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

References in corpus (2)

• Entanglement-Assisted Classical Capacity of Noisy Quantum Channels
• On some additivity problems in quantum information theory

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