Kochen-Specker contextuality
Costantino Budroni, Adán Cabello, Otfried Gühne, Matthias Kleinmann, Jan-Åke Larsson
Abstract
A realization that came gradually in physics is that the ``elements of reality'' of Einstein, Podolsky, and Rosen are provably nonexistent. Specker initiated a line of thinking in 1960, observing that the outcomes of quantum measurements cannot reveal preexisting properties that are independent of which other measurements are performed. This review discusses the diverse current thinking on the problem of contextuality. The possibilities and problems with experimental verifications are discussed, and the violation of Bell inequalities can be viewed as a special case of contextuality.
Topics & Concepts
Kochen–Specker theoremQuantum nonlocalityPhysicsTheoretical physicsMathematical proofQuantumQuantum mechanicsMathematicsQuantum entanglementGeometryQuantum Mechanics and ApplicationsQuantum Information and CryptographyQuantum Computing Algorithms and Architecture