Experimental violation of Bell's inequality beyond Tsirelson's bound.
The correlations between two qubits belonging to a three-qubit system can violate the Clauser-Horne-Shimony-Holt-Bell inequality beyond Tsirelson'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.
Chen
Yu-Ao
YA
Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany. yuao@physi.uni-heidelberg.de
Yang
Tao
T
Zhang
An-Ning
AN
Zhao
Zhi
Z
Cabello
Adán
A
Pan
Jian-Wei
JW