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quant-ph2006★ 11 cited

Entanglement in the dispersive interaction of trapped ions with a quantized field

F. L. Semião, K. Furuya

The mode-mode entanglement between trapped ions and cavity fields is investigated in the dispersive regime. We show how a simple initial preparation of Gaussian coherent states and…

math.PR2006★ 69 cited

Billiards in a general domain with random reflections

Francis Comets, Serguei Popov, Gunter Schütz +1

We study stochastic billiards on general tables: a particle moves according to its constant velocity inside some domain until it hits the bound…

gr-qc2006★ 1 cited

Shortcuts in particle production in a toroidal compactified spacetime

Julio M. Hoff da Silva, Roldao da Rocha

We investigate the particle production in a toroidal compactified spacetime due to the expansion of a Friedmann cosmological model in R3 x S1 outside a U(1) local cosmic string. Th…

cond-mat.str-el2006★ 95 cited

Oscillating Nernst-Ettingshausen effect in Bismuth across the quantum limit

Kamran Behnia, Marie-Aude Measson, Yakov Kopelevich

In elemental Bismuth, 10 atoms share a single itinerant electron. Therefore, a moderate magnetic field can confine electrons to the lowest Landau level. We report on the first…

hep-ph2006★ 11 cited

Second-order corrections to neutrino two-flavor oscillation parameters in the wave packet approach

Alex E. Bernardini, Marcelo M. Guzzo, Fernando R. Torres

We report about an analytic study involving the {\em intermediate} wave packet formalism for quantifying the physically relevant information which appear in the neutrino two-flavor…

hep-ph2006★ 4 cited

The construction of Dirac wave packets for a fermionic particle non-minimally coupling with an external magnetic field

Alex E. Bernardini

We shall proceed with the construction of normalizable Dirac wave packets for {\em fermionic} particles (neutrinos) with dynamics governed by a ``modified'' Dirac equation with a n…

hep-ph2006★ 10 cited

The charmonium and bottomonium mass spectroscopy with a simple approximaton of the kinetic term

Alex E. Bernardini, C. Dobrigikeit

In this paper we propose a particular description of meson spectroscopy, with emphasis in heavy bound states like charmonia and bottomonia, after working on the main aspects of the…

math-ph2006★ 11 cited

Quaternionic Diffusion by a Potential Step

Stefano De Leo, Gisele C. Ducati

In looking for qualitative differences between quaternionic and complex formulations of quantum physical theories, we provide a detailed discussion of the behavior of a wave packet…

math.RA2006

Zeros of Unilateral Quaternionic Polynomials

Stefano De Leo, Gisele Ducati, Vinicius Leonardi

The purpose of this paper is to show how the problem of finding the zeros of unilateral n-order quaternionic polynomials can be solved by determining the eigen-vectors of the corre…

cond-mat.str-el2006★ 100 cited

Nernst effect in semi-metals: the meritorious heaviness of electrons

Kamran Behnia, Marie-Aude Measson, Yakov Kopelevich

We present a study of electric, thermal and thermoelectric transport in elemental Bismuth, which presents a Nernst coefficient much larger than what was found in correlated metals.…

physics.ao-ph2006★ 16 cited

On the Roles of the Secondary Circulation in the Formation of Hurricanes

Chanh Q. Kieu

Secondary circulations (SC) associated with hurricanes are traditionally regarded as small perturbations superimposed on the primary circulations (PC). The reason behind this treat…

physics.atom-ph2006★ 16 cited

Coherent Quantum Engineering of Free-Space Laser Cooling

Josh W. Dunn, J. W. Thomsen, Chris H. Greene +1

We perform a quantitative analysis of the cooling dynamics of three-level atomic systems interacting with two distinct lasers. Employing sparse-matrix techniques, we find numerical…

hep-ex2006★ 92 cited

Measurement of the rare decay pi0 -> e+ e-

E. Abouzaid

The branching ratio of the rare decay pi0 -> e+ e- has been measured precisely, using the complete data set from the KTeV E799-II experiment at Fermilab. We observe 794 candidate p…

cond-mat.str-el2006★ 9 cited

First order quantum phase transitions

M. A. Continentino, A. S. Ferreira

Quantum phase transitions have been the subject of intense investigations in the last two decades [1]. Among other problems, these phase transitions are relevant in the study of he…

gr-qc2006★ 47 cited

Quasinormal modes for the Vaidya metric

Elcio Abdalla, Cecilia B. M. H. Chirenti, Alberto Saa

We consider here scalar and electromagnetic perturbations for the Vaidya metric in double-null coordinates. Such an approach allows one to go a step further in the analysis of quas…

hep-ph2006★ 42 cited

Study of the effect of neutrino oscillations on the supernova neutrino signal in the LVD detector

N. Yu. Agafonova, M. Aglietta, P. Antonioli +27

The LVD detector, located in the INFN Gran Sasso National Laboratory (Italy), studies supernova neutrinos through the interactions with protons and carbon nuclei in the liquid scin…

cond-mat.mtrl-sci2006★ 47 cited

Ferromagnetism and Superconductivity in Carbon-Based Systems

Y. Kopelevich, P. Esquinazi

In this article we shortly review previous and recently published experimental results that provide evidence for intrinsic, magnetic-impurity-free ferromagnetism and for high-tempe…

cond-mat.mtrl-sci2006★ 207 cited

Correlation between magnetism and magnetocaloric effect in RCo2-based Laves phase compounds

Niraj K. Singh, K. G. Suresh, A. K. Nigam +3

By virtue of the itinerant electron metamagnetism (IEM), the RCo2 compounds with R=Er, Ho and Dy are found to show first order magnetic transition at their ordering temperatures. T…

physics.acc-ph2006★ 21 cited

Beam-Based Alignment of the NuMI Target Station Components at FNAL

R. Zwaska, M. Bishai, S. Childress +15

The Neutrinos at the Main Injector (NuMI) facility is a conventional horn-focused neutrino beam which produces muon neutrinos from a beam of mesons directed into a long evacuated d…

math-ph2006★ 35 cited

Analytic Plane Wave Solutions for the Quaternionic Potential Step

Stefano De Leo, Gisele C. Ducati, Tiago M. Madureira

By using the recent mathematical tools developed in quaternionic differential operator theory, we solve the Schroedinger equation in presence of a quaternionic step potential. The…

hep-ph2006★ 46 cited

Probing long-range leptonic forces with solar and reactor neutrinos

M C Gonzalez-Garcia, P C~de Holanda, E Masso +1

In this work we study the phenomenological consequences of the existence of long-range forces coupled to lepton flavour numbers in solar neutrino oscillations. We study electronic…

physics.chem-ph2006★ 22 cited

Classical kinetic energy, quantum fluctuation terms and kinetic-energy functionals

I. P. Hamilton, Ricardo A. Mosna, L. Delle Site

We employ a recently formulated dequantization procedure to obtain an exact expression for the kinetic energy which is applicable to all kinetic-energy functionals. We express the…

math-ph2006★ 12 cited

Nonsingular solutions of Hitchin's equations for noncompact gauge groups

Ricardo A. Mosna, Marcos Jardim

We consider a general ansatz for solving the 2-dimensional Hitchin's equations, which arise as dimensional reduction of the 4-dimensional self-dual Yang-Mills equations, with remar…

cond-mat.mes-hall2006★ 107 cited

Dirac and Normal Fermions in Graphite and Graphene: Implications to the Quantum Hall Effect

Igor A. Luk'yanchuk, Yakov Kopelevich

Spectral analysis of Shubnikov de Haas (SdH) oscillations of magnetoresistance and of Quantum Hall Effect (QHE) measured in quasi-2D highly oriented pyrolytic graphite (HOPG) [Phys…