量子密钥分发技术在政务、金融、外交、军事等领域具有广阔的应用前景。其中，连续变量量子密钥分发协议可利用现有光通信器件，无需单光子源和单光子探测器，具有通过提高系统重复频率获得高密钥速率的潜力，是信息安全领域的重要发展方向，也是当前的研究热点。目前，后处理过程纠错吞吐量限制是制约连续变量量子密钥分发的速率提升的关键瓶颈问题之一。针对这个难题，以提升纠错吞吐量为目标，本项目拟深入研究制约纠错吞吐量提升的核心科学原因，重点开展多边类型低密度校验码纠错方案优化研究、新型神经网络非迭代译码纠错方案探索研究和真实信道纠错方案验证研究，为新一代高速连续变量量子密钥分发系统提供关键技术支撑，推进连续变量量子密钥分发技术的实用化进程。

Quantum key distribution technology has a broad application prospect in government affairs, finance, diplomacy, military and other fields. Among them, continuous-variable quantum key distribution protocol can utilize existing optical communication devices without single photon source and single photon detector, and has the potential to obtain high key rate by improving the system repetition frequency. It is an important direction in the field of information security and also a research hotspot. At present, the postprocessing error correction throughput limitation is one of the bottlenecks that restrict the rate improvement of continuous-variables quantum key distribution. In order to enhance error correction throughput, this project intends to study the scientific reason for error correction throughput limitation, focus on optimizing the multi-edge type low density check code error correction scheme, exploring the non-iterative neural network decoding error correction scheme and verifying the error correction scheme in the real channel, provide key technical support for new generation of high speed continuous-variable quantum key distribution system, and promote the practical process of the continuous-variable quantum key distribution technology.