论文标题
连续变量量子密钥分布及其应用中的标记想法
Tagging idea in continuous variable quantum key distribution and its application
论文作者
论文摘要
尽管连续变量（CV）量子键分布（QKD）的理论和实验进展巨大，但对于具有多个缺陷的实用系统，其安全性并未得到严格确定。标记的想法被广泛用于使用不完美设备的离散变量量子键分布的安全证明。在本文中，我们将标记的想法从离散变量推广到连续变量。 基于没有标记的信号，我们在最保守的情况下证明了不完美的量子密钥分配系统的安全性。通过引入通用缺陷模型，我们可以在不同阶段（例如调制，通道和检测）中评估并进一步合并多个缺陷。最后，有了这个通用模型和标记想法，我们可以证明具有多个缺陷的连续变量键分配系统的安全性。我们的案例研究表明，我们的证明能够在存在调制和检测缺陷的情况下提供安全的钥匙。
Despite tremendous theoretical and experimental progress in continuous variable (CV) quantum key distribution (QKD), its security has not been rigorously established for practical systems with multiple imperfections. The idea of tagging is widely used in security proofs of discrete variable quantum key distribution with imperfect devices. In this paper, we generalize the tagging idea from discrete variable to continuous variable. Based on untagged signals, we prove the security of the imperfect quantum key distribution system in the most conservative case. By introducing a generic imperfection model, we can evaluate and further incorporate multiple imperfections in the different stages such as modulation, channel and detection. Finally, with this generic model and tagging idea, we can prove the security of continuous variable key distribution system with multiple imperfections. Our case study shows our proofs are able to provide secure keys in the presence of both modulation and detection flaws.
