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All Quantum Resources Provide an Advantage in Exclusion Tasks.
Uola, Roope; Bullock, Tom; Kraft, Tristan; Pellonpää, Juha-Pekka; Brunner, Nicolas.
Afiliação
  • Uola R; Département de Physique Appliquée, Université de Genève, CH-1211 Genève, Switzerland.
  • Bullock T; QTF Centre of Excellence, Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, FI-20014 Turun yliopisto, Finland.
  • Kraft T; Naturwissenschaftlich-Technische Fakultät, Universität Siegen, Walter-Flex-Str. 3, D-57068 Siegen, Germany.
  • Pellonpää JP; QTF Centre of Excellence, Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, FI-20014 Turun yliopisto, Finland.
  • Brunner N; Département de Physique Appliquée, Université de Genève, CH-1211 Genève, Switzerland.
Phys Rev Lett ; 125(11): 110402, 2020 Sep 11.
Article em En | MEDLINE | ID: mdl-32975968
A key ingredient in quantum resource theories is a notion of measure. Such as a measure should have a number of fundamental properties, and desirably also a clear operational meaning. Here we show that a natural measure known as the convex weight, which quantifies the resource cost of a quantum device, has all the desired properties. In particular, the convex weight of any quantum resource corresponds exactly to the relative advantage it offers in an exclusion (or antidistinguishability) task. After presenting the general result, we show how the construction works for state assemblages, sets of measurements, and sets of transformations. Moreover, in order to bound the convex weight analytically, we give a complete characterization of the convex components and corresponding weights of such devices.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article