Kármán vortex street in spin-1 Bose–Einstein condensate

Xueping Ren, Xiaolin Li, Zhikun Zhou, Xiaohuan Wan, Hongjuan Meng, Yushan Zhou, Juan Zhang, Xiaobei Fan, Jing Wang and Yuren Shi

Physica A: Statistical Mechanics and its Applications, 2022, vol. 585, issue C

Abstract: The dynamics of spin-1 Bose–Einstein condensate with a antiferromagnetic spin interaction through a moving obstacle potential are studied numerically. Various combinations of coreless vortex patterns are observed in two components. The average ratio of the distance between two vortex rows to the distance between two vortex pairs in a row is about 0.2, which is less than the stability criterion 0.28 for classical fluids. The angular velocity of the vortex street and the distance between two point vortices in a pair oscillate approximately periodically around an average value. The density of vortex-like structure also produces drag force, but it is very weak and the direction is opposite to the drag force generated by the quantum vortex. Finally, we provide an experimental protocol for the above realization and observation.

Keywords: Kármán vortex street; Spin-1 Bose–Einstein condensate; Coreless vortex (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:585:y:2022:i:c:s0378437121007056

DOI: 10.1016/j.physa.2021.126432

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