Before the Big Bang 11: Did the Universe Create itself ? The PTC model

0:00 Introduction
0:45 NIayesh's story
1:15 Beth's story
2:25 relativity
3:26 Gott & Li model
6:23 origins of the PTC model
8:17 PTC periodic time cosmology
10:55 Penrose cyclic model
13:01 Sir Roger Penrose
14:19 CCC and PTC
15:45 conformal rescaling and the CMB
17:28 assumptions
18:41 why a time loop?
20:11 empirical test
23:96 predcitions
26:19 inflation vs PTC
30:22 gravitational waves
31:40 cycles and the 2nd law
32:54 paradoxes
34:08 causality
35:17 immortality in a cyclic universe
38:02 eternal return
39:21 quantum gravity
39:57 conclusion

Elizabeth Gould has asked to make this clarification in the written text " "Despite the availability of infinite time in the periodic time model, this doesn't lead to thermalization in a typical time-evolution scenario, and therefore doesn't, strictly speaking, solve the problem related to thermalization in the power spectrum. The reason for this is that, unlike bounce models with a net expansion each cycle, our model has an effective contraction during the conformal phases. Periodic time, therefore, has a unique character in which it reuses the power spectrum from the previous cycles, which is confined to a given form due to the constraints of the system, rather than removing the old power spectrum and needing to produce a new one."

[SedatKPunkt]

Yes…that was…or is… *not only* a *_MUST-WATCH_* *but rather* *_MUST-WATCH-AGAIN_* or *even a* *in order to increase the own understanding and improve its perception over time*

[HebaruSan]

It's so great that people are building on Penrose's mind-bending ideas!

[allgodsmyth]

I may have already watched this video an infinite number of times, but I'm still blown away by its presentation and profundity. This series suggests that perhaps the greatest accomplishment of human beings may not be what we know about the universe, but the many and varied ways we can imagine universes may come to be. Bravo!

[CosmoPhiloPharmaco]

Wow, I wasn't expecting this new documentary, Phil. Great graphics, 3D animations and explanations. It is professional work.

[BenGrem]

Ooo! Deeply excited for a new cosmological origins video from you! Thank you for your hard work and quality content!

[GGrev]

Been watching you for so many years now!

[Nunorico]

Amazing video. Amazing concept. Always reminds me of Calvin's quote for Hobes "If people sat outside and looked at the stars each night, I'll bet they'd live a lot differently"

[mateuszchmielinski]

Finaly, Great series came back! Cheers!

[arbitool]

My goodness, what took you so long! Didn't know you released a new episode. Instant play!

[CaseyWebb-dz]

It may be my own confirmation bias rearing its complacent head, but whatever, another peice i consider as fascinating and awesome as the previous ones. Thanks for the great content and thanks to everybody involved for all the hard work.

[trikkinikki]

Delighted to see the reaper hasnt taken you yet and you're still making amazing content. Thanks for this one of a kind channel. No one else is doing quite what you are.

[drasticmeasuresislam]

It's mind bending to think of the universe potentially not being a cause and effect reality, at least at some level. Great video as always Phil.

[Mobiusc]

I actually came up with a extremely similar model of the Universe 50 years ago as a sick young child, and developed it over time. The difference with my model is that mine uses the shape of a 4D Klien bottle.. a 4D mobius strip.. just like the infinity sign. It consists of a flat 3D space time curved inside a 4th spacetime dimension. The whole large scale Universe is curved back into the small, spread out everywhere. The concept is fairly easy to envision if you take 'scale' as a 4th spatial dimension with Time. Space Time is 4D not 3+1.
A recent paper has found evidence of Time running slower at far distances in accordance with the curved Time model.
Space Time curves within inertial reference frames along the 4 spatial dimension of 'scale' and the red shift of the Universe is a direct consequences of this.
There was no Big Bang, the Universe evolves from the very small and spreads out along the scale dimension towards the larger scales. Reminscent of a conveyor belt with one end the small scale Universe, and the other end large scale and it is continually moving in one direction.
Out of the quantum world matter forms, accumulates into large clouds of gas of hydrogen that form galaxies that form clusters that move away towards the Universes event horizon and then back into the quantum world again. As you say the Universe creates itself.
Time and 'Scale' are not a linear dimension, they are curved onto one another... the infinitesmally small being connected to the infinitely large... and the whole Universe is a 4D Blackhole. A Blackhole in the shape of a Klien bottle (4D mobius strip)
Indeed the reason why an election is missing for half its spin (its a spin is 720 degrees (spin1/2)) is that it is missing on the other side of the 4D mobius for half the time. :-)

[Jaggerbush]

I wish there was more Elizabeth on YouTube - shes interesting but I cant seem to find her anywhere but here.

This show is great as always.

[paulmichaelfreedman]

If the universe repeats but every time has slightly different evolution... we're in essence talking about a serial multiverse, where all universes happen one after the other (the normal multiverse assumes all of them exist simultaneously)

[dmon]

Thank you, so much looking forward for next episode.

[AllanSegalMD]

Enjoying toying with the idea of PeriodicTCosmology. Hard to conceive a fully expanded universe giving rise to new self. Thanks guys

[robjohnston]

I was already completely devoted to the genius of Sir Roger Penrose ... but when I discovered that he, and his father, INVENTED the "Never-ending Staircase" and gave the design to MC Escher .... I was so blown away that ANYTHING he says is now MY GOSPEL!
SO .... "Cyclic Conformal Cosmology" MUST BE TRUE!!!

[tjarksibley]

This is entertaining for everyone who has knowledge about the common theories. The only thing that bugs me is the odds of a second me or you in a different cycle. Even with ininity involved the chances for a second Sol System, earth, humans, human history e.g. wars, illness and so forth.... chance is infinitifly slim. I still think everyone of us is infinitifly lucky to be around right now. Cheers

[hariskhan-jw]

Are you working on part 12? if so when is it coming?