title: Stationary density matrix of a pumped polariton system.
abstract: The density matrix rho of a model polariton system is obtained numerically from a master equation which takes account of pumping and losses. In the stationary limit, the coherences between eigenstates of the Hamiltonian are 3 orders of magnitude smaller than the occupations, meaning that the stationary density matrix is approximately diagonal in the energy representation. A weakly distorted grand canonical Gibbs distribution fits well the occupations.
authors.affiliation: Instituto de Física, Universidad de Antioquia, AA 1226, Medellín, Colombia.
authors.forename: Carlos Andrés
authors.initials: CA
authors.lastname: Vera
authors.forename: Alejandro
authors.initials: A
authors.lastname: Cabo
authors.forename: Augusto
authors.initials: A
authors.lastname: González