Asymptotically safe inflation
Abstract
Inflation is studied in the context of asymptotically safe theories of gravitation. Conditions are explored under which it is possible to have a long period of nearly exponential expansion that eventually comes to an end.
- Publication:
-
Physical Review D
- Pub Date:
- April 2010
- DOI:
- arXiv:
- arXiv:0911.3165
- Bibcode:
- 2010PhRvD..81h3535W
- Keywords:
-
- 04.60.-m;
- 04.50.Kd;
- 11.10.Hi;
- 98.80.Cq;
- Quantum gravity;
- Modified theories of gravity;
- Renormalization group evolution of parameters;
- Particle-theory and field-theory models of the early Universe;
- High Energy Physics - Theory;
- Astrophysics - Cosmology and Extragalactic Astrophysics;
- General Relativity and Quantum Cosmology
- E-Print:
- 17 pages. An added footnote discusses the problem of ghost poles in these theories, and an added section applies the general results of the paper to actions with no more than four spacetime derivatives. Version accepted for publication in Physical Review D.