Date: 26/10/2019 11:32:59
From: Tau.Neutrino
ID: 1453725
Subject: Physicists simulate critical 'reheating' period that kickstarted the Big Bang

Physicists simulate critical ‘reheating’ period that kickstarted the Big Bang

As the Big Bang theory goes, somewhere around 13.8 billion years ago the universe exploded into being, as an infinitely small, compact fireball of matter that cooled as it expanded, triggering reactions that cooked up the first stars and galaxies, and all the forms of matter that we see (and are) today.

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Date: 26/10/2019 22:51:59
From: transition
ID: 1454122
Subject: re: Physicists simulate critical 'reheating' period that kickstarted the Big Bang

read that, not that understand much of

“….a phenomenon known as nonminimal coupling..”

https://en.wikipedia.org/wiki/Minimal_coupling

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Date: 28/10/2019 22:07:51
From: mollwollfumble
ID: 1454626
Subject: re: Physicists simulate critical 'reheating' period that kickstarted the Big Bang

transition said:


read that, not that understand much of

“….a phenomenon known as nonminimal coupling..”

https://en.wikipedia.org/wiki/Minimal_coupling

> Just before the Big Bang launched the universe onto its ever-expanding course, physicists believe, there was another, more explosive phase of the early universe at play: cosmic inflation

Don’t you just hate it when reporters refer to the “big bang” as the epoch after cosmic inflation, or even as the period of cosmic inflation? That misuse of the English language is so annoyingly incorrect. The big bang was before the period of cosmic inflation.

> post-inflation reheating period

That’s way down the track.

> It’s this bridge period where all hell breaks loose and matter behaves in anything but a simple way.

Yes. One of them, anyway :-)

> Kaiser and his colleagues simulated in detail how multiple forms of matter would have interacted during this chaotic period at the end of inflation. Their simulations show that the extreme energy that drove inflation could have been redistributed just as quickly, within an even smaller fraction of a second.

Huh? No. Unless i misunderstand.

> faster and more efficient if quantum effects modified the way that matter responded to gravity at very high energies,

Oh, that. Wake me when someone figures out a unification of quantum mechanics and general relativity.

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