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arXiv · 1608.01764

Propagating degrees of freedom in f(R) gravity

Yun Soo Myung
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Abstract

We have computed the number of polarization modes of gravitational waves propagating in the Minkowski background in $f(R)$ gravity. This is three of two from transverse-traceless tensor modes and one from a massive trace mode, which confirms the results found in the literature. There is no massless breathing mode and the massive trace mode corresponds to the Ricci scalar. A newly defined metric tensor in $f(R)$ gravity satisfies the transverse-traceless (TT) condition as well as the TT wave equation.

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Yun Soo Myung. 2016-12-21. Propagating degrees of freedom in f(R) gravity. https://doi.org/10.1155/2016%2F3901734

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