Abstract
In order to avoid the complexity of Gaussian modulation and the problem that the traditional point-to-point communi-cation DM-CVQKD protocol cannot meet the demand for multi-user key sharing at the same time,we propose a multi-ring discrete modulation continuous variable quantum key sharing scheme(MR-DM-CVQSS).In this paper,we primarily com-pare single-ring and multi-ring M-symbol amplitude and phase-shift keying modulations.We analyze their asymptotic key rates against collective attacks and consider the security key rates under finite-size effects.Leveraging the characteris-tics of discrete modulation,we improve the quantum secret sharing scheme.Non-dealer participants only require simple phase shifters to complete quantum secret sharing.We also provide the general design of the MR-DM-CVQSS protocol.We conduct a comprehensive analysis of the improved protocol's performance,confirming that the enhancement through multi-ring M-PSK allows for longer-distance quantum key distribution.Additionally,it reduces the deployment complexity of the system,thereby increasing the practical value.
基金项目
National Natural Science Foundation of China(61971348)
National Natural Science Foundation of China(61201194)
NETL
NSTL
万方数据