Fractional and integer vortex dynamics in strongly coupled two-component Bose-Einstein condensates from AdS/CFT correspondence
Fractional and integer vortex dynamics in strongly coupled two-component Bose-Einstein condensates from AdS/CFT correspondence
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AdS/CFT 对应的强耦合二组分玻色-爱因斯坦凝聚中的分数和整数涡旋动力学
DOI：
10.1103/physrevd.102.046012
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Zeng Hua-Bi
中科院分区：
文献类型：
--
作者：
Yang Wei-Can;Xia Chuan-Yin;Nitta Muneto;Zeng Hua-Bi
为了研究旋转强耦合玻色-爱因斯坦凝聚(BEC)，提出了一个定义在反de Sitter黑洞中的全息模型，该模型对偶于具有分量间耦合和内部相干耦合的球对称破缺相中耦合的两分量凝聚。通过对模型动力学的求解，研究了涡旋的形成过程以及分数阶涡相与整数阶涡相的交叉。分数阶涡旋晶格只需从零变到有限值，就会经历从六边形到正方形晶格再到涡旋片的转变。继续开启，我们发现两个不同组分的分数旋涡组成二聚体，当超过一个临界值时，出现了由两个和三个二聚体组成的六聚体或四聚体等多聚体。随着不断增加，一些二聚体旋转以调整自身，然后构成整数涡旋的晶格。在类似于旋量BEC涡动力学实验的初始条件下，发现分数涡的产生过程中出现了无序湍流，这与实验观测相吻合。在整体涡的形成过程中，预测了沟槽的出现。
In order to study the rotating strongly coupled Bose-Einstein condensations (BEC), a holographic model defined in an anti–de Sitter black hole that duals to a coupled two-component condensations in globalsymmetry broken phase with intercomponent couplingand internal coherent couplingis proposed. By solving the dynamics of the model, we study the process of vortex formation and also the crossover from fractional to integer vortex phases. With changing onlyfrom zero to a finite value, fractional vortex lattices undergo a transition from hexagon to square lattice and finally to vortex sheets. By continuing to turn on, we find that two fractional vortices in different components constitute dimers, and whentranscends a critical value, multidimer like hexamer or tetramer made up of two and three dimers appears. Askeeps increasing, some dimers rotate to adjust themselves and then constitute the lattice of integer vortices. Under an initial condition similar to a spinor BEC vortices dynamics experiment, the appearance of disordered turbulence is found in the process of fractional vortex generation, which matches the experimental observation. While in the formation process of integer vortices, the appearance of grooves is predicted.