基于零光子催化的八态离散调制测量设备无关连续变量量子密钥分发
Zero-photon catalysis based eight-state discrete modulated measurement-device-independent continuous-variable quantum key distribution
AI总结：
本文提出一种基于零光子催化（ZPC）的八态离散调制测量设备无关连续变量量子密钥分发协议，结合离散调制与逆向协商，在低信噪比下显著提升了密钥率、传输距离等性能。
摘要：
零光子催化（ZPC）引入了无噪声衰减，并且可以通过量子密钥分发（QKD）协议中的现有技术来实现。在本文中，我们提出了一种基于ZPC的八态测量设备无关连续变量QKD（MDI-CV-QKD），结合了离散调制和逆向协商。在低信噪比（SNR）下，与无ZPC的八态协议、无ZPC的四态协议以及有ZPC的四态协议相比，这种涉及ZPC的八态协议在最优调制方差、密钥率、传输距离、可容忍过量噪声和协商效率方面表现出更高的效率。
英文摘要：
Zero-photon catalysis (ZPC) introduces noiseless attenuation and can be implemented by existing technologies in quantum key distribution (QKD) protocols. In this paper, we present a ZPC-based eight-state measurement-device-independent continuous-variable QKD (MDI-CV-QKD) combined with discrete modulation and reverse reconciliation. This ZPC-involved eight-state protocol shows better efficiency in terms of optimal modulation variances, secret key rates, transmission distances, tolerable excess noises, and reconciliation efficiency compared to the eight-state protocol without ZPC, the four-state protocol without ZPC, and the four-state protocol with ZPC, at a low signal-to-noise ratio (SNR).
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