Deterministic conversion of a four-photon GHZ state to a W state via homodyne measurement

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...

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Published inOptics express Vol. 24; no. 14; pp. 15319 - 15327
Main Authors Cui, Wen-Xue, Hu, Shi, Wang, Hong-Fu, Zhu, Ai-Dong, Zhang, Shou
Format Journal Article
LanguageEnglish
Published United States 11.07.2016
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Summary: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).
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.015319