We propose efficient schemes for converting three-photon, four-photon and five-photon GHZ state to a W state or Dicke state, respectively with the nitrogen-vacancy (N-V) centers via single-photon input-output process and cross-Kerr nonlinearities. The total success probability can be improved by iterating the conversion process for the case of three-photon and five-photon while it does not require iteration for converting four-photon GHZ state to a W state. The analysis of feasibility shows that our scheme is feasible for current experimental technology.
@article{arxiv.1710.06216,
title = {Conversion of entangled states with nitrogen-vacancy centers coupled to microtoroidal resonators},
author = {Y. Q. Ji and X. Q. Shao and X. X. Yi},
journal= {arXiv preprint arXiv:1710.06216},
year = {2017}
}