Department of Physics, Sungkyunkwan University, Suwon, Korea.
Phys Rev Lett. 2011 Nov 11;107(20):200401. doi: 10.1103/PhysRevLett.107.200401. Epub 2011 Nov 7.
We examine the combined effects of Rashba spin-orbit (SO) coupling and rotation on trapped spinor Bose-Einstein condensates. The nature of single particle states is thoroughly examined in the Landau level basis and is shown to support the formation of a half-quantum vortex. In the presence of weak s-wave interactions, the ground state at strong SO coupling develops ringlike structures with domains whose number shows step behavior with increasing rotation. For the fast rotation case, the vortex pattern favors a triangular lattice, accompanied by density depletion in the central region and a weakened Skyrmionic character as the SO coupling is enhanced. Giant vortex formation is facilitated when SO coupling and rotation are both strong.
我们研究了 Rashba 自旋轨道（SO）耦合和旋转对被俘自旋玻色-爱因斯坦凝聚体的综合影响。在朗道能级基础上彻底研究了单粒子态的性质，并证明其支持形成半量子涡旋。在存在弱 s 波相互作用的情况下，在强 SO 耦合下的基态会发展出具有域的环状结构，其数量随着旋转的增加表现出阶跃行为。对于快速旋转的情况，涡旋图案有利于三角形晶格，伴随着中心区域的密度耗尽和 Skyrmionic 特征的减弱，随着 SO 耦合的增强。当 SO 耦合和旋转都很强时，有利于形成巨涡旋。
