Manipulation of coherent atom waves using accelerated two-dimensional optical lattices
| Autor: | Ting, Wei-Chih, Han, Dian-Jiun, Wu, Shin-Tza |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | New J Phys, 12, 083059 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1367-2630/12/8/083059 |
| Popis: | We study the dynamics of Bose-Einstein condensates in accelerated two-dimensional optical square lattices by numerically solving the Gross-Pitaevskii equation. We consider the regime with negligible mean-field interactions and examine in detail the pulses of atom clouds ejected from the condensate due to Landau-Zener tunnelling. The pulses exhibit patterned structures that can be understood from the momentum-space dynamics of the condensate. Aside from conceiving realization of a pulsed two-dimensional atom laser, we demonstrate that, by exploring the band structure of the lattice, Landau-Zener tunnelling and Bragg reflection of the condensate inside the optical lattice can provide means for manipulation of coherent atom waves. Comment: Figures with low resolution; high quality ones can be supplied on request |
| Databáze: | arXiv |
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