Crossing w=1 in Gauss-Bonnet Brane World with Induced Gravity

作     者：CAI Rong-Gen ZHANG Hong-Sheng WANG An-Zhong 

作者机构：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 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2005年第44卷第5X期

页      面：948-954页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：中国科学院资助项目 科技部科研项目 

主　　题：dark energy brane world scenario phantom divide 

摘      要：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 worm with induced gravity, where a four-dimensional curvature scalar on the brahe and a five-dimensional Gauss-Bonnet term in the bu/k are present. In this realization, the Gauss-Bonnet term and the mass parameter in the bulk play a crucial role.