Dissipative entanglement of solid-state spins in diamond

TL;DR

This paper presents a dissipative method to generate robust entanglement among solid-state spins in diamond, leveraging optical decay and dark state interference, applicable under realistic noise conditions.

Contribution

It introduces a novel dissipative scheme for entangling solid-state spins using optical and microwave fields, resilient to external fluctuations and applicable to various initial states.

Findings

Dissipative entanglement is achievable for any initial spin state.

The scheme is robust against external field fluctuations.

Entanglement can be generated with continuous or pulsed driving under realistic noise.

Abstract

Generating robust entanglement among solid-state spins is key for applications in quantum information processing and precision sensing. We show here a dissipative approach to generate such entanglement among the hyperfine coupled electron nuclear spins using the rapid optical decay of electronic excited states. The combined dark state interference effects of the optical and microwave driving fields in the presence of spontaneous emission from the short-lived excited state leads to a dissipative formation of an entangled steady state. We show that the dissipative entanglement is generated for any initial state conditions of the spins and is resilient to external field fluctuations. We analyze the scheme both for continuous and pulsed driving fields in the presence of realistic noise sources.