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arXiv · 0802.4248

Coexistence of qubit effects

Peter Stano·Daniel Reitzner·Teiko Heinosaari
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Abstract

We characterize all coexistent pairs of qubit effects. This gives an exhaustive description of all pairs of events allowed, in principle, to occur in a single qubit measurement. The characterization consists of three disjoint conditions which are easy to check for a given pair of effects. Known special cases are shown to follow from our general characterization theorem.

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Peter Stano, Daniel Reitzner, Teiko Heinosaari. 2008-07-09. Coexistence of qubit effects. https://doi.org/10.1103/physreva.78.012315

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