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 Msg. #  Subject Posted by    Board    Date   
09334 Re: What is Twistor Theory? | Roger Penrose AND What came before Big Bang? Why he changed his mind.
   Graviton > In theories of quantum gravity, the graviton is the hypoth... 		Zimbler0   GRITZ   08 Jun 2025
 3:59 AM
09330 Re: What is Twistor Theory? | Roger Penrose AND What came before Big Bang? Why he changed his mind.
   ...Im pretty much going with the "Dark on the face of the deep" theory... 		ribit   GRITZ   07 Jun 2025
 11:54 PM

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Re: What is Twistor Theory? | Roger Penrose AND What came before Big Bang? Why he changed his mind.

By: De_Composed in GRITZ
Sat, 07 Jun 25 11:37 PM
Msg. 09329 of 09340
(This msg. is a reply to 09328 by Fiz)
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fizzy:

Re: “2:30 He explains that gravitons can spin left...but not right handed.”Very interesting post, fizzy. I thought it was odd that Penrose talked about gravity within the pre-universe, with the Standard Model describing a preliminary state which had to have been very, very, VERY hot with particles constantly popping into existence as mirrored pairs (even as some do today, they think) and promptly annihilating one another.

The Standard Model conjectures that we owe the particles that remain to the rapid expansion/cooling that came after the Big Bang. Particles formed in conditions of tremendous heat and pressure (and vary greatly in how much heat and pressure they need). As the new universe quickly expanded and cooled, there were points where various particles were permanently frozen into existence, never to be created again but also unable to annihilate if their partner had not formed when the freezing took place. In the case of gravitons, this happened when the universe had an average energy level of about 10^32° Kelvin. Gluons, which are thought to mediate the strong force, were frozen into existence at 10^28°. Photons, which mediate the electromagnetic force, were frozen into existence at 10^15°. W and Z bosons gave us the weak force at 10^12° Kelvin.

And this occurred in the first 1/10,000th of a second following the Big Bang. It was a happenin' place!

Before 10^-43rd of a second, there were no residual gravitons. It was still too hot. So why does Penrose talk about the effect of gravity on the pre-Big Bang universe? No gravitons = no gravity, right? I'm sure he's got an explanation.