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arXiv 1611.09552cond-mat.quant-gasphysics.optics
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在人工磁场中产生超流涡环

Creating superfluid vortex rings in artificial magnetic fields

Rashi Sachdeva, Thomas Busch

摘要:

人工规范场是影响玻色-爱因斯坦凝聚体中超冷原子动力学的通用工具。在这里,我们讨论了一种方法的人工规范场产生源于倏逝场的弯曲表面的纳米光纤。指数衰减的倏逝场导致广义拉比频率的大梯度,因此几何矢量和标量势的存在。通过求解Gross-Pitaevskii方程中存在的人工规范场起源于基本HE $_{11}$模式的纤维,我们表明,涡环可以在一个控制的方式创建。我们还计算了由高阶HE $_{21}$,TE $_{01}$和TM $_{01}$模式产生的磁场,并将其与基本HE $_{11}$模式进行比较。

英文摘要:

Artificial gauge fields are versatile tools that allow to influence the dynamics of ultracold atoms in Bose-Einstein condensates. Here we discuss a method of artificial gauge field generation stemming from the evanescent fields of the curved surface of an optical nanofibre. The exponential decay of the evanescent fields leads to large gradients in the generalized Rabi frequency and therefore to the presence of geometric vector and scalar potentials. By solving the Gross-Pitaevskii equation in the presence of the artificial gauge fields originating from the fundamental HE$_{11}$ mode of the fibre, we show that vortex rings can be created in a controlled manner. We also calculate the magnetic fields resulting from the higher order HE$_{21}$, TE$_{01}$, and TM$_{01}$ modes and compare them to the fundamental HE$_{11}$ mode.

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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