Sarchi, D.Savona, V.2009-09-222009-09-222009-09-22200810.1103/PhysRevB.77.045304https://infoscience.epfl.ch/handle/20.500.14299/42802WOS:000252863100074The Hartree-Fock-Popov theory of interacting Bose particles is developed, for modeling exciton-polaritons in semiconductor microcavities undergoing Bose-Einstein condensation. A self-consistent treatment of the linear exciton-photon coupling and of the exciton nonlinearity provides a thermal equilibrium description of the collective excitation spectrum, of the polariton energy shifts and of the phase diagram. Quantitative predictions support recent experimental findings.Finite Temperaturestext::journal::journal article::research article