Excitations in a non-equilibrium Bose-Einstein condensate of exciton-polaritons
M. Wouters, I. Carusotto
TL;DR
This paper develops a mean-field model to analyze excitations in a non-equilibrium exciton-polariton condensate, revealing diffusive Goldstone modes and novel Josephson effects in microcavities.
Contribution
It introduces a new mean-field framework for non-equilibrium polariton condensates and predicts unique excitation behaviors and Josephson phenomena.
Findings
Diffusive Goldstone mode in homogeneous condensates
Predicted new Josephson effects in two-well geometries
Analytical spectrum of elementary excitations
Abstract
We have developed a mean-field model to describe the dynamics of a non-equilibrium Bose-Einstein condensate of exciton-polaritons in a semiconductor microcavity. The spectrum of elementary excitations around the stationary state is analytically studied in different geometries. A diffusive behaviour of the Goldstone mode is found in the spatially homogeneous case and new features are predicted for the Josephson effect in a two-well geometry.
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