- #1
timmdeeg
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- The question
doesn't Ω=1 require k=0 at the big bang (before inflation started)?"
was answered affirmatively [url=https://www.physicsforums.com/threads/lambda-cdm-model-and-spatial-flatness.979086/#post-6249196]here[/url]. However I should have asked "does" instead of "doesn't?
So to clarify this issue, does Ω=1 require k=0 at the big bang?
If yes would this mean that we have a fine-tuning problem regarding the initial density of the universe here (comparable to the *old* Flatness-Problem)?
https://en.wikipedia.org/wiki/Flatness_problemThe flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe.
The fine-tuning problem of the last century was solved by introducing the theory of inflation which flattens out any initial curvature so that our actual universe looks almost spatially flat. The inflation doesn't create euclidean flatness though.
Would the claim that our universe has euclidean geometry raise the old fine-tuning problem regarding the initial energy densities again?
The fine-tuning problem of the last century was solved by introducing the theory of inflation which flattens out any initial curvature so that our actual universe looks almost spatially flat. The inflation doesn't create euclidean flatness though.
Would the claim that our universe has euclidean geometry raise the old fine-tuning problem regarding the initial energy densities again?