Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates
Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates
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DOI：
10.1103/physrevb.81.094517
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发表时间：
2009-09
影响因子：
3.7
通讯作者：
H. Takeuchi;Naoya Suzuki;K. Kasamatsu;H. Saito;M. Tsubota
中科院分区：
文献类型：
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作者：
H. Takeuchi;Naoya Suzuki;K. Kasamatsu;H. Saito;M. Tsubota
本文利用Gross-Pitaevskii和Bogoliubov-de Gennes模型对两组分玻色-爱因斯坦凝聚体中的Kelvin-Helmholtz不稳定性进行了理论研究。两种凝聚体之间的平坦界面被示出为变形成波或斯托克斯型波，导致在波的波峰和波谷上形成单量子化的涡旋。量子流体中的界面不稳定性与经典流体中的界面不稳定性完全不同。
We theoretically study the Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates using the Gross-Pitaevskii and Bogoliubov-de Gennes models. A flat interface between the two condensates is shown to deform into sawtooth or Stokes-type waves, leading to the formation of singly quantized vortices on the peaks and troughs of the waves. This scenario of interface instability in quantum fluids is quite different from that in classical fluids.