Addressing the correlation of Stokes-shifted photons emitted from two quantum emitters

• URL: http://arxiv.org/abs/2501.19356v1
• Date: Fri, 31 Jan 2025 18:07:02 GMT
• Title: Addressing the correlation of Stokes-shifted photons emitted from two quantum emitters
• Authors: Adrián Juan-Delgado, Jean-Baptiste Trebbia, Ruben Esteban, Quentin Deplano, Philippe Tamarat, Rémi Avriller, Brahim Lounis, Javier Aizpurua,
• Abstract summary: We propose a general model to characterize the correlation of either Zero-Phonon Line photons or Stokes-shifted photons. This model successfully reproduces the experimental correlation of Stokes-shifted photons emitted from two interacting molecules. We analyze the role of quantum coherence in light emission from two uncorrelated emitters.
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• Abstract: In resonance fluorescence excitation experiments, light emitted from solid-state quantum emitters is typically filtered to eliminate the laser photons, ensuring that only red-shifted Stokes photons are detected. Theoretical analyses of the fluorescence intensity correlation often model emitters as two-level systems, focusing on light emitted exclusively from the purely electronic transition (the Zero-Phonon Line), or rely on statistical approaches based on conditional probabilities that do not account for quantum coherences. Here, we propose a general model to characterize the correlation of either Zero-Phonon Line photons or Stokes-shifted photons. This model successfully reproduces the experimental correlation of Stokes-shifted photons emitted from two interacting molecules and predicts that this correlation is affected by quantum coherence. Besides, we analyze the role of quantum coherence in light emission from two uncorrelated emitters, which helps to clarify the discrepancy between theory and experiments regarding the value of the correlation of photons emitted from this system at zero delay time.

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