Creating superfluid vortex rings in artificial magnetic fields
Creating superfluid vortex rings in artificial magnetic fields
复制标题
在人工磁场中创建超流体涡环
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
T. Busch
中科院分区：
文献类型：
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作者：
R. Sachdeva;T. Busch
人工规范场是一种多功能工具，可以用来影响玻色-爱因斯坦凝聚体中超冷原子的动力学。在这里，我们讨论了一种由纳米光纤曲面上的逝去场产生人工规范场的方法。衰减场的指数衰减导致广义拉比频率的大梯度，从而导致几何矢量势和标量势的存在。通过求解存在人工规范场的Gross-Pitaevskii方程，我们证明了涡旋环可以以一种受控的方式产生。我们还计算了高阶HE$_{21}$、TE$_{01}$和TM$_{01}$模式产生的磁场，并将它们与基本HE${11}$模式进行了比较。
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.