title: Deterministic conversion of a four-photon GHZ state to a W state via homodyne measurement.
abstract: We propose a specific method for converting a four-photon Greenberger-Horne-Zeilinger (GHZ) state to a W state in a deterministic way by using linear optical elements, cross-Kerr nonlinearities, and homodyne measurement. We consider the effects of the quadrature homodyne measurements on the fidelity of the W state and the experimental feasibility of the proposed scheme. This might provide great prospects for converting multipartite entangled states into each other for future optical quantum information processing (QIP).
authors.forename: Wen-Xue
authors.initials: WX
authors.lastname: Cui
authors.forename: Shi
authors.initials: S
authors.lastname: Hu
authors.forename: Hong-Fu
authors.initials: HF
authors.lastname: Wang
authors.forename: Ai-Dong
authors.initials: AD
authors.lastname: Zhu
authors.forename: Shou
authors.initials: S
authors.lastname: Zhang