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- W2805757486 abstract "We investigate theoretically nonequilibrium effects on photoluminescence and gain/absorption spectra of a driven-dissipative exciton-polariton condensate, by employing the combined Hartree-Fock-Bogoliubov theory with the generalized random phase approximation extended to the Keldysh formalism. Our calculated photoluminescence spectra is in semiquantitative agreement with experiments, where features such as a blue shift of the emission from the condensate, the appearance of the dispersionless feature of a diffusive Goldstone mode, and the suppression of the dispersive profile of the mode are obtained. We show that the nonequilibrium nature of the exciton-polariton condensate strongly suppresses the visibility of the Bogoliubov dispersion in the negative energy branch (ghost branch) in photoluminescence spectra. We also show that the trace of this branch can be captured as a hole burning effect in gain/absorption spectra. Our results indicate that the nonequilibrium nature of the exciton-polariton condensate strongly reduces quantum depletion, while a scattering channel to the ghost branch is still present." @default.
- W2805757486 created "2018-06-13" @default.
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- W2805757486 date "2018-06-01" @default.
- W2805757486 modified "2023-10-16" @default.
- W2805757486 title "Photoluminescence and gain/absorption spectra of a driven-dissipative electron-hole-photon condensate" @default.
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- W2805757486 doi "https://doi.org/10.1103/physrevb.97.245302" @default.
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