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Order parameter dynamics of a Bose-Einstein condensate of exciton-polaritons in semiconductor microcavities

I. Shelykh·F. P. Laussy·A. V. Kavokin·G. Malpuech
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Abstract

It is shown theoretically that Bose condensation of spin-degenerated exciton-polaritons results in spontaneous buildup of the linear polarization in emission spectra of semiconductor microcavities. The linear polarization degree is a good order parameter for the polariton Bose condensation. If spin-degeneracy is lifted, an elliptically polarized light is emitted by the polariton condensate. The main axis of the ellipse rotates in time due to self-induced Larmor precession of the polariton condensate pseudospin. The polarization decay time is governed by the dephasing induced by the polariton-polariton interaction and strongly depends on the statistics of the condensed state.

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I. Shelykh, F. P. Laussy, A. V. Kavokin, G. Malpuech. 2005-03-16. Order parameter dynamics of a Bose-Einstein condensate of exciton-polaritons in semiconductor microcavities. https://doi.org/10.1103/physrevb.73.035315

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