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Interesting video on infrared modifications to gravity

  1. Feb 10, 2013 #1

    Haelfix

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    This is a talk by Nima Arkani Hamed of IAS at Princeton from a few days ago, where he discusses his thoughts on the dark energy problems of cosmology and various popular research programs aimed at addressing it by modifying General relativity at large distances (examples like DGP, Galileons, Ghost condensation etc etc).

    https://webcast.stsci.edu/webcast/detail.xhtml?talkid=3398&parent=1

    A very interesting presentation, although I don't buy the causality arguments by themselves (the black hole thermodynamic problem is much more convincing).

    Nevertheless there is some interesting material well known to particle physicists regarding the inevitability of GR, that is perhaps not as well known elsewhere.
     
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