Quantum communication is a revolutionary field of information technology, which is quite strange to the general public all over the world. Quantum is the smallest and inseparable basic individual in the physical world. Among the wonderful characteristics of quantum, one that is most easily understood by the public and is also crucial to communication is "quantum entanglement".
Two entangled quanta are often compared to telepathic twins in legend. When the elder brother's state changes, the younger brother's state will also change. If two photons are intertwined, even if they are thousands of kilometers apart or even more, there will still be strange interactions between distant points.
Using quantum control technology to communicate means to encode, store, transmit and manipulate information in a revolutionary way, so as to fundamentally put an end to stealing secrets and ensure information security. After the large-scale popularization and application of quantum communication, there will be a "quantum Internet", and now there is almost no privacy on the Internet.
"China Team" launched the first quantum satellite, and the large-scale optical fiber quantum communication backbone network project of "Beijing-Shanghai trunk line" will be put into use this year. Chinese people have successfully "surpassed" in the field of quantum communication, leading the United States and Europe in one fell swoop.
After entering the information age, information technology plays a key role in various technologies. Among the world's business giants, various information technology companies account for an increasing proportion. Moreover, the speed of self-transformation, evolution and elimination of high-tech companies in the information field is far from that of traditional commercial companies. Whether information technology is advanced or backward is of great significance to a country's overall competitiveness.
Scientific development is not only systematic, but also has certain key breakthrough space. It is a fact that China's information technology still lags behind the United States as a whole. But it is also true that quantum communication is ahead of the United States. These two facts describe the fact that China is catching up with the United States in information technology.
In the whole field of science and technology, China is also an active and tenacious pursuer. For example, in the aerospace field, the United States is far ahead. The carrying capacity of Saturn V rocket used for Apollo landing on the moon is 1 18 tons, while China's relatively advanced Long March V carrier rocket is 25 tons. In addition, in deep space exploration, the United States landed on the moon nearly half a century ago, and the detector reached all the planets in the solar system. 1 Voyager launched in 9771has flown out of the solar system, and China has not started to do all this.
However, the gap between China's space flight and the United States is not as depressing as the above facts show. In terms of practical space technology, many catching-up actions of China have achieved practical results. In addition, China's supercomputers are constantly breaking through, and our material technology, such as carbon nano-material technology, is also making progress. China's scientific and technological catch-up has established a sense of direction, formed some reliable road maps, and constantly promoted "surface" with "point" breakthrough, and our catch-up has become more orderly and solid.
Judging from the international business competition, the distribution pattern of scientific and technological strength is generally not "winner takes all", and other factors such as the market also have the ability to incite. As long as it is well organized, it is possible for late-developing countries to break through one or two fields, span more fields and reverse the competitive situation.
Of course, the national boundaries of science and technology will gradually become less absolute, and all scientific and technological achievements will eventually merge into the same civilization of mankind. China must accelerate to become a major contributor to the development of human science and technology. At present, China's total R&D expenditure, annual patent applications, papers published, citation rate and other basic data are rising rapidly, just like the footsteps of China.
A quantum satellite can't change the overall situation of China, but it is an important quantity accumulation when China gradually approaches a qualitative boundary. If this continues, there is great hope for China.