A brief general review is presented of the theory of information transmission capacities of quantum communication channels, which is a development of the classical Shannon theory. Unlike a classical communication channel, a quantum channel is characterised by a whole set of different capacities, which depend on the type of transmitted information (classical or quantum) and on additional resources used during transmission. The main characteristics of a quantum channel are considered: classical capacity, capacity assisted by entanglement between the channel input and output, quantum capacity and secret classical capacity. The unique role of the quantum entanglement property, which manifests itself, in particular, in a nonclassical phenomenon of capacity superadditivity, is emphasised.

中文翻译：

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量子通道容量

简要概述了量子通信信道的信息传输能力理论，这是对经典香农理论的发展。与传统的通信信道不同，量子信道的特征在于整套不同的容量，这取决于传输信息的类型（经典或量子）以及传输过程中使用的其他资源。考虑了量子通道的主要特征：经典容量，通道输入和输出之间纠缠辅助的容量，量子容量和秘密经典容量。强调了量子纠缠特性的独特作用，尤其是在电容性超加和性的非经典现象中表现出来。