De sitter cosmology from Gauss-Bonnet dark energy with quantum effects

Emilio Elizalde, John Quiroga Hurtado, Héctor Iván Arcos

    Research output: Contribution to journalArticleResearchpeer-review

    6 Citations (Scopus)

    Abstract

    A Gauss-Bonnet dark energy model is considered. It is inspired by string/M-theory and also takes into account quantum contributions, which are introduced from a conformal quantum anomaly. The corresponding solutions for the Hubble rate, H, are studied starting from the Friedmann-Robertson-Walker equation. It is seen that, as a pure effect of the quantum contributions, a new solution for H exists in some region, which does not appear in the classical case. The behavior of all encountered solutions is studied with care, in particular the role played by the quantum correction term which depends on the number of matter fields in the stability of the solutions around its asymptotic value. It is argued that, contrary to what happens in the classical case, quantum effects remarkably lead to the realization of a de Sitter stage which corresponds to the inflation/dark energy stages, even for positive values of the f0 constant (coupling of the field with the Gauss-Bonnet invariant). © 2008 World Scientific Publishing Company.
    Original languageEnglish
    Pages (from-to)2159-2170
    JournalInternational Journal of Modern Physics D
    Volume17
    Issue number11
    DOIs
    Publication statusPublished - 1 Jan 2008

    Keywords

    • Conformal quantum anomaly
    • Dark energy
    • De Sitter cosmology
    • FRW equation
    • Gauss-Bonnet model
    • Hubble rate
    • Quantum effects
    • Stability of solutions

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