Tree-level string cosmology

Richard Easther, Keiichi Maeda, David Wands

    Research output: Contribution to journalArticle

    129 Citations (Scopus)

    Abstract

    In this paper we examine the classical evolution of a cosmological model derived from the low-energy tree-level limit of a generic string theory. The action contains the metric, dilaton, central charge and an antisymmetric tensor field. We show that with a homogeneous and isotropic metric, allowing spatial curvature, there is a formal equivalence between this system and a scalar field minimally coupled to Einstein gravity in a spatially flat metric. We refer to this system as the shifted frame and using it we describe the full range of cosmological evolution that this model can exhibit. We show that generic solutions begin (or end) with a singularity. As the system approaches a singularity the dilaton becomes large and loop corrections will become important.

    Original languageEnglish
    Pages (from-to)4247-4256
    Number of pages10
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume53
    Issue number8
    Publication statusPublished - 1996 Apr 15

    Fingerprint

    Cosmology
    cosmology
    strings
    Dilaton
    Strings
    Metric
    string theory
    Singularity
    equivalence
    Cosmological Models
    curvature
    Antisymmetric
    tensors
    String Theory
    gravitation
    scalars
    Scalar Field
    Albert Einstein
    Gravity
    Tensor

    ASJC Scopus subject areas

    • Mathematical Physics
    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

    Cite this

    Tree-level string cosmology. / Easther, Richard; Maeda, Keiichi; Wands, David.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 53, No. 8, 15.04.1996, p. 4247-4256.

    Research output: Contribution to journalArticle

    Easther, Richard ; Maeda, Keiichi ; Wands, David. / Tree-level string cosmology. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 1996 ; Vol. 53, No. 8. pp. 4247-4256.
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