2 Matching Annotations
  1. Jun 2016
  2. arxiv.org arxiv.org
    1. Here, we prove thatarbitrarilyinhomo-geneous and anisotropic cosmologies with “flat” (includingtoroidal) and “open” (including compacthyperbolic) spatial topology that are initially expandingmust continue to expand forever at least insome region at a rate bounded from below by a positive number,despite the presence of arbitrarilylarge density fluctuations and/or the formation of black holes

      excellent talk by Matt Kleban on this in Utrecht, conclusion "There is no initial condition for inflation" in opposition to Steinhardt claims

  3. Feb 2016
  4. arxiv.org arxiv.org
    1. We describethe minimal modification required for self-acceleration and show that its maximum likelihood yieldsa 2.4σpoorer fit to cosmological observations compared to a cosmological constant, which, althoughmarginally still possible, questions the concept of cosmicacceleration from a genuine scalar-tensormodification of gravity.

      The observed GRB might not be connected, but still very interesting to ask what the implications of proving c_T=c_s to high precision. Future direct detection of GW with confirmed optical follow up will surely come soon.