中文摘要：

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。

英文摘要：

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.