MONOTONICITY OF QUANTUM RELATIVE ENTROPY REVISITED

Author:

PETZ DÉNES1

Affiliation:

1. Department for Mathematical Analysis, Budapest University of Technology and Economics, H-1521 Budapest XI., Hungary

Abstract

Monotonicity under coarse-graining is a crucial property of the quantum relative entropy. The aim of this paper is to investigate the condition of equality in the monotonicity theorem and in its consequences as the strong sub-additivity of von Neumann entropy, the Golden–Thompson trace inequality and the monotonicity of the Holevo quantitity. The relation to quantum Markov states is briefly indicated.

Publisher

World Scientific Pub Co Pte Lt

Subject

Mathematical Physics,Statistical and Nonlinear Physics

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