Emergent patterns in a spin-orbit-coupled spin-2 Bose-Einstein condensate
Emergent patterns in a spin-orbit-coupled spin-2 Bose-Einstein condensate
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自旋轨道耦合自旋 2 玻色-爱因斯坦凝聚体中的涌现模式
DOI：
10.1103/physreva.83.053602
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发表时间：
2011-03
期刊：
影响因子：
--
通讯作者：
L. You
中科院分区：
文献类型：
--
作者：
Z. F. Xu;吕嵘;L. You
研究了自旋轨道耦合原子自旋2玻色-爱因斯坦凝聚体的基态位相。有趣的密度图案形式自发地是广泛的，由于SO耦合和自旋相关的相互作用之间的竞争，如在SO耦合自旋-1凝聚。与自旋-1凝聚体的情况下，其特征在于无论是铁磁或极性相的情况下，SO，自旋-2凝聚体可以采取循环相，在那里我们发现，由于SO形成的图案是正方形或三角形的自旋分量密度轴对称SO相互作用。这两种模式被发现不断演变成条纹的形式，增加不对称的SO耦合。
The ground-state phases of a spin-orbit (SO)-coupled atomic spin-2 Bose-Einstein condensate are studied. Interesting density patterns forme spontaneously are widespread due to the competition between SO coupling and spin-dependent interactions as in an SO-coupled spin-1 condensate. Unlike the case of spin-1 condensates, which are characterized by either a ferromagnetic or a polar phase in the absence of SO, spin-2 condensates can take a cyclic phase, where we find that the patterns formed due to SO are square or triangular in their spin-component densities for axial symmetric SO interaction. Both patterns are found to evolve continuously into striped forms with increased asymmetry of the SO coupling.