I’m wondering about the “infinite density” part of big bang theory and whether “infinite density” is a literal singularity of everything or just a super duper high and immeasurable density or maybe something else?
In: Physics
We don’t know.
The theories and math falls apart. So we have a very good idea what the universe was like the moment after, but we don’t really know the moment of.
Best guesses are it was infinitely dense and infinitely everywhere, because it appears the universe is infinite, and would have to be then as well.
There are hypothetical models of inflation that don’t require infinite density to work. The universe we know today could have been created by a field with a positive vacuum energy losing most of its energy as it expanded. This would slow expansion to close to what we see today and that energy would create particles that become the particles in our universe. The Higgs field is an example of a field with a positive vacuum energy.
As far as I can tell, infinite density only arises if we allow space time to be continuous. If space time is really quantized (plank time and plank length) then at t=0 density is mass of the universe divided plank length ^3
Ofc this is probably just an analogy. Personaly, I would argue that any physics theory that results in a singularity is de facto incorrect.
Latest Answers