LizR wrote:
On 11 November 2014 14:48, Bruce Kellett <[email protected]
<mailto:[email protected]>> wrote:
The AoT exists regardless of such processes.
I don't see how. The expansion made a state with no AOT turn
into one that had one, by cooling the plasma to the point where
a phase transition could occur.
No, we have gone as far as we can on this -- and you are wrong.
I would appreciate a short, simple explanation of why.
First, the expansion does not increase any entropy limit.
Second, we get the thermodynamic AoT without expansion.
In standard BB cosmology, the expansion cools the initial very hot
state. But it is not necessary to start with a hot BB to get an AoT. We
could image some different mechanism of cosmogenesis whereby the initial
state was a relatively thin cool gruel of hydrogen and a few other bits.
Something like in the current model when the universe is a few million
years old. Imagine it started in that state, but with no further
expansion. We would still get gravitational collapse around local
inhomogeneities, galaxies and stars would form. Planets and occasionally
life would arise. All within a thermodynamic AoT. In other words, we
could get to exactly where we are no without any expansion at all. So
expansion cannot be a necessary prerequisite for an AoT.
You have to beware of making contingent facts into apparent logical
necessities.
Bruce
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