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We show that the second-order, two-time correlation functions for phonons and photons emitted from a vibronic molecule in a thermal bath result in bunching and antibunching (a purely quantum effect), respectively. Signatures relating to phonon exchange with the environment are revealed in photon-photon correlations. We demonstrate that cross-correlation functions have a strong dependence on the order of detection giving insight into how phonon dynamics influences the emission of light. This work offers new opportunities to investigate quantum effects in condensed-phase molecular systems.
Original languageEnglish
Article number143601
JournalPhysical Review Letters
Issue number14
Early online date2 Oct 2023
Publication statusPublished - 6 Oct 2023


  • quant-ph
  • physics.chem-ph

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