Nonthermal steady states after an interaction quench in the Falicov-Kimball model.
We present the exact solution of the Falicov-Kimball model after a sudden change of its interaction parameter using nonequilibrium dynamical mean-field theory. For different interaction quenches between the homogeneous metallic and insulating phases the system relaxes to a nonthermal steady state on time scales on the order of variant Planck's over 2pi/bandwidth, showing collapse and revival with an approximate period of h/interaction if the interaction is large. We discuss the reasons for this behavior and provide a statistical description of the final steady state by means of generalized Gibbs ensembles.
Eckstein
Martin
M
Institute for Physics, University of Augsburg, 86135 Augsburg, Germany.
Kollar
Marcus
M