TWO-WAY QUANTUM COMMUNICATION CHANNELS
TWO-WAY QUANTUM COMMUNICATION CHANNELS
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DOI：
10.1142/s0219749906001621
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发表时间：
2005-06
影响因子：
1.2
通讯作者：
Andrew M. Childs;D. Leung;H. Lo
中科院分区：
文献类型：
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作者：
Andrew M. Childs;D. Leung;H. Lo
我们考虑使用二分量子操作的两方之间的通信，这构成了两方通信的最一般的量子力学模型。我们主要关注经典消息的同时向前和向后通信。对于两方共享无限先验纠缠的情形，给出了可达速率区域的内、外界，推广了Shannon的经典结果。特别地，使用班尼特，哈罗，梁，和Smolin的协议，我们给出了一个一次性的表达式在Holevo信息的纠缠辅助的双向量子信道的单向容量。作为应用，我们重新推导了两个已知的单向通道容量的可加性结果：一般单向通道的纠缠辅助容量，和纠缠破坏单向通道的无辅助容量。
We consider communication between two parties using a bipartite quantum operation, which constitutes the most general quantum mechanical model of two-party communication. We primarily focus on the simultaneous forward and backward communication of classical messages. For the case in which the two parties share unlimited prior entanglement, we give inner and outer bounds on the achievable rate region that generalize classical results due to Shannon. In particular, using a protocol of Bennett, Harrow, Leung, and Smolin, we give a one-shot expression in terms of the Holevo information for the entanglement-assisted one-way capacity of a two-way quantum channel. As applications, we rederive two known additivity results for one-way channel capacities: the entanglement-assisted capacity of a general one-way channel, and the unassisted capacity of an entanglement-breaking one-way channel.