Optical signatures of electron-phonon decoupling due to strong light-matter interactions

Emil Vosmar Denning*, Matias Bundgaard-Nielsen, Jesper Mørk

*Corresponding author for this work

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Phonon interactions in solid-state photonics systems cause intrinsic quantum decoherence and often present the limiting factor in emerging quantum technology. Due to recent developments in nanophotonics, exciton-cavity structures with very strong light-matter coupling rates can be fabricated. We show that in such structures, a regime emerges where the decoherence is completely suppressed due to decoupling of the dominant phonon process. Using a numerically exact tensor network approach, we perform calculations in this nonperturbative, non-Markovian dynamical regime. Here, we identify a strategy for reaching near-unity photon indistinguishability and also discover an interesting phonon dressing of the exciton-cavity polaritons in the high-Q regime, leading to multiple phonon sidebands when the light-matter interaction is sufficiently strong.
Original languageEnglish
Article number235303
JournalPhysical Review B
Issue number23
Number of pages10
Publication statusPublished - 2020

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