AI 中文总结
研究基于纠缠的量子密钥分发在金融基础设施中的部署，利用偏振纠缠通过22公里光纤链路实现，全自动系统连续四个月生成安全密钥，正常运行时间达93.7%，展示了eQKD在金融基础设施中的实际集成可行性。
AI 中文摘要
我们展示了基于纠缠的量子密钥分发（eQKD）在高安全性金融基础设施中的可行性。通过22公里光纤链路，两个数据中心间损耗8dB，利用偏振纠缠实现。全自动系统连续四个月以平均63.8kb/s速率生成安全密钥，存入密钥管理系统并用于建立VPN隧道。系统总正常运行时间达93.7%，量子光学组件无停机。主动偏振控制使量子误码率97.4%时间低于2%，基于纠缠光子对固有时间相关性的定时同步精度达亚300ps。该独立系统无需偏振导向激光器和外部高精度时间参考，结果表明eQKD可实际集成到运行中的金融基础设施。
英文摘要
We demonstrate the feasibility of entanglement-based quantum key distribution (eQKD) in high-security financial infrastructure over a 22 km fiber link with 8 dB loss between two data centers using polarization entanglement. The fully automated system continuously generated secure keys for four months at an average rate of 63.8 kb/s, which were stored into a key management system and consumed to establish a VPN tunnel. The setup achieved 93.7% total up-time, with no downtime caused by the quantum optical components. Active polarization control kept the quantum bit error rate below 2% for 97.4% of the time and timing synchronization based on the entangled photon pairs' intrinsic temporal correlations achieved sub-300 ps precision. Our standalone system requires neither polarized guide lasers nor external high-precision time references. These results show practical integration of eQKD into operational financial infrastructure.
Comments8 pages, 4 figures
