Superfluid density of an open dissipative condensate
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I calculate the superfluid density of a nonequilibrium 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.
Keeling , J 2011 , ' Superfluid density of an open dissipative condensate ' Physical Review Letters , vol 107 , no. 8 , 080402 . DOI: 10.1103/PhysRevLett.107.080402
Physical Review Letters
© 2011 American Physical Society
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