Optimized Qubit-Based Synchronization in Quantum Key Distribution

IF 3.7 3区 计算机科学 Q2 TELECOMMUNICATIONS
Hao-Bing Sun;Jian Li;Xing-Wang Chu;Jing-Yang Liu;Hua-Jian Ding;Qin Wang
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引用次数: 0

Abstract

Quantum key distribution (QKD) enables the generation of information-theoretic secure keys between two remote parties. A critical component of successful QKD implementation is the effective synchronization of clocks between these users. Traditional methods of locking to a reference clock or transmitting a synchronization signal rely on auxiliary equipment, which increases the complexity and cost, thus hindering the widespread deployment of QKD. Here, we propose a method to achieve clock and pulse synchronization by exploiting a subset of the transmitted qubits. We demonstrate our scheme with a time-bin phase-coding BB84 QKD system and verify the realization of long-term stable key generation over distances of 50 km and 100 km. Our method simplifies the implementation of QKD systems and introduces new possibilities for synchronization algorithms in other quantum communication protocols.
量子密钥分发中基于量子比特的优化同步
量子密钥分发(QKD)能够在两个远程方之间生成信息论的安全密钥。成功实现QKD的一个关键组件是这些用户之间时钟的有效同步。传统的锁定参考时钟或传输同步信号的方法依赖于辅助设备,这增加了复杂性和成本,从而阻碍了QKD的广泛部署。在这里,我们提出了一种利用传输量子比特的一个子集来实现时钟和脉冲同步的方法。我们用一个时间bin相位编码BB84 QKD系统验证了我们的方案,并验证了在50公里和100公里距离上长期稳定生成密钥的实现。我们的方法简化了QKD系统的实现,并为其他量子通信协议的同步算法引入了新的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
IEEE Communications Letters
IEEE Communications Letters 工程技术-电信学
CiteScore
8.10
自引率
7.30%
发文量
590
审稿时长
2.8 months
期刊介绍: The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.
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