What is it about?

Individual single-photon sources based on photon pair production are inherently probabilistic. That means that when a photon is called for, it is a roll of the dice as to whether you get that photon. By multiplexing several single-photon sources together, it is possible to make a system that greatly increases your odds of getting a single photon when you request it. This enhancement in the emission probability is achieved without the degradation in single-photon quality that typically occurs when trying trying to increase the emission probability. We review this field.

Featured Image

Why is it important?

Many quantum information and measurement applications depend critically on the emission probability of a single photon source. That dependence can be very strict. That is if the emission probability is below some level the application becomes impractical or even impossible. Single-photon sources with high efficiencies would be a boon for many applications.

Perspectives

This is a technique that originated 2 decades ago and there has been much improvement since. I find it an interesting story to see what has been a very difficult technical problem make real advances and flower into a number of unforeseen approaches to implement the original concept and move toward the goal of making a more ideal single photon source.

Alan Migdall
Joint Quantum Institute

Read the Original

This page is a summary of: Single-photon sources: Approaching the ideal through multiplexing, Review of Scientific Instruments, April 2020, American Institute of Physics, DOI: 10.1063/5.0003320.
You can read the full text:

Read

Contributors

The following have contributed to this page