Statefinder Diagnostic for Dilaton Dark Energy

Details Statefinder Diagnostic for Dilaton Dark Energy Statefinder Diagnostic for Dilaton Dark Energy

2008-02-16

arxiv.org/abs/0802.2320v2

Astrophys.SpaceSci.315:175-179,2008

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, 4 figures, type errors corrected, reference no. changed, accepted by Astrophysics and Space Science

Scientific paper

10.1007/s10509-008-9810-y

Statefinder diagnostic is a useful method which can differ one dark energy model from the others. The Statefinder pair $\{r, s\}$ is algebraically related to the equation of state of dark energy and its first time derivative. We apply in this paper this method to the dilaton dark energy model based on Weyl-Scaled induced gravitational theory. We investigate the effect of the coupling between matter and dilaton when the potential of dilaton field is taken as the Mexican hat form. We find that the evolving trajectory of our model in the $r-s$ diagram is quite different from those of other dark energy models.

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