Kármán vortex street in a spin-orbit-coupled Bose-Einstein condensate with PT symmetry

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外文摘要：The dynamics of spin-orbit-coupled Bose-Einstein condensate with parity-time symmetry through a moving obstacle potential is simulated numerically.In the miscible two-component condensate,the formation of the Kármán vortex street is observed in one component,while'the half-quantum vortex street'is observed in the other component.Other patterns of vortex shedding,such as oblique vortex dipoles,V-shaped vortex pairs,irregular turbulence,and combined modes of various wakes,can also be found.The ratio of inter-vortex spacing in one row to the distance between vortex rows is approximately 0.18,which is less than the stability condition 0.28 of classical fluid.The drag force acting on the obstacle potential is simulated.The parametric regions of Kármán vortex street and other vortex patterns are calculated.The range of Kármán vortex street is surrounded by the region of combined modes.In addition,spin-orbit coupling disrupts the symmetry of the system and the gain-loss affects the local particle distribution of the system,which leads to the local symmetry breaking of the system,and finally influences the stability of the Kármán vortex street.Finally,we propose an experimental protocol to realize the Kármán vortex street in a system.

外文关键词：

Kármán vortex streetBose-Einstein condensatespin-orbit-coupledparity-time symmetry

作者：

邵凯花、席保龙、席忠红、涂朴、王青青、马金萍、赵茜、石玉仁

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作者单位：

College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,China

College of Physics and Hydropower Engineering,Gansu Normal College For Nationalities,Hezuo 747000,China

College of Intelligent Manufacturing,Sichuan University of Arts and Science,Dazhou 635000,China

基金：

国家自然科学基金国家自然科学基金

项目编号：

1206502212147213

出版年：

2024

DOI：

10.1088/1674-1056/ad2bf3

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(6)

参考文献量49