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I Signatures of extra dimensions in gravitational waves

  1. May 19, 2017 #1
    Signatures of extra dimensions in gravitational waves
    David Andriot, Gustavo Lucena Gómez
    (Submitted on 24 Apr 2017)
    Considering gravitational waves propagating on the most general 4+N-dimensional space-time, we investigate the effects due to the N extra dimensions on the four-dimensional waves. All wave equations are derived in general and discussed. On Minkowski4 times an arbitrary Ricci-flat compact manifold, we find: a massless wave with an additional polarization, the breathing mode, and extra waves with high frequencies fixed by Kaluza-Klein masses. We discuss whether these two effects could be observed.
    Comments: 21 pages + appendices, comments welcome!
    Subjects: High Energy Physics - Theory (hep-th); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)
    Cite as: arXiv:1704.07392 [hep-th]
    (or arXiv:1704.07392v1 [hep-th] for this version)

    Any evaluation of this proposal? GR in 4 D has one prediction and non observation of additional polarization implies GR in 4D is correct, no extra dimensions.

    In string theory, are the extra 6 spatial dimenions considered frozen, immutable for all eternity, while the 3 large spatial dimensions can curve as described by Einstein?

    Were those extra 6 dimensions frozen from the very beginning of time or does string theory state the universe start out as 10 flat dimensions then at some time 6 became compactified and 3 remain large and 1 became time?
     
  2. jcsd
  3. May 24, 2017 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
     
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