Nonequilibrium steady states of Bose-Einstein condensates with a local particle loss in double potential barriers
Nonequilibrium steady states of Bose-Einstein condensates with a local particle loss in double potential barriers
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DOI：
10.1103/physreva.100.063617
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发表时间：
2019-06
影响因子：
2.9
通讯作者：
M. Kunimi;I. Danshita
中科院分区：
文献类型：
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作者：
M. Kunimi;I. Danshita
研究了双势垒存在下具有局部一体损失的玻色-爱因斯坦凝聚体非平衡态的稳定性。我们构造了一个精确可解的平均场模型，其中局部损失和势垒采用delta函数的形式。利用模型的精确解，我们证明了存在两个稳态解是动态稳定的参数区域，即模型呈现双稳态。我们还发现，当局部损耗率在某些参数区域发生变化时，会出现单向迟滞现象。
We investigate stability of non-equilibrium steady states of Bose-Einstein condensates with a local one-body loss in the presence of double potential barriers. We construct an exactly solvable mean-field model, in which the local loss and the potential barriers take the form of a delta function. Using the exact solutions of our model, we show that there are parameter regions in which two steady-state solutions are dynamically stable, i.e., the model exhibits bistability. We also find that unidirectional hysteresis phenomena appear when the local-loss rate is varied in some parameter region.