China to achieve ultra 400 km anti hacker quantum key distribution for the first time in the world-pt100分度表ֶȱ�

China achieve over 400 km of anti hacker quantum key distribution is the world’s first data figure: world first quantum science experimental satellite "Mo-tse" in November 4, Xinhua news agency, Hefei (reporter Xu Haitao) reporter learned from the University of Science & Technology China, the school of Pan Jianwei, Zhang Qiang, Chen Teng Wang Xiangbin of Tsinghua University and the cloud and the Shanghai Institute of Microsystem and other units. Recently, the first in the world to achieve quantum key measuring equipment more than 400 kilometers from the quantum hacking independent distribution. International Journal of physics "authoritative academic Physical Review Letters" recently published the results, praised for its "quantum key distribution for quantum communication and the distance of transmission record". According to reports, quantum key distribution can be separated for two users to provide unconditionally secure shared key. From 1984 the first distribution protocol of quantum key (BB84 protocol) has been proposed, to increase the security of communication distance, improve the safety rate and improve the security reality system, become the three major goal of the development of practical quantum key distribution. In recent years, Chinese Academy of Sciences Pan Jianwei research group around these three goals made a series of international leading achievements. In 2013, for the first time, they realized the measurement of device independent quantum key distribution, and completely solved the hacker attack on the detection system. In the year of 2014, the secure communication distance was extended to 200 km. This year, Pan Jianwei research group for further development and stability by two-photon interference technique and long time stability of the system, by Professor Wang Xiangbin of Tsinghua University in the development of 4 strength optimization theory and method, combined with the Shanghai Institute of Microsystem researcher Li Xing you developed a high efficiency low noise superconducting nanowire single photon detector, successfully measuring device independent quantum key distribution of safe transmission record extended to 404 km and 311 km of ultra low loss fiber optical fiber transmission distance distance, created a new world record, to promote both security and development for long-distance quantum communication. The experiment was critically reviewed by the physics review letters, saying it is an outstanding achievement, breaking the BB84 protocol single photon source transmission ultimate limit".相关的主题文章: