Concentration on partially entangled W-class states on nitrogen-vacancy centers assisted by microresonator
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-06-27 |
| Journal | Journal of the Optical Society of America B |
| Authors | Cong Cao, Tie-Jun Wang, Ru Zhang, Chuan Wang |
| Institutions | Beijing University of Posts and Telecommunications |
| Citations | 10 |
Abstract
Section titled āAbstractāWe propose an entanglement concentration protocol (ECP) for spatially separated negatively charged nitrogen-vacancy (N-V) centers in a partially entangled W state, resorting to a hybrid quantum circuit and some ancillary single photons. The hybrid quantum circuit is composed of a single N-V center coupled on the periphery of a microtoroidal resonator and linear-optical elements. Exploiting currently available techniques (for example, the single-photon input-output process), the standard maximally entangled W state could be distilled from the initial partially entangled W state. Compared with other ECPs for W-class states, we discuss the advantages of the present protocol. Further, the feasibility and the experimental challenges of the protocol are discussed by considering currently available techniques.