title: Damping of Bloch oscillations in the Hubbard model.
abstract: Using nonequilibrium dynamical mean-field theory, we study the isolated Hubbard model in a static electric field in the limit of weak interactions. Linear response behavior is established at long times, but only if the interaction exceeds a critical value, below which the system exhibits an ac-type response with Bloch oscillations. The transition from ac to dc response is defined in terms of the universal long-time behavior of the system, which does not depend on the initial condition.
authors: Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland.
authors: Martin
authors: M
authors: Eckstein
authors: Philipp
authors: P
authors: Werner