Nom de l’auteur/autrice :admin

François Crépin 1, Nicolas Laflorencie 1, Guillaume Roux 2, Pascal SIMON 1 Physical Review B 84 (2011) 054517 One dimensional free-fermions and hard-core bosons are often considered to be equivalent. Indeed, when restricted to nearest-neighbor hopping on a chain the particles cannot exchange themselves, and therefore hardly experience their own statistics. Apart from the off-diagonal correlations which depends on the so-called Jordan-Wigner string, […]

Kay Jörg Wiese 1, Satya N. Majumdar 2, Alberto Rosso 2 Physical Review E 83 (2011) 061141 Fractional Brownian motion is a Gaussian process x(t) with zero mean and two-time correlations ~ t^{2H} + s^{2H} – |t-s|^{2H}, where H, with 0 0 (near the absorbing boundary), while R(y) ~ y^gamma exp(-y^2/2) as y -> oo, with phi = 1 – 4

E. Bogomolny 1, O. Giraud 1 Physical Review E 84 (2011) 036212 Fractal dimensions of eigenfunctions for various critical random matrix ensembles are investigated in perturbation series in the regimes of strong and weak multifractality. In both regimes we obtain expressions similar to those of the critical banded random matrix ensemble extensively discussed in the literature. For certain ensembles,

M. Colomé-Tatché 1, D. S. Petrov 2, 3 Physical Review Letters 106 (2011) 125302 We study the response of a highly excited 1D gas with pointlike interactions to a periodic modulation of the coupling constant. We calculate the corresponding dynamic structure factors and show that their low-frequency behavior differs dramatically for integrable and nonintegrable models. Nonintegrable systems are sensitive to

Marc Mezard 1, Giorgio Parisi 2, Marco Tarzia 3, Francesco Zamponi 4 Journal of statistical mechanics-theory and experiment (2011) P03002 We discuss the analytical solution through the cavity method of a mean field model that displays at the same time an ideal glass transition and a set of jamming points. We establish the equations describing this system, and we discuss some approximate analytical

Forrester, P.J., Majumdar, S.N., Schehr, G. Nuclear Physics B844 (2011) 500-526

V. Garzo 1, E. Trizac 2 Europhysics Letters 94, 5 (2011) 50009 The dynamics of an impurity (or tracer particle) immersed in a dilute granular gas under uniform shear flow is investigated. A non-equilibrium phase transition is identified from an exact solution of the inelastic Boltzmann equation for a granular binary mixture in the tracer limit, where the impurity

Matthias Krüger 1, Thorsten Emig 2, Mehran Kardar 1 Physical Review Letters 106 (2011) 210404 The Casimir force between arbitrary objects in equilibrium is related to scattering from individual bodies. We extend this approach to heat transfer and Casimir forces in non-equilibrium cases where each body, and the environment, is at a different temperature. The formalism tracks the radiation from each

Matthias Krüger 1, Thorsten Emig 2, Giuseppe Bimonte 3, Mehran Kardar 1 Europhysics Letters 95, 2 (2011) 21002 We discuss non-equilibrium extensions of the Casimir force (due to electromagnetic fluctuations), where the objects as well as the environment are held at different temperatures. While the formalism we develop is quite general, we focus on a sphere in front of a plate, as well

Guillaume Roux 1, Evgeni Burovski 2, Thierry Jolicoeur 1 Physical Review A: Atomic, Molecular and Optical Physics 83 (2011) 053618 We consider two-component one-dimensional quantum gases at special imbalanced commensurabilities which lead to the formation of multimer (multi-particle bound-states) as the dominant order parameter. Luttinger liquid theory supports a mode-locking mechanism in which mass (or velocity) asymmetry is identified as the