Topological winding and unwinding in metastable Bose-Einstein condensates.
Topological winding and unwinding in metastable Bose-Einstein condensates.
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DOI：
10.1103/physrevlett.100.060401
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发表时间：
2007-04
影响因子：
8.6
通讯作者：
R. Kanamoto;L. Carr;Masahito Ueda
中科院分区：
文献类型：
--
作者：
R. Kanamoto;L. Carr;Masahito Ueda
准一维亚稳态玻色-爱因斯坦凝聚体中的拓扑缠绕和展开可以通过改变相互作用的强度或旋转频率来控制。精确对角化分析表明，准边生成态在过渡点附近自发出现，从而允许拓扑不同态之间的平滑交叉。在平均场水平上，转变伴随着灰色孤子或密度凹口的形成，这是这种现象的实验特征。
Topological winding and unwinding in a quasi-one-dimensional metastable Bose-Einstein condensate are shown to be manipulated by changing the strength of interaction or the frequency of rotation. Exact diagonalization analysis reveals that quasidegenerate states emerge spontaneously near the transition point, allowing a smooth crossover between topologically distinct states. On a mean-field level, the transition is accompanied by formation of gray solitons, or density notches, which serve as an experimental signature of this phenomenon.