Implementation of bright six-partite entanglement by coupled intracavity sum frequency generation
Junfeng Wang, Le Liu, Yuzhu Liu, Ya-Nan Zhang, Hongyan Wu, Chengxuan Gong, Ruofan Zhang, Houyuan Zhang, Jing-yu Fan · Laser Physics Letters · 2018
Abstract Bright six-partite continuous-variable (CV) entanglement generated by the coupled intracavity sum frequency generation is investigated. The entanglement characteristics of reflected pump fields and the output sum frequency fields are discussed theoretically in symmetric and asymmetric cases by applying van Loock and Furusawa criteria for multipartite CV entanglement. Such compact tunable multipartite CV entanglement, generated from an experimentally feasible coupled system, could be used in integrated quantum communication and networks.