Project supported by the National Natural Science Foundation of China(Grant Nos.62071381 and 62301430);Shaanxi Fundamental Science Research Project for Mathematics and Physics(Grant No.23JSY014);Scientific Research Plan Project of Shaanxi Education Department Natural Science Special Project(Grant No.23JK0680);Young Talent Fund of Xi’an Association for Science and Technology(Grant No.959202313011)。
Continuous-variable quantum secure direct communication(CVQSDC)with Gaussian modulation(GM)demands a considerable quantity of random numbers during the preparation process and encodes them separately on the quadrature...