Unimodular f(G) gravity

In this paper we study a modified version of unimodular general relativity in the context of f ( G ), G denoting the Gauss–Bonnet invariant. We focus on Bianchi-type I and Friendmann–Robertson–Walker universes and search for unimodular f ( G ) models according to the de Sitter and power-law solution...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2017-09, Vol.77 (9), p.1-11, Article 607
Main Author: Houndjo, M. J. S.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Elementary Particles
Gravitation
Hadrons
Heavy Ions
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
Relativity
String Theory
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Summary:In this paper we study a modified version of unimodular general relativity in the context of f ( G ), G denoting the Gauss–Bonnet invariant. We focus on Bianchi-type I and Friendmann–Robertson–Walker universes and search for unimodular f ( G ) models according to the de Sitter and power-law solutions. Assuming unimodular f ( G ) gravity as a perfect fluid and making use of the slow-roll parameters, the inflationary model has been reconstructed in concordance with the Planck observational data. Moreover, we investigate the realization of the bounce and loop quantum cosmological ekpyrotic paradigms. Assuming suitable and appropriate scale factors, unimodular f ( G ) models able to reproduce superbounce and ekpyrotic scenarios have been reconstructed.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-5171-4