arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0709.0895cond-mat.other
收藏

光致有效磁场作用下玻色-爱因斯坦凝聚体中的涡旋形核

Vortex nucleation in Bose-Einstein Condensates subject to light induced effective magnetic fields

D. R. Murray, P Öhberg, Damiá Gomila, Stephen M. Barnett

摘要:

数值模拟了有效磁场作用下玻色-爱因斯坦凝聚体中的涡旋形核。有效磁场由具有非平凡相位结构的光与BEC之间的相互作用产生,并且可以通过对光的相位和强度的适当修改来成形和控制。我们表明,成核的漩涡是种子的表面激发耦合到由一个不对称的捕获电位(类似的情况下,受机械旋转的冷凝)的不稳定性,并表明,这张照片也持有时,所施加的有效磁场是不均匀的。云中涡旋的最终形状取决于所施加场的几何形状。

英文摘要:

We numerically simulate vortex nucleation in a Bose-Einstein Condensate (BEC) subject to an effective magnetic field. The effective magnetic field is generated from the interplay between light with a non-trivial phase structure and the BEC, and can be shaped and controlled by appropriate modifications to the phase and intensity of the light. We demonstrate that the nucleation of vortices is seeded by instabilities in surface excitations which are coupled to by an asymmetric trapping potential (similar to the case of condensates subject to mechanical rotation) and show that this picture also holds when the applied effective magnetic field is not homogeneous. The eventual configuration of vortices in the cloud depends on the geometry of the applied field.

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。

↑