



01025nas a2200121   4500008004100000245007200041210006900113260001500182520063400197100001700831700001800848856003700866       2010                        eng d00aContextuality in Quantum Mechanics: Testing the Klyachko Inequality0 aContextuality in Quantum Mechanics Testing the Klyachko Inequali  c2010/06/023 a  The Klyachko inequality is an inequality for the probabiities of the values
of five observables of a spin-1 particle, which is satisfied by any
noncontextual assignment of values to this set of observables, but is violated
by the probabilities defined by a certain quantum state. We describe an
experiment between two entangled spin-1 particles to test contextuality via a
related inequality. We point out that a test of contextuality by measurements
on a single particle to confirm the Klyachko inequality requires an assumption
of non-disturbance by the measuring instrument, which is avoided in the
two-particle experiment.
1 aBub, Jeffrey1 aStairs, Allen  uhttp://arxiv.org/abs/1006.0500v2