ΛcDM universe in f(R) gravity

Peter K.S. Dunsby, Emilio Elizalde, Rituparno Goswami, Sergei Odintsov, Diego Saez-Gomez

    Research output: Contribution to journalArticleResearchpeer-review

    101 Citations (Scopus)

    Abstract

    Several different explicit reconstructions of f(R) gravity are obtained from the background Friedmann-Laîmatre-Robertson-Walker expansion history. It is shown that the only theory whose Lagrangian is a simple function of the Ricci scalar R, that admits an exact ΛCDM expansion history, is standard general relativity with a positive cosmological constant and the only way to obtain this behavior of the scale factor for more general functions of R is to add additional degrees of freedom to the matter sector. © 2010 The American Physical Society.
    Original languageEnglish
    Article number023519
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume82
    Issue number2
    DOIs
    Publication statusPublished - 22 Jul 2010

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