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Related Concept Videos

The de Broglie Wavelength02:32

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

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Related Experiment Video

Updated: May 23, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

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Published on: October 13, 2017

Subnatural linewidth single photons from a quantum dot.

Clemens Matthiesen1, Anthony Nickolas Vamivakas, Mete Atatüre

  • 1Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom. cm467@cam.ac.uk

Physical Review Letters
|April 3, 2012
PubMed
Summary
This summary is machine-generated.

Researchers generated high-coherence quantum light using single quantum dots. This solid-state approach produces subnatural linewidth single photons with extended coherence times, paving the way for future quantum technologies.

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Related Experiment Videos

Last Updated: May 23, 2026

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Area of Science:

  • Quantum Optics
  • Solid-State Physics
  • Nanotechnology

Background:

  • Quantum dots are promising solid-state systems for generating single photons.
  • Previous methods often struggled to achieve narrow linewidths and high coherence.

Purpose of the Study:

  • To develop a solid-state method for generating single photons with subnatural linewidths.
  • To achieve high-coherence quantum light from a single quantum dot.
  • To explore the potential for generating decoherence-free, phase-locked single photons.

Main Methods:

  • Utilizing resonance fluorescence in the small Rabi frequency (Heitler) regime.
  • Operating with a single quantum dot as the light source.
  • Performing intensity-correlation measurements.

Main Results:

  • Generated single photons with subnatural linewidths and high coherence.
  • Achieved single-photon coherence 30 times longer than the quantum dot transition lifetime.
  • Observed strong photon antibunching and vanishing two-photon scattering.

Conclusions:

  • The developed method offers a novel solid-state approach for high-quality single photon generation.
  • This technique is a significant step towards generating decoherence-free, phase-locked single photons from multiple quantum systems.