Crossing w = -1 in Gauss-Bonnet Brane World with Induced Gravity |
| |
| Authors: | CAI Rong-Gen ZHANG Hong-Sheng WANG An-Zhong |
| |
| Institution: | Institute of Theoretical Physics, the Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China Institute of Theoretical Physics, the Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China CASPER, Department of Physics, Baylor University, 101 Bagby Avenue, Waco, TX 76706, USA |
| |
| 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. |
| |
| Keywords: | dark energy brane world scenario phantom divide |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
