Contextuality within quantum mechanics manifested in subensemble mean values

Details Contextuality within quantum mechanics manifested in subensemble mean values Contextuality within quantum mechanics manifested in subensemble mean values

2009-12-18

arxiv.org/abs/0912.3570v1

Phys. Lett. A, 373, 3430(2009).

Physics

Quantum Physics

6 pages, 1 figure

Scientific paper

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 \textit{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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