Moving obstacle potential in a spin-orbit-coupled Bose-Einstein condensate

被引：14
|
作者：
Kato, Masaya [1 ]
Zhang, Xiao-Fei [2 ,3 ]
Saito, Hiroki [1 ]
机构：
[1] Univ Electrocommun, Dept Engn Sci, Tokyo 1828585, Japan
[2] Chinese Acad Sci, Natl Time Serv Ctr, Key Lab Time & Frequency Primary Stand, Xian 710600, Shaanxi, Peoples R China
[3] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
来源：
PHYSICAL REVIEW A | 2017年 / 96卷 / 03期
基金：
日本学术振兴会; 中国国家自然科学基金;
关键词：
NEUTRAL ATOMS; DISSIPATION; SUPERFLOW; MODEL;
D O I：
10.1103/PhysRevA.96.033613
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the dynamics around an obstacle potential moving in the plane-wave state of a pseudospin-1/2 Bose-Einstein condensate with Rashba spin-orbit coupling. We numerically investigate the dynamics of the system and find that it depends not only on the velocity of the obstacle but also significantly on the direction of obstacle motion, both of which are verified by the Bogoliubov analysis. The excitation diagram with respect to the velocity and direction is obtained. The dependence of the critical velocity on the strength of the spin-orbit coupling and the size of the obstacle is also investigated.
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页数：8
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