Experimental test of quantum contextuality in neutron interferometry.
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.
Bartosik
H
H
Atominstitut der Osterreichischen Universitäten, A-1020 Wien, Austria.
Klepp
J
J
Schmitzer
C
C
Sponar
S
S
Cabello
A
A
Rauch
H
H
Hasegawa
Y
Y