Monday, April 21, 2014

conformal cyclic cosmology

I forgot to post this a few weeks ago, but I saw one of the best lectures in a very long time at Matt's work's lunchtime colloquium, with Roger Penrose. Who is, as I'm sure I don't have to point out to very many people who might read this, a pretty awesome dude. (How convenient to have a boss who was a PhD advisee of one of the greatest physicists alive!)

Anyway, he's developed this alternative model of cosmology called conformal cyclic cosmology, and gave a fantastic presentation on it that even I could partially understand. The basic idea (as I understand it, ignoring the more confusing stuff about entropy and the black hole information paradox) is that in the far future of the universe, all mass will decay, resulting in universe described by special relativity, which can then be conformally mapped to an infinitely smaller universe, which then undergoes a new big bang and starts the cycle over again. And since bosons from the previous aeon/universe can be observed in the current universe, we can detect events from the previous aeon in the cosmic microwave background. He claims to have found concentric circles in the CMB that correspond to energy released during sequential collisions of supermassive black holes, and says the b-mode observations that were recently all over the news as a smoking gun for inflationary theory are also consistent with CCC (although he didn't get into explaining that more completely.)

So, go read about CCC if you wanna learn some really cool stuff.

Also, I'm totally adopting his presentation style. He actually used hand-drawn transparencies (ok, I would at least scan mine into a pdf) with bright colorful text and skillfully-drawn diagrams of spacetime. No overcrowded powerpoint slides, and lots of colors! I love.

And while we're on the topic of Penrose, Matt is currently very excited about this book by him on an overview of the laws of the universe. It's definitely on my list.

2 comments:

Mitus Mita said...

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hopy said...

he developed this alternative model of cosmology called conformal cyclic universe , and has great presentation on it that even I can understand part . The basic idea is that in the far future of the universe , all mass will decay , resulting universe is described by special relativity , which can then be mapped to a conformal infinity universe small , then experienced a huge explosion and begin a new life cycle . And since bosons from Aeon / previous universe can be observed in the universe today , we can detect events from the previous aeon in the cosmic microwave background . He claimed to have found in the CMB concentric circles corresponding to the energy liberated during the constant collision of supermassive black holes , and said that the b - mode observer is on all recent the news as a smoking gun for inflation theory is consistent with CCC ) " a fun thing for his works , I have read many articles , or presentations , but here is my new problem began met .