All-versus-nothing violation of local realism by two-photon, four-dimensional entanglement

Phys Rev Lett. 2005 Dec 9;95(24):240406. doi: 10.1103/PhysRevLett.95.240406. Epub 2005 Dec 9.

Abstract

We develop and exploit a source of two-photon, four-dimensional entanglement to report the first two-particle all-versus-nothing test of local realism with a linear optics setup, but without resorting to a noncontextuality assumption. Our experimental results are in good agreement with quantum mechanics while in extreme contradiction to local realism. Potential applications of our experiment are briefly discussed.