A variant of Peres-Mermin proof for testing noncontextual realist models
CAPSS, Department of Physics, Bose Institute, Sector-V - Salt Lake, Calcutta 700091, India
Corresponding author: email@example.com
Accepted: 11 May 2010
For any state in a four-dimensional system, the quantum violation of an inequality based on the Peres-Mermin proof for testing noncontextual realist models has experimentally been corroborated. In the Peres-Mermin proof, an array of nine holistic observables for two two-qubit systems was used. In this letter, we present a new symmetric set of observables for the same system which also provides a contradiction of quantum mechanics with noncontextual realist models in a state-independent way. The whole argument can also be cast in the form of a new inequality that can be empirically tested.
PACS: 03.65.Ta – Foundations of quantum mechanics; measurement theory
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