量子安全直接通信
quantum secure direct communication

Chinese scientists have realized the world's longest quantum secure direct communication (QSDC), measuring 100 km, according to the Beijing Academy of Quantum Information Sciences.
据北京量子信息科学研究院消息，我国科学家成功实现100公里的量子直接通信。这是至今为止世界上最长的量子直接通信距离。