猝灭不互溶二元凝聚体中的随机增长动力学和复合缺陷
Stochastic Growth Dynamics and Composite Defects in Quenched Immiscible Binary Condensates
摘要：
我们研究了耦合凝聚形成动力学的初始随机域形成的背景下，瞬时淬火细长的谐波捕获不混溶的双组分原子玻色气体的历史上的敏感性。自发产生的缺陷在最快的冷凝组件，和随后的粗粒化动力学，可以导致一个深振荡的微陷阱，其他组件冷凝，从而建立一个长寿命的复合缺陷的形式的暗-亮孤立波。我们用数字绘制出这些竞争性增长动力学的不同关键方面，重点关注拍摄到拍摄波动和全局参数变化（初始状态选择，淬火参数和冷凝物增长率）的作用。我们的结论是，在实验时间尺度上观察到的相分离的结构很可能是亚稳态，其形式的自发出现的暗-亮孤立波的稳定性和动力学的影响。
英文摘要：
We study the sensitivity of coupled condensate formation dynamics on the history of initial stochastic domain formation in the context of instantaneously quenched elongated harmonically-trapped immiscible two-component atomic Bose gases. The spontaneous generation of defects in the fastest condensing component, and subsequent coarse-graining dynamics, can lead to a deep oscillating microtrap into which the other component condenses, thereby establishing a long-lived composite defect in the form of a dark-bright solitary wave. We numerically map out diverse key aspects of these competing growth dynamics, focussing on the role of shot-to-shot fluctuations and global parameter changes (initial state choices, quench parameters and condensate growth rates). We conclude that phase-separated structures observable on experimental timescales are likely to be metastable states whose form is influenced by the stability and dynamics of the spontaneously-emerging dark-bright solitary wave.
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