Quantum optics with diamond color centers coupled to nanophotonic devices

TL;DR

This paper reviews recent progress in quantum networks using diamond silicon-vacancy centers coupled to nanophotonic devices, highlighting their optical and spin properties, quantum nonlinearities, and entanglement capabilities.

Contribution

It provides a comprehensive overview of experimental advances in integrating silicon-vacancy centers with nanophotonics for quantum networking applications.

Findings

Silicon-vacancy centers exhibit coherent optical transitions and long-lived spin states.

Coupling of centers to nanophotonic devices enables quantum nonlinearities at the single-photon level.

Demonstrations of two-emitter entanglement within a single nanophotonic device.

Abstract

We review recent advances towards the realization of quantum networks based on atom-like solid-state quantum emitters coupled to nanophotonic devices. Specifically, we focus on experiments involving the negatively charged silicon-vacancy color center in diamond. These emitters combine homogeneous, coherent optical transitions and a long-lived electronic spin quantum memory. We discuss optical and spin properties of this system at cryogenic temperatures and describe experiments where silicon-vacancy centers are coupled to nanophotonic devices. Finally, we discuss experiments demonstrating quantum nonlinearities at the single-photon level and two-emitter entanglement in a single nanophotonic device.