Dynamical evolution of a doubly quantized vortex imprinted in a Bose-Einstein condensate
Dynamical evolution of a doubly quantized vortex imprinted in a Bose-Einstein condensate
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DOI：
10.1103/physrevlett.97.180409
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发表时间：
2006-11-03
影响因子：
8.6
通讯作者：
Delgado, V.
中科院分区：
文献类型：
--
作者：
Munoz Mateo, A.;Delgado, V.
Shin等人最近的实验[Phys. Rev. Lett. 93，160406（2004）]对双量子化涡旋衰变的研究，通过数值求解Gross-Pitaevskii方程，分析了双量子化涡旋的衰变过程。我们的结果表明，涡旋衰减主要是动力学不稳定性的后果。在涡旋寿命中观察到的单调增加是这样一个事实的结果，即测得的寿命包括初始扰动到达中央切片所需的时间。当局部考虑时，分裂在每个凝聚体中近似同时发生。
The recent experiment by Shin et al. [Phys. Rev. Lett. 93, 160406 (2004)] on the decay of a doubly quantized vortex is analyzed by numerically solving the Gross-Pitaevskii equation. Our results demonstrate that the vortex decay is mainly a consequence of dynamical instability. The monotonic increase observed in the vortex lifetimes is a consequence of the fact that the measured lifetimes incorporate the time it takes for the initial perturbation to reach the central slice. When considered locally, the splitting occurs approximately at the same time in every condensate.