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arXiv · 1106.0682

Superfluid density of an open dissipative condensate

Jonathan Keeling
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Abstract

I calculate the superfluid density of a non-equilibrium steady state condensate of particles with finite lifetime. Despite the absence of a simple Landau critical velocity, a superfluid response survives, but dissipation reduces the superfluid fraction. I also suggest an idea for how the superfluid density of an example of such a system, i.e. microcavity polaritons, might be measured.

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Jonathan Keeling. 2011-06-03. Superfluid density of an open dissipative condensate. https://doi.org/10.1103/physrevlett.107.080402

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