离散Weyl信道的Holevo容量
量子物理
2020-03-05 v1
摘要
Holevo容量是量子信道在无纠缠情况下可靠传输经典信息的最大速率。然而,计算任意量子信道的Holevo容量是一项非平凡且计算代价高昂的任务,因为它需要对所有可能输入的量子态进行数值优化。本文考虑离散Weyl信道(DWCs),并利用其对称性将DWC建模为经典对称信道。我们使用简单的计算公式计算了DWC的Holevo容量的下界和上界,并给出了上下界重合的充分必要条件。本文的框架使我们能够刻画大多数已知DWC特例的精确Holevo容量。
引用
@article{arxiv.2003.01942,
title = {Holevo Capacity of Discrete Weyl Channels},
author = {Junaid ur Rehman and Youngmin Jeong and Jeong San Kim and Hyundong Shin},
journal= {arXiv preprint arXiv:2003.01942},
year = {2020}
}
备注
Close to the published version except for some fixed typos and a new proof of Theorem 2 (upper bound on the Holevo capacity). Comments are welcome