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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Spectroscopy

Background:

  • Multiphoton correlations in quantum emitters are crucial for quantum technologies.
  • Standard methods like the quantum regression theorem struggle with vibrational environments.
  • Understanding phonon-emitter interactions is key to controlling quantum light properties.

Purpose of the Study:

  • To introduce a novel Markovian framework for calculating frequency-resolved N-photon correlation functions.
  • To overcome the limitations of existing theoretical tools for complex quantum systems.
  • To investigate phonon effects on fluorescence and coherence in semiconductor quantum dots.

Main Methods:

  • Developed a Markovian quantum dynamics framework.
  • Computed frequency-resolved N-photon correlation functions.
  • Applied the method to a driven semiconductor quantum dot model.

Main Results:

  • Accurately described phonon effects on fluorescence beyond the single-photon spectrum.
  • Captured the emergence of the phonon sideband, often missed by conventional methods.
  • Revealed phonon-induced structures in the filtered two-photon spectrum.
  • Demonstrated that phonon sideband photons inherit Mollow triplet coherence properties.

Conclusions:

  • The new framework provides a tractable approach for analyzing multiphoton correlations in vibronic systems.
  • Phonon sidebands significantly influence the coherence properties of emitted photons.
  • This work offers new insights into light-matter interactions in quantum dots.