id stringlengths 9 16 | title stringlengths 1 382 | abstract stringlengths 6 6.09k | categories stringlengths 5 125 |
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0704.0301 | Differential Recursion and Differentially Algebraic Functions | Moore introduced a class of real-valued "recursive" functions by analogy with
Kleene's formulation of the standard recursive functions. While his concise
definition inspired a new line of research on analog computation, it contains
some technical inaccuracies. Focusing on his "primitive recursive" functions,
we pin d... | cs.CC |
0704.0302 | Spline Single-Index Prediction Model | For the past two decades, single-index model, a special case of projection
pursuit regression, has proven to be an efficient way of coping with the high
dimensional problem in nonparametric regression. In this paper, based on weakly
dependent sample, we investigate the single-index prediction (SIP) model which
is rob... | math.ST stat.TH |
0704.0303 | Measurement of the Aerosol Phase Function at the Pierre Auger
Observatory | Air fluorescence detectors measure the energy of ultra-high energy cosmic
rays by collecting fluorescence light emitted from nitrogen molecules along the
extensive air shower cascade. To ensure a reliable energy determination, the
light signal needs to be corrected for atmospheric effects, which not only
attenuate th... | astro-ph physics.ao-ph |
0704.0304 | The World as Evolving Information | This paper discusses the benefits of describing the world as information,
especially in the study of the evolution of life and cognition. Traditional
studies encounter problems because it is difficult to describe life and
cognition in terms of matter and energy, since their laws are valid only at the
physical scale. ... | cs.IT cs.AI math.IT q-bio.PE |
0704.0305 | Polymerization Force Driven Buckling of Microtubule Bundles Determines
the Wavelength of Patterns Formed in Tubulin Solutions | We present a model for the spontaneous formation of a striated pattern in
polymerizing microtubule solutions. It describes the buckling of a single
microtubule (MT) bundle within an elastic network formed by other similarly
aligned and buckling bundles and unaligned MTs. Phase contrast and polarization
microscopy stu... | physics.bio-ph |
0704.0306 | Neutron Inelastic Scattering Processes as Background for Double-Beta
Decay Experiments | We investigate several Pb$(n,n'\gamma$) and Ge$(n,n'\gamma$) reactions. We
measure $\gamma$-ray production from Pb$(n,n'\gamma$) reactions that can be a
significant background for double-beta decay experiments which use lead as a
massive inner shield. Particularly worrisome for Ge-based double-beta decay
experiments ... | nucl-ex hep-ex |
0704.0307 | Periodic accretion from a circumbinary disk in the young binary UZ Tau E | Close pre-main-sequence binary stars are expected to clear central holes in
their protoplanetary disks, but the extent to which material can flow from the
circumbinary disk across the gap onto the individual circumstellar disks has
been unclear. In binaries with eccentric orbits, periodic perturbation of the
outer di... | astro-ph |
0704.0308 | Effect of node deleting on network structure | The ever-increasing knowledge of the structure of various real-world networks
has uncovered their complex multi-mechanism-governed evolution processes.
Therefore, a better understanding of the structure and evolution of these
networked complex systems requires us to describe such processes in a more
detailed and real... | physics.soc-ph |
0704.0309 | The Complexity of HCP in Digraps with Degree Bound Two | The Hamiltonian cycle problem (HCP) in digraphs D with degree bound two is
solved by two mappings in this paper. The first bijection is between an
incidence matrix C_{nm} of simple digraph and an incidence matrix F of balanced
bipartite undirected graph G; The second mapping is from a perfect matching of
G to a cycle... | cs.CC cs.DM |
0704.0310 | VLBI observations of nineteen GHz-Peaked-Spectrum radio sources at 1.6
GHz | Aims and Methods: We present the results of VLBI observations of nineteen
GHz-Peaked-Spectrum (GPS) radio sources at 1.6 GHz. Of them, 15 sources are
selected from the Parkes Half Jansky (PHJ) sample (Snellen 2002), 4 others are
from our previous observation list. We aimed at imaging the structure of GPS
sources, sea... | astro-ph |
0704.0311 | Moment switching in nanotube magnetic force probes | A recent advance in improving the spatial resolution of magnetic force
microscopy (MFM) uses as sensor tips carbon nanotubes grown at the apex of
conventional silicon cantilever pyramids and coated with a thin ferromagnetic
layer. Magnetic images of high density vertically recorded media using these
tips exhibit a do... | cond-mat.mes-hall cond-mat.mtrl-sci |
0704.0312 | Power Spectra to 1% Accuracy between Dynamical Dark Energy Cosmologies | For dynamical dark energy cosmologies we carry out a series of N-body
gravitational simulations, achieving percent level accuracy in the relative
mass power spectra at any redshift. Such accuracy in the power spectrum is
necessary for next generation cosmological mass probes. Our matching procedure
reproduces the CMB... | astro-ph |
0704.0313 | Possibility of Gapless Spin Liquid State by One-dimensionalization | Motivated by the observation of a gapless spin liquid state in
$\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$, we analyze the anisotropic triangular
lattice $S=1/2$ Heisenberg model with the resonating valence bond mean-field
approximation. Paying attention to the small quasi-one-dimensional anisotropy
of the material, we tak... | cond-mat.str-el |
0704.0314 | Extra dimensions and Lorentz invariance violation | We consider effective model where photons interact with scalar field
corresponding to conformal excitations of the internal space (geometrical
moduli/gravexcitons). We demonstrate that this interaction results in a
modified dispersion relation for photons, and consequently, the photon group
velocity depends on the en... | hep-ph astro-ph hep-th |
0704.0315 | The small deviations of many-dimensional diffusion processes and
rarefaction by boundaries | We lead the algorithm of expansion of sojourn probability of many-dimensional
diffusion processes in small domain. The principal member of this expansion
defines normalizing coefficient for special limit theorems.
| math.PR math.AP |
0704.0316 | The Millennium Galaxy Catalogue: The local supermassive black hole mass
function in early- and late-type galaxies | We provide a new estimate of the local supermassive black hole mass function
using (i) the empirical relation between supermassive black hole mass and the
Sersic index of the host spheroidal stellar system and (ii) the measured
(spheroid) Sersic indices drawn from 10k galaxies in the Millennium Galaxy
Catalogue. The ... | astro-ph |
0704.0317 | Complete Shrinking Ricci Solitons have Finite Fundamental Group | We show that if a complete Riemannian manifold supports a vector field such
that the Ricci tensor plus the Lie derivative of the metric with respect to the
vector field has a positive lower bound, then the fundamental group is finite.
In particular, it follows that complete shrinking Ricci solitons and complete
smoot... | math.DG |
0704.0318 | Effects of Dirac sea on pion propagation in asymmetric nuclear matter | We study pion propagation in asymmetric nuclear matter (ANM). One of the
interesting consequences of pion propagation in ANM is the mode splitting for
the different charged states of pions. First we describe the pion-nucleon
dynamics using the non-chiral model where one starts with pseudoscalar (PS)
$\pi$N coupling a... | nucl-th hep-ph |
0704.0319 | Spin-orbit coupling effect on the persistent currents in mesoscopic ring
with an Anderson impurity | Based on the finite $U$ slave boson method, we have investigated the effect
of Rashba spin-orbit(SO) coupling on the persistent charge and spin currents in
mesoscopic ring with an Anderson impurity. It is shown that the Kondo effect
will decrease the magnitude of the persistent charge and spin currents in this
side-c... | cond-mat.mes-hall |
0704.0320 | Probability distributions generated by fractional diffusion equations | Fractional calculus allows one to generalize the linear, one-dimensional,
diffusion equation by replacing either the first time derivative or the second
space derivative by a derivative of fractional order. The fundamental solutions
of these equations provide probability density functions, evolving on time or
variabl... | cond-mat.stat-mech |
0704.0321 | Fabrication of half metallicity in a ferromagnetic metal | We investigate the growth of half metallic phase in a ferromagnetic material
using state-of-the-art full potential linearized augmented plane wave method.
To address the issue, we have substituted Ti at the Ru-sites in SrRuO3, where
SrRuO3 is a ferromagnetic material. Calculated results establish Ti4+ valence
states ... | cond-mat.str-el cond-mat.mtrl-sci |
0704.0322 | Emergence of spatiotemporal chaos driven by far-field breakup of spiral
waves in the plankton ecological systems | Alexander B. Medvinsky \emph{et al} [A. B. Medvinsky, I. A. Tikhonova, R. R.
Aliev, B.-L. Li, Z.-S. Lin, and H. Malchow, Phys. Rev. E \textbf{64}, 021915
(2001)] and Marcus R. Garvie \emph{et al} [M. R. Garvie and C. Trenchea, SIAM
J. Control. Optim. \textbf{46}, 775-791 (2007)] shown that the minimal
spatially exten... | nlin.PS nlin.CD q-bio.PE |
0704.0323 | General sequential quantum cloning | Some multipartite quantum states can be generated in a sequential manner
which may be implemented by various physical setups like microwave and optical
cavity QED, trapped ions, and quantum dots etc. We analyze the general N to M
qubits Universal Quantum Cloning Machine (UQCM) within a sequential generation
scheme. W... | quant-ph |
0704.0324 | On the pseudospectrum of elliptic quadratic differential operators | We study the pseudospectrum of a class of non-selfadjoint differential
operators. Our work consists in a detailed study of the microlocal properties,
which rule the spectral stability or instability phenomena appearing under
small perturbations for elliptic quadratic differential operators. The class of
elliptic quad... | math.AP |
0704.0325 | Fluctuation-dissipation relation on a Melde string in a turbulent flow,
considerations on a "dynamical temperature" | We report on measurements of the transverse fluctuations of a string in a
turbulent air jet flow. Harmonic modes are excited by the fluctuating drag
force, at different wave-numbers. This simple mechanical probe makes it
possible to measure excitations of the flow at specific scales, averaged over
space and time: it ... | cond-mat.stat-mech physics.ins-det |
0704.0326 | On generalized entropy measures and pathways | Product probability property, known in the literature as statistical
independence, is examined first. Then generalized entropies are introduced, all
of which give generalizations to Shannon entropy. It is shown that the nature
of the recursivity postulate automatically determines the logarithmic
functional form for S... | math.ST cond-mat.stat-mech stat.TH |
0704.0327 | Evolution of a band insulating phase from a correlated metallic phase | We investigate the evolution of the electronic structure in SrRu_(1-x)Ti_xO_3
as a function of x using high resolution photoemission spectroscopy, where
SrRuO3 is a weakly correlated metal and SrTiO3 is a band insulator. The surface
spectra exhibit a metal-insulator transition at x = 0.5 by opening up a soft
gap. A h... | cond-mat.str-el cond-mat.mtrl-sci |
0704.0328 | Electroweak phase transitions in the MSSM with an extra $U(1)'$ | We investigate the possibility of electroweak phase transition in the minimal
supersymmetric standard model (MSSM) with an extra $U(1)'$. This model has two
Higgs doublets and a singlet, in addition to a singlet exotic quark superfield.
We find that at the one-loop level this model may accommodate the electroweak
pha... | hep-ph |
0704.0329 | Solutions of fractional reaction-diffusion equations in terms of the
H-function | This paper deals with the investigation of the solution of an unified
fractional reaction-diffusion equation associated with the Caputo derivative as
the time-derivative and Riesz-Feller fractional derivative as the
space-derivative. The solution is derived by the application of the Laplace and
Fourier transforms in ... | math.PR math.CA math.ST stat.TH |
0704.0330 | Random Matrix Theory at Nonzero $\mu$ and $T$ | We review applications of random matrix theory to QCD at nonzero temperature
and chemical potential. The chiral phase transition of QCD and QCD-like
theories is discussed in terms of eigenvalues of the Dirac operator. We show
that for QCD at $\mu \ne 0$, which has a sign problem, the discontinuity in the
chiral conde... | hep-ph |
0704.0331 | Symmetries by base substitutions in the genetic code predict 2' or 3'
aminoacylation of tRNAs | This letter reports complete sets of two-fold symmetries between partitions
of the universal genetic code. By substituting bases at each position of the
codons according to a fixed rule, it happens that properties of the degeneracy
pattern or of tRNA aminoacylation specificity are exchanged.
| q-bio.OT |
0704.0332 | The effect of a fifth large-scale space-time dimension on the
conservation of energy in a four dimensional Universe | The effect of introducing a fifth large-scale space-time dimension to the
equations of orbital dynamics was analysed in an earlier paper by the authors.
The results showed good agreement with the observed flat rotation curves of
galaxies and the Pioneer Anomaly. This analysis did not require the
modification of Newto... | gr-qc |
0704.0333 | Optical properties of the Holstein-t-J model from dynamical mean-field
theory | We employ dynamical mean-field theory to study the optical conductivity
$\sigma(\omega)$ of one hole in the Holstein-t-J model. We provide an exact
solution for $\sigma(\omega)$ in the limit of infinite connectivity. We apply
our analysis to Nd$_{2-x}$Ce$_x$CuO$_4$. We show that our model can explain
many features of... | cond-mat.str-el |
0704.0334 | A Multiphilic Descriptor for Chemical Reactivity and Selectivity | In line with the local philicity concept proposed by Chattaraj et al.
(Chattaraj, P. K.; Maiti, B.; Sarkar, U. J. Phys. Chem. A. 2003, 107, 4973) and
a dual descriptor derived by Toro-Labbe and coworkers (Morell, C.; Grand, A.;
Toro-Labbe, A. J. Phys. Chem. A. 2005, 109, 205), we propose a multiphilic
descriptor. It ... | physics.chem-ph |
0704.0335 | Approximation of the distribution of a stationary Markov process with
application to option pricing | We build a sequence of empirical measures on the space D(R_+,R^d) of
R^d-valued c\`adl\`ag functions on R_+ in order to approximate the law of a
stationary R^d-valued Markov and Feller process (X_t). We obtain some general
results of convergence of this sequence. Then, we apply them to Brownian
diffusions and solutio... | math.PR q-fin.CP q-fin.PR |
0704.0336 | Influence of Phonon dimensionality on Electron Energy Relaxation | We studied experimentally the role of phonon dimensionality on
electron-phonon (e-p) interaction in thin copper wires evaporated either on
suspended silicon nitride membranes or on bulk substrates, at sub-Kelvin
temperatures. The power emitted from electrons to phonons was measured using
sensitive normal metal-insula... | cond-mat.mes-hall |
0704.0337 | Bursting Dynamics of the 3D Euler Equations in Cylindrical Domains | A class of three-dimensional initial data characterized by uniformly large
vorticity is considered for the Euler equations of incompressible fluids. The
fast singular oscillating limits of the Euler equations are studied for
parametrically resonant cylinders. Resonances of fast swirling Beltrami waves
deplete the Eul... | math.AP |
0704.0338 | Synergistic Effects of MoDTC and ZDTP on Frictional Behaviour of
Tribofilms at the Nanometer Scale | The layered structure and the rheological properties of anti-wear films,
generated in a rolling/sliding contact from lubricants containing zinc
dialkyldithiophosphate (ZDTP) and/or molybdenum dialkyldithiocarbamate (MoDTC)
additives, have been studied by dynamic nanoindentation experiments coupled
with a simple model... | cond-mat.mtrl-sci |
0704.0339 | Lattice Boltzmann inverse kinetic approach for the incompressible
Navier-Stokes equations | In spite of the large number of papers appeared in the past which are devoted
to the lattice Boltzmann (LB) methods, basic aspects of the theory still remain
unchallenged. An unsolved theoretical issue is related to the construction of a
discrete kinetic theory which yields \textit{exactly} the fluid equations,
i.e.,... | physics.flu-dyn physics.comp-ph |
0704.0340 | Phonon-mediated decay of an atom in a surface-induced potential | We study phonon-mediated transitions between translational levels of an atom
in a surface-induced potential. We present a general master equation governing
the dynamics of the translational states of the atom. In the framework of the
Debye model, we derive compact expressions for the rates for both upward and
downwar... | quant-ph |
0704.0341 | Infrared Evolution Equations: Method and Applications | It is a brief review on composing and solving Infrared Evolution Equations.
They can be used in order to calculate amplitudes of high-energy reactions in
different kinematic regions in the double-logarithmic approximation.
| hep-ph |
0704.0342 | Cofibrations in the Category of Frolicher Spaces. Part I | Cofibrations are defined in the category of Fr\"olicher spaces by weakening
the analog of the classical definition to enable smooth homotopy extensions to
be more easily constructed, using flattened unit intervals. We later relate
smooth cofibrations to smooth neighborhood deformation retracts. The notion of
smooth n... | math.AT |
0704.0343 | Experimental observation of structural crossover in binary mixtures of
colloidal hard spheres | Using confocal-microscopy we investigate the structure of binary mixtures of
colloidal hard spheres with size ratio q=0.61. As a function of the packing
fraction of the two particle species, we observe a marked change of the
dominant wavelength in the pair correlation function. This behavior is in
excellent agreement... | cond-mat.soft cond-mat.dis-nn |
0704.0344 | The Blazar Spectral Sequence and GLAST | The present status and understanding of the "spectral sequence" of blazars is
discussed in the perspective of the upcoming GLAST launch. The vast improvement
in sensitivity will allow to i) determine more objectively the "average"
gamma-ray properties of classes objects ii) probe more deeply the ratio between
accreti... | astro-ph |
0704.0345 | A High Robustness and Low Cost Model for Cascading Failures | We study numerically the cascading failure problem by using artificially
created scale-free networks and the real network structure of the power grid.
The capacity for a vertex is assigned as a monotonically increasing function of
the load (or the betweenness centrality). Through the use of a simple
functional form w... | physics.soc-ph |
0704.0346 | Diffuse X-ray Emission from the Carina Nebula Observed with Suzaku | A number of giant HII regions are associated with soft diffuse X-ray
emission. Among these, the Carina nebula possesses the brightest soft diffuse
emission. The required plasma temperature and thermal energy can be produced by
collisions or termination of fast winds from main-sequence or embedded young O
stars, but t... | astro-ph |
0704.0347 | Resolvent estimates related with a class of dispersive equations | We present a simple proof of the resolvent estimates of elliptic Fourier
multipliers on the Euclidean space, and apply them to the analysis of
time-global and spatially-local smoothing estimates of a class of dispersive
equations. For this purpose we study in detail the properties of the
restriction of Fourier transf... | math.AP math.CA |
0704.0348 | What can emission lines tell us? | 1 Generalities
2 Empirical diagnostics based on emission lines
3 Photoionization modelling
4 Pending questions
5 Appendix: Lists of useful lines and how to deal with them
| astro-ph |
0704.0349 | The Colin de Verdi\`ere number and graphs of polytopes | The Colin de Verdi\`ere number $\mu(G)$ of a graph $G$ is the maximum corank
of a Colin de Verdi\`ere matrix for $G$ (that is, of a Schr\"odinger operator
on $G$ with a single negative eigenvalue). In 2001, Lov\'asz gave a
construction that associated to every convex 3-polytope a Colin de Verdi\`ere
matrix of corank ... | math.CO math.MG |
0704.0350 | Visible spectroscopic and photometric survey of Jupiter Trojans: final
results on dynamical families | We present the results of a visible spectroscopic and photometric survey of
Jupiter Trojans belonging to different dynamical families carried out at the
ESO-NTT telescope. We obtained data on 47 objects, 23 belonging to the L5 swarm
and 24 to the L4 one. These data together with those already published by
Fornasier e... | astro-ph |
0704.0351 | FIRST-based survey of Compact Steep Spectrum sources, V.
Milliarcsecond-scale morphology of CSS objects | Multifrequency VLBA observations of the final group of ten objects in a
sample of FIRST-based compact steep spectrum (CSS) sources are presented. The
sample was selected to investigate whether objects of this kind could be relics
of radio-loud AGNs switched off at very early stages of their evolution or
possibly to i... | astro-ph |
0704.0352 | Investigation of relaxation phenomena in high-temperature
superconductors HoBa2Cu3O7-d at the action of pulsed magnetic fields | It is used the mechanical method of Abrikosov vortex stimulated dynamics
investigation in superconductors. With its help it was studied relaxation
phenomena in vortex matter of high-temperature superconductors. It established
that pulsed magnetic fields change the course of relaxation processes taking
place in vortex... | cond-mat.soft cond-mat.supr-con |
0704.0353 | Spin and pseudospin symmetries and the equivalent spectra of
relativistic spin-1/2 and spin-0 particles | We show that the conditions which originate the spin and pseudospin
symmetries in the Dirac equation are the same that produce equivalent energy
spectra of relativistic spin-1/2 and spin-0 particles in the presence of vector
and scalar potentials. The conclusions do not depend on the particular shapes
of the potentia... | nucl-th quant-ph |
0704.0354 | General asymptotic solutions of the Einstein equations and phase
transitions in quantum gravity | We discuss generic properties of classical and quantum theories of gravity
with a scalar field which are revealed at the vicinity of the cosmological
singularity. When the potential of the scalar field is exponential and
unbounded from below, the general solution of the Einstein equations has
quasi-isotropic asymptot... | hep-th gr-qc |
0704.0355 | Trigonometric parallaxes of high velocity halo white dwarf candidates | The status of 38 halo white dwarf candidates identified by Oppenheimer et al.
(2001) has been intensively discussed by various authors. In analyses
undertaken to date, trigonometric parallaxes are crucial missing data. Distance
measurements are mandatory to kinematically segregate halo object from disk
objects and he... | astro-ph |
0704.0356 | AMR simulations of the low T/|W| bar-mode instability of neutron stars | It has been recently argued through numerical work that rotating stars with a
high degree of differential rotation are dynamically unstable against bar-mode
deformation, even for values of the ratio of rotational kinetic energy to
gravitational potential energy as low as O(0.01). This may have implications
for gravit... | astro-ph |
0704.0357 | Evolutionary games on minimally structured populations | Population structure induced by both spatial embedding and more general
networks of interaction, such as model social networks, have been shown to have
a fundamental effect on the dynamics and outcome of evolutionary games. These
effects have, however, proved to be sensitive to the details of the underlying
topology ... | q-bio.PE q-bio.OT |
0704.0358 | Flavor Physics in SUSY at large tan(beta) | We discuss the phenomenological impact of a particularly interesting corner
of the MSSM: the large tan(beta) regime. The capabilities of leptonic and
hadronic Flavor Violating processes in shedding light on physics beyond the
Standard Model are reviewed. Moreover, we show that tests of Lepton
Universality in charged ... | hep-ph |
0704.0359 | Some properties of the complex Monge-Ampere operator in Cegrell's
classes and applications | In this article we will first prove a result about convergence in capacity.
Using the achieved result we will obtain a general decompositon theorem for
complex Monge-Ampere measues which will be used to prove a comparison principle
for the complex Monge-Ampere operator.
| math.CV |
0704.0360 | Torsional oscillations of longitudinally inhomogeneous coronal loops | We explore the effect of an inhomogeneous mass density field on frequencies
and wave profiles of torsional Alfven oscillations in solar coronal loops.
Dispersion relations for torsional oscillations are derived analytically in
limits of weak and strong inhomogeneities. These analytical results are
verified by numeric... | astro-ph |
0704.0361 | Pseudo-random Puncturing: A Technique to Lower the Error Floor of Turbo
Codes | It has been observed that particular rate-1/2 partially systematic parallel
concatenated convolutional codes (PCCCs) can achieve a lower error floor than
that of their rate-1/3 parent codes. Nevertheless, good puncturing patterns can
only be identified by means of an exhaustive search, whilst convergence towards
low ... | cs.IT math.IT |
0704.0362 | The Arctic Circle Revisited | The problem of limit shapes in the six-vertex model with domain wall boundary
conditions is addressed by considering a specially tailored bulk correlation
function, the emptiness formation probability. A closed expression of this
correlation function is given, both in terms of certain determinant and
multiple integra... | math-ph hep-th math.MP |
0704.0363 | Time and motion in physics: the Reciprocity Principle, relativistic
invariance of the lengths of rulers and time dilatation | Ponderable objects moving in free space according to Newton's First Law
constitute both rulers and clocks when one such object is viewed from the rest
frame of another. Together with the Reciprocity Principle this is used to
demonstrate, in both Galilean and special relativity, the invariance of the
measured length o... | physics.gen-ph |
0704.0364 | B --> rho K* decays and other rare vector-vector modes | The recent analyses of the following rare vector-vector decays of the B meson
are presented: rho K*, omega K*, omega rho, omega omega, and omega phi
charmless final states. The latest results indicate that the fraction of
longitudinal polarization is about 0.5 in penguin-dominated modes and close to
1 for tree-domina... | hep-ex |
0704.0365 | Extending the theory of phonon-mediated superconductivity in quasi-2D | I present results from an extended Migdal-Eliashberg theory of
electron-phonon interactions and superconductivity. The history of the
electron-phonon problem is introduced, and then study of the intermediate
parameter regime is justified from the energy scales in the cuprate
superconductors. The Holstein model is det... | cond-mat.supr-con cond-mat.str-el |
0704.0366 | Generalized Nariai Solutions for Yang-type Monopoles | A detailed study of the geometries that emerge by a gravitating generalized
Yang monopole in even dimensions is carried out. In particular, those which
present black hole and cosmological horizons. This two-horizon system is
thermally unstable. The process of thermalization will drive both horizons to
coalesce. This ... | gr-qc hep-th |
0704.0367 | Instanton representation of Plebanski gravity. Consistency of the
initital value constraints under time evolution | The instanton representation of Plebanski gravity provides as equations of
motion a Hodge self-duality condition and a set of `generalized' Maxwell's
equations, subject to gravitational degrees of freedom encoded in the initial
value constraints of general relativity. The main result of the present paper
will be to p... | gr-qc |
0704.0368 | Metal-insulator transition in the low-dimensional organic conductor
(TMTSF)2FSO3 probed by infrared microspectroscopy | We present measurements of the infrared response of the quasi-one-dimensional
organic conductor (TMTSF)2$SO3 along (E||a) and perpendicular (E||b') to the
stacking axis as a function of temperature. Above the metal-insulator
transition related to the anion ordering the optical conductivity spectra show
a Drude-like r... | cond-mat.str-el |
0704.0369 | The effect of Topcolor Assisted Technicolor, and other models, on
Neutrino Oscillation | New physics beyond the Standard Model can lead to extra matter effects on
neutrino oscillation if the new interactions distinguish among the three
flavors of neutrino. In Ref.1, we argued that a long-baseline neutrino
oscillation experiment in which the Fermilab-NUMI beam in its high-energy mode
is aimed at the plann... | hep-ph |
0704.0370 | Shaped angular dependence of the spin transfer torque and microwave
generation without magnetic field | The generation of oscillations in the microwave frequency range is one of the
most important applications expected from spintronics devices exploiting the
spin transfer phenomenon. We report transport and microwave power measurements
on specially designed nanopillars for which a non-standard angular dependence
of the... | cond-mat.mtrl-sci |
0704.0371 | Dark energy interacting with neutrinos and dark matter: a
phenomenological theory | A model for a flat homogeneous and isotropic Universe composed of dark
energy, dark matter, neutrinos, radiation and baryons is analyzed. The fields
of dark matter and neutrinos are supposed to interact with the dark energy. The
dark energy is considered to obey either the van der Waals or the Chaplygin
equations of ... | gr-qc |
0704.0372 | Levy-Lieb constrained-search formulation as a minimization of the
correlation functional | The constrained-search formulation of Levy and Lieb, which formally defines
the exact Hohenberg-Kohn functional for any N-representable electron density,
is here shown to be equivalent to the minimization of the correlation
functional with respect to the N-1 conditional probability density, where N is
number of elect... | quant-ph |
0704.0373 | Reality of linear and angular momentum expectation values in bound
states | In quantum mechanics textbooks the momentum operator is defined in the
Cartesian coordinates and rarely the form of the momentum operator in spherical
polar coordinates is discussed. Consequently one always generalizes the
Cartesian prescription to other coordinates and falls in a trap. In this work
we introduce the ... | quant-ph hep-th |
0704.0374 | Gravity-induced electric polarization of matter and planetary magnetic
fields | This paper has been withdrawn due to copyright reasons.
| physics.geo-ph |
0704.0375 | Rich methane premixed laminar flames doped by light unsaturated
hydrocarbons - Part I : allene and propyne | The structure of three laminar premixed rich flames has been investigated: a
pure methane flame and two methane flames doped by allene and propyne,
respectively. The gases of the three flames contain 20.9% (molar) of methane
and 33.4% of oxygen, corresponding to an equivalence ratio of 1.25 for the pure
methane flame... | physics.chem-ph |
0704.0376 | Environmental noise reduction for holonomic quantum gates | We study the performance of holonomic quantum gates, driven by lasers, under
the effect of a dissipative environment modeled as a thermal bath of
oscillators. We show how to enhance the performance of the gates by suitable
choice of the loop in the manifold of the controllable parameters of the laser.
For a simplifie... | quant-ph cond-mat.mes-hall |
0704.0377 | The lifetime of unstable particles in electromagnetic fields | We show that the electromagnetic moments of unstable particles (resonances)
have an absorptive contribution which quantifies the change of the particle's
lifetime in an external electromagnetic field. To give an example we compute
here the imaginary part of the magnetic moment for the cases of the muon and
the neutro... | hep-ph hep-th nucl-th |
0704.0378 | An equilibrium problem for the limiting eigenvalue distribution of
banded Toeplitz matrices | We study the limiting eigenvalue distribution of $n\times n$ banded Toeplitz
matrices as $n\to \infty$. From classical results of Schmidt-Spitzer and
Hirschman it is known that the eigenvalues accumulate on a special curve in the
complex plane and the normalized eigenvalue counting measure converges weakly
to a measu... | math.CV math.CA |
0704.0379 | Capturing knots in polymers | This paper visualizes a knot reduction algorithm
| cond-mat.soft cond-mat.stat-mech |
0704.0380 | Exponential growth rates in a typed branching diffusion | We study the high temperature phase of a family of typed branching diffusions
initially studied in [Ast\'{e}risque 236 (1996) 133--154] and [Lecture Notes in
Math. 1729 (2000) 239--256 Springer, Berlin]. The primary aim is to establish
some almost-sure limit results for the long-term behavior of this particle
system,... | math.PR |
0704.0381 | The collision velocity of the bullet cluster in conventional and
modified dynamics | We consider the orbit of the bullet cluster 1E 0657-56 in both CDM and MOND
using accurate mass models appropriate to each case in order to ascertain the
maximum plausible collision velocity. Impact velocities consistent with the
shock velocity (~ 4700km/s) occur naturally in MOND. CDM can generate collision
velociti... | astro-ph |
0704.0382 | On Some Subgroup Chains Related to Kneser's Theorem | A recent result of Balandraud shows that for every subset S of an abelian
group G, there exists a non trivial subgroup H such that |TS| <= |T|+|S|-2
holds only if the stabilizer of TS contains H. Notice that Kneser's Theorem
says only that the stabilizer of TS must be a non-zero subgroup.
This strong form of Kneser... | math.NT |
0704.0383 | The Exact Boundary Condition to Solve the Schrodinger Equation of Many
Electron System | In an attempt to bypass the sign problem in quantum Monte Carlo simulation of
electronic systems within the framework of fixed node approach, we derive the
exclusion principle "Two electrons can't be at the same external isopotential
surface simultaneously" using the first postulate of quantum mechanics. We
propose t... | cond-mat.str-el |
0704.0384 | Clustering features of $^9$Be, $^{14}$N, $^7$Be, and $^8$B nuclei in
relativistic fragmentation | Recent studies of clustering in light nuclei with an initial energy above 1 A
GeV in nuclear treack emulsion are overviewed. The results of investigations of
the relativistic $^9$Be nuclei fragmentation in emulsion, which entails the
production of He fragments, are presented. It is shown that most precise
angular mea... | nucl-ex |
0704.0385 | Super-shell structures and pairing in ultracold trapped Fermi gases | We calculate level densities and pairing gaps for an ultracold dilute gas of
fermionic atoms in harmonic traps under the influence of mean field and
anharmonic quartic trap potentials. Super-shell structures, which were found in
Hartree-Fock calculations, are calculated analytically within periodic orbit
theory as we... | cond-mat.other |
0704.0386 | Quantum non-local effects with Bose-Einstein condensates | We study theoretically the properties of two Bose-Einstein condensates in
different spin states, represented by a double Fock state. Individual
measurements of the spins of the particles are performed in transverse
directions, giving access to the relative phase of the condensates. Initially,
this phase is completely... | quant-ph cond-mat.other |
0704.0387 | Low mass visual binaries in the solar neighbourhood: The case of
HD141272 | We search for stellar and substellar companions of young nearby stars to
investigate stellar multiplicity and formation of stellar and substellar
companions. We detect common proper-motion companions of stars via multi-epoch
imaging. Their companionship is finally confirmed with photometry and
spectroscopy. Here we r... | astro-ph |
0704.0388 | Sterile neutrinos at the CNGS | We study the potential of the CNGS beam in constraining the parameter space
of a model with one sterile neutrino separated from three active ones by an
$\mathcal{O}(\eVq)$ mass-squared difference, $\Dmq_\Sbl$. We perform our
analysis using the OPERA detector as a reference (our analysis can be upgraded
including a de... | hep-ph |
0704.0389 | Evolution of the Carter constant for inspirals into a black hole: effect
of the black hole quadrupole | We analyze the effect of gravitational radiation reaction on generic orbits
around a body with an axisymmetric mass quadrupole moment Q to linear order in
Q, to the leading post-Newtonian order, and to linear order in the mass ratio.
This system admits three constants of the motion in absence of radiation
reaction: e... | gr-qc |
0704.0390 | Dual billiards, Fagnano orbits and regular polygons | We study the notion of Fagnano orbits for dual polygonal billiards. We used
them to characterize regular polygons and we study the iteration of the
developing map.
| math.DS |
0704.0391 | Exactly solvable spin dynamics of an electron coupled to large number of
nuclei and the electron-nuclear spin echo in a quantum dot | The model considered in the paper is used nowadays to describe spin dynamics
of quantum dots after optical excitation. Based on the exact diagonalization of
a model Hamiltonian, we solve the problems of the electron spin polarization
decay and magnetic field dependence of the steady state polarization. The
important ... | cond-mat.mes-hall |
0704.0392 | Simulation of Robustness against Lesions of Cortical Networks | Structure entails function and thus a structural description of the brain
will help to understand its function and may provide insights into many
properties of brain systems, from their robustness and recovery from damage, to
their dynamics and even their evolution. Advances in the analysis of complex
networks provid... | q-bio.NC cond-mat.dis-nn physics.soc-ph |
0704.0393 | A thermodynamic model for the melting of supported metal nanoparticles | We construct a simple thermodynamic model to describe the melting of a
supported metal nanoparticle with a spherically curved free surface both with
and without surface melting. We use the model to investigate the results of
recent molecular dynamics simulations, which suggest the melting temperature of
a supported m... | cond-mat.mtrl-sci |
0704.0394 | Average optimality for risk-sensitive control with general state space | This paper deals with discrete-time Markov control processes on a general
state space. A long-run risk-sensitive average cost criterion is used as a
performance measure. The one-step cost function is nonnegative and possibly
unbounded. Using the vanishing discount factor approach, the optimality
inequality and an opt... | q-fin.RM math.PR |
0704.0395 | A Study of $B_{d}^0 \to J/\Psi \eta^{(\prime)}$ Decays in the pQCD
Approach | Motivated by the very recent measurement of the branching ratio of ${B_d^0}
\to J/\psi \eta$ decay, we calculate the branching ratios of ${B_d}^0 \to
J/\psi \eta$ and ${B_d}^0 \to J/\Psi \eta'$ decays in the perturbative QCD
(pQCD) approach. The pQCD predictions for the branching ratios of considered
decays are: $BR(... | hep-ph |
0704.0396 | Finite-temperature phase transitions in a two-dimensional boson Hubbard
model | We study finite-temperature phase transitions in a two-dimensional boson
Hubbard model with zero-point quantum fluctuations via Monte Carlo simulations
of quantum rotor model, and construct the corresponding phase diagram.
Compressibility shows a thermally activated gapped behavior in the insulating
regime. Finite-si... | cond-mat.str-el |
0704.0397 | Conditional generation of path-entangled optical NOON states | We propose a measurement protocol to generate path-entangled NOON states
conditionally from two pulsed type II optical parametric oscillators. We
calculate the fidelity of the produced states and the success probability of
the protocol. The trigger detectors are assumed to have finite dead time, and
for short pulse t... | quant-ph |
0704.0398 | Renewals for exponentially increasing lifetimes, with an application to
digital search trees | We show that the number of renewals up to time $t$ exhibits distributional
fluctuations as $t\to\infty$ if the underlying lifetimes increase at an
exponential rate in a distributional sense. This provides a probabilistic
explanation for the asymptotics of insertion depth in random trees generated by
a bit-comparison ... | math.PR |
0704.0399 | Hawking radiation of linear dilaton black holes | We compute exactly the semi-classical radiation spectrum for a class of
non-asymptotically flat charged dilaton black holes, the so-called linear
dilaton black holes. In the high frequency regime, the temperature for these
black holes generically agrees with the surface gravity result. In the special
case where the b... | gr-qc hep-th |
0704.0400 | The S-Matrix of AdS/CFT and Yangian Symmetry | We review the algebraic construction of the S-matrix of AdS/CFT. We also
present its symmetry algebra which turns out to be a Yangian of the centrally
extended su(2|2) superalgebra.
| nlin.SI cond-mat.stat-mech hep-th |
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