Rainbow gravity

  • Thread starter wolram
  • Start date
  • #1
wolram
Gold Member
Dearly Missed
4,330
559
] arXiv:1310.2072 [pdf, ps, other]
Intermediate inflation from rainbow gravity
John D. Barrow, Joao Magueijo
Subjects: Cosmology and Extragalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc)
It is possible to dualize theories based on deformed dispersion relations and Einstein gravity so as to map them into theories with trivial dispersion relations and rainbow gravity. This often leads to "dual inflation" without the usual breaking of the strong energy condition. We identify the dispersion relations in the original frame which map into "intermediate" inflationary models. These turn out to be particularly simple: power-laws modulated by powers of a logarithm. The fluctuations predicted by these scenarios are near, but not exactly scale-invariant, with a red running spectral index. These dispersion relations deserve further study within the context of quantum gravity and the phenomenon of dimensional reduction in the ultraviolet.

Can some one interpret this paper in laymans term's as it seems to me to be an important paper and from what i can make out is very interesting.
 

Answers and Replies

  • #2
UltrafastPED
Science Advisor
Gold Member
1,912
216
This is an attempt to extend Einstein's General Relativity, and proposes some observational tests.

It will be significant if the tests support their model.
 

Suggested for: Rainbow gravity

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
665
  • Last Post
2
Replies
38
Views
6K
  • Last Post
Replies
10
Views
4K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
28
Views
8K
Replies
3
Views
4K
  • Last Post
3
Replies
72
Views
6K
  • Last Post
Replies
3
Views
914
Top