模式配对量子密钥分发的现场测试

IF 8.4 1区 物理与天体物理 Q1 OPTICS Optica Pub Date : 2024-05-30 DOI:10.1364/optica.520697
Hao-Tao Zhu, Yizhi Huang, Wen-Xin Pan, Chao-Wu Zhou, Jianjun Tang, Hong He, Ming Cheng, Xiandu Jin, Mi Zou, Shibiao Tang, Xiongfeng Ma, Teng-Yun Chen, Jian-Wei Pan
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引用次数: 0

摘要

量子密钥分配是量子技术的基石,可为远程各方提供信息理论上的安全密钥。随着许多量子通信网络在全球范围内的建立,模式配对协议因其在城际距离内使用简单设置的功效而脱颖而出,成为一种前景广阔的解决方案。在这项研究中,我们在现有的城际光纤链路中采用了模式配对方案,并在几十公里到一百公里的距离范围内进行了实地测试。我们的系统在 195.85 千米的对称链路中实现了 1.217 kbit/s 的关键速率,在 127.92 千米的非对称链路中实现了 3.089 kbit/s 的关键速率,且无需全局相位锁定。测试结果表明,模式配对协议的密钥传输速率可与京沪骨干线路上两个可信节点之间的单量子链路的密钥传输速率相媲美,有效减少了对一半可信节点的需求。这些实地测试证实了模式配对方案的适应性、高效性和实用性,使其成为非常适合量子网络的协议。
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Field test of mode-pairing quantum key distribution
Quantum key distribution is a cornerstone of quantum technology, offering information-theoretical secure keys for remote parties. With many quantum communication networks established globally, the mode-pairing protocol stands out for its efficacy over inter-city distances using simple setups, emerging as a promising solution. In this study, we employ the mode-pairing scheme into existing inter-city fiber links, conducting field tests across distances ranging from tens to about a hundred kilometers. Our system achieves a key rate of 1.217 kbit/s in a 195.85 km symmetric link and 3.089 kbit/s in a 127.92 km asymmetric link without global phase locking. The results demonstrate that the mode-pairing protocol can achieve key rates comparable to those of a single quantum link between two trusted nodes on the Beijing-Shanghai backbone line, effectively reducing the need for half of the trusted nodes. These field tests confirm the mode-pairing scheme’s adaptability, efficiency, and practicality, positioning it as a highly suitable protocol for quantum networks.
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来源期刊
Optica
Optica OPTICS-
CiteScore
19.70
自引率
2.90%
发文量
191
审稿时长
2 months
期刊介绍: Optica is an open access, online-only journal published monthly by Optica Publishing Group. It is dedicated to the rapid dissemination of high-impact peer-reviewed research in the field of optics and photonics. The journal provides a forum for theoretical or experimental, fundamental or applied research to be swiftly accessed by the international community. Optica is abstracted and indexed in Chemical Abstracts Service, Current Contents/Physical, Chemical & Earth Sciences, and Science Citation Index Expanded.
期刊最新文献
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