HSBC's blockchain attempt in lex column

Quantum technology is quantum information

quantum information is a new subject developed by the combination of quantum physics and information technology, which mainly includes quantum communication and quantum computing. Quantum communication mainly studies quantum cryptography, quantum teleportation, remote quantum communication technology and so on; Quantum computing mainly studies quantum computer and quantum algorithm suitable for quantum computer

generally speaking, two strangers who are far away from each other want to do the same thing, as if they are led by an invisible rope. This magical phenomenon can be called "telepathy"

similarly, the so-called quantum entanglement means that in the micro world, there is an entanglement relationship between two micro particles with a common source. No matter how far away they are, as long as the state of one particle changes, the state of the other particle can immediately change accordingly. Quantum communication is a new way of information transmission using quantum entanglement effect. If this kind of communication technology can be realized, its influence will be epoch-making

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in terms of time and space, quantum communication belongs to superluminal communication, which is not only the "fastest communication", but also has the possibility of crossing the atmosphere, thus laying a reliable foundation for the global communication network based on satellite quantum relay. A few days ago, German physicists are using quantum entanglement effect to build quantum Internet. Their researchers said: "we have realized the first prototype of quantum network, which completes the reversible exchange of quantum information between nodes

in addition, it can also generate long-distance entanglement between two nodes and keep about 100 microseconds... In the future, people can not only communicate quantum information in a long distance through it, but also make it possible to realize large-scale quantum Internet. "