Dissipative preparation of entangled states between two spatially separated nitrogen-vacancy centers

TL;DR

This paper proposes a new method to generate entangled states between two distant nitrogen-vacancy centers using dissipative processes in microresonator systems, enhancing quantum communication capabilities.

Contribution

It introduces a dissipative scheme for entangling spatially separated NV centers via microresonators, leveraging cavity decay to steer the system into a desired entangled state.

Findings

Steady state can be driven into a singlet-like entangled state

Cavity decay aids in the entanglement process

Potential for quantum communication applications

Abstract

We present a novel scheme for the generation of entangled states of two spatially separated nitrogen-vacancy (NV) centers with two whispering-gallery-mode (WGM) microresonators, which are coupled either by an optical fiber-taper waveguide, or by the evanescent fields of the WGM. We show that, the steady state of the two NV centers can be steered into a singlet-like state through a dissipative quantum dynamical process, where the cavity decay plays a positive role and can help drive the system to the target state. The protocol may open up promising perspectives for quantum communications and computations with this solid-state cavity quantum electrodynamic system.