title: Experimental test of quantum contextuality in neutron interferometry.
abstract: We performed an experimental test of the Kochen-Specker theorem based on an inequality derived from the Peres-Mermin proof, using spin-path (momentum) entanglement in a single neutron system. Following the strategy proposed by Cabello et al. [Phys. Rev. Lett. 100, 130404 (2008)10.1103/PhysRevLett.100.130404], a Bell-like state was generated, and three expectation values were determined. The observed violation 2.291 +/- 0.008 not less, dbl equals1 clearly shows that quantum mechanical predictions cannot be reproduced by noncontextual hidden-variable theories.
authors: Atominstitut der Osterreichischen Universitäten, A-1020 Wien, Austria.
authors: H
authors: H
authors: Bartosik
authors: J
authors: J
authors: Klepp
authors: C
authors: C
authors: Schmitzer
authors: S
authors: S
authors: Sponar
authors: A
authors: A
authors: Cabello
authors: H
authors: H
authors: Rauch
authors: Y
authors: Y
authors: Hasegawa