M. M. Glazov, M. A. Semina, E. Ya. Sherman, A. V. Kavokin
We develop a theory of spin fluctuations of exciton-polaritons in a quantum microcavity under the non-resonant unpolarized pumping. It is shown that the spin noise is sensitive to the scattering rates in the system, occupation of the ground state, statistics of polaritons and interactions. The spin noise spectrum drastically narrows in the polariton lasing regime due to formation of a polariton condensate, while its shape becomes non-Lorentzian owing to interaction-induced spin decoherence.
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http://arxiv.org/abs/1302.6439
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