Manipulation of matter waves using Bloch and Bloch-Zener oscillations

We present theoretical and numerical results on the dynamics of ultracold atoms in an accelerated single- and double-periodic optical lattice. In the single-periodic potential Bloch oscillations can be used to generate fast directed transport with very little dispersion. The dynamics in the double-periodic system is dominated by Bloch-Zener oscillations, i.e. the interplay of Bloch oscillations and Zener tunneling between the subbands. Apart from directed transport, the latter system permits various interesting applications, such as widely tunable matter wave beam splitters and Mach-Zehnder interferometry. As an application, a method for efficient probing of small nonlinear mean-field interactions is suggested. PACS numbers: 03.65.-w, 03.75.Be, 03.75.Dg, 03.75.LmManipulation of matter waves using Bloch and Bloch-Zener oscillations 2 1.