二元凝聚体的Rayleigh-Taylor不稳定性
Rayleigh-Taylor instability of binary condensates
摘要：
我们提出了一个引发和研究两种玻色-爱因斯坦凝聚体中瑞利-泰勒不稳定性的方案。我们确定$^{85}$ Rb- $^{87}$ Rb混合物作为一个很好的候选人，以观察它的实验。通过磁费什巴赫共振调谐$^{85}$ Rb- $^{85}$ Rb相互作用引发不稳定性。我们表明，可观察到的签名的不稳定性是阻尼的径向振荡。这可能是关于瑞利-泰勒不稳定性的最佳控制实验之一。我们还提出了一个半解析方案来确定轴对称势阱中二元凝聚态的定态。
英文摘要：
We propose a scheme to initiate and examine Rayleigh-Taylor instability in the two species Bose-Einstein condensates. We identify $^{85}$Rb-$^{87}$Rb mixture as an excellent candidate to observe it experimentally. The instability is initiated by tuning the $^{85}$Rb-$^{85}$Rb interaction through magnetic Feshbach resonance. We show that the observable signature of the instability is the damping of the radial oscillation. This would perhaps be one of the best controlled experiments on Rayleigh-Taylor instability. We also propose a semi analytic scheme to determinate stationary state of binary condensates with the Thomas-Fermi approximation for the axis symmetric traps.
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