Phys. Rev. Lett. 100, 120404 (2008) [4 pages]Nonthermal Steady States after an Interaction Quench in the Falicov-Kimball ModelReceived 20 July 2007; revised 2 October 2007; published 27 March 2008 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 ℏ/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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.120404
DOI:
10.1103/PhysRevLett.100.120404
PACS:
05.30.Fk, 03.75.Ss, 71.27.+a
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