含噪多址量子信道容量定理的求证与应用  

Proof of Capacity Theorem of Noisy Multiple Access Quantum Channels and Its Application

作　　者：刘静[1] 赵生妹[1] 

机构地区：[1]南京邮电大学信号处理与传输研究院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2008年第6期44-49,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60672133);江苏省自然科学基础研究计划(BK2006236);南京邮电大学科研基金(NY206020)资助项目

摘　　要：含噪多址量子信道的容量研究是实现量子多用户通信的基础。文中利用经典-量子纠缠产生编码定理和量子-量子纠缠产生编码定理求证了含噪多址量子信道容量定理,获得了含噪多址量子信道的经典-量子容量区域和量子-量子容量区域,并将该定理应用到多址量子相位翻转信道中,计算得到量子相位翻转信道的量子-量子容量区域,结果验证了容量定理的有效性,得到量子-量子容量区域是五边形区域。为了计算简便且不失一般性,求证过程考虑采用两输入-单输出信道的含噪多址量子信道模型。Research on capacity of noisy multiple access quantum channels is the basis of the quantum muhiuser communications. According to the classical-quantum entanglement generation theorem and the quantum-quantum entanglement generation theorem, the capacity regions, comprised classical-quantum region and quantum-quantum region ,and noisy multiple access quantum channels are deduced in this paper. Then,the theorem is applied to the computation of quantum-quantum capacity region of the multiple access phase-flip channel, and the result The result verifies the theorem, and the quantum-quantum capacity region turns out to be a pentagonal region. For sim- plicity and generality, we consider the multiple access quantum channels with two senders and one receiver.

关 键 词：含噪多址量子信道 容量区域 相干信息 全局态 可达速率对 量子相位翻转信道 

分 类 号：TN911.2[电子电信—通信与信息系统]