A couple of caveats: (1) The no-hair theorems only holds for electrovac solutions. Solutions with hair are known for other fields besides EM. (2) I assume you're talking about electrically neutral black holes, since a black hole with charge +Q would become a black hole with charge -Q if you formed it out of the corresponding antimatter ingredients.Khashishi said:Is there any difference between a black hole formed from matter and a black hole formed from antimatter? The no-hair theorem says no, right?
I don't follow what you mean by this, but a possibly related idea is this. Black holes have no hair, so when they evaporate, they violate many of the usual conservation laws of particle physics. For example, they have no memory of the lepton number and baryon number that went into them.Khashishi said:If there is no difference, then that means that a black hole can disturb the balance between matter and antimatter, by eating up all the antimatter.
Antimatter is a type of matter that has properties opposite to those of normal matter, such as having a positive charge instead of a negative charge. Black holes are thought to contain both matter and antimatter due to their intense gravitational pull, which can cause particles to collide and create antimatter.
Antimatter black holes provide a potential explanation for why there is more matter than antimatter in the universe. As matter and antimatter annihilate each other upon contact, the presence of antimatter black holes could have resulted in a matter-dominated universe by absorbing and trapping antimatter particles, leaving behind the remaining matter particles to form the structures we see today.
Antimatter black holes are not significantly different from regular black holes in terms of their properties and effects on surrounding matter. The main difference is the presence of antimatter particles within the black hole, which can have different effects on the matter surrounding it.
Currently, there is no direct evidence or observation of antimatter black holes. Scientists can detect their presence through indirect methods, such as studying the effects of their gravitational pull on surrounding matter or looking for signatures of annihilation events between matter and antimatter particles in high-energy environments.
There is no evidence to suggest that antimatter black holes pose any danger to Earth or other planets. In fact, due to their small size and immense distance from our solar system, it is highly unlikely that we would encounter one in our lifetime. Additionally, the effects of their gravitational pull would be similar to regular black holes, which are not a threat to distant objects like planets.