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Quantum f-divergences in von Neumann algebras: reversibility of quantum operations

Relative entropy has played a significant role in various fields of mathematics and physics as the quantum version of the Kullback–Leibler divergence in classical theory. Many variations of relative entropy have been introduced so far with applications to quantum information and related subjects. Ty...

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Autor principal: Hiai, Fumio
Lenguaje:eng
Publicado: Springer 2021
Materias:
Acceso en línea:https://dx.doi.org/10.1007/978-981-33-4199-9
http://cds.cern.ch/record/2752786
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author Hiai, Fumio
author_facet Hiai, Fumio
author_sort Hiai, Fumio
collection CERN
description Relative entropy has played a significant role in various fields of mathematics and physics as the quantum version of the Kullback–Leibler divergence in classical theory. Many variations of relative entropy have been introduced so far with applications to quantum information and related subjects. Typical examples are three different classes, called the standard, the maximal, and the measured f-divergences, all of which are defined in terms of (operator) convex functions f on (0,∞) and have respective mathematical and information theoretical backgrounds. The α-Rényi relative entropy and its new version called the sandwiched α-Rényi relative entropy have also been useful in recent developments of quantum information. In the first half of this monograph, the different types of quantum f-divergences and the Rényi-type divergences mentioned above in the general von Neumann algebra setting are presented for study. While quantum information has been developing mostly in the finite-dimensional setting, it is widely believed that von Neumann algebras provide the most suitable framework in studying quantum information and related subjects. Thus, the advance of quantum divergences in von Neumann algebras will be beneficial for further development of quantum information. Quantum divergences are functions of two states (or more generally, two positive linear functionals) on a quantum system and measure the difference between the two states. They are often utilized to address such problems as state discrimination, error correction, and reversibility of quantum operations. In the second half of the monograph, the reversibility/sufficiency theory for quantum operations (quantum channels) between von Neumann algebras via quantum f-divergences is explained, thus extending and strengthening Petz' previous work. For the convenience of the reader, an appendix including concise accounts of von Neumann algebras is provided.
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spelling cern-27527862021-04-21T16:43:35Zdoi:10.1007/978-981-33-4199-9http://cds.cern.ch/record/2752786engHiai, FumioQuantum f-divergences in von Neumann algebras: reversibility of quantum operationsMathematical Physics and MathematicsRelative entropy has played a significant role in various fields of mathematics and physics as the quantum version of the Kullback–Leibler divergence in classical theory. Many variations of relative entropy have been introduced so far with applications to quantum information and related subjects. Typical examples are three different classes, called the standard, the maximal, and the measured f-divergences, all of which are defined in terms of (operator) convex functions f on (0,∞) and have respective mathematical and information theoretical backgrounds. The α-Rényi relative entropy and its new version called the sandwiched α-Rényi relative entropy have also been useful in recent developments of quantum information. In the first half of this monograph, the different types of quantum f-divergences and the Rényi-type divergences mentioned above in the general von Neumann algebra setting are presented for study. While quantum information has been developing mostly in the finite-dimensional setting, it is widely believed that von Neumann algebras provide the most suitable framework in studying quantum information and related subjects. Thus, the advance of quantum divergences in von Neumann algebras will be beneficial for further development of quantum information. Quantum divergences are functions of two states (or more generally, two positive linear functionals) on a quantum system and measure the difference between the two states. They are often utilized to address such problems as state discrimination, error correction, and reversibility of quantum operations. In the second half of the monograph, the reversibility/sufficiency theory for quantum operations (quantum channels) between von Neumann algebras via quantum f-divergences is explained, thus extending and strengthening Petz' previous work. For the convenience of the reader, an appendix including concise accounts of von Neumann algebras is provided.Springeroai:cds.cern.ch:27527862021
spellingShingle Mathematical Physics and Mathematics
Hiai, Fumio
Quantum f-divergences in von Neumann algebras: reversibility of quantum operations
title Quantum f-divergences in von Neumann algebras: reversibility of quantum operations
title_full Quantum f-divergences in von Neumann algebras: reversibility of quantum operations
title_fullStr Quantum f-divergences in von Neumann algebras: reversibility of quantum operations
title_full_unstemmed Quantum f-divergences in von Neumann algebras: reversibility of quantum operations
title_short Quantum f-divergences in von Neumann algebras: reversibility of quantum operations
title_sort quantum f-divergences in von neumann algebras: reversibility of quantum operations
topic Mathematical Physics and Mathematics
url https://dx.doi.org/10.1007/978-981-33-4199-9
http://cds.cern.ch/record/2752786
work_keys_str_mv AT hiaifumio quantumfdivergencesinvonneumannalgebrasreversibilityofquantumoperations