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arXiv 1001.0847gr-qcastro-ph.COhep-th
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f(R)-引力的后Minkowski极限

The post-Minkowskian limit of f(R)-gravity

S. Capozziello, A. Stabile, A. Troisi

摘要:

本文在不采用保角变换的情况下,将所有的计算都在原Jordan框架下展开,正式讨论了$f(R)$ -引力的后闵可夫斯基极限。结果表明,这样的方法产生,在一般情况下,与标准的无质量引力子,大规模的标量模式,其质量是直接相关的理论的分析参数。在这个意义上,只有无质量引力子的存在才是广义相对论的一个独特特征。这一事实从未得到足够的强调,并可能在引力波的探测中产生戏剧性的后果。最后讨论了$f(R)$ -引力的曲率应力-能量张量的作用,表明它推广了广义相对论的Landau-Lifshitz张量。产生质量模的更进一步的自由度与这样一个张量的结构直接相关。

英文摘要:

We formally discuss the post-Minkowskian limit of $f(R)$-gravity without adopting conformal transformations but developing all the calculations in the original Jordan frame. It is shown that such an approach gives rise, in general, together with the standard massless graviton, to massive scalar modes whose masses are directly related to the analytic parameters of the theory. In this sense, the presence of massless gravitons only is a peculiar feature of General Relativity. This fact is never stressed enough and could have dramatic consequences in detection of gravitational waves. Finally the role of curvature stress-energy tensor of $f(R)$-gravity is discussed showing that it generalizes the so called Landau-Lifshitz tensor of General Relativity. The further degrees of freedom, giving rise to the massive modes, are directly related to the structure of such a tensor.

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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