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arXiv 0909.0351gr-qc
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$f(R)$ -引力中的类椭球行为

Phantom-Like Behavior in $f(R)$-Gravity

Kourosh Nozari, Tahereh Azizi

摘要:

我们研究了在$f(R)$ -引力模型的框架中可能实现的幻影状行为,其中在理论的物质部分中没有幻影场。通过对$f(R)$采用一些观测上可靠的分析,我们证明了在$f(R)$ -引力中实现类幻影行为是可能的,而不引入遭受不稳定性和违反零能量条件的幻影场.根据$f(R)$的选择,零能量条件在每个模型参数空间的某些子空间中得到满足。

英文摘要:

We investigate possible realization of the phantom-like behavior in the framework of $f(R)$-gravity models where there are no phantom fields in the matter sector of the theory. By adopting some observationally reliable ansatz for $f(R)$, we show that it is possible to realize phantom-like behavior in $f(R)$-gravity without introduction of phantom fields that suffer from instabilities and violation of the null energy condition. Depending on the choice of $f(R)$, the null energy condition is fulfilled in some subspaces of each model parameter space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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