Abstract
We study a previously largely unexplored branch of homogeneous and isotropic background solutions in ghost-free massive bigravity with consistent double matter coupling. For a certain family of parameters we find `self-inflated' FLRW cosmologies, i.e. solutions with an accelerated early-time period during the radiation-dominated era. In addition, these solutions also display an accelerated late-time period closely mimicking GR with a cosmological constant. Interestingly, within this family, the particular case of β1=β3=0 gives bouncing cosmologies, where there is an infinite contracting past, a non-zero minimum value of the scale factor at the bounce, and an infinite expanding future.
Original language | English |
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Article number | 023 |
Pages (from-to) | 1-31 |
Number of pages | 31 |
Journal | Journal of Cosmology and Astroparticle Physics |
Volume | 2016 |
Issue number | 1 |
DOIs | |
Publication status | Published - 14 Jan 2016 |