paper

Quantum Treatment for Bose-Einstein Condensation in Non-Equilibrium Systems

arXiv:1503.08424 · doi:10.1103/PhysRevB.92.115117

Abstract

We develop an approach based on stochastic quantum trajectories for an incoherently pumped system of interacting bosons relaxing their energy in a thermal reservoir. Our approach enables the study of the versatile coherence properties of the system. We apply the model to exciton polaritons in a semiconductor microcavity. Our results demonstrate the onset of macroscopic occupation in the lowest-energy mode accompanied by the establishment of both temporal and spatial coherence. We show that temporal coherence exhibits a transition from a thermal to coherent statistics and the spatial coherence reveals off-diagonal long-range order.

5 Pages, 3 figures

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