Ground-state phases of the spin-orbit-coupled spin-1 Bose gas in a toroidal trap
Ground-state phases of the spin-orbit-coupled spin-1 Bose gas in a toroidal trap
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环形陷阱中自旋轨道耦合自旋 1 玻色气体的基态相
DOI：
10.1103/physreva.96.033629
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发表时间：
2017-09
影响因子：
2.9
通讯作者：
Shi-Jie Yang
中科院分区：
文献类型：
--
作者：
Ji-Guo Wang;Liang-Liang Xu;Shi-Jie Yang
我们考虑二维环形陷阱中自旋 1 玻色-爱因斯坦凝聚态与各向同性 Rashba 自旋轨道耦合。非旋转系统中存在三种类型的条纹相位，即沿方位角方向具有周期性密度调制的条纹相位、沿方位角和径向方向具有周期性密度调制的条纹相位、以及沿径向方向具有周期性密度调制的条纹相位。通过增加旋转，凝聚态占据小旋转频率的分量，而当相对相互作用和自旋轨道耦合都很弱时，它们占据大旋转频率的 和 分量。由于较强的相对相互作用和自旋轨道耦合，系统的涡旋沿径向拉长并相互连接。随着旋转频率进一步增加，密度从涡流的拉长效应演变为层流涡环。
We consider the spin-1 Bose-Einstein condensates with the isotropic Rashba spin-orbit coupling in a two-dimensional toroidal trap. Three types of striped phases are found in a nonrotational system, i.e., the stripe phase with the periodic density modulation along the azimuthal direction, the stripe phase with the periodic density modulation along both the azimuthal and the radial directions, and the stripe phase with the periodic density modulation along the radial direction. By adding the rotation, the condensates occupy thecomponent for small rotational frequency, while they occupy both theandcomponents for large rotational frequency when both the relative interaction and the spin-orbit coupling are weak. For the stronger relative interaction and spin-orbit coupling, the vortices of the system are elongated along the radial direction and linked one after another. As the rotational frequency further increases, the density evolves from the elongated effect of the vortices into a laminar vortex ring.