China successfully developed 'handheld' quantum satellite communications equipment

Chinese scientists have recently built a terrestrial quantum satellite station that not only possesses the ability to send extremely secure messages anywhere in the world, but also has high mobility with Extremely compact size, only equivalent to a family car.

Specifically, this ultra-mobile quantum satellite communication device was developed by China University of Science and Technology after more than 2 years of research. Excellent component optimization capabilities help the device own a weight of only about 80kg. Equipped with a 28cm (11-inch) diameter telescope, it can easily connect to the Chinese Academy of Sciences' quantum satellite (named Mozi) and acquire encryption keys. keys) in the form of microscopic light particles.

Unlike traditional math-based coding methods, quantum coding draws its momentum from the laws of physics. Theoretically, all information disturbed by encryption algorithms can be cracked by computers if it is fast enough, but quantum lock communication will remain intact because of any intervention. will cause physical changes in the signal and at the same time trigger security alerts for the sender or receiver.

Back to the new invention of Chinese scientists. On January 3, a team of researchers from the Jinan Quantum Institute of Technology tested the device on a high-rise building in Jinan, Shandong Province. This quantum satellite communications station has set up a near-perfect line of light with Mozi satellites for 8 consecutive minutes using a laser beam, while also getting the number of quantum keys needed to code. Large volume of data transmission long distance.

Shi Yipeng, a physics professor and deputy director of the department of aviation and space travel at Peking University, who was not involved in the project but was one of the leading experts in space quantum technology, described the experiment as an important achievement in China's quantum technology development history: 'This device will play an extremely important role in the application of quantum communication technology into practice - an area that previously existed only in the imagination of all of us'.