"Point like" China quantum satellite2016-08-16 13:19:07 182 ℃
Xinhua news agency, Beijing, August 16, China 16 successful launch of world's first single quantum science experiment satellite, the international scientific community in succession to this "praise", explains the meaning of quantum satellite from their point of view, as well as the impact on people's lives.
Have praised the first"
As gold medals in the Olympic Games are always concerned, the first attribute of China's quantum satellite is also the focus of international scientists stressed. Alexander ·, a quantum physicist at the Boston University, said: "this is a very exciting thing, because it is the first time to carry out such tests, so it is of great significance to the world," Sher Gio Janko said."
Quantum communication competition since 1995 European researchers at the bottom of Lake Geneva for quantum key distribution initial demonstration began, he said. After that, Britain, America, Japan and China are in exploring the quantum communication network between cities, and now the race from the ground into space, and because the satellite to connect apart far different city. China is ahead of the launch of quantum satellite.
Adrian ·, a professor of quantum physics at the University of Cambridge, said: "I'm excited about the Chinese launch of the quantum satellite." He believes that this is the first step in building a global secure communications network for the use of quantum technology".
German integrated quantum science and technology center is responsible for Tommaso & middot; calarco said: "China launched the world's first single quantum satellite is of great significance and taken a decisive step in the implementation of the global quantum secure communication on the road."
Interpretation of satellite significance
Scientists have also interpreted the significance of quantum satellites from different angles. Wang Chen, a quantum expert at the University of Massachusetts in the United States, said the use of satellites to participate in quantum communication is mainly to reduce the loss of carrying signals in the long distance transmission of photons. Because the transmission loss in space is smaller than that of the optical fiber and the ground air.
Sher Gio Janko gives a more detailed explanation. He said that the main limitation of quantum communication on the ground is the distance, because even the best optical fiber also has the inherent loss, the current quantum communication is usually only 50 to 100 km of the operating distance. Although there are a number of quantum communication experiments to achieve a distance of 250 to 300 km, but not much practical use, because this is the availability of very low key distribution rate as the cost of exchange. By using a satellite, the earth's surface can be connected to a node at a distance of two points on the earth's surface.
Some scientists said China Satellite quantum effects not only quantum communication and quantum computation, such as Adrian & middot; Kent said, China's quantum satellite "for the future eventually formed a distributed quantum computing network is very important.
Kent also referred to the Chinese satellite for international scientific cooperation of significance, because the satellite project and the Austrian scientists are partners. Kent said: "science without borders, China and Austria in collaboration with scientists of the quantum satellite project is exciting evidence."
Austria famous quantum scientist Anton & middot; zeilinger participated in the China Satellite quantum project, he believes that Chinese satellite will drive the development of related fields across the world, because if the success of the Chinese team, then the other team will more easily obtained funding for satellite quantum.
How to affect life
How will the quantum satellite affect our life? Calarco said: "based on the quantum technology now has entered our daily life, there is no quantum mechanics, we wouldn't have transistors and lasers, also won't have a computer and the Internet." He said that the quantum satellite may promote the further development of related areas, so that the existing technology more accurate, sensitive, safe and better performance.
Wang stressed the quantum communication can from the physics principle to ensure transmission of information will not be eavesdropping characteristics, except for national security purposes, for ordinary people, is very meaningful in terms of the protection of commercial secrets and personal privacy.
Adrian & middot. Kent also think quantum communication to give all of us a greater privacy protection, and with the help of satellite to build a global quantum computing network, also can make the whole society are faster, better to critical incident response. (reporter Huang Kun, Lin Xiaochun, Zhang Jiawei, Guo Yang)
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