This is one of those ideas that, in a way, already enter the field of madness, when we refer to black holes. However, not so crazy, since the fractal universe is a term that actually exists. Fractals are those geometric shapes that repeat themselves – they exist at various points in nature. They have a finite area surrounded by a perimeter that tends to infinity, and they are mesmerizing.
A fractal universe is a universe that is repeated. And that is not even a crazy term invented by some crazy person. For example, Andrei Linde is one of the big names in the field of cosmic inflation. He realized that several effects can fuel the inflation of the universe. “As a result, the universe becomes a multiverse, an ever-growing fractal that consists of many exponentially large parts. These parts are so big that, for all practical purposes, they look like separate universes. ”Linde told a story 2 years ago news portal Stanford University.
Plotting hypothetical black holes
The mysteries present in a black hole attract physicists for several reasons. Some like to study real black holes to try to demystify them. Others like to attack completely crazy and hypothetical black holes to generate new doubts. Now, in a study not yet peer reviewed, available at arXiv, a group of researchers attacked this exotic field, led by Sean A. Hartnoll, an associate professor at Stanford University.
The hypothetical black hole studied is, in short, an electrically charged black hole. Around it, there is a type of space called ‘Anti-de Sitter space’. This type of space has, in short, a constant negative geometric curvature. But this is not a good description of our universe, due to several evidences collected by science. That is why we say that it is a hypothetical field, not a theoretical one. Something theoretical must necessarily be plausible.
The mathematics of black hole interior
Mathematics suggests, also hypothetically, some exits to black holes. One is that, within the event horizon (the point of no return), there is a kind of wormhole that takes you to another body called a white hole. This white hole is the opposite of a black hole, as it only ejects matter, and it is not possible to enter there. It is worth remembering that this is purely mathematical, and there is no evidence of its existence.
In the case of this hypothetical black hole, there is a “break” in the internal horizon (not in the event horizon). That is, if you managed to get into one of them, you could walk around there without being stretched until it becomes energy. However, the wormhole is also destroyed, and you would be trapped there for eternity.
Inside, you will pass through a region where the space itself vibrates. Not as waves, but as a real vibration. Later on, you will finally come across the fractal universe. It looks like a miniature of our universe, even copying the expansion.
There is a larger scale, but like any fractal, it has infinite repetitions. In other words, a universe that has “copies” on smaller scales within itself. Perhaps it is not exactly a fractal universe in fact, but a kind of illusion, as is the case with the quote by Linde, at the beginning of the text – and that is my ramble, nothing that has been explained in the article.
At the heart of it all, there is singularity. The point that concentrates all the mass of a black hole, which collapses under itself and becomes a point of infinite density. If until now mathematics allows solutions, in the singularity physics is broken, and nothing more can be explained.
What is the use of this type of study?
Studying these subjects may seem crazy, since they are completely hypothetical. However, they have real-world applications. These black holes behave like superconductors. That is, studying superconductors in our world can help us to understand them. In addition, they look like rotating black holes that exist. In other words, studying superconductors could help understand real black holes.
The study has not yet been peer-reviewed and the preprint is available at arXiv. With information from Live Science e Stanford News.