Title

Upper bound on the classical capacity of a quantum channel assisted by classical feedback

Document Type

Conference Proceeding

Publication Date

7-12-2021

Abstract

We introduce various measures of forward classical communication for bipartite quantum channels. Since a point-to-point channel is a special case of a bipartite channel, the measures reduce to measures of classical communication for point-to-point channels. As it turns out, these reduced measures have been reported in prior work of Wang et al. on bounding the classical capacity of a quantum channel. As an application, we show that the reduced measures are upper bounds on the classical capacity of a point-to-point quantum channel assisted by a classical feedback channel. Some of the various measures can be computed by semi-definite programming.

Publication Source (Journal or Book title)

IEEE International Symposium on Information Theory - Proceedings

First Page

906

Last Page

911

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