Abstracts
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Quantifying the incompatibility of quantum measurements Relative to a Basis
Presenting Author: Paolo Zanardi, University of Southern California
Contributing Author(s): Georgios Styliaris
Motivated by quantum resource theories, we introduce a notion of incompatibility for quantum measurements relative to a reference basis. The notion arises by considering states diagonal in that basis and investigating whether probability distributions associated with different quantum measurements can be converted into one another by probabilistic postprocessing. The induced preorder over quantum measurements is directly related to multivariate majorization and gives rise to families of monotones, i.e., scalar quantifiers that preserve the ordering. For the case of orthogonal measurement we establish a quantitative connection between incompatibility, quantum coherence and entropic uncertainty relations. We generalize the construction to include arbitrary positive-operator-valued measurements and report complete families of monotones
Read this article online: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.070401
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