Research PaperNo Access
Cosmology in a model with Lagrange multiplier, Gauss–Bonnet and nonminimal kinetic couplings
https://doi.org/10.1142/S0218271819501712Cited by:2 (Source: Crossref)
Abstract
A scalar-tensor model with Gauss–Bonnet and nonminimal kinetic couplings is considered, in which ghost modes are eliminated via a Lagrange multiplier constraint. A reconstruction procedure is devised for the scalar potential and Lagrange multiplier, valid for any given cosmological scenario. In particular, inflationary and dark energy cosmologies of different types (power-law, Little-Rip, de Sitter, quasi-de Sitter) are reconstructed in such models. It is shown that, for various choices of the kinetic coupling terms, it is possible to obtain a viable inflationary phenomenology compatible with the most accurate values of the observational indices.
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