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arXiv · 1404.4172

Compatibility properties of extreme quantum observables

Erkka Haapasalo·Juha-Pekka Pellonpää·Roope Uola
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Abstract

Recently a problem concerning the equivalence of joint measurability and coexistence of quantum observables was solved [15]. In this paper we generalize two known joint measurability results from sharp observables to the class of extreme observables and study relationships between coexistence, joint measurability, and post-processing of quantum observables when an extreme observable is involved. We also discuss another notion of compatibility and provide a counterexample separating this from the former notions.

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Erkka Haapasalo, Juha-Pekka Pellonpää, Roope Uola. 2015-08-18. Compatibility properties of extreme quantum observables. https://doi.org/10.1007/s11005-015-0754-1

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