Nonthermal Steady States after an Interaction Quench in the Falicov-Kimball Model

Journal Article · Fri Mar 28 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.120404· OSTI ID:21123773

Eckstein, Martin; Kollar, Marcus ^[1]

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1. Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, 86135 Augsburg (Germany)

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 ({Dirac_h}/2{pi})/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.

• OSTI ID: 21123773
• Journal Information: Physical Review Letters, Vol. 100, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.100.120404; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EXACT SOLUTIONS
INTERACTIONS
MATHEMATICAL MODELS
MEAN-FIELD THEORY
STEADY-STATE CONDITIONS