Nom de l’auteur/autrice :admin

Giuliano Orso 1, Evgeni Burovski 1, Thierry Jolicoeur 1 Physical Review Letters, 104 (2010) 065301 We investigate one dimensional attractive Fermi gases in spin-dependent optical lattices. Starting from the asymmetric Hubbard model, we show that three-body bound states – « trimers » – exist as soon as the two tunneling rates are different. We calculate the binding energy and the effective mass of […]

Mathias Albert 1, Patricio Leboeuf 1 Physical Review A: Atomic, Molecular and Optical Physics 81 (2010) 013614 The one-dimensional propagation of waves in a bichromatic potential may be modeled by the Aubry-André Hamiltonian. The latter presents a delocalization-localization transition, which has been observed in recent experiments using ultracold atoms or light. It is shown here that, in contrast to

Jérôme Roccia 1, Patricio Leboeuf 2 Physical Review C 81 (2010) 044301 We investigate the many-body level density of gas of non-interacting fermions. We determine its behavior as a function of the temperature and the number of particles. As the temperature increases, and beyond the usual Sommerfeld expansion that describes the degenerate gas behavior, corrections due to a finite

A. Pikovski 1, M. Klawunn 1, 2, G. V. Shlyapnikov 3, 4, L. M.N.B.F. Santos 1 Physical Review Letters 105 (2010) 215302 We consider fermionic polar molecules in a bilayer geometry where they are oriented perpendicularly to the layers, which permits both low inelastic losses and superfluid pairing. The dipole-dipole interaction between molecules of different layers leads to the emergence of interlayer superfluids. The superfluid regimes

Satya N. Majumdar 1, Alberto Rosso 1, Andrea Zoia 2 Physical Review Letters 104 (2010) 020602 We present the universal features of the hitting probability $Q(x,L)$, the probability that a generic stochastic process starting at $x$ and evolving in a box $[0,L]$ hits the upper boundary $L$ before hitting the lower boundary at 0. For a generic self-affine process (describing, for

O. Giraud 1, K. Thas 2 Reviews of Modern Physics 82 (2010) 2213-2255 In a celebrated paper  »Can one hear the shape of a drum? » M. Kac [Amer. Math. Monthly 73, 1 (1966)] asked his famous question about the existence of nonisometric billiards having the same spectrum of the Laplacian. This question was eventually answered positively in 1992 by

H. Nonne 1, P. Lecheminant 1, Sylvain Capponi 2, G. Roux 3, E. Boulat 4 Physical Review B 81 (2010) 020408 R A Haldane conjecture is revealed for spin-singlet charge modes in 2N-component fermionic cold atoms loaded into one-dimensional optical lattice. By means of a low-energy approach and DMRG calculations, we show the emergence of gapless and gapped phases depending on the parity of N

Pierre Carmier 1, Caio Lewenkopf 2, Denis Ullmo 1 Physical Review B 81 (2010) 241406 We provide a semiclassical description of the electronic transport through graphene n-p junctions in the quantum Hall regime. A semiclassical approximation for the conductance is derived in terms of the various snake-like trajectories at the interface of the junction. For a symmetric (ambipolar) configuration, the general

Areejit Samal 1, 2, 3, Joao F. Matias Rodrigues 4, Jürgen Jost 1, 5, Olivier C. Martin 2, 6, Andreas Wagner 4, 5, 7, 8 BMC Biology 4 (2010) 30 Background: A metabolic genotype comprises all chemical reactions an organism can catalyze via enzymes encoded in its genome. A genotype is viable in a given environment if it is capable of producing all biomass components the organism needs to survive and reproduce.

Yan V Fyodorov 1, Pierre Le Doussal 2, Alberto Rosso 3 Europhysics Letters (EPL) 90 (2010) 60004 We reveal a phase transition with decreasing viscosity $\nu$ at \nu=\nu_c>0 in one-dimensional decaying Burgers turbulence with a power-law correlated random profile of Gaussian-distributed initial velocities 1. School of Mathematical Sciences, University of Nottingham 2. Laboratoire de Physique Théorique de l’ENS (LPTENS), CNRS :