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Quantum Contextuality in a Single-Neutron Optical Experiment

2006; American Physical Society; Volume: 97; Issue: 23 Linguagem: Inglês

10.1103/physrevlett.97.230401

1092-0145

Yuji Hasegawa, Rudolf Loidl, G. Badurek, Matthias Baron, Helmut Rauch,

Statistical Mechanics and Entropy

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.