underlying network
topology on the spread of a virus and the dissemination of information when
users are mobile performing independent random walks on a graph. To this end we
propose a simple model of infection that enables to study the coincidence time
of two random walkers on an arbitrary graph. By studying the coincidence time
of a susceptible and an infected individual both moving in the graph we obtain
estimates of the infection probability. The main result of this paper is to
pinpoint the impact of the network topology on the infection probability. More
precisely, we prove that for homogeneous graph including regular graphs and the
classical Erdos-Renyi model, the coincidence time is inversely proportional to
the number of nodes in the graph. We then study the model on power-law graphs,
that exhibit heterogeneous connectivity patterns, and show the existence of a
phase transition for the coincidence time depending on the parameter of the
power-law of the degree distribution.


title:
Dynamical Study of A1689 from Wide-Field VLT/VIMOS Spectroscopy: Mass
  Profile, Concentration Parameter, and Velocity Anisotropy

abstract:
  We examine the dynamics structure of the rich cluster A1689, combining
VLT/VIMOS spectroscopy with Subaru/Suprime-Cam imaging. The radial velocity
distribution of $\sim 500$ cluster members is bounded by a pair of clearly
defined velocity caustics, with a maximum amplitude of $\sim|4000|$ km/s at
$\simeq$ 300 h$^{-1}$ kpc, beyond which the amplitude steadily declines,
approaching zero velocity at a limiting radius of $\sim$ 2 h$^{-1}$ Mpc. We
derive the 3D velocity anisotropy and galaxy number density profiles using a
model-independent method to solve the Jeans equation, simultaneously
incorporating the observed velocity dispersion profile, the galaxy counts from
deep Subaru imaging, and our previously derived cluster mass profile from a
joint lensing and X-ray analysis. The velocity anisotropy is found to be
predominantly radial at large radius, becoming increasingly tangential towards
the center, in accord with expectations. We also analyze the galaxy data
independently of our previous analysis using two different methods: The first
is based on a solution of the Jeans equation assuming an NFW form for the mass
distribution, whereas in the second method the caustic amplitude is used to
determine the escape velocity. The cluster virial mass derived by both of these
dynamical methods is in good agreement with results from our earlier lensing
and X-ray analysis. We also confirm the high NFW concentration parameter, with
results from both methods combined to yield $c_{\rm vir}>13$ (1$\sigma$). The
inferred virial radius is consistent with the limiting radius where the
caustics approach zero velocity and where the counts of cluster members drop
off, suggesting that infall onto A1689 is currently not significant.


title:
GeV Emission from neutron-rich internal shocks of some long Gamma-ray
  Bursts

abstract:
  In the neutron-rich internal shocks model for gamma-ray bursts (GRBs), the
Lorentz factors (LFs) of ion shells are variable, and so are the LFs of
accompanying neutron shells. For slow neutron shells with a typical LF of
approximate tens, the typical $\beta$-decay radius is $\sim 10^{14}-10^{15}$
cm. As GRBs last long enough [$T_{90}>14(1+z)$ s], one earlier but slower
ejected neutron shell will be swept successively by later ejected ion shells in
the range $\sim10^{13}-10^{15}$ cm, where slow neutrons have decayed
significantly. Part of the thermal energy released in the interaction will be
given to the electrons. These accelerated electrons will be mainly cooled by
the prompt soft $\gamma-$rays and give rise to GeV emission. This kind of GeV
emission is particularly important for some very long GRBs and is detectable
for the upcoming satellite {\it Gamma-Ray Large Area Space Telescope} (GLAST).


title: Generating Series for Nested Bethe Vectors

abstract:
  We reformulate nested relations between off-shell
$U_q(\widehat{\mathfrak{gl}}_N)$ Bethe vectors as a certain equation on
generating series of strings of the composed $U_q(\widehat{\mathfrak{gl}}_N)$
currents. Using inversion of the generating series we find a new type of
hierarchical relations between universal off-shell Bethe vectors, useful for a
derivation of Bethe equation. As an example of application, we use these
relations for a derivation of analytical Bethe ansatz equations [Arnaudon D. et
al., Ann. Henri Poincar\'e 7 (2006), 1217-1268, math-ph/0512037] for the
parameters of universal Bethe vectors of the algebra
$U_q(\widehat{\mathfrak{gl}}_2)$.


title: Cluster structures from 2-Calabi-Yau categories with loops

abstract:
  We generalise the notion of cluster structures from the work of
Buan-Iyama-Reiten-Scott to include situations where the endomorphism rings of
the clusters may have loops. We show that in a Hom-finite 2-Calabi-Yau
category, the set of maximal rigid objects satisfies these axioms whenever
there are no 2-cycles in the quivers of their endomorphism rings.
  We apply this result to the cluster category of a tube, and show that this
category forms a good model for the combinatorics of a type B cluster algebra.


title: Double-critical graphs and complete minors

abstract:
  A connected $k$-chromatic graph $G$ is double-critical if for all edges $uv$
of $G$ the graph $G - u - v$ is $(k-2)$-colourable. The only known
double-critical $k$-chromatic graph is the complete $k$-graph $K_k$. The
conjecture that there are no other double-critical graphs is a special case of
a conjecture from 1966, due to Erd\H{o}s and Lov\'asz. The conjecture has been
verified for $k \leq 5$. We prove for $k=6$ and $k=7$ that any non-complete
double-critical $k$-chromatic graph is 6-connected and has $K_k$ as a minor.


title: Whether quantum mechanics can be almighty even in information science

abstract:
  We discuss that there is a crucial contradiction within quantum mechanics. We
derive a proposition concerning a quantum expectation value under the
assumption of the existence of the directions in a spin-1/2 system. The quantum
predictions within the formalism of von Neumann's projective measurement cannot
coexist with the proposition concerning the existence of the directions.
Therefore, we have to give up either the existence of the directions or the
formalism of von Neumann's projective measurement. Hence there is a crucial
contradiction within the Hilbert space formalism of the quantum theory. This
implies that there is no axiomatic system for the quantum theory. This also
reveals that we need new physical theories in order to explain the handing of
raw experimental data. We discuss that this crucial contradiction makes the
quantum-theoretical formulation of Deutsch's algorithm questionable.


title: Bethe Ansatz for the Universal Weight Function

abstract:
  We consider universal off-shell Bethe vectors given in terms of Drinfeld
realization of the algebra $U_q(\widehat{gl}_N)$
[arXiv:math/0610517,arXiv:0711.2819]. We investigate ordering properties of the
product of the transfer matrix and these vectors.
  We derive that these vectors are eigenvectors of the transfer matrix if their
Bethe parameters satisfy the universal Bethe equations [arXiv:math-ph/0512037].


title: On the Complexity of Core, Kernel, and Bargaining Set

abstract:
  Coalitional games are mathematical models suited to analyze scenarios where
players can collaborate by forming coalitions in order to obtain higher worths
than by acting in isolation. A fundamental problem for coalitional games is to
single out the most desirable outcomes in terms of appropriate notions of worth
distributions, which are usually called solution concepts. Motivated by the
fact that decisions taken by realistic players cannot involve unbounded
resources, recent computer science literature reconsidered the definition of
such concepts by advocating the relevance of assessing the amount of resources
needed for their computation in terms of their computational complexity. By
following this avenue of research, the paper provides a complete picture of the
complexity issues arising with three prominent solution concepts for
coalitional games with transferable utility, namely, the core, the kernel, and
the bargaining set, whenever the game worth-function is represented in some
reasonable compact form (otherwise, if the worths of all coalitions are
explicitly listed, the input sizes are so large that complexity problems
are---artificially---trivial). The starting investigation point is the setting
of graph games, about which various open questions were stated in the
literature. The paper gives an answer to these questions, and in addition
provides new insights on the setting, by characterizing the computational
complexity of the three concepts in some relevant generalizations and
specializations.


title: Prudent walks and polygons

abstract:
  We have produced extended series for two-dimensional prudent polygons, based
on a transfer matrix algorithm of complexity O$(n^5),$ for a series of length
$n.$ We have extended the definition to three dimensions and produced series
expansions for both prudent walks and polygons in three dimensions. For prudent
polygons in two dimensions we find the growth constant to be smaller than that
for the corresponding walks, and by considering three distinct classes of
polygons, we find that the growth constant for polygons varies with class,
while for walks it does not. We give the critical exponent for both walks and
polygons. In the three-dimensional case we estimate the growth constant for
both walks and polygons and also estimate the usual critical exponents
$\gamma,$ $\nu$ and $\alpha.$


title: Vector bundles on Fano threefolds of genus 7 and Brill-Noether loci

abstract:
  Given a smooth prime Fano threefold $X$ of genus 7 we consider its
homologically projectively dual curve $\Gamma$ and the natural integral functor
$\Phi^{!}:D^b(X) \to D^b(\Gamma)$. We prove that, for $d\geq 6$, $\Phi^{!}$
gives a birational map from a component of the moduli scheme $M_X(2,1,d)$ of
rank 2 stable sheaves on $X$ with $c_1=1$, $c_2=d$ to a generically smooth
$2d-9$-dimensional component of the Brill-Noether variety
$W^{2d-11}_{d-5,5d-24}$ of stable vector bundles on $\Gamma$ of rank $d-5$ and
degree $5d-24$ with at least $2d-10$ sections. This map turns out to be an
isomorphism for $d=6$, and the moduli space $M_X(2,1,6)$ is fine. For general
$X$, this moduli space is a smooth irreducible threefold.


title: CKM global fit and constraints on New Physics in the B meson mixing

abstract:
  An update profile of the CKM matrix is given, providing numerical and
graphical constraints on the CKM parameters in the Standard Model. Constraints
on additional parameters accounting for possible new physics contribution in a
model-independent analysis are also reported with emphasis on the leptonic
decay of the Bd and on the Bs mixing phase.


title:
No observational constraints from hypothetical collisions of
  hypothetical dark halo primordial black holes with galactic objects

abstract:
  It was suggested by several authors that hypothetical primordial black holes
(PBHs) may contribute to the dark matter in our Galaxy. There are strong
constraints based on the Hawking evaporation that practically exclude PBHs with
masses m~1e15-1e16g and smaller as significant contributors to the Galactic
dark matter. Similarly, PBHs with masses greater than about 1e26g are
practically excluded by the gravitational lensing observation. The mass range
between 10e16g<m<10e26g is unconstrained. In this paper, we examine possible
observational signatures in the unexplored mass range, investigating
hypothetical collisions of PBHs with main sequence stars, red giants, white
dwarfs, and neutron stars in our Galaxy. This has previously been discussed as
possibly leading to an observable photon eruption due to shock production
during the encounter. We find that such collisions are either too rare to be
observed (if the PBH masses are typically larger than about 1e20g), or produce
too little power to be detected (if the masses are smaller than about 1e20g).


title: The Quijote CMB Experiment

abstract:
  We present the current status of the QUIJOTE (Q-U-I JOint TEnerife) CMB
Experiment, a new instrument which will start operations early 2009 at Teide
Observatory, with the aim of characterizing the polarization of the CMB and
other processes of galactic and extragalactic emission in the frequency range
10-30 GHz and at large angular scales. QUIJOTE will be a valuable complement at
low frequencies for the PLANCK mission, and will have the required sensitivity
to detect a primordial gravitational-wave component if the tensor-to-scalar
ratio is larger than r=0.05.


title:
Angular Momentum Mixing in Single Flavor Color Superconductivity with
  Transverse Pairing

abstract:
  Because of the equal strength of the pairing potential mediated by one-gluon
exchange for all partial waves to the leading order QCD running coupling
constant and the nonlinearity of the gap equation, the non-spherical pairing in
single flavor color superconductivity(CSC) can not be restricted in a single
non-s-wave channel and the mixing among different angular momenta will occur.
In this paper, we examine the angular momentum mixing in single flavor CSC with
transverse pairing, in which the pairing quarks have opposite helicity. We find
that the free energy of all non-spherical pairing states are lowered by angular
momentum mixing compared with that contain p-wave only. But the amount of the
free energy drop is numerically small. Consequently the most stable pairing
state that respect the time reversal invariance remains the spherical CSL.


title:
A method to quantitatively evaluate Hamaker constant using the
  jump-into-contact effect in Atomic Force microscopy

abstract:
  We find that the jump-into-contact of the cantilever in the atomic force
microscope (AFM) is caused by an inherent instability in the motion of the AFM
cantilever. The analysis is based on a simple model of the cantilever moving in
a nonlinear force field. We show that the jump-into-contact distance can be
used to find the interaction of the cantilever tip with the surface. In the
specific context of the attractive van der Waals interaction, this method can
be realized as a new method of measuring the Hamaker constant for materials.
The Hamaker constant is determined from the deflection of the cantilever at the
jump-into-contact using the force constant of the cantilever and the tip radius
of curvature, all of which can be obtained by measurements. The results have
been verified experimentally on a sample of cleaved mica, a sample of Si wafer
with natural oxide and a silver film, using a number of cantilevers with
different spring constants. We emphasize that the method described here is
applicable only to surfaces that have van der Waals interaction as the
tip-sample interaction. We also find that the tip to sample separation at the
jump-into-contact is simply related to the cantilever deflection at this point,
and this provides a method to exactly locate the surface.


title: Vector Boson Fusion Higgs to Tau Tau Searches at the ATLAS Experiment

abstract:
  The search for a Higgs boson produced via Vector Boson Fusion and
subsequently decaying to two tau leptons is discussed. Significances for the
di-lepton and lepton-hadron decay channels are presented, and the fully
hadronic decay channel is shown to be feasible in terms of trigger, mass
reconstruction and signal efficiency. We consider performance issues for tau
ID, missing transverse energy, forward jet identification, and central jet and
b-jet vetoes, and outline several methods to estimate background contributions.


title:
Pseudoscalar meson decay constants f_K, f_D and f_Ds, from Nf=2 twisted
  mass Lattice QCD

abstract:
  We present the results of a lattice QCD calculation of the pseudoscalar meson
decay constants f_K, f_D and f_Ds, performed with N_f=2 dynamical fermions. The
simulation is carried out with the tree-level improved Symanzik gauge action
and with the twisted mass fermionic action at maximal twist. With respect to
our previous study (0709.4574 [hep-lat]), here we have analysed data at three
values of the lattice spacing (a=0.10 fm, 0.09 fm, 0.07 fm) and performed the
continuum limit, and we have included at a=0.09 fm data with a lighter quark
mass (m_pi = 260 MeV) and a larger volume (L = 2.7 fm), thus having at each
lattice spacing L >= 2.4 fm and m_pi*L >= 3.6. Our result for the kaon decay
constant is f_K=(157.5 +- 0.8|_{stat.} +- 3.3|_{syst.}) MeV and for the ratio
f_K/f_pi=1.205 +- 0.006|_{stat.} +- 0.025|_{syst.}, in good agreement with the
other N_f=2 and N_f=2+1 lattice calculations. For the D and D_s meson decay
constants we obtain f_D=(205 +- 7|_{stat.} +- 7|_{syst.}) MeV, in good
agreement with the CLEO-c experimental measurement and with other recent N_f=2
and N_f=2+1 lattice calculations, and f_{Ds}=(248 +- 3|_{stat.} +- 8|_{syst.})
MeV that, instead, is 2.3 sigma below the CLEO-c/BABAR experimental average,
confirming the present tension between lattice calculations and experimental
measurements.


title: Polyak-Viro formulas for coefficients of the Conway polynomial

abstract:
  We describe the Polyak-Viro arrow diagram formulas for the coefficients of
the Conway polynomial. As a consequence, we obtain the Conway polynomial as a
state sum over some subsets of the crossings of the knot diagram. It turns out
to be a simplification of a special case of Jaeger's state model for the HOMFLY
polynomial.


title: Torsion bounds for elliptic curves and Drinfeld modules

abstract:
  We derive asymptotically optimal upper bounds on the number of L-rational
torsion points on a given elliptic curve or Drinfeld module defined over a
finitely generated field K, as a function of the degree [L:K]. Our main tool is
the adelic openness of the image of Galois representations attached to elliptic
curves and Drinfeld modules, due to Serre and Pink-Ruetsche, respectively. Our
approach is to prove a general result for certain Galois modules, which applies
simultaneously to elliptic curves and to Drinfeld modules.


title:
Une classe d'espaces pr\'ehomog\`enes de type parabolique faiblement
  sph\'eriques

abstract:
  For absolutely simple, finite-dimensional Lie algebras g of rank at least 2,
defined over a local field of characteristic 0 and admitting a graduation:
g=g(-2)+g(-1)+g(0)+g(1)+g(2) given by an element H such that 2H is simple, we
construct parabolic subgroups P of the automorphism group of g which centralize
H, having geometric prehomogeneous action on g(1) and g(-1). We study the
structure of these prehomogeneous vector spaces. We prove that the Zeta
functions associated to the fundamental invariants for the P action on g(1) and
g(-1) have meromorphic extensions which satisfy functional equations. We give
the explicit calculus of the coefficients of these functional equations and the
Bernstein polynomials associated to these fundamental invariants in the
archimedian case, by reducing the problem to a similar problem for centralizers
of pair of commuting sl(2) Lie algebras. This work is a generalization of
well-known results when g(2)=0.


title: Infrared cut-off proposal for the Holographic density

abstract:
  We propose an infrared cut-off for the holographic the dark-energy, which
besides the square of the Hubble scale also contains the time derivative of the
Hubble scale. This avoids the problem of causality which appears using the
event horizon area as the cut-off, and solves the coincidence problem.


title: Semidefinite Programming for Min-Max Problems and Games

abstract:
  We introduce two min-max problems: the first problem is to minimize the
supremum of finitely many rational functions over a compact basic
semi-algebraic set whereas the second problem is a 2-player zero-sum polynomial
game in randomized strategies and with compact basic semi-algebraic pure
strategy sets. It is proved that their optimal solution can be approximated by
solving a hierarchy of semidefinite relaxations, in the spirit of the moment
approach developed in Lasserre. This provides a unified approach and a class of
algorithms to approximate all Nash equilibria and min-max strategies of many
static and dynamic games. Each semidefinite relaxation can be solved in time
which is polynomial in its input size and practice from global optimization
suggests that very often few relaxations are needed for a good approximation
(and sometimes even finite convergence).


title: Uniform growth of groups acting on Cartan-Hadamard spaces

abstract:
  Let $X$ be an $n$-dimensional simply connected manifold of pinched sectional
curvature $-a^2 \leq K \leq -1$. There exist a positive constant $C(n,a)$ such
that for any finitely generated discrete group $\Gamma$ acting on $X$, then
either $\Gamma$ is virtually nilpotent or the algebraic entropy $Ent (\Gamma)
\geq C(n,a)$.


title:
Combination of Bloch oscillations with a Ramsey-Bord\'e interferometer :
  new determination of the fine structure constant

abstract:
  We report a new experimental scheme which combines atom interferometry with
Bloch oscillations to provide a new measurement of the ratio
$h/m_{\mathrm{Rb}}$. By using Bloch oscillations, we impart to the atoms up to
1600 recoil momenta and thus we improve the accuracy on the recoil velocity
measurement. The deduced value of $h/m_{\mathrm{Rb}}$ leads to a new
determination of the fine structure constant $\alpha^{-1}=137.035 999 45 (62)$
with a relative uncertainty of $4.6\times 10^{-9}$. The comparison of this
result with the value deduced from the measurement of the electron anomaly
provides the most stringent test of QED.


title: Optimal Percolation of Disordered Segregated Composites

abstract:
  We evaluate the percolation threshold values for a realistic model of
continuum segregated systems, where random spherical inclusions forbid the
percolating objects, modellized by hard-core spherical particles surrounded by
penetrable shells, to occupy large regions inside the composite. We find that
the percolation threshold is generally a non-monotonous function of
segregation, and that an optimal (i. e., minimum) critical concentration exists
well before maximum segregation is reached. We interpret this feature as
originating from a competition between reduced available volume effects and
enhanced concentrations needed to ensure percolation in the highly segregated
regime. The relevance with existing segregated materials is discussed.


title: Chaotic iterations and topological chaos

abstract:
  Chaotic iterations have been introduced on the one hand by Chazan, Miranker
[5] and Miellou [9] in a numerical analysis context, and on the other hand by
Robert [11] and Pellegrin [10] in the discrete dynamical systems framework. In
both cases, the objective was to derive conditions of convergence of such
iterations to a fixed state. In this paper, a new point of view is presented,
the goal here is to derive conditions under which chaotic iterations admit a
chaotic behaviour in a rigorous mathematical sense. Contrary to what has been
studied in the literature, convergence is not desired.
  More precisely, we establish in this paper a link between the concept of
chaotic iterations on a finite set and the notion of topological chaos [8],
[6], [7]. We are motivated by concrete applications of our approach, such as
the use of chaotic boolean iterations in the computer security field. Indeed,
the concept of chaos is used in many areas of data security without real
rigorous theoretical foundations, and without using the fundamental properties
that allow chaos.
  The wish of this paper is to bring a bit more mathematical rigour in this
field.


title:
Microsecond Time Resolution Optical Photometry using a H.E.S.S.
  Cherenkov Telescope

abstract:
  We have constructed an optical photometer with microsecond time resolution,
which is currently being operated on one of the H.E.S.S. telescopes. H.E.S.S.
is an array of four Cherenkov telescopes, each with a 107 m^2 mirror, located
in the Khomas highland in Namibia. In its normal mode of operation H.E.S.S.
observes Cherenkov light from air showers generated by very high energy
gamma-rays in the upper atmosphere. Our detector consists of seven
photomultipliers, one in the center to record the lightcurve from the target
and six concentric photomultipliers as a veto system to reject disturbing
signals e.g. from meteorites or lightning at the horizon. The data acquisition
system has been designed to continuously record the signals with zero deadtime.
The Crab pulsar has been observed to verify the performance of the instrument
and the GPS timing system. Compact galactic targets were observed to search for
flares on timescales of a few microseconds to ~ 100 milliseconds. The design
and sensitivity of the instrument as well as the data analysis method are
presented.


title:
Variational Average-Atom in Quantum Plasmas (VAAQP) - first numerical
  results

abstract:
  The work on a new fully variational model of average-atom in quantum plasmas
using a numerical code called VAAQP is reported. A brief description of the
code is given. Application to aluminium at solid density and temperatures
between 0.05 and 12 eV is presented. Comparisons to results obtained using
other approaches are also shown and discussed. The results prove the
feasibility of the variational model in the warm dense matter regime. Effects
of the variational treatment can lead in this region to significant differences
with respect to existing models.


title: Structure of 55Ti from relativistic one-neutron knockout

abstract:
  Results are presented from a one-neutron knockout reaction at relativistic
energies on 56Ti using the GSI FRS as a two-stage magnetic spectrometer and the
Miniball array for gamma-ray detection. Inclusive and exclusive longitudinal
momentum distributions and cross-sections were measured enabling the
determination of the orbital angular momentum of the populated states.
First-time observation of the 955(6) keV nu p3/2-hole state in 55Ti is
reported. The measured data for the first time proves that the ground state of
55Ti is a 1/2- state, in agreement with shell-model calculations using the
GXPF1A interaction that predict a sizable N=34 gap in 54Ca.


title:
Spectral energy distribution modelling of Southern candidate massive
  protostars using the Bayesian inference method

abstract:
  Concatenating data from the millimetre regime to the infrared, we have
performed spectral energy distribution modelling for 227 of the 405 millimetre
continuum sources of Hill et al. (2005) which are thought to contain young
massive stars in the earliest stages of their formation. Three main parameters
are extracted from the fits: temperature, mass and luminosity. The method
employed was Bayesian inference, which allows a statistically probable range of
suitable values for each parameter to be drawn for each individual protostellar
candidate. This is the first application of this method to massive star
formation.
  The cumulative distribution plots of the SED modelled parameters in this work
indicate that collectively, the sources without methanol maser and/or radio
continuum associations (MM-only cores) display similar characteristics to those
of high mass star formation regions. Attributing significance to the marginal
distinctions between the MM-only cores and the high-mass star formation sample
we draw hypotheses regarding the nature of the MM-only cores, including the
possibility that the population itself is comprised of different types of
source, and discuss their role in the formation scenarios of massive star
formation. In addition, we discuss the usefulness and limitations of SED
modelling and its application to the field. From this work, it is clear that
within the valid parameter ranges, SEDs utilising current far-infrared data can
not be used to determine the evolution of massive protostars or massive young
stellar objects.


title: Some remarks on defects and T-duality

abstract:
  The equations of motion for a conformal field theory in the presence of
defect lines can be derived from an action that includes contributions from
bibranes. For T-dual toroidal compactifications, they imply a direct relation
between Poincare line bundles and the action of T-duality on boundary
conditions. We also exhibit a class of diagonal defects that induce a shift of
the B-field. We finally study T-dualities for S^1-fibrations in the example of
the Wess-Zumino-Witten model on SU(2) and lens spaces. Using standard
techniques from D-branes, we derive from algebraic data in rational conformal
field theories geometric structures familiar from Fourier-Mukai
transformations.


title:
The timescale for giant planet formation : constraints from the
  rotational evolution of exoplanet host stars

abstract:
  The timescale over which planets may form in the circumstellar disks of young
stars is one of the main issues of current planetary formation models. We
present here new constraints on planet formation timescales derived from the
rotational evolution of exoplanet host stars.


title: Early Top Physics at CMS Experiment

abstract:
  The top quark was discovered at the Tevatron in 1995. For the last decade the
study of its properties has been a major theme in the worldwide experimental
high energy physics program. The advent of the LHC opens up a new era in top
quark physics; because of the large $t\bar{t}$ cross-section and the high
luminosity, the LHC can be thought of as a top factory. Here we present the
prospects and plans for ttbar physics at CMS at an early stage of the
experiment, covering from the initial establishment of the top signal, to the
first measurements that become possible for an integrated luminosity of 100
$pb^{-1}$, considering a realistic detector performance.


title:
Clone Theory: Its Syntax and Semantics, Applications to Universal
  Algebra, Lambda Calculus and Algebraic Logic

abstract:
  The primary goal of this paper is to present a unified way to transform the
syntax of a logic system into certain initial algebraic structure so that it
can be studied algebraically. The algebraic structures which one may choose for
this purpose are various clones over a full subcategory of a category. We show
that the syntax of equational logic, lambda calculus and first order logic can
be represented as clones or right algebras of clones over the set of positive
integers. The semantics is then represented by structures derived from left
algebras of these clones.


title:
Reduced Kronecker coefficients and counter-examples to Mulmuley's strong
  saturation conjecture SH

abstract:
  We provide counter-examples to Mulmuley's strong saturation conjecture
(strong SH) for the Kronecker coefficients. This conjecture was proposed in the
setting of Geometric Complexity Theory to show that deciding whether or not a
Kronecker coefficient is zero can be done in polynomial time. We also provide a
short proof of the #P-hardness of computing the Kronecker coefficients. Both
results rely on the connections between the Kronecker coefficients and another
family of structural constants in the representation theory of the symmetric
groups: Murnaghan's reduced Kronecker coefficients.
  An appendix by Mulmuley introduces a relaxed form of the saturation
hypothesis SH, still strong enough for the aims of Geometric Complexity Theory.


title: Linear Dynamical Systems over Finite Rings

abstract:
  The problem of linking the structure of a finite linear dynamical system with
its dynamics is well understood when the phase space is a vector space over a
finite field. The cycle structure of such a system can be described by the
elementary divisors of the linear function, and the problem of determining
whether the system is a fixed point system can be answered by computing and
factoring the system's characteristic polynomial and minimal polynomial. It has
become clear recently that the study of finite linear dynamical systems must be
extended to embrace finite rings. The difficulty of dealing with an arbitrary
finite commutative ring is that it lacks of unique factorization. In this
paper, an efficient algorithm is provided for analyzing the cycle structure of
a linear dynamical system over a finite commutative ring. In particular, for a
given commutative ring $R$ such that $|R|=q$, where $q$ is a positive integer,
the algorithm determines whether a given linear system over $R^n$ is a fixed
point system or not in time $O(n^3\log(n\log(q)))$.


title: Non-minimal coupling in inflation and inflating with the Higgs boson

abstract:
  We analyse the effect of the non-minimal coupling of the form $\xi\phi^2R/2$
on the single field inflation. If the non-minimal coupling is large, it relaxes
the constraint on the field self coupling, making it possible to use the
Standard Model Higgs field as the inflaton. At the same time, even small
non-minimal coupling constant, $\xi\gtrsim10^{-3}$, brings the usual inflaton
with quartic potential in agreement with the WMAP5 observations.


title:
Non-perturbative quark mass dependence in the heavy-light sector of
  two-flavour QCD

abstract:
  We present preliminary results of the non-perturbative heavy quark mass
dependence of heavy-light meson observables in the continuum limit of
finite-volume two-flavour lattice QCD. These observables, which are derived
from heavy-light Schroedinger functional correlation functions and computed
over a range of renormalization group invariant heavy quark masses from the
charm to beyond the bottom region, allow for a quantitative comparison with the
predictions of HQET and are of practical relevance for solving renormalization
problems in HQET non-perturbatively by a matching to QCD in finite volume.


title: CP violation in B decays to charm and charmonium at Belle

abstract:
  We present the study of CP violation in charm and charmonium decays, using a
data sample corresponding to 657 \times 10^6 BBbar events collected with the
Belle detector at the \Upsilon(4S) resonance at the KEKB asymmetric-energy
e^+e^- collider. We report measurements of the polarization fraction and
time-dependent CP-violation parameters of the decay B^0\to D^{*+}D^{*-} and of
the branching fraction and charge asymmetry in the decay of the Cabibbo- and
color-suppressed process B^{\pm} \to \psi(2S) \pi^{\pm}.


title: Rings without a Gorenstein analogue of the Govorov-Lazard Theorem

abstract:
  It was proved by Beligiannis and Krause that over certain Artin algebras,
there are Gorenstein flat modules which are not direct limits of finitely
generated Gorenstein projective modules. That is, these algebras have no
Gorenstein analogue of the Govorov-Lazard Theorem.
  We show that, in fact, there is a large class of rings without such an
analogue. Namely, let R be a commutative local noetherian ring. Then the
analogue fails for R if it has a dualizing complex, is henselian, not
Gorenstein, and has a finitely generated Gorenstein projective module which is
not free.
  The proof is based on a theory of Gorenstein projective (pre)envelopes. We
show, among other things, that the finitely generated Gorenstein projective
modules form an enveloping class in mod R if and only if R is Gorenstein or has
the property that each finitely generated Gorenstein projective module is free.
  This is analogous to a recent result on covers by Christensen, Piepmeyer,
Striuli, and Takahashi, and their methods are an important input to our work.


title: The SuperNEMO Experiment

abstract:
  The observation of neutrino oscillations has proven that neutrinos have mass.
This is direct evidence of physics beyond the Standard Model. This discovery
has renewed interest in neutrinoless double beta decay ($0\nu\beta\beta$)
experiments which provide the only practical way to determine whether neutrinos
are Majorana or Dirac particles. Such experiments also have the potential to
determine the absolute scale of the neutrino mass and help resolve the neutrino
mass hierarchy question. The NEMO-3 (Neutrino Ettore Majorana Observatory) is
currently one of the most sensitive searches for neutrinoless double beta
decay. The main goal of SuperNEMO is to extend the sensitivity of the NEMO-3
search for neutrinoless double beta decay (and to measure two-neutrino double
beta $2\nu\beta\beta$ decay). The two isotopes under consideration for
SuperNEMO are $^{82}$Se and $^{150}$Nd. The target sensitivity is a
$0\nu\beta\beta$ decay half-life at the level of $10^{26}$ years which will
explore the degenerate neutrino mass hierarchy down to 50 meV.


title: Relativistic dynamics without collisions and conservation laws

abstract:
  We show that the relativistic expressions for momentum and energy as well as
the way in which they transform could be derived without involving collisions
and conservation laws. Our approach involves relativistic kinematics via the
addition law of relativistic velocities.


title: New QCD Results from the H1 Experiment at HERA

abstract:
  New QCD results obtained by the H1 Collaboration are summarized. These
results are based on data taken in $e^{\pm}p$ collisions at HERA I (1994-2002)
and HERA II (2003-2007) corresponding to an integrated luminosity of almost
$\rm 0.5 fb^{-1}$. The data were taken at an electron {Electron means electron
and positron.} beam energy of $E_{e}=27.5$ GeV and proton beam energies of $\rm
E_{p}=820 GeV, 920 GeV, 575 GeV$ and $\rm 460 GeV$. A direct measurement of
$F_{L}$, jet production and measurement of $\alpha_{s}$, production of heavy
quarks and diffractive photo-production of jets are presented.


title: The minimum length problem of loop quantum cosmology

abstract:
  The appearance of the big bounce (BB) in the evolution of the universe is
analyzed in the setting of loop quantum cosmology (LQC). Making use of an idea
of a minimum length turns classical Big Bang into BB. We argue why the spectrum
of the kinematical area operator of loop quantum gravity cannot be used for the
determination of this length. We find that the fundamental length, at the
present stage of development of LQC, is a free parameter of this model.


title: Exponential random graphs as models of overlay networks

abstract:
  In this paper, we give an analytic solution for graphs with n nodes and E
edges for which the probability of obtaining a given graph G is specified in
terms of the degree sequence of G. We describe how this model naturally appears
in the context of load balancing in communication networks, namely Peer-to-Peer
overlays. We then analyse the degree distribution of such graphs and show that
the degrees are concentrated around their mean value. Finally, we derive
asymptotic results on the number of edges crossing a graph cut and use these
results $(i)$ to compute the graph expansion and conductance, and $(ii)$ to
analyse the graph resilience to random failures.


title: Alignment of the ATLAS Inner Detector Tracking System

abstract:
  The ATLAS detector at CERN's Large Hadron Collider (LHC) is equipped with a
tracking system at its core (the Inner Detector, ID) consisting of silicon and
gaseous straw tube detectors. The physics performance of the ID requires a
precision alignment; a challenge involving complex algorithms and significant
computing power. The alignment algorithms were already validated on: Combined
Test Beam data, Cosmic Ray runs and simulated physics events. The alignment
chain was tested on a daily basis in exercises that mimicked ATLAS data taking
operations. ID commissioning after final installation into the ATLAS detector
has yielded thousands of reconstructed cosmic ray tracks, which have been used
for an initial alignment of the ID before the LHC start-up. A hardware system
using Frequency Scanning Interferometry will be used to monitor structural
deformations. Given the programme outlined here, the ATLAS Inner Detector has
had a solid preparation for LHC collisions.


title: OscSNS: Precision Neutrino Measurements at the Spallation Neutron Source

abstract:
  The Spallation Neutron Source (SNS), located at Oak Ridge Laboratory in the
United States, will be coming online over the next few years. In addition to
producing fluxes of high-intensity neutrons, the interaction of the proton beam
with the liquid mercury target produces copious pions. The pi+ and subsequent
mu+ decay at rest, providing a neutrino beam comprising numu, nue, and
anti-numu components. This neutrino beam is ideal for high-precision neutrino
experiments. OscSNS is a proposed multi-purpose experiment that will perform a
search for light sterile neutrinos, search for beyond the Standard Model
interactions using neutrino oscillations, and provide tests of Standard Model
predictions through world-record precision neutrino cross section measurements.
OscSNS plans to submit a full proposal for funding in 2009.


title:
Optimal Switching of One-Dimensional Reflected BSDEs, and Associated
  Multi-Dimensional BSDEs with Oblique Reflection

abstract:
  In this paper, an optimal switching problem is proposed for one-dimensional
reflected backward stochastic differential equations (RBSDEs, for short) where
the generators, the terminal values and the barriers are all switched with
positive costs. The value process is characterized by a system of
multi-dimensional RBSDEs with oblique reflection, whose existence and
uniqueness are by no means trivial and are therefore carefully examined.
Existence is shown using both methods of the Picard iteration and penalization,
but under some different conditions. Uniqueness is proved by representation
either as the value process to our optimal switching problem for
one-dimensional RBSDEs, or as the equilibrium value process to a stochastic
differential game of switching and stopping. Finally, the switched RBSDE is
interpreted as a real option.


title: Inferring sparse Gaussian graphical models with latent structure

abstract:
  Our concern is selecting the concentration matrix's nonzero coefficients for
a sparse Gaussian graphical model in a high-dimensional setting. This
corresponds to estimating the graph of conditional dependencies between the
variables. We describe a novel framework taking into account a latent structure
on the concentration matrix. This latent structure is used to drive a penalty
matrix and thus to recover a graphical model with a constrained topology. Our
method uses an $\ell_1$ penalized likelihood criterion. Inference of the graph
of conditional dependencies between the variates and of the hidden variables is
performed simultaneously in an iterative \textsc{em}-like algorithm. The
performances of our method is illustrated on synthetic as well as real data,
the latter concerning breast cancer.


title: Constraining the polarized gluon PDF in pp collisions at RHIC

abstract:
  The main focus of the physics program at PHENIX and STAR that makes use of
RHIC's polarized proton beams is to figure out how and if at all the gluons
inside protons are polarized, or to put it another way, do the spin 1 gluons
prefer to have their spins aligned or anti-aligned with the spin of the proton,
or do they just not care? This question is an important part of the more
general question of how the constituents of protons, gluons and quarks,
conspire to make up the overall spin 1/2 of the proton. Measurements of, e.g,
jet and hadron, production cross-section differences between the two cases
where the two polarized protons colliding have their spins aligned and
anti-aligned are sensitive to the gluon polarization, which is encoded in the
spin--dependent parton distribution function (PDF) for gluons, Delta-g(x).


title: The Enlightened Game of Life

abstract:
  We investigate a special class of cellular automata (CA) evolving in a
environment filled by an electromagnetic wave. The rules of the Conway's Game
of Life are modified to account for the ability to retrieve life-sustenance
from the field energy. Light-induced self-structuring and self-healing
abilities and various dynamic phases are displayed by the CA. Photo-driven
genetic selection and the nonlinear feedback of the CA on the electromagnetic
field are included in the model, and there are evidences of self-organized
light-localization processes. The evolution of the electromagnetic field is
based on the Finite Difference Time Domain (FDTD) approach. Applications are
envisaged in evolutionary biology, artificial life, DNA replication, swarming,
optical tweezing and field-driven soft-matter.


title: Induced Chern-Simons-like action in Lorentz-violating massless QED

abstract:
  In the present work, we study different aspects of Lorentz and CPT symmetry
violation in extended massless QED. By following the observation that the 2+1
dimensional Maxwell-Chern-Simons theory can be originated from the 3+1
dimensional Chern-Simons-like action, we also focus on the fermion sector to
relate the 3+1 dimensional extended massless QED to 2+1 dimensional massive
QED. We take advantage of this to state that the Chern-Simons-like action in
extended massless QED can be induced with its coefficient being well defined
and finite just as its 2+1 counterpart. We make use of three different
regularization schemes by inducting the Chern-Simons-like in 3+1 dimensions to
support this conjecture.


title: TWIST: Precision Measurement of the Muon Decay Parameters

abstract:
  The TWIST experiment has made a precision measurement of three of the decay
parameters in muon decay. The newest results are rho = 0.75014 +-0.00017(stat)
+-0.00044(sys) +-0.00011(eta) and delta = 0.75067 +-0.00030(stat)
+-0.00067(sys). Together with previously published results, improved
constraints on possible extensions of the electroweak Standard Model are
derived.


title: Optimal Strategies in Sequential Bidding

abstract:
  We are interested in mechanisms that maximize social welfare. In [1] this
problem was studied for multi-unit auctions with unit demand bidders and for
the public project problem, and in each case social welfare undominated
mechanisms in the class of feasible and incentive compatible mechanisms were
identified. One way to improve upon these optimality results is by allowing the
players to move sequentially. With this in mind, we study here sequential
versions of two feasible Groves mechanisms used for single item auctions: the
Vickrey auction and the Bailey-Cavallo mechanism. Because of the absence of
dominant strategies in this sequential setting, we focus on a weaker concept of
an optimal strategy. For each mechanism we introduce natural optimal strategies
and observe that in each mechanism these strategies exhibit different
behaviour. However, we then show that among all optimal strategies, the one we
introduce for each mechanism maximizes the social welfare when each player
follows it. The resulting social welfare can be larger than the one obtained in
the simultaneous setting. Finally, we show that, when interpreting both
mechanisms as simultaneous ones, the vectors of the proposed strategies form a
Pareto optimal Nash equilibrium in the class of optimal strategies.


title: DDO spectroscopic survey of MOST variable stars

abstract:
  A spectroscopic support survey of 103 objects observed by the MOST satellite
is presented; 96 are variable stars with 83 of them being new MOST
variable-star detections or stars with variability types verified and/or
modified on the basis of the MOST data. Analysis of 241 medium-resolution
spectra using the broadening-functions formalism yielded radial velocities,
projected rotational velocities (for 31 targets for which it was possible) and
spectral type estimates. Seven new spectroscopic binaries were discovered;
orbital solutions are given for two of them (HD73709, and GSC 0814-0323). The
visual binary HD46180 was found to be composed of two close binary stars
(eclipsing and non-eclipsing one) very probably forming a physical quadruple
system.


title: ATLAS Detector Status and Physics Startup Plans

abstract:
  The status of the ATLAS detector shortly before the start-up of the LHC is
presented. The progress in the commissioning of the detector, as well as plans
for early physics analysis are outlined.


title:
Comparing different freeze-out scenarios in azimuthal hadron
  correlations induced by fast partons

abstract:
  I review the linearized hydrodynamical treatment of a fast parton traversing
a perturbative quark-gluon plasma. Using numerical solutions for the medium's
response to the fast parton, I obtain the medium's distribution function which
is then used in a Cooper-Frye freeze-out prescription to obtain an azimuthal
particle spectrum. Two different freeze-out scenarios are considered which
yield significantly different results. I conclude that any meaningful
comparison of azimuthal hadron correlation functions to RHIC data requires
implementing a realistic freeze-out scenario in an expanding medium.


title:
Vortex-glass phase transition and superconductivity in an under- doped
  (Ba,K)Fe2As2 single crystal

abstract:
  Measurements of magnetotransport and current-voltage (I-V) characteristics up
to 9 T were used to investigate the vortex phase diagram of an under-doped
Measurements of magnetotransport and current-voltage (I-V) characteristics up
to 9 T were used to investigate the vortex phase diagram of an under-doped
(Ba,K)Fe2As2 single crystal with Tc=26.2 K. It is found that the anisotropy
ratio of the upper critical field Hc2 decreases from 4 to 2.8 with decreasing
temperature from Tc to 24.8 K. Consistent with the vortex-glass theory, the I-V
curves measured at H=9 T can be well scaled with the vortex-glass transition
temperature of Tg=20.7 K and critical exponents z=4.1 and v=1. Analyses in
different magnetic fields produced almost identical critical exponent values,
with some variation in Tg, corroborating the existence of the vortex-glass
transition in this under-doped (Ba,K)Fe2As2 single crystal up to 9 T. A vortex
phase diagram is presented, based on the evolution of Tg and Hc2 with magnetic
field.


title:
A 160-320 GeV linear collider to study e+e- -> HZ and gamma-gamma -> H,
  HH

abstract:
  The construction of two electron linacs and an optical FEL system is
proposed. This facility, which would serve primarily as a Higgs-boson collider
factory, could be built in two stages, each with distinct physics objectives
requiring particular center-of-mass (CM) energies: (1) e+e- -> HZ (E_ee ~ 250
GeV), and (2) gamma-gamma -> H, HH (E_ee ~ 160 to 320 GeV). The rich set of
final states in e+e- and gamma-gamma collisions would play an essential role in
measuring the mass, spin, parity, two-photon width and trilinear self-coupling
of the Higgs boson, as well as its couplings to fermions and gauge bosons;
these quantities are difficult to determine with only one initial state. All
the measurements made at LEP and SLC could be repeated using highly polarized
electron beams and at much higher luminosities. For some processes within and
beyond the Standard Model, the required CM energy is considerably lower at the
proposed facility than at an e+e- or proton collider.


title: Quantum geometry of the Cartan control problem

abstract:
  The Cartan control problem of the quantum circuits discussed from the
differential geometry point of view. Abstract unitary transformations of
$SU(2^n)$ are realized physically in the projective Hilbert state space
$CP(2^n-1)$ of the n-qubit system. Therefore the Cartan decomposition of the
algebra $AlgSU(2^n-1)$ into orthogonal subspaces $h$ and $b$ such that $[h,h]
\subseteq h, [b,b] \subseteq h, [b,h] \subseteq b$ is state-dependent and thus
requires the representation in the local coordinates.


title: Numerical Measures for Two-Graphs

abstract:
  We study characteristics which might distinguish two-graphs by introducing
different numerical measures on the collection of graphs on $n$ vertices. Two
conjectures are stated, one using these numerical measures and the other using
the deck of a graph, which suggest that there is a finite set of conditions
differentiating two-graphs. We verify that, among the four non-trivial
non-isomorphic regular two-graphs on 26 vertices, both conjectures hold.


title: The Spatial Evolution of Stellar Structures in the LMC

abstract:
  We present an analysis of the spatial distribution of various stellar
populations within the Large Magellanic Cloud. We combine mid-infrared selected
young stellar objects, optically selected samples with mean ages between ~9 and
~1000 Myr, and existing stellar cluster catalogues to investigate how stellar
structures form and evolve within the LMC. For the analysis we use Fractured
Minimum Spanning Trees, the statistical Q parameter, and the two-point
correlation function. Restricting our analysis to young massive (OB) stars we
confirm our results obtained for M33, namely that the luminosity function of
the groups is well described by a power-law with index -2, and that there is no
characteristic length-scale of star-forming regions. We find that stars in the
LMC are born with a large amount of substructure, consistent with a 2D fractal
distribution with dimension ~1.8 and evolve towards a uniform distribution on a
timescale of ~175 Myr. This is comparable to the crossing time of the galaxy
and we suggest that stellar structure, regardless of spatial scale, will be
eliminated in a crossing time. This may explain the smooth distribution of
stars in massive/dense young clusters in the Galaxy, while other, less massive,
clusters still display large amounts of structure at similar ages. By comparing
the stellar and star cluster distributions and evolving timescales, we show
that infant mortality of clusters (or 'popping clusters') have a negligible
influence on galactic structure. Finally, we quantify the influence of the
elongation, differential extinction, and contamination of a population on the
measured Q value.


title: Fluidization of granular media wetted by liquid $^4$He

abstract:
  We explore experimentally the fluidization of vertically agitated PMMA
spheres wetted by liquid $^4$He. By controlling the temperature around the
$\lambda$ point we change the properties of the wetting liquid from a normal
fluid (helium I) to a superfluid (helium II). For wetting by helium I, the
critical acceleration for fluidization ($\Gamma_c$) shows a steep increase
close to the saturation of the vapor pressure in the sample cell. For helium II
wetting, $\Gamma_c$ starts to increase at about 75% saturation, indicating that
capillary bridges are enhanced by the superflow of unsaturated helium film.
Above saturation, $\Gamma_c$ enters a plateau regime where the capillary force
between particles is independent of the bridge volume. The plateau value is
found to vary with temperature and shows a peak at 2.1 K, which we attribute to
the influence of the specific heat of liquid helium.


title:
Standing on the shoulders of giants: Trojan Earths and vortex trapping
  in low mass self-gravitating protoplanetary disks of gas and solids

abstract:
  Centimeter and meter sized solid particles in protoplanetary disks are
trapped within long lived high pressure regions, creating opportunities for
collapse into planetesimals and planetary embryos. We study the accumulations
in the stable Lagrangian points of a giant planet, as well as in the Rossby
vortices launched at the edges of the gap it carves. We employ the Pencil Code,
tracing the solids with a large number of interacting Lagrangian particles,
usually 100,000. For particles of 1 cm to 10 cm radii, gravitational collapse
occurs in the Lagrangian points in less than 200 orbits. For 5 cm particles, a
2 Earth mass planet is formed. For 10 cm, the final maximum collapsed mass is
around 3 Earth masses. The collapse of the 1 cm particles is indirect,
following the timescale of depletion of gas from the tadpole orbits. In the
edges of the gap vortices are excited, trapping preferentially particles of 30
cm radii. The rocky planet that is formed is as massive as 17 Earth masses,
constituting a Super-Earth. By using multiple particle species, we find that
gas drag modifies the streamlines in the tadpole region around the classical L4
and L5 points. As a result, particles of different radii have their stable
points shifted to different locations. Collapse therefore takes longer and
produces planets of lower mass. Three super-Earths are formed in the vortices,
the most massive having 4.4 Earth masses. We conclude that a Jupiter mass
planet can induce the formation of other planetary embryos in the outer edge of
its gas gap. Trojan Earth mass planets are readily formed, and although not
existing in the solar system, might be common in the exoplanetary zoo.