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- Title
Inflationary cosmology from quantum conformal gravity.
- Authors
Jizba, Petr; Kleinert, Hagen; Scardigli, Fabio
- Abstract
We analyze the functional integral for quantum conformal gravity and show that, with the help of a Hubbard-Stratonovich transformation, the action can be broken into a local quadratic-curvature theory coupled to a scalar field. A one-loop effective-action calculation reveals that strong fluctuations of the metric field are capable of spontaneously generating a dimensionally transmuted parameter which, in the weak-field sector of the broken phase, induces a Starobinsky-type f( R)-model with a gravi-cosmological constant. A resulting non-trivial relation between Starobinsky's parameter and the gravi-cosmological constant is highlighted and implications for cosmic inflation are briefly discussed and compared with the recent PLANCK and BICEP2 data.
- Subjects
INFLATIONARY universe; QUANTUM confinement effects; GRAVITY; PARAMETER estimation; PHASE transitions; COSMOLOGICAL constant
- Publication
European Physical Journal C -- Particles & Fields, 2015, Vol 75, Issue 6, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-015-3441-6