Before the Big Bang? a new view (Origins)

by David Turell @, Saturday, March 18, 2023, 18:55 (10 days ago) @ David Turell

From previously: DAVID: I'm only presenting current theory. "Heat death' and cold torn apart universe are all the same theory using different terms. I certainly agree what happened before the Big Bang is call foolish guesswork.

Here is Ethan Siegel:

"For many decades, these two notions of the Big Bang — of the hot dense state that describes the early Universe and the initial singularity — were inseparable.

"But beginning in the 1970s, scientists started identifying some puzzles surrounding the Big Bang, noting several properties of the Universe that weren’t explainable within the context of these two notions simultaneously. When cosmic inflation was first put forth and developed in the early 1980s, it separated the two definitions of the Big Bang, proposing that the early hot, dense state never achieved these singular conditions, but rather that a new, inflationary state preceded it. There really was a Universe before the hot Big Bang, and some very strong evidence from the 21st century truly proves that it’s so.

"Although we’re certain that we can describe the very early Universe as being hot, dense, rapidly expanding, and full of matter-and-radiation — i.e., by the hot Big Bang — the question of whether that was truly the beginning of the Universe or not is one that can be answered with evidence. The differences between a Universe that began with a hot Big Bang and a Universe that had an inflationary phase that precedes and sets up the hot Big Bang are subtle, but tremendously important. After all, if we want to know what the very beginning of the Universe was, we need to look for evidence from the Universe itself.


"...if we can search the Universe for signals that appear on super-horizon scales, that’s a great way to discriminate between a non-inflationary Universe that began with a singular hot Big Bang (which shouldn’t have them at all) and an inflationary Universe that possessed an inflationary period prior to the start of the hot Big Bang (which should possess these super-horizon fluctuations).


"What you need to do is perform a correlation analysis: between the polarized light and the temperature fluctuations in the cosmic microwave background and correlate them on the same angular scales as one another. This is where things get really interesting, because this is where observationally looking at our Universe allows us to tell the “singular Big Bang without inflation” and the “inflationary state that gives rise to the hot Big Bang” scenarios apart!


"The t that we see super-horizon fluctuations, and that we see them not merely from reionization but as they are predicted to exist from inflation, is a slam dunk: the non-inflationary, singular Big Bang model does not match up with the Universe we observe. Instead, we learn that we can only extrapolate the Universe back to a certain cutoff point in the context of the hot Big Bang, and that prior to that, an inflationary state must have preceded the hot Big Bang.


"... the super-horizon fluctuation test is an easy one to perform and one that’s completely robust.

"All on its own, it’s enough to tell us that the Universe didn’t start with the hot Big Bang, but rather that an inflationary state preceded it and set it up. Although it’s generally not talked about in such terms, this discovery, all by itself, is easily a Nobel-worthy achievement. "

Comment: I've left out all the complex background information he discusses. We still have the appearance of " something from nothing". The beginning is changed to inflation first, then the Bang

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