统一$f(R)$ -引力背景动力学和扰动的研究
Unifying the study of background dynamics and perturbations in $f(R)$-gravity
摘要:
在本文中,我们将展示如何协变规范不变方程的标量,矢量和张量扰动的一般$f(R)$ -引力理论的演变可以重铸,以利用动力系统方法的力量。这样,最近的结果描述的背景FRW模型的动力学可以很容易地与这些方程相结合,以揭示重要的细节有关的宇宙模型在四阶引力的演变。
英文摘要:
In this paper we show how the covariant gauge invariant equations for the evolution of scalar, vector and tensor perturbations for a generic $f(R)$-gravity theory can be recast in order to exploit the power of dynamical system methodology. In this way, recent results describing the dynamics of the background FRW model can be easily combined with these equations to reveal important details pertaining to the evolution of cosmological models in fourth order gravity.
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