Photon Number Coherence in Quantum Dot-Cavity Systems can be Enhanced by Phonons

Paul C. A. Hagen (Corresponding author), Mathieu Bozzio, Moritz Cygorek, Doris E. Reiter, Vollrath M. Axt

Publications: Contribution to journalArticlePeer Reviewed

Abstract

Semiconductor quantum dots are a versatile source of single photons with tunable properties to be used in quantum-cryptographic applications. A crucial figure of merit of the emitted photons is photon number coherence (PNC), which impacts the security of many quantum communication protocols. In the process of single-photon generation, the quantum dot as a solid-state object is subject to an interaction with phonons, which can therefore indirectly affect the PNC. In this study, the origin of PNC in optically excited quantum dots and its interaction with phonons are elaborated upon. In contrast to the expectation that phonons always deteriorate coherence, PNC can be increased in a quantum dot-cavity system due to the electron?phonon interaction.
Original languageEnglish
Article number2400455
Number of pages13
JournalAdvanced Quantum Technologies
DOIs
Publication statusE-pub ahead of print - 8 Jan 2025

Austrian Fields of Science 2012

  • 103026 Quantum optics
  • 103011 Semiconductor physics

Keywords

  • coherence
  • photon number coherence
  • phonon
  • photonic cavity
  • quantum dot
  • Rabi rotations
  • single photon

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