Dark Energy from Gauss-Bonnet and non-minimal couplings

Abstract

We consider a scalar-tensor model of dark energy with Gauss-Bonnet and non-minimal couplings. Exact cosmological solutions were found in absence of potential, that give equations of state of dark energy consistent with current observational constraints, but with different asymptotic behaviors depending on the couplings of the model. A detailed reconstruction procedure is given for the scalar potential and the Gauss-Bonnet coupling for any given cosmological scenario. Particularly, we consider conditions for the existence of a variety of cosmological solutions with accelerated expansion, including quintessence, phantom, de Sitter, Little Rip. For the case of quintessence and phantom we have found a scalar potential of the Albrecht-Skordis type, where the potential is an exponential with a polynomial factor.

12 pages, 5 figures, to appear in PRD

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Cited by in corpus (6)

• Observational Tests of Gauss-Bonnet Like Dark Energy Model
• Interacting Models of Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity
• Slow-roll inflation from massive vector fields non-minimally coupled to gravity
• Cosmological fluids with boundary term couplings
• Dynamical analysis for a scalar-tensor model with Gauss-Bonnet and non-minimal couplings
• Primordial blackholes from Gauss-Bonnet-corrected single field inflation