title: New bloch period for interacting cold atoms in 1D optical lattices.
abstract: This paper studies Bloch oscillations of ultracold atoms in an optical lattice, in the presence of atom-atom interactions. A new, interaction-induced Bloch period is identified. Analytical results are corroborated by realistic numerical calculations.
authors.affiliation: Max-Planck-Institut für Physik Komplexer Systeme, D-01187 Dresden, Germany.
authors.forename: Andrey R
authors.initials: AR
authors.lastname: Kolovsky