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Practically state-independent test of contextuality with 9 observables

By Pawel Kurzynski and Dagomir Kaszlikowski


We propose a test of quantum contextuality for a single three-level system that uses nine projective measurements. It has a form of an inequality that has to be satisfied by any non-contextual theory and which is violated by any quantum state, except for the maximally mixed one. Due to the fact that there is only a single state that does not exhibit contextuality, it is natural to ask what the difference between state-independent tests and the one proposed here is.Comment: 3 pages, 1 figur

Topics: Quantum Physics
Year: 2012
DOI identifier: 10.1103/PhysRevA.86.042125
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