Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-09-26
Physics
Condensed Matter
Other Condensed Matter
35 pages, 5 figures
Scientific paper
10.1103/PhysRevB.77.085317
The influence of polariton-polariton scattering on the statistics of the polariton condensate in a non-resonantly excited semiconductor quantum well embedded in a CdTe semiconductor microcavity is discussed. Taking advantage of the existence of a bottleneck in the polariton dispersion curve, the polariton states are separated into two domains: reservoir polaritons inside the bottleneck and active polaritons with wave vector q whose energy lies below the bottleneck. In the framework of the master equation formalism, the non-equilibrium stationary reduced density matrix is calculated and the statistics of polaritons in the condensate at q=0 is determined. The anomalous correlations between the polaritons in the condensate and those with wave vectors q, -q leads to an enhancement of the noise in the condensate. As a consequence, the second order correlation function of the condensate does not show the full coherence that is characteristic of laser emission.
Quattropani Antonio
Schwendimann Paolo
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