论文标题
量子密钥分布，任何两个独立且相同分布的状态
Quantum key distribution with any two independent and identically distributed states
论文作者
论文摘要
为了证明量子密钥分布（QKD）协议的安全性，必须对用户设备强加一些假设。从实验的角度来看，最好的理论要求是可行的，而且数量很少。在本文中，我们提供了QKD协议的安全证明，只要它发出两个独立且相同分布（I.I.D.）状态，允许使用任何光源。我们的QKD协议由两个部分组成：第一部分是基于该方法的光子数字统计数据的表征，最高三光子的光子数统计数据[opt。经验。 27，5297（2019）]，然后运行我们的差速转移（DPS）协议[NPJ Quantum Inf。 5，87（2019）]。值得注意的是，只要光源发出两个I.I.D.表明，即使我们对光源没有事先了解，我们也可以在QKD协议中安全地使用它。由于此结果大大简化了对光源的要求，因此它构成了实现真正安全的量子通信的重要贡献。
To prove the security of quantum key distribution (QKD) protocols, several assumptions have to be imposed on users' devices. From an experimental point of view, it is preferable that such theoretical requirements are feasible and the number of them is small. In this paper, we provide a security proof of a QKD protocol where the usage of any light source is allowed as long as it emits two independent and identically distributed (i.i.d.) states. Our QKD protocol is composed of two parts: the first part is characterization of the photon-number statistics of the emitted signals up to three-photons based on the method [Opt. Exp. 27, 5297 (2019)], followed by running our differential-phase-shift (DPS) protocol [npj Quantum Inf. 5, 87 (2019)]. It is remarkable that as long as the light source emits two i.i.d. states, even if we have no prior knowledge of the light source, we can securely employ it in the QKD protocol. As this result substantially simplifies the requirements on light sources, it constitutes a significant contribution on realizing truly secure quantum communication.
