BCS-BEC crossover in a system of microcavity polaritons
Citation:
Keeling, J, Eastham, PR, Szymanska, MH, Littlewood, PB, BCS-BEC crossover in a system of microcavity polaritons, Physical Review B, 72, 11, 2005, 115320Download Item:
Abstract:
We investigate the thermodynamics and signatures of a polariton condensate over a range of densities, using
a model of microcavity polaritons with internal structure. We determine a phase diagram for this system
including fluctuation corrections to the mean-field theory. At low densities the condensation temperature Tc
behaves like that for point bosons. At higher densities, when Tc approaches the Rabi splitting, Tc deviates from
the form for point bosons, and instead approaches the result of a BCS-like mean-field theory. This crossover
occurs at densities much less than the Mott density. We show that current experiments are in a density range
where the phase boundary is described by the BCS-like mean-field boundary. We investigate the influence of
inhomogeneous broadening and detuning of excitons on the phase diagram.
Author's Homepage:
http://people.tcd.ie/easthampDescription:
PUBLISHED
Author: EASTHAM, PAUL
Publisher:
American Physical SocietyType of material:
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Series/Report no:
Physical Review B;72;
11;
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Full text availableKeywords:
Atomic, molecular and chemical physics, polaritonMetadata
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