The Fate of (phantom) dark energy universe with string curvature corrections
Apr, 2005
Citations per year
Abstract:
We study the evolution of (phantom) dark energy universe by taking into account the higher-order string corrections to Einstein-Hilbert action with a fixed dilaton. 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.- 98.70.Vc
- dark energy: phantom
- string: correction
- singularity
- cosmological constant
- space-time: de Sitter
- stability
References(104)
Figures(0)