title: Quantum contextuality in a single-neutron optical experiment.
abstract: An experimental demonstration of quantum contextuality with neutrons is presented, which intended to exhibit a Kochen-Specker-like phenomenon. Since no perfect correlation is expected in practical experiments, inequalities are derived to distinguish quantitatively the obtained results from predictions by a noncontextual hidden variable theory. Experiments were accomplished with the use of a neutron interferometer combined with spinor manipulation devices. The results clearly violate the prediction of noncontextual theories.
authors.affiliation: Atominstitut der Osterreichischen Universitäten, Stadionallee 2, A-1020 Vienna, Austria.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Rudolf
authors.initials: R
authors.lastname: Loidl
authors.forename: Gerald
authors.initials: G
authors.lastname: Badurek
authors.forename: Matthias
authors.initials: M
authors.lastname: Baron
authors.forename: Helmut
authors.initials: H
authors.lastname: Rauch