自旋1玻色-爱因斯坦凝聚体中自旋轨道耦合诱导的分离和隐藏自旋织构
Spin-orbit coupling induced separation and hidden spin textures in spin-1 Bose-Einstein condensates
摘要：
本文用解析和数值方法研究了外抛物势场中自旋轨道耦合自旋1玻色-爱因斯坦凝聚体的基态。当自旋-轨道耦合强度$κ$与囚禁势相当时，在平面波和条纹相中，旋量凝聚体各组分的密度分布中心明显偏离囚禁中心.当$κ\gg1$时，该偏差的幅度随着$κ$变得越来越大而减小。相应地，周边半skyrmions纹理出现。这种偏离可以通过在$z$方向上的不均匀磁矩$\mathcal{F}_z$来反映。通过外势阱的操纵，$\mathcal{F}_z$的局域强度可以得到明显的提高.这种$\mathcal{F}_z$的增加在凝聚体的方涡晶格相中也被观察到。
英文摘要：
We analytically and numerically investigate the ground state of the spin-orbit coupled spin-1 Bose-Einstein condensates in an external parabolic potential. When the spin-orbit coupling strength $κ$ is comparable with that of the trapping potential, the density distribution centers of different components of the spinor condensate deviate evidently from the trap center in the plane wave and stripe phases. When $κ\gg1$, the magnitude of this deviation decreases as $κ$ is getting larger and larger. Correspondingly, periphery half-skyrmions textures arise. This deviation can be reflected by the non-uniform magnetic moment in the $z$ direction, $\mathcal{F}_z$. With the manipulation of the external trap, the local magnitude of $\mathcal{F}_z$ can be increased evidently. This kind of increase of $\mathcal{F}_z$ is also observed in the square vortex lattice phase of the condensate.
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