Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

New life for Galilean creation?

  1. Apr 23, 2015 #1

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    Galilean creation is one of a number of proposed alternatives to inflationary cosmology. This paper; http://arxiv.org/abs/1504.05710, Galilean Creation of the Inflationary Universe, takes the idea a step further by showing how it can transit smoothly to the single field inflationary model favored by WMAP and Planck.
     
  2. jcsd
  3. Apr 23, 2015 #2

    Drakkith

    User Avatar

    Staff: Mentor

    Got a decent link explaining the basics of Galilean Creation? The paper is just a tad beyond my understanding.
     
  4. Apr 23, 2015 #3

    Chronos

    User Avatar
    Science Advisor
    Gold Member

  5. Apr 23, 2015 #4

    Chalnoth

    User Avatar
    Science Advisor

    Hmm. Apparently this model requires superluminal excitations. That makes it seem rather unlikely.
     
  6. Apr 23, 2015 #5
    Galilieo was probably trying to explain things in a manner which would not irritate the inquisitors too much.
     
  7. Apr 23, 2015 #6

    Chalnoth

    User Avatar
    Science Advisor

    This is a different idea. It's a recent alternative to inflation that relies upon a big rip-like scenario.
     
  8. Apr 23, 2015 #7

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    Superluminal excitations are discussed, but, not deemed unavoidable under the Galilean Genesis model.
     
  9. Apr 24, 2015 #8

    Chalnoth

    User Avatar
    Science Advisor

    Sounded like they were pretty unavoidable to me. If you read the last paragraph in their conclusion, they basically say, "Well, maybe they can be avoided. We don't know how, but maybe."
     
  10. Apr 24, 2015 #9

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    I agree, if the superluminal issue cannot be resolved, the model is suspect. Later papers appear promising on this count.
     
  11. Aug 6, 2015 #10
    That's a nice idea, except that it had been suggested and studied thoroughly 6 months earlier in

    http://inspirehep.net/record/1320024

    (this model does not lead to superluminal propagation)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: New life for Galilean creation?
  1. Particle creation (Replies: 9)

  2. Creation of matter (Replies: 9)

  3. Creation of matter (Replies: 2)

Loading...