Cosmologies from higher-order string corrections

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We study cosmologies based on low-energy effective string theory with higher-order string corrections to a tree-level action and with a modulus scalar field (dilaton or compactification modulus). In the presence of such corrections it is possible to construct nonsingular cosmological solutions in the context of Pre-Big-Bang and Ekpyrotic universes. We review the construction of nonsingular bouncing solutions and resulting density perturbations in Pre-Big-Bang and Ekpyrotic models. We also discuss the effect of higher-order string corrections on a dark energy universe and show several interesting possibilities of the avoidance of future singularities.

Original languageEnglish
Pages (from-to)302-315
Number of pages14
JournalAnnalen der Physik (Leipzig)
Volume15
Issue number4-5
DOIs
Publication statusPublished - 2006 Apr
Externally publishedYes

Keywords

  • Curvature corrections
  • Dark energy
  • String theory

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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