多址量子退极化信道的信道容量  

Capacity of the quantum multiple access depolarizing channel

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：《量子电子学报》2008年第4期437-442,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60672133);江苏省基础研究计划(BK2006236);教育部博士点专项基金(20060293003);江苏省青蓝工程(TJ207006)

摘　　要：量子退极化信道是一类重要的量子噪声信道。为了计算简单且不失一般性,选取两输入、一输出的多用户模型,对量子退极化信道的容量进行研究,从理论上获得基于量子退极化信道的经典量子容量区域和量子容量区域。前者是一个用户发送经典信息而另一个用户发送量子信息的速率区域,后者是两个用户都发送量子信息的速率区域,并对多址量子退极化信道的性能进行分析。The depolarizing channel is one of the basic quantum channels. For simplicity and generality, quantum channels with two senders and one receiver are considered to discuss the capacity of the quantum depolarizing channel. Two different capacity regions, classical-quantum region and quantum-quantum region, are deduced in theory for the quantum depolarizing channels with two senders and one receiver. The first region is comprised of the rates at which it is achievable for one sender to transmit classical information, while the other to send quantum information. The other region consists of the rates at which each sender sends quantum information. At the same time, the performance of the quantum multiple access depolarizing channel is analyzed.

关 键 词：量子信息 信道容量 多用户信道 量子退极化信道 全局量子态 

分 类 号：O413[理学—理论物理] TN918[理学—物理]