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Finite-momentum condensation in a pumped microcavity
We calculate the absorption spectra of a semiconductor microcavity into which a nonequilibrium exciton population has been pumped. We predict strong peaks in the spectrum corresponding to collective modes analogous to the Cooper modes in superconductors and fermionic atomic gases. These modes can become unstable, leading to the formation of off-equilibrium quantum condensates. We calculate a phase diagram for condensation and show that the dominant instabilities can be at a finite momentum. Thus we predict the formation of inhomogeneous condensates, similar to Fulde-Ferrel-Larkin-Ovchinnikov states.
Keyword(s): Condensed matter physics; inhomogeneous condensates; Nanoscience & Materials
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: Trinity College Dublin
Citation(s): Brierley, RT, Eastham, PR, Finite-momentum condensation in a pumped microcavity, Physical Review B, 82, 3, 2010, 035317
First Indexed: 2014-05-13 05:47:42 Last Updated: 2017-04-26 08:36:40