Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates

Details Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates

2009-09-11

arxiv.org/abs/0909.2144v2

Phys. Rev. B 81, 094517 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.81.094517

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-like 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.

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