Circular-hyperbolic skyrmion in rotating pseudo-spin-1/2 Bose-Einstein condensates with spin-orbit coupling
Circular-hyperbolic skyrmion in rotating pseudo-spin-1/2 Bose-Einstein condensates with spin-orbit coupling
复制标题
具有自旋轨道耦合的旋转赝自旋 1/2 玻色-爱因斯坦凝聚体中的圆双曲斯格明子
DOI：
10.1103/physreva.86.053616
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发表时间：
2012-11-19
影响因子：
2.9
通讯作者：
Liu, Wu-Ming
中科院分区：
文献类型：
--
作者：
Liu, Chao-Fei;Fan, Heng;Liu, Wu-Ming
通过利用随机投影 Gross-Pitaevskii 方程探索自旋轨道耦合旋转赝自旋 1/2 Bose-Einstein 凝聚态，我们证明了圆双曲斯格明子的存在，它具有两个 S-z 极值。当系统达到平衡状态时，不相等的种内相互作用和种间相互作用导致两个组成部分完全不成比例。圆双曲斯格明子是由涡旋偶极子结构产生的。对于可混溶凝聚态，自旋轨道耦合的增加增强了圆双曲斯格明子的产生，并使它们在局部相互连接。特别是，当自旋轨道耦合仅在一个方向时，圆双曲斯格明子甚至可以形成链。对于不混溶凝聚态，双曲斯格明子出现在凝聚态的中心，而圆双曲斯格明子出现在凝聚态的外围。自旋轨道耦合的增加限制了双曲斯格明子的产生并增强了圆双曲斯格明子的产生。
By exploring the spin-orbit-coupled rotating pseudo-spin-1/2 Bose-Einstein condensates with the stochastic projected Gross-Pitaevskii equations, we prove the existence of the circular-hyperbolic skyrmion, which possesses two extreme values of S-z. The nonequal intraspecies interactions and interspecies interactions cause the two components to be wholly disproportionate when the system reaches the equilibrium state. The circular-hyperbolic skyrmion results from the vortex-dipole structure. For the miscible condensates, the increase of spin-orbit coupling enhances the creation of the circular-hyperbolic skyrmion, and makes them link one after another locally. In particular, the circular-hyperbolic skyrmion even can form a chain when the spin-orbit coupling is only in one direction. For the immiscible condensates, the hyperbolic skyrmion occurs at the center, while the circular-hyperbolic skyrmion occurs at the outskirts of the condensates. The increase of the spin-orbit coupling restricts the creation of the hyperbolic skyrmion and enhances the creation of the circular-hyperbolic skyrmion.