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65

Sep 23, 2013
09/13

by
Valerie J. Mikles; Peggy Varniere; Stephen S. Eikenberry; Jerome Rodriguez; Dave Rothstein

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It is widely believed that the low frequency quasi-periodic X-ray oscillations observed in microquasars are correlated to, but do not originate at, the physical radius of the inner edge of the accretion disk. Models relating the QPO frequency and color radius are hindered by observations showing contradicting trend correlations between the microquasars GRO 1655-40, XTE J1550-564 and GRS 1915+105. The first shows a negative correlation and the latter two a positive one. By taking into account...

Source: http://arxiv.org/abs/0903.2680v1

31
31

Sep 23, 2013
09/13

by
Hichem Hajaiej

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We prove the uniqueness of the maximizers of a Hardy-Littlewood type functional under constraints. We also establish a quantitative stability estimate. Introduction

Source: http://arxiv.org/abs/0903.2826v1

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39

Sep 23, 2013
09/13

by
S. Gandolfi; A. Yu. Illarionov; K. E. Schmidt; F. Pederiva; S. Fantoni

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We calculate the equation of state of neutron matter at zero temperature by means of the auxiliary field diffusion Monte Carlo method (AFDMC) combined with a fixed-phase approximation. The calculation of the energy is carried out by simulating up to 114 neutrons in a periodic box. Special attention was made to reduce finite size effects at the energy evaluation by adding to the interaction the effect due to the truncation of the simulation box, and by performing several simulations using...

Source: http://arxiv.org/abs/0903.2610v1

131
131

Sep 23, 2013
09/13

by
A. Iucci; M. A. Cazalilla

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The dynamics of the Luttinger model and the sine-Gordon model (at the Luther-Emery point and in the semiclassical approximation) after a quantum quench is studied. We compute in detail one and two-point correlation functions for different types of quenches: from a non-interacting to an interacting Luttinger model and vice-versa, and from the gapped to the gapless phase of the sine-Gordon model and vice-versa. A progressive destruction of the Fermi gas features in the momentum distribution is...

Source: http://arxiv.org/abs/0903.1205v2

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29

Sep 23, 2013
09/13

by
M. Ortner; A. Micheli; G. Pupillo; P. Zoller

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In this paper we study the realization of lattice models in mixtures of atomic and dipolar molecular quantum gases. We consider a situation where polar molecules form a self-assembled dipolar lattice, in which atoms or molecules of a second species can move and scatter. We describe the system dynamics in a master equation approach in the Brownian motion limit of slow particles and fast phonons, which we find appropriate for our system. In a wide regime of parameters, the reduced dynamics of the...

Source: http://arxiv.org/abs/0903.2710v1