The multiverse is a theoretically infinite or limited set of possible universes, including everything that exists and may exist: all space, time, matter, energy and the physical laws that describe them and physical constants. The universes contained in the multiverse are called parallel universes.

The first type of parallel universe is very similar to our universe. The physical constants are almost the same, but their internal particle structures are arranged differently, resulting in the parallel universe being another space independent of our universe.

The second type of parallel universe has almost the same basic physical laws as our universe. It can be said that they are exactly the same, with the same universal gravitation and the same gravity, but the physical constants between them are very different. , which in turn causes the two to be isolated.

The third type of parallel universe is obtained based on quantum theory. Everything has a development process, and different choices will lead to different results. And every choice is destined to be in a big trap, that is, no matter how it changes, the universe will have the first parallel universe or the second parallel universe, then this is what people call parallel universe.

Extended information

The concept of parallel universes was not proposed because of the time travel paradox. It comes from quantum mechanics, because quantum mechanics has an uncertainty, that is, quantum Uncertainty. The concept of parallel universes was proposed thanks to the scientific discovery of modern quantum mechanics.

In the 1950s, some physicists discovered that the quantum states observed were different every time they observed quantum particles. Since all matter in the universe is composed of quanta, these scientists speculate that since each quantum has a different state, the universe may not be just one, but may be composed of multiple similar universes. ?

Baidu Encyclopedia-Parallel Universe