http://arxiv.org/abs/1711.10472
We consider a modified gravity model with a massive graviton, but which nevertheless only propagates two gravitational degrees of freedom and which is free of ghosts. We show that non-singular bouncing cosmological background solutions can be generated. In addition, the mass term for the graviton prevents anisotropies from blowing up in the contracting phase and also suppresses the spectrum of gravitational waves compared to that of the scalar cosmological perturbations. This addresses two of the main problems of the matter bounce scenario.
C. Lin, J. Quintin and R. Brandenberger
Wed, 29 Nov 17
37/69
Comments: 20 pages, 2 figures
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