Superfluid density of an open dissipative condensate.
نویسنده
چکیده
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.
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ورودعنوان ژورنال:
- Physical review letters
دوره 107 8 شماره
صفحات -
تاریخ انتشار 2011