Contextuality within quantum mechanics manifested in subensemble mean values |
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Authors: | Alok Kumar Pan Dipankar Home |
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Institution: | aCAPSS, Department of Physics, Bose Institute, Sector-V, Salt Lake, Calcutta 700091, India |
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Abstract: | For spin-1/2 particles, using a suitable Mach–Zehnder-type setup with a spin-flipper, we argue that it is a direct consequence of the quantum mechanical treatment that an experimentally verifiable subensemble mean of the measured values of an arbitrarily chosen spin variable exhibits dependence on the choice of a comeasurable ‘path’ observable. This, in turn, enables inferring path–spin contextuality at the level of individual measured values of spin that are predetermined using a relevant hidden-variable model applied to our setup. |
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Keywords: | Quantum contextuality Path-spin entanglement Subensemble statistics |
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