Cosmological inflation is discussed in the framework of F (R, G) gravity where F is a generic function of the curvature scalar R and the Gauss-Bonnet topological invariant G. The main feature that emerges in this analysis is the fact that this kind of theory can exhaust all the curvature budget related to curvature invariants without considering derivatives of R, Rμν, Rλσμν etc. in the action. Cosmological dynamics results driven by two effective masses (lenghts) related to the R scalaron and the G scalaron working respectively at early and very early epochs of cosmic evolution. In this sense, a double inflationary scenario naturally emerges.
Cosmological double inflation in F (R, G) gravity / De Laurentis, M.. - (2018), pp. 1141-1146. (Intervento presentato al convegno 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories tenutosi a University of Rome "La Sapienza", ita nel 2015) [10.1142/9789813226609_0075].
Cosmological double inflation in F (R, G) gravity
De Laurentis M.
2018
Abstract
Cosmological inflation is discussed in the framework of F (R, G) gravity where F is a generic function of the curvature scalar R and the Gauss-Bonnet topological invariant G. The main feature that emerges in this analysis is the fact that this kind of theory can exhaust all the curvature budget related to curvature invariants without considering derivatives of R, Rμν, Rλσμν etc. in the action. Cosmological dynamics results driven by two effective masses (lenghts) related to the R scalaron and the G scalaron working respectively at early and very early epochs of cosmic evolution. In this sense, a double inflationary scenario naturally emerges.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
