Superfluid density of an open dissipative condensate

Details Superfluid density of an open dissipative condensate Superfluid density of an open dissipative condensate

2011-06-03

arxiv.org/abs/1106.0682v1

Phys. Rev. Lett. 107, 080402 (2011)

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.107.080402

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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