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Hong-Ou-Mandel Interference with Imperfect Single Photon Sources.

H Ollivier1, S E Thomas1, S C Wein2

  • 1Centre for Nanosciences and Nanotechnology, CNRS, Université Paris-Saclay, UMR 9001, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.

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|February 26, 2021
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Summary
This summary is machine-generated.

Unwanted multiphoton noise in single-photon sources degrades Hong-Ou-Mandel interference visibility. This study quantifies noise impact, aiding development of ideal quantum optical devices.

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Area of Science:

  • Quantum optics
  • Quantum information science

Background:

  • Hong-Ou-Mandel interference is fundamental to quantum technologies.
  • Single-photon sources are key components, but often suffer from multiphoton noise.

Purpose of the Study:

  • To theoretically and experimentally investigate the impact of multiphoton components on Hong-Ou-Mandel interference visibility.
  • To develop a method for diagnosing limitations in current single-photon sources.

Main Methods:

  • Theoretical modeling of interference with multiphoton noise.
  • Experimental verification using quantum dot single-photon sources.
  • Quantifying the mean wave packet overlap of the single-photon component.

Main Results:

  • Unwanted multiphoton components significantly reduce interference visibility.
  • The overlap between single photons and noise photons is a critical factor.
  • The developed approach successfully diagnosed limitations in quantum dot sources.

Conclusions:

  • Multiphoton noise is a primary limitation for high-visibility Hong-Ou-Mandel interference.
  • This work provides a diagnostic tool for advancing single-photon source technology.
  • The findings pave the way for more efficient quantum optical devices.