Thermalization after an Interaction Quench in the Hubbard Model

Martin Eckstein, Marcus Kollar, and Philipp Werner
Phys. Rev. Lett. 103, 056403 – Published 29 July 2009

Abstract

We use nonequilibrium dynamical mean-field theory to study the time evolution of the fermionic Hubbard model after an interaction quench. Both in the weak-coupling and in the strong-coupling regime the system is trapped in quasistationary states on intermediate time scales. These two regimes are separated by a sharp crossover at Ucdyn=0.8 in units of the bandwidth, where fast thermalization occurs. Our results indicate a dynamical phase transition which should be observable in experiments on trapped fermionic atoms.

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  • Received 9 April 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.056403

©2009 American Physical Society

Authors & Affiliations

Martin Eckstein1, Marcus Kollar1, and Philipp Werner2

  • 1Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, 86135 Augsburg, Germany
  • 2Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland

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Issue

Vol. 103, Iss. 5 — 31 July 2009

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