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Interaction-induced decoherence of atomic Bloch oscillations

A. Buchleitner, A. R. Kolovsky

cond-mat.softarXiv:cond-mat/0305037

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.

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