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Autonomous dynamical system description of de Sitter evolution in scalar assisted f(R)−ϕ gravity.
- Source :
-
International Journal of Geometric Methods in Modern Physics . Dec2018, Vol. 15 Issue 12, pN.PAG-N.PAG. 9p. 3 Graphs. - Publication Year :
- 2018
-
Abstract
- In this paper we will study the cosmological dynamical system of an f (R) gravity in the presence of a canonical scalar field ϕ with an exponential potential by constructing the dynamical system in a way that it is rendered autonomous. This feature is controlled by a single variable m , which when it is constant, the dynamical system is autonomous. We focus on the m = 0 case which, as we demonstrate by using a numerical analysis approach, leads to an unstable de Sitter attractor, which occurs after N ∼ 6 0 e -foldings. This instability can be viewed as a graceful exit from inflation, which is inherent to the dynamics of de Sitter attractors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02198878
- Volume :
- 15
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- International Journal of Geometric Methods in Modern Physics
- Publication Type :
- Academic Journal
- Accession number :
- 133669226
- Full Text :
- https://doi.org/10.1142/S0219887818502122