Work

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

Year: 2005

Type: article

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: Communications in Theoretical Physics

DOI: 10.1088/6102/44/5/948

Authors: Rong-Gen Cai, Hong-Sheng Zhang, An-Zhong Wang

Institutions: Chinese Academy of Sciences, Institute of Theoretical Physics, Baylor University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: National Natural Science Foundation of China

Award: 全息性,暴胀模型和暗能量