对离散调制的连续变量测量设备独立量子密钥分布与不平衡调制的性能改进
Zehui Liu1, Jiandong Bai1, Fengchao Li1
1School of Semiconductor and Physics, North University of China, Taiyuan 030051, China.
Entropy (Basel, Switzerland)
|February 26, 2025
概括
在连续变量测量设备独立量子密钥分布 (CV-MDI-QKD) 中不平衡的调制提高了秘密密钥速率和传输距离. 这种简化方法可以提高实际的安全性,而无需更改设备.
科学领域:
- 量子信息科学 量子信息科学
- 量子密码学 量子密码学
- 量子通信网络 量子通信网络
背景情况:
- 调制方案对于连续变量测量设备独立量子密钥分布 (CV-MDI-QKD) 是至关重要的.
- 发射器之间的调制差异,特别是离散格式 (例如四态,八态),降低了CV-MDI-QKD的性能和安全性.
- 调查不平衡的调制效应对于实际的CV-MDI-QKD部署至关重要.
研究的目的:
- 分析不平衡的发射器调制对CV-MDI-QKD安全性的影响.
- 在对称和非对称距离配置下探索协议性能.
- 为增强CV-MDI-QKD制定一个实用且具有成本效益的调制策略.
主要方法:
- 使用了CV-MDI-QKD的不平衡离散调制图.
- 采用数值凸优化技术进行分析和改进.
- 在各种距离场景下模拟协议性能.
主要成果:
- 建议使用不平衡调制的CV-MDI-QKD协议显示了显著更高的秘密密钥率.
- 与原始协议相比,秘密密钥速率大约增加了77.77%,最大传输距离增加了24.3%.
- 在对称和不对称的距离设置中证明了增强的安全性和扩展的范围.
结论:
- 不平衡离散调制提供了一种实用和简化的方法来提高CV-MDI-QKD的性能.
- 该方法提高了秘密密钥速率和传输距离,而不需要对现有的实验设置进行修改.
- 这种方法在现实世界的应用中促进了具有成本效益和安全性的量子通信网络.
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