Implementation of quantum repeaters based on nitrogen-vacancy centers via coupling to microtoroid resonators

Abstract

We investigate a hybrid entanglement distribution protocol based upon nitrogen vacancy centers and microtoroid resonators. The protocol is based on the input–output relation on the nitrogen-vacancy center and microresonator coupling, and the entanglement can be distributed between photons and solid state qubits with the assistance of microcavity resonance. The protocol can be further generalized to quantum repeaters by introducing entanglement purification and entanglement swapping. As solid state systems are promising candidates for long distance quantum communication, the proposed protocol enables the distant parties to achieve scalable distribution of entanglement. We also discussed the practical performance and possible experimental realizations.