Nonequilibrium dynamics induced by miscible–immiscible transition in binary Bose–Einstein condensates
Nonequilibrium dynamics induced by miscible–immiscible transition in binary Bose–Einstein condensates
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DOI：
10.1088/1367-2630/18/7/073029
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发表时间：
2015-12
影响因子：
3.3
通讯作者：
Y. Eto;Masahiro Takahashi;M. Kunimi;H. Saito;T. Hirano
中科院分区：
文献类型：
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作者：
Y. Eto;Masahiro Takahashi;M. Kunimi;H. Saito;T. Hirano
我们观察和表征了两组分87Rb玻色-爱因斯坦凝聚体(BEC)的非平衡空间动力学，该凝聚体通过改变87Rb原子的内态，可控制地在相分离相变的可混溶和不混溶之间来回切换。随后的演化表现出空间结构的大范围振荡，涉及成分混合和分离。结果表明，混相体系的总能量越大，振荡频率越高。这项研究介绍了一种控制原子BEC中的混溶和空间自由度的新技术。
We have observed and characterized the nonequilibrium spatial dynamics of a two-component 87Rb Bose–Einstein condensate (BEC) that is controllable switched back and forth between the miscible and immiscible phases of the phase separation transition by changing the internal states of the 87Rb atoms. The subsequent evolution exhibits large scale oscillations of the spatial structure that involve component mixing and separation. We show that the larger total energy of the miscible system results in a higher oscillation frequency. This investigation introduces a new technique to control the miscibility and the spatial degrees of freedom in atomic BECs.