亚稳态玻色-爱因斯坦凝聚体的拓扑缠绕和解绕
Topological Winding and Unwinding in Metastable Bose-Einstein Condensates
摘要：
准一维亚稳态玻色-爱因斯坦凝聚体的拓扑缠绕和解绕可以通过改变相互作用的强度或旋转频率来控制。精确的对角化分析表明，quasidegenerate状态自发出现的过渡点附近，允许拓扑不同的状态之间的平滑交叉。在平均场水平上，这种转变伴随着灰孤子或密度缺口的形成，这是这种现象的实验特征。
英文摘要：
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 grey solitons, or density notches, which serve as an experimental signature of this phenomenon.
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