Parallel universe, in fact, there are too many nouns related to it. Multi-universes and parallel universes have similar meanings, so this paper will talk about what parallel universes are first, and then talk about others.
There are several kinds of parallel universes. Some people say, what, are there various parallel universes? Yes, there are different parallel universes under different physical theories. Based on the Big Bang cosmology, there are two different parallel universes.
The first kind of parallel universe means that our universe is expanding, so what is outside our universe? If there is nothing outside, obviously this statement is unconvincing, which leads to a hypothesis that there are other equal universes besides the universe, and they are also expanding. There are countless such equal universes. In this case, there are probably countless earths, countless you and me in countless universes.
The second kind of parallel universe means that our universe is in an ever-expanding expansion field, which will never end and is much faster than the speed of light. Sudden inflation stopped in an area of the inflation field, and a big explosion occurred in this area, causing? Bubble universe? Our universe is the bubble universe in this eternal inflation field, and there are countless such universes.
The first one is very similar to the second one, and the third one is the bright spot, which is the parallel universe under the framework of quantum mechanics.
There is a very important experiment in quantum mechanics, that is, the electron double-slit interference experiment. An electron can pass through two slits at the same time, forming interference fringes on the back screen. This is not difficult to explain, because of the duality of waves and particles, electrons are both particles and waves, and the electrons emitted one by one are actually like water waves. Of course, interference fringes can be formed by the two slits at the back.
The strange thing about this experiment is that once it is observed, electrons only pass through a single gap and no longer interfere with themselves to form interference fringes. Are electrons conscious? The Copenhagen school explains that microscopic particles conform to the Schrodinger equation when they are not observed, and once observed, they will collapse and show the characteristics of particles. Einstein disagreed with this explanation, so there was a long-lasting argument. Later, Schrodinger put forward a famous thought experiment, which is known to all.
This argument in quantum mechanics has become harmonious under this explanation, although it has not been accepted by the mainstream. This is a multi-world interpretation. The main idea of this hypothesis is that whether you observe electrons or open a box to observe cats, as long as you observe them, you will actually split into two parallel universes that do not interfere with each other. In one universe, electrons pass through gap A, in another universe, electrons pass through gap B, and so do cats.
According to this principle, countless universes have been split up. They may have the same history, but the development trend in the next second is different. As I described at the beginning, you in one world decided to finish reading this article, and you in the other world didn't finish reading this article.
Parallel world Many people understand the parallel world as shown in the following figure, which is also a common expression in movies. Where does this parallel world exist? Some people say it's a world of another dimension. In fact, after a preliminary understanding of string theory, we know that the so-called dimension is not what we imagined, and the parallel world in the film is only caused by the film expression.
The parallel universe theory is not rigorous, generally speaking, it is a parallel universe, and there are parallel universe hypotheses such as membrane universe under the framework of string theory.
It is only a few decades since mankind stepped into space, and the rapid understanding of the universe is also a matter of recent decades. It is naive to think that mankind already knows the universe very well. For the universe, we are still the cradle of civilization. We don't know how many unknowns there are in the universe. We don't know what our universe looks like from a bigger perspective. Is the universe infinite? None of this is known.
My guess is that there is a higher world besides this, and the number of universes is infinite. I also believe that there will be a planet almost the same as the earth in other universes. I also believe that there is another me in another universe, another earth, but the development trend is different. There, maybe I am a rich man, a politician and a president. ......