Splitting of a doubly quantized vortex through intertwining in Bose-Einstein condensates
Splitting of a doubly quantized vortex through intertwining in Bose-Einstein condensates
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通过玻色-爱因斯坦凝聚中的缠绕来分裂双量子化涡旋
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
K. Machida
中科院分区：
文献类型：
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作者：
M. Mottonen;T. Mizushima;T. Isoshima;M. Salomaa;K. Machida
研究了{sup 23}Na的稀玻色-爱因斯坦凝聚中双量子化涡旋在零温下的稳定性。计算了雪茄形凝聚体的Bogoliubov方程的本征模谱，发现双量子化涡旋在分裂成两个单量子化涡旋时是谱不稳定的.通过数值求解全三维含时Gross-Pitaevskii方程，发现两个单量子化涡旋在衰减前是交错的。这项工作提供了一个解释最近的实验[A. E. Leanhardt等人，物理修订信函89，190403（2002）]。
The stability of doubly quantized vortices in dilute Bose-Einstein condensates of {sup 23}Na is examined at zero temperature. The eigenmode spectrum of the Bogoliubov equations for a harmonically trapped cigar-shaped condensate is computed and it is found that the doubly quantized vortex is spectrally unstable towards division into two singly quantized vortices. By numerically solving the full three-dimensional time-dependent Gross-Pitaevskii equation, it is found that the two singly quantized vortices intertwine before decaying. This work provides an interpretation of recent experiments [A. E. Leanhardt et al., Phys. Rev. Lett. 89, 190403 (2002)].