Nonequilibrium quantum condensation in an incoherently pumped dissipative system.

Nonlinear relaxation in nonequilibrium oscillators: Bose± Einstein-like condensation in a dissipative structure

We consider a system of externally pumped nonequilibrium harmonic oscillators (vibrational modes) interacting through anharmonic e€ects with a system of harmonic oscillators with lower-lying frequencies (acoustic-like vibrations) composing a thermal bath for the former. We derive the equations of evolution for the population of the vibrational modes, introducing high order nonlinear relaxation ...

Thermalization and condensation in an incoherently pumped passive optical cavity

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 ph...

Dissipative solitons and vortices in polariton Bose-Einstein condensates

We examine spatial localization and dynamical stability of Bose-Einstein condensates of exciton polaritons in microcavities under the condition of off-resonant spatially inhomogeneous optical pumping both with and without a harmonic trapping potential. We employ the open-dissipative Gross-Pitaevskii model for describing an incoherently pumped polariton condensate coupled to an exciton reservoir...

Finite temperature correlation function of two dissipative massive scalar fields: Thermofield approach

The present paper aims at investigating the manner of two dissipative massive scalar fields. Two massive scalar fields that interact with a reservoir were considered and a reservoir was modeled by continuum Klein-Gordon fields. The Lagrangian of the total system was canonically quantized and the dynamics of the system was determined using the Euler-Lagrange equation. Then, the explicit form of the...