In this brief review, we start by clarifying the crucial differences between three different protocols of quantum channel discrimination. In some recent literature, there has been confusion between the protocols of quantum illumination [1, 2], quantum reading [3], and a scheme of communication within a discrete-variable quantum computer [4]. While all these protocols are based on the model of quantum channel discrimination, they have completely different applications and features, which is the reason why they have different names and should not be naively confused. We also discuss the notion of quantum reading capacity [5] of an ensemble of quantum channels, clarifying how this is easily extended to an adaptive formulation and discussing the mathematical conditions under which it can be connected to the different notion of dense coding capacity [6] of a quantum channel.

在这篇简短的综述中，我们首先阐明了三种不同的量子信道区分协议之间的关键差异。在最近的一些文献中，在量子照明的协议[1，2]，量子读取[3]和离散变量量子计算机内的通信方案[4]之间存在混淆。尽管所有这些协议都基于量子信道识别模型，但是它们具有完全不同的应用和功能，这就是为什么它们具有不同名称并且不应天真地混淆的原因。我们还讨论了量子通道整体的量子读取能力的概念[5]，