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arXiv 1804.08486cond-mat.quant-gas
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玻色-爱因斯坦凝聚体中巨涡旋的三维分裂动力学

Three-dimensional splitting dynamics of giant vortices in Bose-Einstein condensates

Jukka Räbinä, Pekko Kuopanportti, Markus Kivioja, Mikko Möttönen, Tuomo Rossi

摘要:

通过数值积分三维Gross-Pitaevskii方程,研究了稀玻色-爱因斯坦凝聚体中巨涡旋的分裂动力学.在空间离散中,利用四面体拼接的优点,减小了误差,提高了数值方法的可靠性。广泛的调查涡旋分裂对称性提出了不同的纵横比的谐波捕获势。在模拟动力学中观察到的分裂模式的对称性被发现是在良好的协议与通过解决相应的Bogoliubov方程的主导动力学不稳定性所获得的预测。此外,我们观察到分裂涡在扁长凝聚体中的交织和分裂和复苏的现象在一个球形凝聚体。

英文摘要:

We study the splitting dynamics of giant vortices in dilute Bose-Einstein condensates by numerically integrating the three-dimensional Gross-Pitaevskii equation in time. By taking advantage of tetrahedral tiling in the spatial discretization, we decrease the error and increase the reliability of the numerical method. An extensive survey of vortex splitting symmetries is presented for different aspect ratios of the harmonic trapping potential. The symmetries of the splitting patterns observed in the simulated dynamics are found to be in good agreement with predictions obtained by solving the dominant dynamical instabilities from the corresponding Bogoliubov equations. Furthermore, we observe intertwining of the split vortices in prolate condensates and a split-and-revival phenomenon in a spherical condensate.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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