The fate of (phantom) dark energy universe with string curvature corrections

M. Sami, Alexey Toporensky, Peter V. Tretjakov, Shinji Tsujikawa

Research output: Contribution to journalArticle

138 Citations (Scopus)

Abstract

We study the evolution of (phantom) dark energy universe by taking into account the higher-order string corrections to Einstein-Hilbert action with fixed dilaton and modulus fields. While the presence of a cosmological constant gives stable de Sitter fixed points in the cases of heterotic and bosonic strings, no stable de Sitter solutions exist when a phantom fluid is present. We find that the universe can exhibit a Big Crunch singularity with a finite time for type II string, whereas it reaches a Big Rip singularity for heterotic and bosonic strings. Thus the fate of dark energy universe crucially depends upon the type of string theory under consideration.

Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume619
Issue number3-4
DOIs
Publication statusPublished - 2005 Jul 21
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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