Singularity phenomena in viable f(R) gravity
arXiv:1201.4546 · doi:10.1143/PTP.128.415
Abstract
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.
17 pages, 7 figures, version accepted by Progress of Theoretical Physics