Imagination of spatial interface 2
Second level: bubbles left after expansion
If the concept of the first layer of multiple universe is not easy to digest, then try to imagine the next structure with the first layer of multiple universes with infinite groups: groups are independent of each other, and even have different space-time dimensions and physical constants. These groups constitute the second layer of multiple universes - modern theories known as "unordered continuous expansion" predict them.
As an inevitable extension of the Big Bang theory, "expansion" is closely related to many other inferences of this theory. For example, why is our universe so large and so regular, smooth and flat? The answer is "space has undergone a rapid stretching process", which can explain not only the above problems, but also many other attributes of the universe. See Expanded Universe by AlanH.GuthandPaulJ.Steinhard;ScientificAmerican,May1984;Self-breeding Expanded Universe byAndreiLinde,November1 994] The "expansion" theory is not only spoken by many theories of elementary particles, but also confirmed by many observations. "Continuity of disorder" refers to behavior on the maximum scale. The space as a whole is being stretched and will last forever. However, some specific areas stop pulling, resulting in independent "bubbles" like bubbles inside the expanded toast. There are countless such bubbles. Each of them is the first layer of multiple universes: infinite in size and full of matter precipitated by the rise and fall of the energy field.
For the earth, another bubble is so far away that even if you move forward at the speed of light, you will never reach it. Because the space between the earth and "another bubble" stretches much faster than you move. If there is another you in another bubble, even your offspring will never want to observe him. For the same reason, that space is accelerating expansion, the observation results are frustrating to point out that even the other self in the first layer of multiple spaces will not be seen.
The difference between the second layer of multiple universes and the first layer is very large. Not only are the initial conditions different, but there are also vast differences in appearance. Today's mainstream view of physics believes that many so-called physical constants such as the dimensions of space-time and the characteristics of elementary particles are not part of the basic physical laws, but only the result of a process called "symmetry destruction". For example, theoretical physicists believe that our universe was once composed of nine equal dimensions. In the early history of the universe, only three of them participated in the space to pull gods, forming the three-dimensional universe we have observed now. The remaining six dimensions are now unobservable, because they are curled on a very small scale, and all substances are distributed on the "surface" of these three fully stretched dimensions (for 9 dimensions, three dimensions are just a surface, or a layer of "membrane").
We live in 3+1-dimensional space-time, and we are not particularly surprised by this. When describing nature
When a partial differential equation is an ellipse or hyperbolic equation, that is, one of the spaces or time is 0-dimensional or
At the same time, it is multi-dimensional, and it is impossible for observers to predict the universe (purple and green parts).
In the rest of the case (the hyperbolic equation), if n>3, the atom cannot exist stably, n