Note on quantum dynamical entropies

Noboru Watanabe

Frank Hansen

Noboru Watanabe

Quantum entropy and channel are fundamental concepts for quantum information theory progressed recently in various directions. We will review the fundamental aspects of mean entropy and mean mutual entropy and calculate them for open system dynamics.

Noboru Watanabe

Noboru Watanabe, Andrei Yu. Khrennikov

Noboru Watanabe, Masahiro Muto

Transmitted complexity (mutual entropy) is one of the important measures for quantum information theory developed recently in several ways. We will review the fundamental concepts of the Kossakowski, Ohya and Watanabe entropy and define a transmitted complexity for quantum dynamical systems.This article is part of the themed issue 'Second quantum revolution: foundational questions'.