Preparating Quantum Entanglement Between Microtoroidal-Resonator–Mediated Nitrogen-Vacancy Centers in Diamond.

We propose a scheme to prepare entangled states between solid-state nitrogen-vacancy (NV) centers. In our scheme, NV centers are coupled to the whispering-gallery modes of microtoroidal resonators (MTRs). With a protocaled polarized photon input and measurement of single-photon detector, NV centers will be projected on entangled states with the assistance of the special input-output process of polarized photon in MTRs. More importantly, both Bell and W state can be generated with our optical system. This scheme provides a physical feasibility for entangling NV centers, and maybe pave the way towards NV center-based quantum information processing (QIP). [ABSTRACT FROM AUTHOR]