涡流
物理
玻色-爱因斯坦凝聚体
偶极子
谐波电位
阻力
障碍物
临界电离速度
唤醒
格罗斯-皮塔耶夫斯基方程
涡流环
凝聚态物理
经典力学
量子力学
机械
法学
政治学
作者
Zhong-Hong Xi,Yong Zhao,Yu-Ren Shi
标识
DOI:10.1016/j.physa.2021.125866
摘要
The Bénard–von Kármán vortex street in dipolar Bose–Einstein Condensate trapped by a harmonic potential is investigated numerically. The results show that when the velocity of the obstacle potential increases to a certain value and for a suitable potential width, the vortex pairs released from the moving obstacle potential alternately will form a periodic anti-symmetric double-row in dipolar BEC, and forming a Bénard–von Kármán vortex street. The influence of the dipole interaction strength, the width and the velocity of the obstacle potential on the vortex structure produced in the wake is also studied, and the structure of the phase diagram is obtained. The drag force on the obstacles potential is calculated, and the mechanical mechanism of vortex pair is analyzed.
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