Continuous monitoring can improve indistinguishability of a single-photon source

Abstract

A new engineering technique using continuous quantum measurement in conjunction with feed-forward is proposed to improve indistinguishability of a single-photon source. The technique involves continuous monitoring of the state of the emitter, processing the noisy output signal with a simple linear estimation algorithm, and feed forward to control a variable delay at the output. In the weak coupling regime, the information gained by monitoring the state of the emitter is used to reduce the time uncertainty inherent in photon emission from the source, which improves the indistinguishability of the emitted photons.

4 pages, 4 figures

References in corpus (4)

• Spins in few-electron quantum dots
• Single-shot read-out of an individual electron spin in a quantum dot
• Review: Semiconductor Quantum Light Sources
• A Straightforward Introduction to Continuous Quantum Measurement

Cited by in corpus (4)

• Single-shot characterization of photon indistinguishability with dielectric metasurfaces
• Improving quantum dot based single-photon source with continuous measurements
• Continuous quantum correction on Markovian and Non-Markovian models
• Using the Autler-Townes and ac Stark effects to optically tune the frequency of indistinguishable single-photons from an on-demand source