Weakly Interacting Bose Mixtures at Finite Temperature
Weakly Interacting Bose Mixtures at Finite Temperature
复制标题
有限温度下的弱相互作用玻色混合物
DOI：
10.1016/j.physa.2013.04.026
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发表时间：
2009
影响因子：
3.3
通讯作者：
B. Schaeybroeck
中科院分区：
文献类型：
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作者：
B. Schaeybroeck
受最近关于具有可调相互作用的玻色-爱因斯坦混合物的实验的启发，我们研究了有限温度下的排斥弱相互作用玻色混合物。我们使用Hartree-Fock理论得到的相图直接适用于实验捕获系统。图表的几乎所有特征都可以使用简单的物理见解来表征。我们的工作揭示了两个令人惊讶的效应，这与零温度下的系统不同。首先，不存在纯相，也就是说，在陷阱中的每一点，两种粒子总是存在。第二，即使是非常弱的种间排斥时，预计充分混合，两个物种的凝聚粒子可能存在于一个陷阱，而不被混合。
Motivated by the recent experiments on Bose–Einstein mixtures with tunable interactions we study repulsive weakly interacting Bose mixtures at finite temperature. We obtain phase diagrams using Hartree–Fock theory which are directly applicable to experimentally trapped systems. Almost all features of the diagrams can be characterized using simple physical insights. Our work reveals two surprising effects which are dissimilar to a system at zero temperature. First of all, no pure phases exist, that is, at each point in the trap, particles of both species are always present. Second, even for very weak interspecies repulsion when full mixing is expected, condensate particles of both species may be present in a trap without them being mixed.