arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.3598gr-qc
收藏

关于Ricci标量特殊形式下与广义相对论等价的f(R)理论

On f(R) theories equivalent to general relativity for a specific form of the Ricci scalar

Amine Benachour

摘要:

本文证明了f(R)函数导致广义相对论与f(R)理论等价的充分必要条件,即对于特定Ricci标量的时空,广义相对论与f(R)理论必然有相同的解.我们展示了这个条件及其后果如何允许得到这样的功能,并给出了可能性,以满足条件的参数的任何类的f(R)的功能,使GR和这类理论将有完全相同的解决方案。作为一个例子,给出了暗能量的著名模型R+α \b{eta}^{1-p} R^{p},以及FLRW度规,其中表明只存在一类具有完全相同GR标度因子的f(R)理论。

英文摘要:

We prove the necessary and the sufficient condition on the f(R) function leading to the equivalence of general relativity and the f(R) theory in the sense that for a spacetime with specific Ricci scalar, GR and the f(R) theory will necessarily have the same solutions. We show how this condition and its consequences allow to get such functions and give the possibility to fixe conditions on the parameters of any class of f(R) functions so that GR and this class of theories will have exactly the same solutions. The well-known model R+α\b{eta}^{1-p}R^{p} for dark energy is presented as an illustration, as well as the FLRW metric where it's shown that there exists only one class of f(R) theories which has exactly the same GR scale factor.

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。

↑