模式配对量子密钥分发的现场测试
Field test of mode-pairing quantum key distribution
AI总结：
本研究在城际光纤链路上对mode-pairing量子密钥分发协议进行了现场测试，在无需全局相位锁定下实现了高密钥率，证实其能有效减少可信节点需求，是量子网络的理想协议。
摘要：
量子密钥分发是量子技术的基石，为远程通信方提供信息论安全的密钥。随着全球众多量子通信网络的建立，mode-pairing协议凭借其在城际距离上使用简单装置即可实现的高效性而脱颖而出，成为一种极具前景的解决方案。在本研究中，我们将mode-pairing方案应用于现有的城际光纤链路中，在数十公里至约一百公里的距离上进行了现场测试。在没有全局相位锁定的情况下，我们的系统在$195.85$ km的对称链路中实现了$1.217$ kbit/s的密钥率，在$127.92$ km的非对称链路中实现了$3.089$ kbit/s的密钥率。结果表明，mode-pairing协议能够实现与京沪干线两个可信节点间单条量子链路相当的密钥率，有效减少了对一半可信节点的需求。这些现场测试证实了mode-pairing方案的适应性、高效性和实用性，使其成为量子网络的理想协议。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
