论文标题
诱饵量子键分布的完全被动发射器
A fully passive transmitter for decoy-state quantum key distribution
论文作者
论文摘要
被动量子键分布（QKD）发射器会随机生成由QKD协议规定的量子状态，结合了固定的量子机制和选择后步骤。通过避免使用由随机数发生器外部驱动的主动光调节器的使用，被动QKD发射器可提供对调制器侧通道的免疫力，并有可能实现更高的操作频率。最近，已经提出了适合被动诱饵状态QKD的第一个线性光学设置。在这项工作中，我们简化了原型，并采用了急剧不同的方法来编码和诱饵状态。最重要的是，我们详细阐述了一个严格的定制安全分析，超过了不必要的假设，并且是对以前提案至关重要的选择后步骤。
A passive quantum key distribution (QKD) transmitter generates the quantum states prescribed by a QKD protocol at random, combining a fixed quantum mechanism and a post-selection step. By avoiding the use of active optical modulators externally driven by random number generators, passive QKD transmitters offer immunity to modulator side channels and potentially enable higher frequencies of operation. Recently, the first linear optics setup suitable for passive decoy-state QKD has been proposed. In this work, we simplify the prototype and adopt sharply different approaches for BB84 polarization encoding and decoy-state generation. On top of it, we elaborate a tight custom-made security analysis surpassing an unnecessary assumption and a post-selection step that are central to the former proposal.
