Bloch Oscillations and Mean-Field Effects of Bose-Einstein Condensates in 1D Optical Lattices

2001/08/28 by O. Morsch, J. H. Müller, Matteo Cristiani +3 · 23 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Nonlinear Photonic Systems #Strong Light-Matter Interactions #cond-mat.soft

paper · pdf · doi:10.1103/physrevlett.87.140402

published as Phys. Rev. Lett. 87, art. no. 140402 · 5 pages, 3 figures; accepted for publication in Physical Review Letters

arxiv created 2001/08/28 · openalex publication_date 2001/09/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

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. 82, 2022 (1999)]. The effective potential was measured for various condensate densities and trap geometries, yielding good qualitative agreement with theoretical calculations.

Citations

• Time-dependent tunneling of Bose-Einstein condensates

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