What does "time machine" mean? Are you talking about history? I often see it on the internet.

Time machine is a virtual machine, which can be used to go back to the past or the future, and generally appears in novels and film and television works.

It first appeared in the famous British novelist Wells' book Time Machine, in which the time machine can travel in time. On the surface, this seems to be nonsense, but since the theory of relativity was put forward, the time machine has a theoretical basis.

In an interview with reporters, Charles said that mathematically, of course you can say that something is going backwards along the time axis. But in fact, neither you nor I can go back in time.

Extended data:

In many science fiction novels, a person or an event disappears from one place and suddenly appears in a far place. In real life, is there really such a "tunnel" for us to transfer instantly? The answer given by scientists who study quantum teleportation technology is: "In the near future, we can theoretically realize human teleportation!"

The magical "entanglement" phenomenon in particles was once called "ghostly interaction between distant places" by Einstein. 1997, Pan Jianwei and others completed the teleportation of a single photon quantum state for the first time, which is a milestone in the development of quantum information.

Since then, various experiments of teleportation of quantum States have been realized, but all of them can only teleport the quantum state of a single particle. Thanks to the success of quantum teleportation experiment of composite system.

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