Non-equilibrium quantum condensation in an incoherently pumped   dissipative system
  We study spontaneous quantum coherence in an out of equilibrium system, coupled to multiple baths describing pumping and decay. For a range of parameters describing coupling to, and occupation of the baths, a stable steady-state condensed solution exists. The presence of pumping and decay significantly modifies the spectra of phase fluctuations, leading to correlation functions that differ both from an isolated condensate and from a laser. 
M. H. Szymanska, J. Keeling, P. B. Littlewood