Experimentally testable state-independent quantum contextuality

Phys Rev Lett. 2008 Nov 21;101(21):210401. doi: 10.1103/PhysRevLett.101.210401. Epub 2008 Nov 19.

Abstract

We show that there are Bell-type inequalities for noncontextual theories that are violated by any quantum state. One of these inequalities between the correlations of compatible measurements is particularly suitable for testing this state-independent violation in an experiment.