1201.4546 (Chung-Chi Lee et al.)

Singularity phenomena in viable f(R) gravity    [PDF]

Chung-Chi Lee, Chao-Qiang Geng, Louis Yang

The curvature singularity in viable f(R) gravity models is examined when the
background density is dense. This singularity could be eliminated by adding the
$R^{2}$ term in the Lagrangian. Some of cosmological consequences, in
particular the source for the scalar mode of gravitational waves, are
discussed.

View original: http://arxiv.org/abs/1201.4546