The Evolution of Dilatonic Universe with a Double Exponential Potential

Details The Evolution of Dilatonic Universe with a Double Exponential Potential The Evolution of Dilatonic Universe with a Double Exponential Potential

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ap%26ss.305..177h&link_type=abstract

Astrophysics and Space Science, Volume 305, Issue 2, pp.177-181

Astronomy and Astrophysics

Astrophysics

Dilaton, Dark Energy, Induced Gravity, Phantom, Attractor

Scientific paper

In this paper, dilaton in Weyl-Scaled induced gravitational theory is regarded as a candidate of dark energy. When the potential of dilaton field is taken as the form of a double exponential λ_1e^{-β1σ}+λ2e^{-β2σ}, we find that there exist attractor solutions in dilatonic dark energy model, and these attractors correspond to an equations of state ω = -1 and a cosmic density parameter Ω_{σ} = 1, which are important features for a dark energy model that can meet the current observations. We find out the sufficient condition of the existence of a late time de Sitter attractor.

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