Upper bound on the classical capacity of a quantum channel assisted by classical feedback
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
Ding, D., Khatri, S., Quek, Y., Shor, P., Wang, X., & Wilde, M. (2021). Upper bound on the classical capacity of a quantum channel assisted by classical feedback. IEEE International Symposium on Information Theory - Proceedings, 2021-July, 906-911. https://doi.org/10.1109/ISIT45174.2021.9518046