Surface Instability of a Multi-Component Condensate and Andreev-Bashkin effect

TL;DR

This paper investigates the conditions under which the surface of a multi-component superfluid liquid becomes unstable, highlighting how dissipative interactions influence the instability threshold and discussing potential physical applications.

Contribution

It introduces a modified instability criterion for multi-component superfluid surfaces considering dissipative interactions, expanding understanding of superfluid surface dynamics.

Findings

Surface becomes unstable at a certain threshold

Dissipative interactions alter the instability criterion

Potential applications in superfluid systems

Abstract

It is shown that surface of a liquid consisting of several interpenetrating superfluids becomes unstable at some threshold. We demonstrate that the criterion for the onset of the instability changes in the presence of dissipative interaction between the surface and the environment. Possible physical applications of the surface instability are discussed.