The original quantum safety direct communication by Chinese scientists has taken another big step forward in the practical process. On the 14th, this reporter learned from the joint experimental group of Tsinghua University and Nanjing University of Posts and Telecommunications that following the announcement of the theoretical scheme of quantum safe direct communication by quantum storage in laboratories announced in June this year, they have for the first time realized the direct security of quantum information in a 500-meter optical fiber Send. Quantum communications include quantum key distribution, quantum secret sharing and quantum secure direct communication and other different modes. The former two only use the principle of quantum mechanics to encrypt the information, but the encrypted information is still transmitted and decrypted through the ordinary communication channel, so only one information can be encrypted at a time. The direct communication of quantum security is conducted by Prof. Long Guilu of Tsinghua University The theoretical system pioneered independently in the world can use the principle of quantum mechanics to directly and safely transmit original information. They use a quantum phenomenon called entanglement to achieve quantum-safe direct communication. When entanglement occurs, there is a connection between the two particles, no matter how far apart they are. Measuring a particle will immediately affect the state of the other particle. Quantum-safe direct communication uses many pairs of such entangled particles to determine whether it is safe based on the transmission state of one of the particles, and to use another particle to directly and securely communicate when it is safe. Zhang Feng and his collaborators Zhu Feng, Sheng Yubo and Huang Yidong from Tsinghua University experimented in a ring of two kilometers of circular optical fiber for the first time achieving quantum-safe direct communication within a range of 500 meters. The theoretical analysis proves that based on the current test conditions, Can achieve tens of kilometers of quantum safe direct communication. Sheng Yu-Bo told reporters that the experimental results clearly show that fiber-based quantum secure direct communication can achieve close to the current commercial quantum key distribution transfer rate. Quantum Secure Direct Communications To achieve full commercialization, there are many improvements, but this experiment is a crucial step toward practical use of quantum secure direct communications. we have over 10 years experience in making various size Strut Channel product. Strut Channel Strut Channel,Unistrut Channel,Unistrut C Channel,Z Shape Steel Channel Unovo Machinery Co., Ltd. , https://www.rollformingprofile.com