https://doi.org/10.1140/epjst/e2016-60383-x
Regular Article
Relaxation dynamics of two coherently coupled one-dimensional bosonic gases
1 Laboratoire de Physique Statistique (UMR 8550 CNRS), École Normale Supérieure, 75005 Paris, France
2 Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland
a e-mail: laura.foini@gmail.com
Received: 5 December 2016
Revised: 14 February 2017
Published online: 26 July 2017
In this work we consider the non-equilibrium dynamics of two tunnel coupled bosonic gases which are created from the coherent splitting of a one-dimensional gas. The consequences of the tunneling both in the non-stationary regime as well as at large time are investigated and compared with equilibrium results. In particular, within a semiclassical approximation, we compute correlation functions for the relative phase which are experimentally measurable and we observe a transient regime displaying oscillations as a function of the distance. The steady regime is very well approximated by a thermal state with a temperature independent of the tunneling strength.
© EDP Sciences, Springer-Verlag, 2017
