The realization of quantum secure direct communication over 100 km fiber with time-bin and phase quantum states by Chinese scientists is the world’s longest distance for quantum direct communication.
The research result, 82 km longer than the previously published longest quantum direct communication distance, was published on the latest version of Light-Science & Applications with great practical application significance.
Quantum direct communication can not only sense eavesdropping but also prevent it so it is essential for the confidentiality of messages in modern communication.
The progress in study of quantum secure direct communication is important to improve the performances, such as the secure information rate and the communication distance, the research paper said. In previous published research result the longest distance of quantum direct communication was 18 km, according to Xinhua.
China has been advancing the industrial application of quantum technology. It has achieved a series of breakthroughs in quantum technology in recent years, including the world’s first quantum satellite, a 2,000-km quantum communication line between Beijing and Shanghai, and the world’s first optical quantum computing machine prototype.
According to chinadaily; cgtn