Showing 2005Show all

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math.MG2005★ 20 cited

On the dynamics of isometries

Anders Karlsson

We provide an analysis of the dynamics of isometries and semicontractions of metric spaces. Certain subsets of the boundary at infinity play a fundamental role and are identified c…

math.CO2005

Independence complexes of claw-free graphs

Alexander Engström

We study the class of independence complexes of claw-free graphs. The main theorem give good bounds on the connectivity of these complexes, given bounds for a few subcomplexes of t…

cond-mat.other2005★ 199 cited

Managing the supercell approximation for charged defects in semiconductors: finite size scaling, charge correction factors, the bandgap problem and the ab initio dielectric constant

C. W. M. Castleton, A. Hoglund, S. Mirbt

The errors arising in ab initio density functional theory studies of semiconductor point defects using the supercell approximation are analyzed. It is demonstrated that a) the lead…

cond-mat.other2005★ 73 cited

Finite size scaling as a cure for supercell approximation errors in calculations of neutral native defects in InP

C. W. M. Castleton, S. Mirbt

The relaxed and unrelaxed formation energies of neutral antisites and interstitial defects in InP are calculated using ab initio density functional theory and simple cubic supercel…

math-ph2005★ 202 cited

Boson Stars as Solitary Waves

Juerg Froehlich, B. Lars G. Jonsson, Enno Lenzmann

We study the nonlinear equation on $\RR^3$, which is known to describe the dynamics of pseudo-relativistic boson…

quant-ph2005★ 28 cited

Validity of adiabaticity in Cavity QED

J. Larson, S. Stenholm

This paper deals with the concept of adiabaticity for fully quantum mechanically cavity QED models. The physically interesting cases of Gaussian and standing wave shapes of the cav…

physics.ins-det2005★ 22 cited

A Study of the Operation of Especially Designed Photosensitive Gaseous Detectors at Cryogenic Temperatures

L. Periale, V. Peskov, C. Iacobaeus +4

In some experiments and applications there is need for large-area photosensitive detectors to operate at cryogenic temperatures. Nowadays, vacuum PMs are usually used for this purp…

math.AC2005

Level algebras with bad properties

Mats Boij, Fabrizio Zanello

This paper can be seen as a continuation of the works contained in the recent preprints [Za], of the second author, and [Mi], of Juan Migliore. Our results are: 1). There exist cod…

hep-ex2005★ 108 cited

Measurement of the Isolated Photon Cross Section in p-pbar Collisions at sqrt{s}=1.96 TeV

D0 Collaboration

The cross section for the inclusive production of isolated photons has been measured in p anti-p collisions at sqrt{s}=1.96 TeV with the D0 detector at the Fermilab Tevatron Collid…

math-ph2005★ 7 cited

Explicit formulas for the eigenfunctions of the N-body Calogero model

Martin Hallnäs, Edwin Langmann

We consider the quantum Calogero model, which describes N non-distinguishable quantum particles on the real line confined by a harmonic oscillator potential and interacting via two…

quant-ph2005★ 1 cited

Memory Efficient Quantum Circuit Simulator Based on Linked List Architecture

Wissam Abdel Samad, Roy Ghandour, Mohamad Nabil Hajj Chehade

In this paper, we will introduce the quantum circuit simulator we developed in C++ environment. We devise a novel method for efficient memory handling using linked list structures…

physics.data-an2005★ 2 cited

Likelihood ratio intervals with Bayesian treatment of uncertainties: coverage, power and combined experiments

Jan Conrad, Fredrik Tegenfeldt

In this note we present studies of coverage and power for confidence intervals for a Poisson process with known background calculated using the Likelihood ratio (aka Feldman & Cous…

nucl-th2005

Mass number dependence of the Skyrme-force-induced nuclear symmetry energy

M. Rafalski, W. Satula, R. Wyss

The global mass dependence of the nuclear symmetry energy and its two basic ingredients due to the mean-level spacing and effective strength of the isovector mean-potential is stud…

math.AT2005★ 1 cited

Representations of Spaces

W. Chacholski, J. Scherer

We explain how the notion of homotopy colimits gives rise to that of mapping spaces, even in categories which are not simplicial. We apply the technique of model approximations and…

math.AC2005

Improving the bounds of the Multiplicity Conjecture: the codimension 3 level case

Fabrizio Zanello

The Multiplicity Conjecture (MC) of Huneke and Srinivasan provides upper and lower bounds for the multiplicity of a Cohen-Macaulay algebra in terms of the shifts appearing in t…

hep-ph2005★ 6 cited

The Effective Matter Potential for Highly Relativistic Neutrinos

Thomas Konstandin, Tommy Ohlsson

We investigate matter effects on highly relativistic neutrinos. The self-energy of neutrinos is determined in an electron or neutrino background taking into account resonance and f…

cond-mat.mes-hall2005★ 7 cited

Non-equilibrium triplet blockade in parallel coupled quantum dots

J. Fransson

It is demonstrated that parallel weakly coupled quantum dots exhibit non-equilibrium blockade regimes caused by a full occupation in the spin triplet state, in analogy to the Pauli…

quant-ph2005★ 31 cited

Theory and experiment of entanglement in a quasi-phase-matched two-crystal source

Daniel Ljunggren, Maria Tengner, Philip Marsden +1

We report new results regarding a source of polarization entangled photon-pairs created by the process of spontaneous parametric downconversion in two orthogonally oriented, period…

quant-ph2005★ 21 cited

Broadcasting of entanglement at a distance using linear optics and telecloning of entanglement

Iulia Ghiu, Anders Karlsson

We propose a scheme for broadcasting entanglement at a distance based on linear optics. We show that an initial polarization entangled state can be simultaneously split and transmi…

quant-ph2005★ 16 cited

Entanglement-assisted local transformations between inequivalent classes of three-particle entangled states

Iulia Ghiu, Mohamed Bourennane, Anders Karlsson

We show that bipartite and tripartite entangled states cannot be used as catalysis states to enable local transformations inbetween inequivalent classes of three-particle entangled…

math.CO2005

Rationality of the Möbius function of a composition poset

Anders Björner, Bruce E. Sagan

We consider the zeta and Möbius functions of a partial order on integer compositions first studied by Bergeron, Bousquet-Mélou, and Dulucq. The Möbius function of this poset was de…

math-ph2005★ 3 cited

Singular factorizations, self-adjoint extensions, and applications to quantum many-body physics

Edwin Langmann, Ari Laptev, Cornelius Paufler

We study self-adjoint operators defined by factorizing second order differential operators in first order ones. We discuss examples where such factorizations introduce singular int…

math.PR2005★ 1 cited

From Gumbel to Tracy-Widom

Kurt Johansson

The Tracy-Widom distribution that has been much studied in recent years can be thought of as an extreme value distribution. We discuss interpolation between the classical extreme v…

physics.atom-ph2005★ 158 cited

Adiabatic radio frequency potentials for the coherent manipulation of matter waves

I. Lesanovsky, T. Schumm, S. Hofferberth +3

Adiabatic dressed state potentials are created when magnetic sub-states of trapped atoms are coupled by a radio frequency field. We discuss their theoretical foundations and point…