Huhtamäki J A M, Möttönen M, Isoshima T, Pietilä V, Virtanen S M M
Laboratory of Physics, Helsinki University of Technology, P.O. Box 4100, FI-02015 TKK, Finland.
Phys Rev Lett. 2006 Sep 15;97(11):110406. doi: 10.1103/PhysRevLett.97.110406. Epub 2006 Sep 13.
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)10.1103/PhysRevLett.93.160406]. 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.
最近，在稀薄的原子雪茄形玻色-爱因斯坦凝聚体中，对通过拓扑方法产生的双量子化涡旋分裂为两个单量子化涡旋的现象进行了实验研究[Y. Shin，《物理评论快报》93，160406 (2004)10.1103/PhysRevLett.93.160406]。特别地，研究了分裂时间对峰值粒子密度的依赖性。我们给出了紧密模拟实验装置的理论模拟结果。我们表明，仅重力下陷和捕获势的时间依赖性的组合就足以在与实验高度一致的时间尺度内分裂双量子化涡旋。
