Experimental Violation of Bell Inequality beyond Cirel'son's Bound

Details Experimental Violation of Bell Inequality beyond Cirel'son's Bound Experimental Violation of Bell Inequality beyond Cirel'son's Bound

2006-07-27

arxiv.org/abs/quant-ph/0607194v1

Phys. Rev. Lett. 97, 170408 (2006)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.97.170408

The correlations between two qubits belonging to a three-qubit system can violate the Clauser-Horne-Shimony-Holt-Bell inequality beyond Cirel'son's bound [A. Cabello, Phys. Rev. Lett. 88, 060403 (2002)]. We experimentally demonstrate such a violation by 7 standard deviations by using a three-photon polarization-entangled Greenberger-Horne-Zeilinger state produced by Type-II spontaneous parametric down-conversion. In addition, using part of our results, we obtain a violation of the Mermin inequality by 39 standard deviations.

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