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  • Category: Tech

According to China's Science and Technology Daily on Sunday (June 1, 2025), Chinese researchers have made important progress in the field of quantum direct communication and successfully built a fully connected quantum direct communication network with a distance of 300 kilometers between four nodes. The above achievement was made by Professor Chen Xianfeng's team from Shanghai Jiaotong University and Professor Li Yuanhua's team from Shanghai University of Electric Power.

The breakthroughs of this research are mainly reflected in three aspects: first, it breaks through the limitations of traditional star networks and creates a large-scale scalable fully connected architecture; second, by optimizing the light source preparation technology, the transmission distance is increased to 300 kilometers; third, an error correction mechanism based on quantum state reconstruction is established to ensure the stability of multi-node communication.

According to the report, these technological breakthroughs have laid the foundation for the practical application of quantum communication networks. In the future, this technology is expected to be applied to military command, government communications, financial transactions and other fields with extremely high information security requirements, providing more reliable protection for information transmission.