Energetic Stability of Coreless Vortices in Spin-1 Bose-Einstein Condensates with Conserved Magnetization
Energetic Stability of Coreless Vortices in Spin-1 Bose-Einstein Condensates with Conserved Magnetization
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DOI：
10.1103/physrevlett.112.075301
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发表时间：
2014-02-19
影响因子：
8.6
通讯作者：
Ruostekoski, Janne
中科院分区：
文献类型：
--
作者：
Lovegrove, Justin;Borgh, Magnus O.;Ruostekoski, Janne
我们证明了自旋凝聚体中纵向磁化的守恒为极性凝聚体上无芯涡旋相位印记提供了一种稳定机制。稳定涡旋可以形成具有明显的小距离和大距离拓扑结构的复合拓扑缺陷：内部铁磁无芯涡旋不断地向外部奇异、单量子化的极涡旋变形。类似的机制也可以稳定极性相中的非奇异向列织构。弱磁化可以使铁磁相中的无芯涡旋失稳。
We show that conservation of longitudinal magnetization in a spinor condensate provides a stabilizing mechanism for a coreless vortex phase-imprinted on a polar condensate. The stable vortex can form a composite topological defect with distinct small-and large-distance topology: the inner ferromagnetic coreless vortex continuously deforms toward an outer singular, singly quantized polar vortex. A similar mechanism can also stabilize a nonsingular nematic texture in the polar phase. A weak magnetization is shown to destabilize a coreless vortex in the ferromagnetic phase.