Collective excitations of a trapped Bose-Einstein condensate in the presence of weak disorder and a two-dimensional optical lattice
文献类型：期刊论文
| 作者 | Y. Hu ; Z. X. Liang ; B. B. Hu |
| 刊名 | Physical Review A
 |
| 出版日期 | 2010 |
| 卷号 | 81期号:5 |
| 关键词 | elementary excitations ground-state gas spectrum |
| ISSN号 | 1050-2947 |
| 中文摘要 | We investigate the combined effects of weak disorder and a two-dimensional (2D) optical lattice on the collective excitations of a harmonically trapped Bose-Einstein condensate (BEC) at zero temperature. Accordingly, we generalize the hydrodynamic equations of superfluid for a weakly interacting Bose gas in a 2D optical lattice to include the effects of weak disorder. Our analytical results for the collective frequencies beyond the mean-field approximation reveal the peculiar role of disorder, interplaying with the 2D optical lattice and interatomic interaction, on elementary excitations along the 3D to 1D crossover. In particular, consequences of disorder on the phonon propagation and surface modes are analyzed in detail. The experimental scenario is also proposed. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31163]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Y. Hu,Z. X. Liang,B. B. Hu. Collective excitations of a trapped Bose-Einstein condensate in the presence of weak disorder and a two-dimensional optical lattice[J]. Physical Review A,2010,81(5). |
| APA | Y. Hu,Z. X. Liang,&B. B. Hu.(2010).Collective excitations of a trapped Bose-Einstein condensate in the presence of weak disorder and a two-dimensional optical lattice.Physical Review A,81(5). |
| MLA | Y. Hu,et al."Collective excitations of a trapped Bose-Einstein condensate in the presence of weak disorder and a two-dimensional optical lattice".Physical Review A 81.5(2010). |
入库方式： OAI收割
来源：金属研究所
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