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Crossing w=-1 in Gauss-Bonnet Brane World with Induced Gravity | Rong-Gen Cai
; Hong-Sheng Zhang
; Anzhong Wang
; | Date: |
21 May 2005 | Journal: | Commun.Theor.Phys. 44 (2005) 948 | Subject: | hep-th astro-ph gr-qc | Abstract: | Recent type Ia supernovas data seemingly favor a dark energy model whose equation of state $w(z)$ crosses -1 very recently, which is a much more amazing problem than the acceleration of the universe. In this paper we show that it is possible to realize such a crossing without introducing any phantom component in a Gauss-Bonnet brane world with induced gravity, where a four dimensional curvature scalar on the brane and a five dimensional Gauss-Bonnet term in the bulk are present. In this realization, the Gauss-Bonnet term and the mass parameter in the bulk play a crucial role. | Source: | arXiv, hep-th/0505186 | Services: | Forum | Review | PDF | Favorites |
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