Bloch oscillations and mean-field effects of Bose-Einstein condensates in 1-D optical lattices
Preprint
- 28 August 2001
Abstract
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. Reducing the potential depth further, Landau-Zener tunneling out of the lowest lattice band, leading to a breakdown of the oscillations, was also studied and used as a probe for the effective potential resulting from mean-field interactions as predicted by Choi and Niu [Phys. Rev. Lett. {\bf 82}, 2022 (1999)]. The effective potential was measured for various condensate densities and trap geometries, yielding good qualitative agreement with theoretical calculations.Keywords
All Related Versions
- Version 1, 2001-08-28, ArXiv
- Published version: Physical Review Letters, 87 (14), 140402.
This publication has 0 references indexed in Scilit: