Jan

27

2021

Quantum f-Divergences in von Neumann Algebras: Reversibility of Quantum Operations

Laser 27 Jan 2021 18:35 LEARNING » e-book

Quantum f-Divergences in von Neumann Algebras: Reversibility of Quantum Operations
English | 2021 | ISBN-13: 978-9813341982 | 204 Pages | True (PDF, EPUB) | 15.86 MB

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.



DOWNLOAD
uploadgig



rapidgator


nitroflare

High Speed Download

Add Comment

  • People and smileys emojis
    Animals and nature emojis
    Food and drinks emojis
    Activities emojis
    Travelling and places emojis
    Objects emojis
    Symbols emojis
    Flags emojis