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A Complete Graphical Calculus for Spekkens' Toy Bit Theory

2015
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Foundations of physics
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While quantum theory cannot be described by a local hidden variable model, it is nevertheless possible to construct such models that exhibit features commonly associated with quantum mechanics. These models are also used to explore the question of ψ-ontic versus ψ-epistemic theories for quantum mechanics. Spekkens' toy theory is one such model. It arises from classical probabilistic mechanics via a limit on the knowledge an observer may have about the state of a system. The toy theory for the

doi:10.1007/s10701-015-9957-7
fatcat:vtnfcnci6bdkdniwdlznmx6ymu