Splitting times of doubly quantized vortices in dilute Bose-Einstein condensates
Splitting times of doubly quantized vortices in dilute Bose-Einstein condensates
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DOI：
10.1103/physrevlett.97.110406
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发表时间：
2006-09-15
影响因子：
8.6
通讯作者：
Virtanen, S. M. M.
中科院分区：
文献类型：
--
作者：
Huhtamaki, J. A. M.;Mottonen, M.;Virtanen, S. M. M.
最近，在稀疏原子雪茄状玻色-爱因斯坦凝聚中，实验研究了拓扑产生的双量子化涡旋分裂为两个单量子化涡旋[Y. Shin，Phys. Rev. Lett. 93，160406（2004）]。特别地，研究了分裂时间对峰值颗粒密度的依赖性。我们提出的理论模拟结果，密切模仿实验装置。我们表明，引力垂度和时间依赖性的组合的捕获势单独足以分裂的时间尺度，这是在良好的协议与实验的双量子化涡旋。
Recently, the splitting of a topologically created doubly quantized vortex into two singly quantized vortices was experimentally investigated in dilute atomic cigar-shaped Bose-Einstein condensates [Y. Shin , Phys. Rev. Lett. 93, 160406 (2004)]. In particular, the dependency of the splitting time on the peak particle density was studied. We present results of theoretical simulations which closely mimic the experimental setup. We show that the combination of gravitational sag and time dependency of the trapping potential alone suffices to split the doubly quantized vortex in time scales which are in good agreement with the experiments.