论文标题
具有一个诱饵状态的量子数字签名的280公里实验演示
280-km experimental demonstration of quantum digital signature with one decoy state
论文作者
论文摘要
量子数字签名（QD）保证了具有信息理论安全性的签名消息的不可遗忘性，不可纠正性和可传递性，因此最近引起了很多关注。但是，QD的大多数实现都显示出相对较低的签名速率或/和/和短传输距离。在本文中，我们报告了仅使用一个诱饵状态的原理证明进行QD示范。首先，这种方法避免了真空状态的调节，从而降低了实验复杂性和随机数量的消耗。此外，与低损坏的不对称的马赫德尔干涉仪和实时极化校准技术结合在一起，我们成功地达到了更高的签名速率，例如，103 km时的0.98位/s，迄今为止，在280 km安装的纤维上，有创纪录的变速箱距离。我们的工作是朝着QD的现实应用迈出的重要一步。
Quantum digital signature (QDS) guarantee the unforgeability, nonrepudiation and transferability of signature messages with information-theoretical security, and hence has attracted much attention recently. However, most previous implementations of QDS showed relatively low signature rates or/and short transmission distance. In this paper, we report a proof-of-principle phase-encoding QDS demonstration using only one decoy state. Firstly, such method avoids the modulation of vacuum state, thus reducing experimental complexity and random number consumption. Moreover, incorporating with low-loss asymmetric Mach-Zehnder interferometers and real-time polarization calibration technique, we have successfully achieved higher signature rate, e.g., 0.98 bit/s at 103 km, and to date a record-breaking transmission distance over 280-km installed fibers. Our work represents a significant step towards real-world applications of QDS.
