Contextuality and nonlocality using intraparticle path-spin entanglement

by Dr A. K. Pan (Centre for Astroparticle Physics Bose Institute Calcutta, India)

Friday 8 May 2009, 15:00 → 16:00 Europe/Rome

Aula 8 (Dipartimento di Fisica-Ed. E.Fermi)

For spin-1/2 particles, we argue that for a suitable setup generating path-spin entanglement, it is a direct consequence of the quantum mechanical treatment that the experimentally verifiable subensembles spin mean values exhibit dependence on the choice of a comeasurable path observable. Further, in terms of a suitable variant of the EPR-Bohm example, we argue that the quantum violation of the path-spin noncontextual realist inequality for the above intraparticle path-spin entanglement can be used to infer a type of nonlocality that is required for the hidden variable models to be compatible with the quantum mechanical treatment of an EPR-Bohm `interparticle' entanglement.