Kajetan Maciuszko - blog

White holes are theoretical opposites of black holes – they are places in space which cannot be physically entered by any object or matter in the universe, though energy, matter, light, and information can all escape it. They are a part of many theories, one of which is the theory of eternal black holes. The theory states that in a place where a white hole was in the past, there is a black hole in the future, though this is not true for black holes which have formed through gravitational collapse. Another theory states that white holes may be so-called “exits” of black holes, since any free-falling particle should be able to be falling infinitely, and this theory becomes untrue if the theoretical particle entered the singularity in a black hole, being infinitely compressed and unable to continue its movement. It is also theorized that each time a white hole eventually transforms into a black hole, a “Big Bang” occurs at the singularity, and a new, expanding universe is formed. Some sci...

The false vacuum theory originates from quantum field theory, in which a false vacuum is a vacuum that is in a stable state but isn’t permanently stable: it is metastable. This false vacuum could at any moment decay to a permanently stable vacuum. The false vacuum theory states that our universe is currently in the false vacuum, which may at any time revert to a stable state. This would cause the true vacuum to form and expand rapidly at a speed of light, which would prompt colossal changes to our universe: the laws of physics would be rewritten anew and the basic structure of matter would change completely. In 1980 another theory was proposed, stating that in a case of a true vacuum rapidly forming, our universe would simply revert to its state before the Big Bang, and simply be deleted, as if it never existed. Links: https://cosmosmagazine.com/science/physics/vacuum-decay-the-ultimate-catastrophe/