连续变量量子密钥分发技术研究进展

量子密钥分发作为新一代通信技术,能够实现理论上无条件安全的通信过程。基于连续变量的量子密钥分发具有理论安全码率更高、探测成本低、更易与现有光通信兼容等优势而受到广泛关注。该文对连续变量量子密钥分发的基本原理进行介绍,对高斯调制相干态协议和最新实验进展进行概括总结,并对连续变量量子密钥分发的未来发展进行展望。

Quantum key distribution,as a new generation of communication technology,can achieve theoretically unconditional secure communication processes.Quantum key distribution based on continuous variables has attracted widespread attention due to its advantages of higher theoretical security bit rate,lower detection cost,and easier compatibility with existing optical communications.This article introduces the basic principles of continuous variable quantum key distribution,summarizes the Gaussian modulated coherent state protocol and the latest experimental progress,and looks forward to the future development of continuous variable quantum key distribution.