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Mode locking and mode competition in a nonequilibrium solid-state condensate
A trapped polariton condensate with continuous pumping and decay is analyzed using a generalized Gross? Pitaevskii model. Whereas an equilibrium condensate is characterized by a macroscopic occupation of a ground state, here the steady states take more general forms. Some are characterized by a large population in an excited state; others by large populations in several states, which may overlap spatially. In the latter case, the highly populated states synchronize to a common frequency above a critical density. At intermediate densities, they can drive condensation in other trap modes by parametric scattering. Estimates for the critical density of the synchronization transition are consistent with experiments
Keyword(s): Condensed matter physics
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: Trinity College Dublin
Citation(s): Eastham, PR, Mode locking and mode competition in a nonequilibrium solid-state condensate, Physical Review B, 78, 3, 2008, 035319
First Indexed: 2014-05-13 05:12:16 Last Updated: 2017-04-26 08:34:59