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arXiv:1307.6820 · The European Physical Journal D

Generation of four-photon polarization entangled state based on Einstein-Podolsky-Rosen entanglers

Meiyu Wang, Fengli Yan

Published Feb 1, 2014• 10 citations
arXivHTMLPDF
DOI
10.1140/epjd/e2013-40295-x

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We obtain a four-photon polarization-entangled state with a visibility as high as $(95.35\ifmmode\pm\else\textpm\fi{}0.45)%$ directly from a single down-conversion source. A success probability of $(81.54\ifmmode\pm\else\textpm\fi{}1.38)%$ is observed by applying this entangled state to realize a four-party quantum communication complexity scenario, which comfortably surpasses the classical limit of 50%. As a comparison, two Einstein-Podolsky-Rosen pairs are shown to implement the scenario with a success probability of $(73.89\ifmmode\pm\else\textpm\fi{}1.33)%$. This four-photon state can also be used to fulfill decoherence-free quantum information processing and other advanced quantum communication schemes.