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VOLUME 81 | ISSUE 12 | PAGE 771
Kelvin--Helmholtz instability in anisotropic superfluids
T. Ruokola, J. Kopu
Low Temperature Laboratory, Helsinki University of Technology FIN-02015 HUT, Finland

PACS: 47.20.Ma, 67.57.Np, 68.05.-n
Abstract
Motivated by recent theoretical and experimental interest in the subject, we derive the condition of interfacial Kelvin-Helmholtz instability for a system of two flowing superfluids (one sliding on the other). The tensor structure of superfluid densities in anisotropic superfluids - such as 3He-A, and also 3He-B under external magnetic field - is properly taken into account. The consequences relevant to experiments on the A-B phase boundary in superfluid 3He are discussed.


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