Eur. Phys. J. D (2012) 66: 62
https://doi.org/10.1140/epjd/e2012-20165-y

Regular Article

Quantum violation of noncontextuality for separable states using fewer measurement settings

¹ LPTM (CNRS Unité 8089), Université de Cergy-Pontoise, 95302 Cergy-Pontoise Cedex, France
² CAPSS, Department of Physics, Bose Institute, Salt Lake, 700091 Kolkata, India

^a e-mail: alok.pan@u-cergy.fr

Received: 18 March 2011
Received in final form: 16 January 2012
Published online: 6 March 2012

Abstract

The state-independent quantum violation of non-contextual realist models has been demonstrated both theoretically and experimentally for any two-qubit state using suitable choices of nine product observables and six different measurement setups. In this paper, for the separable states, a considerable simplification of such a demonstration is achieved by formulating a scheme that requires only five product observables and two different measurement setups.