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arxiv_dataset-500802.2703 | Optimal Medium Access Protocols for Cognitive Radio Networks
cs.IT cs.NI math.IT
This paper focuses on the design of medium access control protocols for
cognitive radio networks. The scenario in which a single cognitive user wishes
to opportunistically exploit the availability of empty frequency bands within
parts ... | arxiv topic:cs.IT cs.NI math.IT |
arxiv_dataset-501802.2803 | Quiver representations of maximal rank type and an application to
representations of a quiver with three vertices
math.RT math.RA
We introduce the notion of ''maximal rank type'' for representations of
quivers, which requires certain collections of maps involved in the
representation to be of maximal rank. We sho... | arxiv topic:math.RT math.RA |
arxiv_dataset-502802.2903 | Stable Sheaves Over K3 Fibrations
math.AG hep-th math-ph math.MP
We construct stable sheaves over K3 fibrations using a relative Fourier-Mukai
transform which describes the sheaves in terms of spectral data similar to the
construction for elliptic fibrations. On K3 fibered Calabi-Yau threefolds we
show that the Fou... | arxiv topic:math.AG hep-th math-ph math.MP |
arxiv_dataset-503802.3003 | Discrete Fracture Model with Anisotropic Load Sharing
cond-mat.stat-mech
A two-dimensional fracture model where the interaction among elements is
modeled by an anisotropic stress-transfer function is presented. The influence
of anisotropy on the macroscopic properties of the samples is clarified, by
interpolating b... | arxiv topic:cond-mat.stat-mech |
arxiv_dataset-504802.3103 | Novel Bonding technologies for wafer-level transparent packaging of
MOEMS
cs.OH
Depending on the type of Micro-Electro-Mechanical System (MEMS), packaging
costs are contributing up to 80% of the total device cost. Each MEMS device
category, its function and operational environment will individually dictate
the pa... | arxiv topic:cs.OH |
arxiv_dataset-505802.3203 | Magneto-spectroscopy of Highly-Aligned Carbon Nanotubes: Identifying the
Role of Threading Magnetic Flux
cond-mat.mes-hall cond-mat.mtrl-sci
We have investigated excitons in highly-aligned single-walled carbon
nanotubes (SWCNTs) through optical spectroscopy at low temperature (1.5 K) and
high magnetic fields ($\t... | arxiv topic:cond-mat.mes-hall cond-mat.mtrl-sci |
arxiv_dataset-506802.3303 | Metallicity effects on the modified wind momentum of CSPN
astro-ph
Recent investigations on the central stars of planetary nebulae (CSPN)
indicate that the masses based on model atmospheres can be much larger than the
masses derived from theoretical mass-luminosity relations. Also, the dispersion
in the relation be... | arxiv topic:astro-ph |
arxiv_dataset-507802.3403 | Goldman flows on the Jacobian
math.DG
We show that the Goldman flows preserve the holomorphic structure on the
moduli space of homomorphisms of the fundamental group of a Riemann surface
into U(1), in other words the Jacobian.
| arxiv topic:math.DG |
arxiv_dataset-508802.3503 | Controlling subluminal to superluminal behavior of group velocity in an
f-deformed Bose-Einstein condensate beyond the rotating wave approximation
quant-ph
In this paper, we investigate tunable control of the group velocity of a weak
probe field propagating through an f-deformed Bose-Einstein condensate of
three-... | arxiv topic:quant-ph |
arxiv_dataset-509802.3603 | String Creation, D-branes and Effective Field Theory
hep-th
This paper addresses several unsettled issues associated with string creation
in systems of orthogonal Dp-D(8-p) branes. The interaction between the branes
can be understood either from the closed string or open string picture. In the
closed string picture... | arxiv topic:hep-th |
arxiv_dataset-510802.3703 | On incidence algebras description of cobweb posets
math.CO cs.DM
The explicite formulas for Mobius function and some other important elements
of the incidence algebra of an arbitrary cobweb poset are delivered. For that
to do one uses Kwasniewski's construction of his cobweb posets . The digraph
representation of t... | arxiv topic:math.CO cs.DM |
arxiv_dataset-511802.3803 | On the nature of late X-ray flares in Swift Gamma-ray Bursts
astro-ph
Previously detected in only a few gamma-ray bursts (GRBs), X-ray flares are
now observed in ~50% of Swift GRBs, though their origins remain unclear. Most
flares are seen early on in the afterglow decay, while some bursts exhibit
flares at late ti... | arxiv topic:astro-ph |
arxiv_dataset-512802.3903 | Constraining Galaxy Evolution With Bulge-Disk-Bar Decomposition
astro-ph
Structural decomposition of galaxies into bulge, disk, and bar components is
important to address a number of scientific problems. Measuring bulge, disk,
and bar structural parameters will set constraints on the violent and secular
processes o... | arxiv topic:astro-ph |
arxiv_dataset-513802.4003 | Modeling of diffuse molecular gas applied to HD 102065 observations
astro-ph
Aims. We model a diffuse molecular cloud present along the line of sight to
the star HD 102065. We compare our modeling with observations to test our
understanding of physical conditions and chemistry in diffuse molecular clouds.
Methods. ... | arxiv topic:astro-ph |
arxiv_dataset-514802.4103 | Top-gated graphene field-effect-transistors formed by decomposition of
SiC
cond-mat.mes-hall cond-mat.mtrl-sci
Top-gated, few-layer graphene field-effect transistors (FETs) fabricated on
thermally-decomposed semi-insulating 4H-SiC substrates are demonstrated.
Physical vapor deposited SiO2 is used as the gate diel... | arxiv topic:cond-mat.mes-hall cond-mat.mtrl-sci |
arxiv_dataset-515802.4203 | Possible observation of energy level quantization in an intrinsic
Josephson junction
cond-mat.supr-con
Energy level quantization (ELQ) is studied to clarify the macroscopic quantum
dynamics of the d-wave Josephson junction (JJ). The influences of the nodal
quasiparticles of d-wave superconductivity on the damping... | arxiv topic:cond-mat.supr-con |
arxiv_dataset-516802.4303 | A new signature for color octet pseudoscalars at the LHC
hep-ph
Color octet (pseudo)scalars, if they exist, will be copiously produced at the
CERN Large Hadron Collider (LHC). However, their detection can become a very
challenging task. In particular, if their decay into a pair of top quarks is
kinematically forbid... | arxiv topic:hep-ph |
arxiv_dataset-517802.4403 | The puzzling MILAGRO hot spots
astro-ph
We discuss the reported detection by the MILAGRO experiment of localised hot
spots in the cosmic ray arrival distribution and the difficulty of interpreting
these observations. A model based on secondary neutron production in the
heliotail is shown to fail. An alternative mod... | arxiv topic:astro-ph |
arxiv_dataset-518803.004 | Minimal distance transformations between links and polymers: Principles
and examples
cond-mat.soft cond-mat.other
The calculation of Euclidean distance between points is generalized to
one-dimensional objects such as strings or polymers. Necessary and sufficient
conditions for the minimal transformation between t... | arxiv topic:cond-mat.soft cond-mat.other |
arxiv_dataset-519803.014 | Non-critical String Cosmologies
hep-ph
Non-critical String Cosmologies are offered as an alternative to Standard Big
Bang Cosmology. The new features encompassed within the dilaton dependent
non-critical terms affect the dynamics of the Universe\'s evolution in an
unconventional manner being in agreement with the c... | arxiv topic:hep-ph |
arxiv_dataset-520803.024 | On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
astro-ph
We have studied the properties of Seyfert galaxies with high [OIII]5007
blueshifts (`blue outliers'), originally identified because of their strong
deviation from the M_BH - sigma relation of normal, narrow-line Seyfert 1
(NLS1) and broad-li... | arxiv topic:astro-ph |
arxiv_dataset-521803.034 | Dynamical Creation of Fractionalized Vortices and Vortex Lattices
cond-mat.other cond-mat.dis-nn
We investigate dynamic creation of fractionalized half-quantum vortices in
Bose-Einstein condensates of sodium atoms. Our simulations show that both
individual half-quantum vortices and vortex lattices can be created in... | arxiv topic:cond-mat.other cond-mat.dis-nn |
arxiv_dataset-522803.044 | Ab-initio description of hole localization and Zhang-Rice singlets in
one-dimensional doped cuprates
cond-mat.str-el cond-mat.mtrl-sci
We present the first ab-initio band-theory-based description of
spin-compensated polarons (known as Zhang-Rice singlets) in a hole-doped
cuprate, specifically one-dimensional Ca_{... | arxiv topic:cond-mat.str-el cond-mat.mtrl-sci |
arxiv_dataset-523803.054 | The thermonuclear rate for the 19F(a,p)22Ne reaction at stellar
temperatures
nucl-ex
The $^{19}$F($\alpha$,p)$^{22}$Ne reaction is considered to be one of the
main sources of fluorine depletion in AGB and Wolf-Rayet stars. The reaction
rate still retains large uncertainties due to the lack of experimental studies... | arxiv topic:nucl-ex |
arxiv_dataset-524803.064 | Metric properties of Outer Space
math.GR math.GT
We define metrics on Culler-Vogtmann space, which are an analogue of the
Teichmuller metric and are constructed using stretching factors. In fact the
metrics we study are related, one being a symmetrised version of the other. We
investigate the basic properties of th... | arxiv topic:math.GR math.GT |
arxiv_dataset-525803.074 | A Deep HST Study of the Globular Cluster NGC 6397: Reduction Methods
astro-ph
We describe here the reduction methods that we developed to study the
faintest red dwarfs and white dwarfs in an outer field of NGC6397, which was
observed by \hst for 126 orbits in 2005. The particular challenge of this data
set is that ... | arxiv topic:astro-ph |
arxiv_dataset-526803.084 | Moufang symmetry X. Generalized Lie and Maurer-Cartan equations of
continuous Moufang transformations
math.RT
The differential equations for a continuous birepresentation of a local
analytic Moufang loop are established. The commutation relations for the
infinitesimal operators of the representation are found. Th... | arxiv topic:math.RT |
arxiv_dataset-527803.094 | A Smooth, Inductively Coupled Ring Trap for Atoms
physics.atom-ph cond-mat.other
We propose and numerically investigate a scalable ring trap for cold atoms
that surmounts problems of roughness of the potential and end--effects of trap
wires. A stable trapping potential is formed about an electrically isolated,
cond... | arxiv topic:physics.atom-ph cond-mat.other |
arxiv_dataset-528803.104 | Geometric Measure of Entanglement and Shared Quantum States
quant-ph
We give an explicit expression for the geometric measure of entanglement for
three qubit states that are linear combinations of four orthogonal product
states. It turns out that the geometric measure for these states has three
different expression... | arxiv topic:quant-ph |
arxiv_dataset-529803.114 | Incompressible Liquid, Stripes and Bubbles in rapidly rotating Bose
atoms at $\nu=1$
cond-mat.mes-hall
We numerically study the system of rapidly rotating Bose atoms at the filling
factor (ratio of particle number to vortex number) $\nu=1$ with the dipolar
interaction. A moderate dipolar interaction stabilizes th... | arxiv topic:cond-mat.mes-hall |
arxiv_dataset-530803.124 | Partial Observations, Einstein Locality and Bell Inequalities in
Quantized Detector Networks
quant-ph
Quantized detector networks (QDN) deals with quantum information exchange
between observers and their apparatus rather than with systems under
observation. Partial observations in QDN involve subsets of the eleme... | arxiv topic:quant-ph |
arxiv_dataset-531803.134 | Quantum Field Theory and Differential Geometry
physics.pop-ph hep-th math-ph math.DG math.MP
We introduce the historical development and physical idea behind topological
Yang-Mills theory and explain how a physical framework describing subatomic
physics can be used as a tool to study differential geometry. Further,... | arxiv topic:physics.pop-ph hep-th math-ph math.DG math.MP |
arxiv_dataset-532803.144 | X-ray absorption in distant type II QSOs
astro-ph
We present the results of the X-ray spectral analysis of an
XMM-Newton-selected type II QSO sample with z>0.5 and 0.5-10 keV flux of 0.3-33
x 10^{-14} erg/s/cm^2. The distribution of absorbing column densities in type
II QSOs is investigated and the dependence of ab... | arxiv topic:astro-ph |
arxiv_dataset-533803.154 | Nonholonomic constraints in $k$-symplectic Classical Field Theories
math-ph math.MP
A $k$-symplectic framework for classical field theories subject to
nonholonomic constraints is presented. If the constrained problem is regular
one can construct a projection operator such that the solutions of the
constrained probl... | arxiv topic:math-ph math.MP |
arxiv_dataset-534803.164 | Gravitational Lensing Constraints on Dynamical and Coupled Dark Energy
astro-ph
Upcoming Weak Lensing (WL) surveys can be used to constrain Dark Energy (DE)
properties, namely if tomographic techniques are used to improve their
sensitivity. In this work, we use a Fisher matrix technique to compare the
power of CMB ... | arxiv topic:astro-ph |
arxiv_dataset-535803.174 | Primes in the form $[\alpha p+\beta]$
math.NT
Let \beta be a real number. Then for almost all irrational \alpha>0 (in the
sense of Lebesgue measure)
\limsup_{x\to\infty}\pi_{\alpha,\beta}^*(x)(\log x)^2/x>=1, where
\pi_{\alpha,\beta}^*(x)={p<=x: both p and [\alpha p+\beta] are primes}.
| arxiv topic:math.NT |
arxiv_dataset-536803.184 | About Essence of the Wave Function on Atomic Level and in
Superconductors
physics.gen-ph
The wave function was proposed for description of quantum phenomena on the
atomic level. But now it is well known that quantum phenomena are observed not
only on atomic level and the wave function is used for description of
m... | arxiv topic:physics.gen-ph |
arxiv_dataset-537803.194 | Next-to-leading order QCD corrections to spin-dependent hadron-pair
photoproduction
hep-ph
We compute the next-to-leading order QCD corrections to the ``direct'' part
of the spin-dependent cross section for hadron-pair photoproduction. The
calculation is performed using largely analytical methods. We present a br... | arxiv topic:hep-ph |
arxiv_dataset-538803.204 | Standard Model couplings and collider signatures of a light scalar
hep-ph hep-ex
The electroweak symmetry breaking (EWSB) sector of the Standard Model can be
far richer and more interesting than the usual single scalar doublet model. We
explore scenarios where the EWSB sector is nearly scale invariant and
consequen... | arxiv topic:hep-ph hep-ex |
arxiv_dataset-539803.214 | Noise invoked resonances near a homoclinic bifurcation in the glow
discharge plasma
physics.plasm-ph nlin.CD physics.data-an
Stochastic Resonance (SR) and Coherence Resonance (CR) have been studied
experimentally in the discharge plasma close to a homoclinic bifurcation. For
the SR phenomena, it is observed that ... | arxiv topic:physics.plasm-ph nlin.CD physics.data-an |
arxiv_dataset-540803.224 | The Exo-planetary System of 55 Cancri and the Titius-Bode Law
astro-ph
The recent discovery of a fifth planet bound to 55 Cancri (Fischer et. al
2007) motivated us to investigate if this exo-planetary system fits some form
of the Titius-Bode (TB) law. We found that a simple exponential TB relation
reproduces very w... | arxiv topic:astro-ph |
arxiv_dataset-541803.234 | Noncommutative Standard Model in Top Quark Sector
hep-ph
In this article we aim to estimate the bounds on the noncommutative scale
$\Lambda_{NC}$ and to extract the 95% exclusion contours for some
$\theta_{\mu\nu}$ components using the recent measurements of the top quark
width and the $W$ boson polarization in top... | arxiv topic:hep-ph |
arxiv_dataset-542803.244 | Spin transfer torques in nonlocal lateral spin valve
cond-mat.mes-hall
We report a theoretical study on the spin and electron transport in the
nonlocal lateral spin valve with non-collinear magnetic configuration. The
nonlocal magnetoresistance, defined as the voltage difference on the detection
lead over the injec... | arxiv topic:cond-mat.mes-hall |
arxiv_dataset-543803.254 | When is Group Cohomology Finitary?
math.GR math.KT
If $G$ is a group, then we say that the functor $H^n(G,-)$ is finitary if it
commutes with all filtered colimit systems of coefficient modules. We
investigate groups with cohomology almost everywhere finitary; that is, groups
with $n$th cohomology functors finitary... | arxiv topic:math.GR math.KT |
arxiv_dataset-544803.264 | Antideuteron fluxes from dark matter annihilation in diffusion models
hep-ph astro-ph hep-ex
Antideuterons are among the most promising galactic cosmic ray-related
targets for dark matter indirect detection. Currently only upper limits exist
on the flux, but the development of new experiments, such as GAPS and AMS-... | arxiv topic:hep-ph astro-ph hep-ex |
arxiv_dataset-545803.274 | Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
cond-mat.supr-con cond-mat.mtrl-sci
We argue that the newly discovered superconductivity in a nearly magnetic,
Fe-based layered compound is unconventional and mediated by antiferromagnetic
spin fluctuations, though different from the usual superexc... | arxiv topic:cond-mat.supr-con cond-mat.mtrl-sci |
arxiv_dataset-546803.284 | IPHAS discoveries of young stars towards Cyg OB2 and its southern
periphery
astro-ph
We report on the discovery of over 50 strong Halpha emitting objects towards
the large OB association Cyg OB2 and the HII region DR 15 on its southern
periphery. This was achieved using the INT Photometric Halpha Survey of the
No... | arxiv topic:astro-ph |
arxiv_dataset-547803.294 | Operator fidelity susceptibility: an indicator of quantum criticality
quant-ph
We introduce the operator fidelity and propose to use its susceptibility for
characterizing the sensitivity of quantum systems to perturbations. Two typical
models are addressed: one is the transverse Ising model exhibiting a quantum
pha... | arxiv topic:quant-ph |
arxiv_dataset-548803.304 | Astronomy with ultra high-energy particles
astro-ph
Recent measurements of the properties of cosmic rays above 10^17 eV are
summarized and implications on our contemporary understanding of their origin
are discussed. Cosmic rays with energies exceeding 10^20 eV have been measured,
they are the highest-energy partic... | arxiv topic:astro-ph |
arxiv_dataset-549803.314 | Sharpness of some properties of Wiener amalgam and modulation spaces
math.FA math.AP
We prove sharp estimates for the dilation operator $f(x)\longmapsto f(\lambda
x)$, when acting on Wiener amalgam spaces $W(L^p,L^q)$. Scaling arguments are
also used to prove the sharpness of the known convolution and pointwise
rel... | arxiv topic:math.FA math.AP |
arxiv_dataset-550803.324 | Structure and stability of two-dimensional Bose-Einstein condensates
under both harmonic and lattice confinement
nlin.PS
In this work, we study pancake-shaped Bose-Einstein condensates confined by
both a cylindrically symmetric harmonic potential and an optical lattice with
equal periodicity in two orthogonal dir... | arxiv topic:nlin.PS |
arxiv_dataset-551803.334 | Type ${\rm III_1}$ factors generated by regular representations of
infinite dimensional nilpotent group $B_0^{\mathbb N}$
math.OA math.RT
We study the von Neumann algebra, generated by the unitary representations of
infinite-dimensional groups nilpotent group $B_0^{\mathbb N}$. The conditions
of the irreducibilit... | arxiv topic:math.OA math.RT |
arxiv_dataset-552803.344 | Manipulating a single adsorbed DNA for a critical endpoint
cond-mat.soft cond-mat.stat-mech
We show the existence of a critical endpoint in the phase diagram of
unzipping of an adsorbed double-stranded (ds) polymer like DNA. The competition
of base pairing, adsorption and stretching by an external force leads to th... | arxiv topic:cond-mat.soft cond-mat.stat-mech |
arxiv_dataset-553803.354 | The effect of rotation on the abundances of the chemical elements of the
A-type stars in the Praesepe cluster
astro-ph
We study how chemical abundances of late B-, A- and early F-type stars evolve
with time, and we search for correlations between the abundance of chemical
elements and other stellar parameters, su... | arxiv topic:astro-ph |
arxiv_dataset-554803.364 | Electrical control of spin coherence in ZnO
cond-mat.mtrl-sci
Electric field enhanced electron spin coherence is characterized using
time-resolved Faraday rotation spectroscopy in n-type ZnO epilayers grown by
molecular beam epitaxy. An in-plane dc electric field E almost doubles the
transverse spin lifetime at 20 ... | arxiv topic:cond-mat.mtrl-sci |
arxiv_dataset-555803.374 | False discovery rate analysis of brain diffusion direction maps
stat.AP
Diffusion tensor imaging (DTI) is a novel modality of magnetic resonance
imaging that allows noninvasive mapping of the brain's white matter. A
particular map derived from DTI measurements is a map of water principal
diffusion directions, which... | arxiv topic:stat.AP |
arxiv_dataset-556803.384 | Set families with a forbidden subposet
math.CO
We asymptotically determine the size of the largest family F of subsets of
{1,...,n} not containing a given poset P if the Hasse diagram of P is a tree.
This is a qualitative generalization of several known results including
Sperner's theorem.
| arxiv topic:math.CO |
arxiv_dataset-557803.394 | Saturation of $E_T/N_{ch}$ and Freeze-Out Criteria in Heavy-Ion
Collisions
hep-ph nucl-ex
The pseudorapidity densities of transverse energy, the charged particle
multiplicity and their ratios, $E_T/N_{ch}$, are estimated at mid-rapidity, in
a statistical-thermal model based on chemical freeze-out criteria, for a ... | arxiv topic:hep-ph nucl-ex |
arxiv_dataset-558803.404 | Probability distribution of the resistance of a random network
physics.class-ph
The probability density of the resistance of a two dimensional rectangular
network between two conducting plates is calculated. The nodes form an $M$ by
$N$ lattice, and each edge has a random resistance. The Monte Carlo method is
used.... | arxiv topic:physics.class-ph |
arxiv_dataset-559803.414 | Stretching helical nano-springs at finite temperature
cond-mat.soft cond-mat.stat-mech
Using dynamic simulations and analytic methods, we study the elastic response
of a helical filament subject to uniaxial tension over a wide range of bend and
twist persistence length. A low-pitch helix at low temperatures exhibit... | arxiv topic:cond-mat.soft cond-mat.stat-mech |
arxiv_dataset-560803.424 | Neutral Fitness Landscape in the Cellular Automata Majority Problem
cs.NE
We study in detail the fitness landscape of a difficult cellular automata
computational task: the majority problem. Our results show why this problem
landscape is so hard to search, and we quantify the large degree of neutrality
found in vari... | arxiv topic:cs.NE |
arxiv_dataset-561803.434 | Possible Indications of New Physics in Bd-mixing and in sin(2 beta)
Determinations
hep-ph hep-ex hep-lat
Using the hadronic matrix elements from the lattice, B_K and xi_s, involving
only the 4-quark operators for Delta flavor (F) = 2 Hamiltonian relevant for K,
B_d and B_s mixing, along with V_cb, we deduce a non... | arxiv topic:hep-ph hep-ex hep-lat |
arxiv_dataset-562803.444 | Solar forced Dansgaard-Oeschger events and their phase relation with
solar proxies
physics.geo-ph physics.ao-ph
North Atlantic climate during glacial times was characterized by
large-amplitude switchings, the Dansgaard-Oeschger (DO) events, with an
apparent tendency to recur preferably in multiples of about 1470 ... | arxiv topic:physics.geo-ph physics.ao-ph |
arxiv_dataset-563804.0021 | A Search for Interstellar CH$_2$D$^+$
astro-ph
We report on a search for Interstellar CH2D+. Four transitions occur in
easily accessible portions of the spectrum; we report on emission at the
frequencies of these transitions toward high column density star-forming
regions. While the observations can be interpreted ... | arxiv topic:astro-ph |
arxiv_dataset-564804.0121 | Basic properties of nonlinear stochastic Schr\"{o}dinger equations
driven by Brownian motions
math.PR
The paper is devoted to the study of nonlinear stochastic Schr\"{o}dinger
equations driven by standard cylindrical Brownian motions (NSSEs) arising from
the unraveling of quantum master equations. Under the Born-... | arxiv topic:math.PR |
arxiv_dataset-565804.0221 | Thermodynamics of a model for RNA folding
q-bio.BM
We analyze the thermodynamic properties of a simplified model for folded RNA
molecules recently studied by G. Vernizzi, H. Orland, A. Zee (in {\it Phys.
Rev. Lett.} {\bf 94} (2005) 168103). The model consists of a chain of
one-flavor base molecules with a flexible ... | arxiv topic:q-bio.BM |
arxiv_dataset-566804.0321 | Existence of an infinite particle limit of stochastic ranking process
math.PR
We study a stochastic particle system which models the time evolution of the
ranking of books by online bookstores (e.g., Amazon). In this system, particles
are lined in a queue. Each particle jumps at random jump times to the top of
the ... | arxiv topic:math.PR |
arxiv_dataset-567804.0421 | Backward retrieval in optical quantum memory controlled by an external
field
quant-ph
A scheme for backward retrieval in optical quantum memories in which
information is stored in collective states of an extended resonant atomic
ensemble is developed such that phase conjugation can be implemented by
application o... | arxiv topic:quant-ph |
arxiv_dataset-568804.0521 | The incidence of mid-infrared excesses in G and K giants
astro-ph
Using photometric data from the 2MASS and GLIMPSE catalogues, I investigate
the incidence of mid-infrared excesses (~10 microns) of G and K stars of
luminosity class III. In order to obtain a large sample size, stars are
selected using a near-IR colo... | arxiv topic:astro-ph |
arxiv_dataset-569804.0621 | Is there anything special about GRB 080319B?
astro-ph
We show that the properties of gamma ray burst 080319B and its afterglow are
well reproduced by the cannonball model of long gamma ray bursts (GRBs). It was
an ordinary GRB, produced by a jet of highly relativistic plasmoids (CBs),
ejected in a core-collapse sup... | arxiv topic:astro-ph |
arxiv_dataset-570804.0721 | Bell correlations and equal time measurements
quant-ph
According to the Bell theorem, local hidden variable theories cannot
reproduce all the predictions of quantum mechanics. An important consequence is
that under physically reasonable assumptions quantum mechanics predicts
correlations that seem impossible to obt... | arxiv topic:quant-ph |
arxiv_dataset-571804.0821 | Signature of Magnetic Phase Separation in the Ground State of
Pr1-xCaxMnO3
cond-mat.str-el cond-mat.mtrl-sci
Neutron scattering has been used to investigate the evolution of the long-
and short-range charge-ordered (CO), ferromagnetic (FM), and antiferromagnetic
(AF) correlations in single crystals of Pr1-xCaxMnO... | arxiv topic:cond-mat.str-el cond-mat.mtrl-sci |
arxiv_dataset-572804.0921 | Simplified Langevin approach to the Peyrard-Bishop-Dauxois model of DNA
cond-mat.soft
A simple Langevin approach is used to study stationary properties of the
Peyrard-Bishop-Dauxois model for DNA, allowing known properties to be recovered
in an easy way. Results are shown for the denaturation transition in
homogene... | arxiv topic:cond-mat.soft |
arxiv_dataset-573804.1021 | Differentiation of Kaltofen's division-free determinant algorithm
cs.SC cs.MS
Kaltofen has proposed a new approach in [Kaltofen 1992] for computing matrix
determinants. The algorithm is based on a baby steps/giant steps construction
of Krylov subspaces, and computes the determinant as the constant term of a
charact... | arxiv topic:cs.SC cs.MS |
arxiv_dataset-574804.1121 | Neutrino Oscillation Phenomenology
hep-ph
We explain the physics of neutrino oscillation in vacuum and in matter. We
attempt to clarify several features of oscillation that can be puzzling when
neutrinos are their own antiparticles.
| arxiv topic:hep-ph |
arxiv_dataset-575804.1221 | Strong cleanness of matrix rings over commutative rings
math.RA
Let $R$ be a commutative local ring. It is proved that $R$ is Henselian if
and only if each $R$-algebra which is a direct limit of module finite
$R$-algebras is strongly clean. So, the matrix ring $\mathbb{M}_n(R)$ is
strongly clean for each integer $n... | arxiv topic:math.RA |
arxiv_dataset-576804.1321 | High resolution spectroscopy for Cepheids distance determination. I.
Line asymmetry
astro-ph
The ratio of pulsation to radial velocity (the projection factor) is
currently limiting the accuracy of the interferometric Baade-Wesselink method.
This work aims at establishing a link between the line asymmetry evolutio... | arxiv topic:astro-ph |
arxiv_dataset-577804.1421 | A $O(\log m)$, deterministic, polynomial-time computable approximation
of Lewis Carroll's scoring rule
cs.GT cs.AI cs.MA
We provide deterministic, polynomial-time computable voting rules that
approximate Dodgson's and (the ``minimization version'' of) Young's scoring
rules to within a logarithmic factor. Our appr... | arxiv topic:cs.GT cs.AI cs.MA |
arxiv_dataset-578804.1521 | Tri-bimaximal neutrino mixing and neutrinoless double beta decay
hep-ph
We present a tri-bimaximal lepton mixing scheme where the neutrinoless double
beta decay rate (bb0v) has a lower bound which correlates with the ratio alpha
= Dmsol/Dmatm well determined by current data, as well as with the unknown
Majorana CP ... | arxiv topic:hep-ph |
arxiv_dataset-579804.1621 | Direct observation of Anderson localization of matter-waves in a
controlled disorder
cond-mat.dis-nn cond-mat.other
We report the observation of exponential localization of a Bose-Einstein
condensate (BEC) released into a one-dimensional waveguide in the presence of a
controlled disorder created by laser speckle ... | arxiv topic:cond-mat.dis-nn cond-mat.other |
arxiv_dataset-580804.1721 | Robust control of a bimorph mirror for adaptive optics system
math.AP
We apply robust control technics to an adaptive optics system including a
dynamic model of the deformable mirror. The dynamic model of the mirror is a
modification of the usual plate equation. We propose also a state-space
approach to model the t... | arxiv topic:math.AP |
arxiv_dataset-581804.1821 | Clustering Property of Wolf-Rayet Galaxies in the SDSS
astro-ph
We have analysed, for the first time, the clustering properties of Wolf-Rayet
(W-R) galaxies, using a large sample of 846 W-R galaxies selected from the Data
Release 4 (DR4) of the SDSS. We compute the cross-correlation function between
W-R galaxies an... | arxiv topic:astro-ph |
arxiv_dataset-582804.1921 | On the Extension of Pseudo-Boolean Functions for the Aggregation of
Interacting Criteria
cs.DM
The paper presents an analysis on the use of integrals defined for
non-additive measures (or capacities) as the Choquet and the \Sipos{} integral,
and the multilinear model, all seen as extensions of pseudo-Boolean func... | arxiv topic:cs.DM |
arxiv_dataset-583804.2021 | Parton fragmentation in the vacuum and in the medium
hep-ph
We present the mini-proceedings of the workshop on ``Parton fragmentation in
the vacuum and in the medium'' held at the European Centre for Theoretical
Studies in Nuclear Physics and Related Areas (ECT*, Trento) in February 2008.
The workshop gathered both... | arxiv topic:hep-ph |
arxiv_dataset-584804.2121 | Self-properties of codimension-2 braneworlds
hep-th gr-qc
We consider four-dimensional de Sitter, flat and anti de Sitter branes
embedded in a six-dimensional bulk spacetime whose dynamics is dictated by
Lovelock theory. We find, applying a generalised version of Birkhoff's theorem,
that all possible maximally symm... | arxiv topic:hep-th gr-qc |
arxiv_dataset-585804.2221 | Understanding Segmental Dynamics in Polymer Electrolytes: A Computer
Study
cond-mat.soft cond-mat.mtrl-sci
We study the segmental dynamics of poly(ethylene oxide) (PEO) from
microscopic simulations in the neat polymer and a polymer electrolyte
(PEO/LiBF$_4$) by analyzing the normal modes. We verify the applicabil... | arxiv topic:cond-mat.soft cond-mat.mtrl-sci |
arxiv_dataset-586804.2321 | Energy dissipation statistics in the random fuse model
cond-mat.stat-mech cond-mat.mtrl-sci
We study the statistics of the dissipated energy in the two-dimensional
random fuse model for fracture under different imposed strain conditions. By
means of extensive numerical simulations we compare different ways to compu... | arxiv topic:cond-mat.stat-mech cond-mat.mtrl-sci |
arxiv_dataset-587804.2421 | A 610-MHz survey of the Lockman Hole with the Giant Metrewave Radio
Telescope - I. Observations, data reduction and source catalogue for the
central 5 square degrees
astro-ph
We present observations of the Lockman Hole with the Giant Metrewave Radio
Telescope (GMRT). Twelve pointings were observed, covering a t... | arxiv topic:astro-ph |
arxiv_dataset-588804.2521 | Scalar order: possible candidate for order parameters in skutterudites
cond-mat.str-el
Phenomenological Landau analysis shows that the properties of ordered phases
in some skutterudites are consistently accounted for by a scalar order
parameter which preserves the cubic symmetry, even in the ordered phase. A
univer... | arxiv topic:cond-mat.str-el |
arxiv_dataset-589804.2621 | Design and Implementation of a Master of Science in Information and
Computer Sciences - An Inventory and retrospect for the last four years
cs.GL
This Master of Science in Computer and Information Sciences (MICS) is an
international accredited master program that has been initiated in 2004 and
started in Septembe... | arxiv topic:cs.GL |
arxiv_dataset-590804.2721 | Hilbert Transform: A New Integral Formula
math-ph math.MP
We give a number new examples analytically and numerically to confirm the
Kohler conjecture. It turned out that for a rather large class of nonnegative
functions the equality (A) hold.
| arxiv topic:math-ph math.MP |
arxiv_dataset-591804.2821 | Theoretical interpretation of luminosity and spectral properties of GRB
031203
astro-ph
We show how an emission endowed with an instantaneous thermal spectrum in the
co-moving frame of the expanding fireshell can reproduce the time-integrated
GRB observed non-thermal spectrum. An explicit example in the case of G... | arxiv topic:astro-ph |
arxiv_dataset-592804.2921 | The nature of Ho magnetism in multiferroic HoMnO3
cond-mat.other cond-mat.mtrl-sci
Using x-ray resonant magnetic scattering and x-ray magnetic circular
dichroism, techniques that are element specific, we have elucidated the role of
Ho3+ in multiferroic HoMnO3. In zero field, Ho3+ orders antiferromagnetically
with m... | arxiv topic:cond-mat.other cond-mat.mtrl-sci |
arxiv_dataset-593804.3021 | A narrow-linewidth external cavity quantum dot laser for high-resolution
spectroscopy in the near-infrared and yellow spectral ranges
physics.atom-ph
We demonstrate a diode laser system which is suitable for high-resolution
spectroscopy in the 1200 nm and yellow spectral ranges. It is based on a
two-facet quantum... | arxiv topic:physics.atom-ph |
arxiv_dataset-594804.3121 | Particle-like solutions to classical noncommutative gauge theory
hep-th
We construct perturbative static solutions to the classical field equations
of noncommutative U(1) gauge theory for the three cases: a) space-time
noncommutativity, b) space-space noncommutativity and c) both a) and b). The
solutions tend to th... | arxiv topic:hep-th |
arxiv_dataset-595804.3221 | Photon orbital angular momentum in a plasma vortex
physics.plasm-ph physics.space-ph
We study theoretically the exchange of angular momentum between a photon beam
and a plasma vortex, and demonstrate the possible excitation of photon angular
momentum states in a plasma. This can be relevant to laboratory and space
... | arxiv topic:physics.plasm-ph physics.space-ph |
arxiv_dataset-596804.3321 | Exploring an S-matrix for gravitational collapse
hep-th
We analyze further a recently proposed S-matrix description of transplanckian
scattering in the specific case of axisymmetric collisions of extended sources,
where some of the original approximations are not necessary. We confirm the
claim that such an approxi... | arxiv topic:hep-th |
arxiv_dataset-597804.3421 | Coalitions in Cooperative Wireless Networks
cs.GT cs.IT math.IT
Cooperation between rational users in wireless networks is studied using
coalitional game theory. Using the rate achieved by a user as its utility, it
is shown that the stable coalition structure, i.e., set of coalitions from
which users have no incent... | arxiv topic:cs.GT cs.IT math.IT |
arxiv_dataset-598804.3521 | The HI content of the advanced merger NGC 4441
astro-ph
NGC 4441 is a candidate for a merger between a spiral and an elliptical
galaxy (S+E merger), because it shows typical tidal structures such as an
optical tail and two shells. With a far-infrared luminosity of $\sim 5\cdot
10^9 L_{\odot}$ this galaxy belongs to... | arxiv topic:astro-ph |
arxiv_dataset-599804.3621 | Representation Theory of the Algebra Generated By a Pair of Complex
Structures
math.RT hep-th math.DG
The objective of this paper is to determine the finite dimensional,
indecomposable representations of the algebra that is generated by two complex
structures over the real numbers. Since the generators satisfy re... | arxiv topic:math.RT hep-th math.DG |
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