Friday, April 15, 2011

Nima at KITP

Check out the latest Arkani-Hamed talk, where he says that maybe the new theory is really The Grothendieck Direction!
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8 comments:

  1. MetatronApril 15, 2011 at 6:52 PM

    Well, if M is for motive, then it's still just M-theory. ;)

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  2. KeaApril 15, 2011 at 7:07 PM

    Lol, kneemo. But Arkani-Hamed started with T theory (for T just a new letter) ... and ended the talk with P theory, where P stands for polytope!

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  3. KeaApril 15, 2011 at 7:10 PM

    And when discussing cyclic structures on Grassmannians, he refers to Goncharov's papers. OMG, check out THIS and this ...

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  4. UllaApril 16, 2011 at 7:10 AM

    "Gravity + QM = spacetime is doomed"

    Can it be said clearer? By necessity it means a varying speed of light or ZEO.

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  5. KeaApril 16, 2011 at 8:44 AM

    Ulla, Nima is a very clear speaker, and this is one of his better introductory talks. As for the varying c ... probably they do not realise this yet. There was a discussion session, but it seems it was private.

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  6. UllaApril 16, 2011 at 9:16 AM

    He had a picture of complex harder space that went in between x,y-lines. Could it be the Lie-algebra? Then maybe Lisi's E8 can fit into this?

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  7. MetatronApril 16, 2011 at 10:20 AM

    The geometry, as far as I recall, seemed to be determined by the placement of internal twistor propogators. This was at least the case with polygon triangulation equivalence classes.

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  8. KeaApril 16, 2011 at 11:50 AM

    So you mean that they do know about c variation, in some sense? Yes, but that is a very different thing from understanding the physical consequences, such as supernovae redshifts. Ulla, Lisi did not invent the Lie group E8.

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