2011

Jean-Sebastien Bernier 1, Guillaume Roux 2, Corinna Kollath 1, 3 Physical Review Letters 106 (2011) 200601 We analyze the effect of a linear time-variation of the interaction strength on a trapped one-dimensional Bose gas confined to an optical lattice. The evolution of different observables such as the experimentally accessible onsite particle distribution are studied as a function of the ramp time using […]

Pierre Le Doussal 1, Alberto Rosso 2, Kay Jörg Wiese 1 Europhysics Letters 96, 1 (2011) 14005 We conjecture the exact shock statistics in the inviscid decaying Burgers equation in D>1 dimensions, with a special class of correlated initial velocities, which reduce to Brownian for D=1. The prediction is based on a field-theory argument, and receives support from our numerical calculations.

Pierre Carmier 1, 2, Caio Lewenkopf 3, Denis Ullmo 1 Physical Review B 84 (2011) 195428 We provide a semiclassical description of the electronic transport through graphene n-p junctions in the quantum Hall regime. This framework is known to experimentally exhibit conductance plateaus whose origin is still not fully understood. In the magnetic regime (E < vF B), we show the conductance

Michele Castellana 1, 2, Elia Zarinelli 1 Physical Review B 84 (2011) 144417 We investigate the finite-size fluctuations due to quenched disorder of the critical temperature of the Sherrington-Kirkpatrick spin glass. In order to accomplish this task, we perform a finite-size analysis of the spectrum of the susceptibility matrix obtained via the Plefka expansion. By exploiting results from random matrix

Castellana, M., Parisi, G. Physical Review E83 (2011) 041134

Michele Castellana 1, 2 Europhysics Letters 95, 4 (2011) 47014 A real space Renormalization Group approach is presented for a non-mean field spin-glass. This approach has been conceived in the effort to develop an alternative method to the Renormalization Group approaches based on the replica method. Indeed, non-perturbative effects in the latter are quite generally out of control,

Areejit Samal 1, 2, Olivier C. Martin 2, 3 PLoS ONE 6 (2011) e22295 Networks coming from protein-protein interactions, transcriptional regulation, signaling, or metabolism may appear to have ‘unusual’ properties. To quantify this, it is appropriate to randomize the network and test the hypothesis that the network is not statistically different from expected in a motivated ensemble. However, when dealing with

N. D. Drummond 1, 2, N. R. Cooper 1, R. J. Needs 1, G. V. Shlyapnikov 3, 4 Physical Review B 83 (2011) 195429 Motivated by potential realizations in cold-atom or cold-molecule systems, we have performed quantum Monte Carlo simulations of two-component gases of fermions in two dimensions with hard-core interactions. We have determined the gross features of the zero-temperature phase diagram, by investigating the

Shlyapnikov, G.V., Tsvelik, A.M. New Journal of Physics13 (2011) 065012

G. V. Shlyapnikov 1, A. M. Tsvelik 2 New Journal of Physics 13 (2011) 065012 Spinor ultracold gases in one dimension represent an interesting example of strongly correlated quantum fluids. They have a rich phase diagram and exhibit a variety of quantum phase transitions. We consider a one-dimensional spinor gas of bosons with a large spin $S$. A particular