Remarks on the classical capacity of quantum channel

Abstract

A direct proof of the relation between the one-shot classical capacity and the minimal output entropy for covariant quantum channels is suggested. The structure of covariant channels is described in some detail. A simple proof of a general inequality for entanglement-assisted classical capacity is given.

6 pages

Cited by in corpus (2)

• Additivity of minimal entropy output for a class of covariant channels
• Note on multiple additivity of minimal Renyi entropy output of the Werner-Holevo channels