The classical capacity of quantum channels with memory

Dorlas, T. C. and Morgan, Ciara (2008) The classical capacity of quantum channels with memory. Physical Review A, 79 (3). ISSN 1050-2947

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Abstract

We investigate the classical capacity of two quantum channels with memory: a periodic channel with depolarizing channel branches, and a convex combination of depolarizing channels. We prove that the capacity is additive in both cases. As a result, the channel capacity is achieved without the use of entangled input states. In the case of a convex combination of depolarizing channels the proof provided can be extended to other quantum channels whose classical capacity has been proved to be additive in the memoryless case.

Item Type:	Article
Divisions:	School of Theoretical Physics > Preprints
Date Deposited:	05 Oct 2017 19:18
Last Modified:	15 Dec 2022 03:05
URI:	https://dair.dias.ie/id/eprint/228

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