|| Upper bound on the classical capacity of a quantum channel assisted by classical feedback
||Dawei Ding, Alibaba Group, United States; Sumeet Khatri, Louisiana State University, United States; Yihui Quek, Stanford University, United States; Peter Shor, Massachusetts Institute of Technology, United States; Xin Wang, Baidu Research, United States; Mark Wilde, Louisiana State University, United States|
||D2-S6-T4: Classical Quantum Communication Channels
||Tuesday, 13 July, 23:40 - 00:00
||Wednesday, 14 July, 00:00 - 00:20
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.