State-independent quantum violation of noncontextuality in four dimensional space using five observables and two settings

Details State-independent quantum violation of noncontextuality in four dimensional space using five observables and two settings State-independent quantum violation of noncontextuality in four dimensional space using five observables and two settings

2009-11-21

arxiv.org/abs/0911.4172v1

Physics

Quantum Physics

Scientific paper

Recently, a striking experimental demonstration [G. Kirchmair \emph{et al.}, Nature, \textbf{460}, 494(2009)] of the state-independent quantum mechanical violation of non-contextual realist models has been reported for any two-qubit state using suitable choices of \emph{nine} product observables and \emph{six} different measurement setups. In this report, a considerable simplification of such a demonstration is achieved by formulating a scheme that requires only \emph{five} product observables and \emph{two} different measurement setups. It is also pointed out that the relevant empirical data already available in the experiment by Kirchmair \emph{et al.} corroborate the violation of the NCR models in accordance with our proof.

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