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arXiv 1802.09347cond-mat.quant-gas
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受搅拌的玻色-爱因斯坦凝聚体的表面激发、形状变形和长时间行为

Surface excitations, shape deformation and the long-time behavior in a stirred Bose-Einstein condensate

Qing-Li Zhu, Jin An

摘要:

研究了高扁玻色-爱因斯坦凝聚体中高斯障碍势旋转时的表面激发、形状形变和持续电流的形成.即使搅拌梁运动缓慢,也会在搅拌器中心产生并捕获涡旋偶极子。当障碍物的角速度大于某一临界值时,由于大量表面波激励的存在,凝聚体的形状会随着旋转频率的变化而发生显著的变形。在足够长的时间之后,发现一些涡旋被留在冷凝物中或被障碍物钉扎,一个涡旋偶极子或几个涡旋可以被捕获在光束中心,这使得涡旋操纵成为可能。

英文摘要:

The surface excitations, shape deformation and the formation of persistent current for a Gaussian obstacle potential rotating in an highly oblate Bose-Einstein condensate(BEC)are investigated. Vortex dipole can be produced and trapped in the center of the stirrer even for slow motion of the stirring beam. When the barrier angular velocity is above some critical value, the condensate shape can be deformed remarkably according to the rotation frequency due to the existence of plenty of surface wave excitations. After a long enough time, a few vortices are found to be left either trapped in the condensate or pinned by the obstacle, a vortex dipole or several vortices can be trapped at the beam center, which enables the possibility of vortex manipulation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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