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Related Experiment Video

Updated: Jul 4, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

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Perfect single-photon sources.

Sana Khalid1, Fabrice P Laussy2

  • 1Faculty of Science and Engineering, University of Wolverhampton, Wulfruna St, Wolverhampton, WV1 1LY, UK.

Scientific Reports
|February 1, 2024
PubMed
Summary
This summary is machine-generated.

We introduce a gapped coherent state for single-photon sources (SPS) with a minimum time gap between photons. Numerical simulations reveal counter-intuitive statistical properties, connecting stationary and pulsed photon emission.

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Area of Science:

  • Quantum Optics
  • Photonics
  • Statistical Physics

Background:

  • Single-photon sources (SPS) are crucial for quantum technologies.
  • Understanding photon statistics is key to characterizing SPS.
  • Existing sources often produce uncorrelated or bunched photons.

Purpose of the Study:

  • To introduce and analyze the statistical properties of a hypothetical gapped coherent state.
  • To explore the connection between continuous-wave and pulsed single-photon sources.
  • To investigate the implications for defining 'perfect' single-photon emission.

Main Methods:

  • Numerical simulation of a single-photon stream with a defined time gap.
  • Generating an uncorrelated (Poissonian) signal as a baseline.
  • Modifying the photon list to enforce the time gap constraint.

Main Results:

  • The gapped coherent state exhibits unique, counter-intuitive statistical features.
  • A clear link is established between stationary and pulsed single-photon emission.
  • The study offers insights into the ideal characteristics of single-photon sources.

Conclusions:

  • The gapped coherent state provides a novel theoretical framework for photon statistics.
  • This model bridges the gap between different types of single-photon sources.
  • It refines the understanding of what constitutes ideal single-photon emission.