Self-trapping of Bose-Einstein condensates in optical lattices

Details Self-trapping of Bose-Einstein condensates in optical lattices Self-trapping of Bose-Einstein condensates in optical lattices

2006-01-12

arxiv.org/abs/cond-mat/0601249v1

Phys. Rev. A 74, 063610 (2006)

Physics

Condensed Matter

Other Condensed Matter

8 pages, 15 figures

Scientific paper

10.1103/PhysRevA.74.063610

The self-trapping phenomenon of Bose-Einstein condensates (BECs) in optical lattices is studied extensively by numerically solving the Gross-Pitaevskii equation. Our numerical results not only reproduce the phenomenon that was observed in a recent experiment [Anker {\it et al.}, Phys. Rev. Lett. {\bf 94} (2005)020403], but also find that the self-trapping breaks down at long evolution times, that is, the self-trapping in optical lattices is only temporary. The analysis of our numerical results shows that the self-trapping in optical lattices is related to the self-trapping of BECs in a double-well potential. A possible mechanism of the formation of steep edges in the wave packet evolution is explored in terms of the dynamics of relative phases between neighboring wells.

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