Indistinguishable photons from separated silicon-vacancy centers in diamond

TL;DR

This paper demonstrates that silicon-vacancy centers in diamond can produce indistinguishable photons suitable for quantum networking, highlighting their spectral stability and potential for scalable quantum communication.

Contribution

The study shows for the first time that SiV centers in diamond can generate indistinguishable photons via HOM interference, emphasizing their suitability for quantum network nodes.

Findings

Successful generation of indistinguishable photons from separate SiV centers.

Spectral properties of SiV centers enable coherent photon emission.

Potential application in quantum network nodes.

Abstract

We demonstrate that silicon-vacancy (SiV) centers in diamond can be used to efficiently generate coherent optical photons with excellent spectral properties. We show that these features are due to the inversion symmetry associated with SiV centers, and demonstrate generation of indistinguishable single photons from separate emitters in a Hong-Ou-Mandel (HOM) interference experiment.Prospects for realizing efficient quantum network nodes using SiV centers are discussed.