Exact time evolution of space- and time-dependent correlation functions after an interaction quench in the one-dimensional Bose gas

Jorn Mossel, Jean-Sébastien Caux
2012 New Journal of Physics  
We consider the non-equilibrium dynamics of the interacting Lieb-Liniger gas after instantaneously switching the interactions off. The subsequent time evolution of the space- and time-dependent correlation functions is computed exactly. Different relaxation behavior is observed for different correlation functions. The long time average is compared with the predictions of several statistical ensembles. The generalized Gibbs ensemble restricted to a fixed number of particles is shown to give
more » ... shown to give correct results at large times for all length scales.
doi:10.1088/1367-2630/14/7/075006 fatcat:gautjieflbhfpiutcyofnhdbdq