2005/03/08 by Jonathan Keeling, P. R. Eastham, M. H. Szymańska +2 · 5 citations
Engineering · Physics and Astronomy · #Quantum Electrodynamics and Casimir Effect #Strong Light-Matter Interactions #Thermal Radiation and Cooling Technologies #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.72.115320
published as Phys. Rev. B 72, 115320 (2005) · 20 pages, 6 figures
arxiv created 2005/03/08 · openalex publication_date 2005/09/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.