Quantum stuff and the Big Bang

[Confused Ape]

Hey, if you didn't want to talk about it and add your own two cents, then why did you reply? If I wanted to take ten years to research this topic I certainly wouldn't have brought it up here.

So you're hoping there are forum members who have spent ten years researching this topic so you don't have to do anything yourself???

What I've gathered from various articles is that nobody knows. Stephen Hawking says -

At this time, the Big Bang, all the matter in the universe, would have been on top of itself. The density would have been infinite. It would have been what is called, a singularity. At a singularity, all the laws of physics would have broken down. This means that the state of the universe, after the Big Bang, will not depend on anything that may have happened before, because the deterministic laws that govern the universe will break down in the Big Bang. The universe will evolve from the Big Bang, completely independently of what it was like before. Even the amount of matter in the universe, can be different to what it was before the Big Bang, as the Law of Conservation of Matter, will break down at the Big Bang.

Then there's the idea that our universe may exist inside a black hole.

Every Black Hole Contains A New Universe

In turn, the torsion mechanism suggests an astonishing scenario: every black hole would produce a new, baby universe inside. If that is true, then the first matter in our universe came from somewhere else. So our own universe could be the interior of a black hole existing in another universe. Just as we cannot see what is going on inside black holes in the cosmos, any observers in the parent universe could not see what is going on in ours.

PS:Alternatives to the Singularity

Various new models of what preceded and caused the Big Bang have been proposed as a result of the problems created by quantum mechanics. One model, using loop quantum gravity, aims to explain the beginnings of the Universe through a series of Big Bounces, in which quantum fluctuations cause the Universe to expand. This formulation also predicts a cyclic model of universes, with a new universe being created after an old one is destroyed, each with different physical constants.[2] Another formulation, based on M-theory and observations of the cosmic microwave background, states that the Universe is but one of many in a multiverse, and has budded off from another universe as a result of quantum fluctuations, as opposed to our Universe being all that exists.[4]