Quantum dew: Formation of quantum liquid in a nonequilibrium Bose gas - art. no. 083517

We consider phase separation in a nonequilibrium Bose gas with an attractiv e interaction between particles. Using numerical integrations on a lattice, we show that the system evolves into a state that contains drops of a Bose -Einstein condensate suspended in uncondensed gas. When the initial gas is sufficiently rarefied, the rate of formation of this quantum dew scales wit h the initial density as expected for a process governed by two-particle co llisions.