Odd-petal-number states and persistent flows in spin-orbit-coupled Bose-Einstein condensates
Odd-petal-number states and persistent flows in spin-orbit-coupled Bose-Einstein condensates
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DOI：
10.1103/physreva.95.041604
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发表时间：
2016-12
影响因子：
2.9
通讯作者：
A. White;Yongping Zhang;T. Busch
中科院分区：
文献类型：
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作者：
A. White;Yongping Zhang;T. Busch
我们研究了二维环形陷阱中限制的 Rashba 自旋轨道耦合玻色-爱因斯坦凝聚态的相图。在不混溶状态中，我们发现了方位周期性密度分布，其周期性作为自旋轨道耦合强度的函数高度可调，并且有利于每个组件中具有奇数个花瓣。这允许创建多种状态。我们进一步表明，在混溶状态下，两种组分都具有持续流动的状态，它们之间具有单位缠绕数差异，并且这些缠绕数的绝对值取决于自旋轨道耦合强度。奇数花瓣和持续流动状态的所有特征都可以使用简单但有效的模型来解释。
We study the phase diagram of a Rashba spin-orbit-coupled Bose-Einstein condensate confined in a two-dimensional toroidal trap. In the immiscible regime we find an azimuthally periodic density distribution, with the periodicity highly tunable as a function of the spin-orbit-coupling strength and which favors an odd number of petals in each component. This allows for a wide range of states that can be created. We further show that in the miscible regime, both components possess states with persistent flows with a unit winding number difference between them and with the absolute values of these winding numbers depending on the spin-orbit-coupling strength. All features of the odd-petal and the persistent flow states can be explained using a simple but effective model.