Experimental entangled entanglement |
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Authors: | Walther Philip Resch Kevin J Brukner Caslav Zeilinger Anton |
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Institution: | Institut für Experimentalphysik, Universit?t Wien, Boltzmanngasse 5, A-1090 Wien, Austria. |
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Abstract: | All previous tests of local realism have studied correlations between single-particle measurements. In the present experiment, we have performed a Bell experiment on three particles in which one of the measurements corresponds to a projection onto a maximally entangled state. We show theoretically and experimentally that correlations between these entangled measurements and single-particle measurements are too strong for any local-realistic theory and are experimentally exploited to violate a Clauser-Horne-Shimony-Holt-Bell inequality by more than 5 standard deviations. We refer to this possibility as "entangled entanglement." |
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