Equations of state in the Brans–Dicke cosmology

被引：0
作者：
Hyung Won Lee
Kyoung Yee Kim
Yun Soo Myung
机构：
[1] Inje University,Institute of Basic Science and School of Computer Aided Science
来源：
The European Physical Journal C | 2011年 / 71卷
关键词：
Gravity Model; Bianchi Identity; Cold Dark Matter; Effective Equation; Jordan Frame;
D O I：
暂无
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学科分类号：
摘要：
We investigate the Brans–Dicke (BD) theory with the potential as cosmological model to explain the present accelerating universe. In this work, we consider the BD field as a perfect fluid with the energy density and pressure in the Jordan frame. Introducing the power-law potential and the interaction with the cold dark matter, we obtain the phantom divide which is confirmed by the native and effective equation of state. Also we can describe the metric f(R) gravity with an appropriate potential, which shows a future crossing of the phantom divide in viable f(R) gravity models when employing the native and effective equations of state.
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