Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields

Emilio Elizalde, Shin’ichi Nojiri, Sergei D. Odintsov, Diego Sáez-Gómez, Valerio Faraoni

    Research output: Contribution to journalArticleResearchpeer-review

    151 Citations (Scopus)

    Abstract

    © 2016, International Journal of Agricultural and Biological Engineering. All rights reserved. We consider the reconstruction technique in theories with a single or multiple (phantom and/or canonical) scalar fields. With the help of several examples, it is demonstrated explicitly that the universe expansion history, unifying early-time inflation and late-time acceleration, can be realized in scalar-tensor gravity. This is generalized to the theory of a scalar field coupled nonminimally to the curvature and to a Brans-Dicke-like theory. Different examples of unification of inflation with cosmic acceleration, in which de Sitter, phantom, and quintessence type fields play the fundamental role-in different combinations-are worked out. Specifically, the frame dependence and stability properties of de Sitter space scalar field theory are studied. Finally, for two-scalar theories, the late-time acceleration and early-time inflation epochs are successfully reconstructed, in realistic situations in which the more and more stringent observational bounds are satisfied, using the freedom of choice of the scalar field potential, and of the kinetic factor.
    Original languageEnglish
    Article number106005
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume77
    Issue number10
    DOIs
    Publication statusPublished - 1 Jan 2008

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