Superfluidity of a nonequilibrium Bose-Einstein condensate of polaritons

We study theoretically superfluidity in a driven-dissipative Bose gas out of thermal equilibrium, and discuss the relation with conventional superfluids. We show how the superfluid behavior is characterized by a dramatic increase in the lifetime of a quantized vortex and point out the influence of the spatial geometry of the condensate. We apply our study to a condensate of polaritons in a semiconductor microcavity, whose properties can be directly inferred from optical spectroscopy. We propose three different experimental schemes to measure the vorticity of the polariton condensate.


Published in:
Physical Review B, 81, 054508
Year:
2010
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 Record created 2010-02-14, last modified 2018-03-17

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