title: Interaction-induced decoherence of atomic BLOCH oscillations.
abstract: We show that the energy spectrum of the Bose-Hubbard model amended by a static field exhibits Wigner-Dyson level statistics. In itself a characteristic signature of quantum chaos, this induces the irreversible decay of Bloch oscillations of cold, interacting atoms loaded into an optical lattice, and provides a Hamiltonian model for interaction-induced decoherence.
authors.affiliation: Max-Planck-Institut für Physik komplexer Systeme, D-01187 Dresden, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Buchleitner
authors.forename: Andrey R
authors.initials: AR
authors.lastname: Kolovsky