We present a generic model for the description of non-equilibrium Bose-Einstein condensates, suited for the modelling of non-resonantly pumped polariton condensates in a semiconductor microcavity. The excitation spectrum and scattering of the non-equilibrium condensate with a defect are discussed.
Model and elementary excitation spectrumDue to the finite polariton lifetime, the nature of polariton condensates  is fundamentally different from that of their superfluid 4 He and atomic Bose-Einstein condensate…
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