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Self-trapping of Bose-Einstein condensates in optical lattices

Bingbing Wang·Panming Fu·Jie Liu·Biao Wu
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Abstract

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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Bingbing Wang, Panming Fu, Jie Liu, Biao Wu. 2006-01-12. Self-trapping of Bose-Einstein condensates in optical lattices. https://doi.org/10.1103/physreva.74.063610

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