Coherent acceleration and Landau-Zener tunneling of Bose-Einstein condensates in 1-D optical lattices

Details Coherent acceleration and Landau-Zener tunneling of Bose-Einstein condensates in 1-D optical lattices Coherent acceleration and Landau-Zener tunneling of Bose-Einstein condensates in 1-D optical lattices

2001-03-22

arxiv.org/abs/cond-mat/0103466v1

Physics

Condensed Matter

5 pages, 4 figures

Scientific paper

We have loaded Bose-Einstein condensates into one-dimensional, off-resonant optical lattices and accelerated them by chirping the frequency difference between the two lattice beams. For small values of the lattice well-depth, Bloch oscillations were observed. Landau-Zener tunneling out of the lowest lattice band, leading to a breakdown of the oscillations, was also studied. In order to allow in-trap measurements of these phenomena, we dynamically compensated for the intrinsic micromotion of the atoms in our time-orbiting potential trap.

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