Coherence properties of the microcavity polariton condensate
arXiv:0811.4333 · doi:10.1209/0295-5075/87/27002
Abstract
A theoretical model is presented which explains the dominant decoherence process in a microcavity polariton condensate. The mechanism which is invoked is the effect of self-phase modulation, whereby interactions transform polariton number fluctuations into random energy variations. The model shows that the phase coherence decay, g1(t), has a Kubo form, which can be Gaussian or exponential, depending on whether the number fluctuations are slow or fast. This fluctuation rate also determines the decay time of the intensity correlation function, g2(t), so it can be directly determined experimentally. The model explains recent experimental measurements of a relatively fast Gaussian decay for g1(t), but also predicts a regime, further above threshold, where the decay is much slower.
5 pages, 1 figure
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Cited by in corpus (10)
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- Spin multistability in dissipative polariton channels
- Room-temperature cavity exciton-polariton condensation in perovskite quantum dots
- The temporal coherence of a photon condensate: A quantum trajectory description
- Narrow-linewidth exciton-polariton laser
- Keldysh Green's function approach to coherence in a non-equilibrium steady state: connecting Bose-Einstein condensation and lasing
- Giant increase of temporal coherence in optically trapped polariton condensate
- Bogoliubov theory of the laser linewidth and application to polariton condensates