Stochastic gross-pitaevskii equation for the dynamical thermalization of Bose-Einstein condensates

I. G. Savenko*, T. C.H. Liew, I. A. Shelykh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We present a theory for the description of energy relaxation in a nonequilibrium condensate of bosonic particles. The approach is based on coupling to a thermal bath of other particles (e.g., phonons in a crystal, or noncondensed atoms in a cold atom system), which are treated with a Monte Carlo type approach. Together with a full account of particle-particle interactions, dynamic driving, and particle loss, this offers a complete description of recent experiments in which Bose-Einstein condensates are seen to relax their energy as they propagate in real space and time. As an example, we apply the theory to the solid-state system of microcavity exciton polaritons, in which nonequilibrium effects are particularly prominent.

Original languageEnglish
Article number127402
JournalPhysical Review Letters
Issue number12
StatePublished - 18 Mar 2013
Externally publishedYes


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