Cosmic expansion histories in massive bigravity with symmetric matter coupling
arXiv:1409.2860 · doi:10.1088/1475-7516/2015/01/006
Abstract
We study the cosmic expansion history of massive bigravity with a viable matter coupling which treats both metrics on equal footing. We derive the Friedmann equation for the effective metric through which matter couples to the two metrics, and study its solutions. For certain parameter choices, the background cosmology is identical to that of LCDM. More general parameters yield dynamical dark energy, which can still be in agreement with observations of the expansion history. We study specific parameter choices of interest, including minimal models, maximally-symmetric models, and a candidate partially-massless theory.
23 pages, 2 figures, matches version published in JCAP
References in corpus (14)
- Resummation of Massive Gravity
- Accelerated expansion from ghost-free bigravity: a statistical analysis with improved generality
- On couplings to matter in massive (bi-)gravity
- Stable and unstable cosmological models in bimetric massive gravity
- Ghosts & Matter Couplings in Massive (bi-&multi-)Gravity
- Non-Renormalization and Naturalness in a Class of Scalar-Tensor Theories
- Viable cosmology in bimetric theory
- FRW Cosmological Perturbations in Massive Bigravity
- The coupling to matter in Massive, Bi- and Multi-Gravity
- Particular Solutions in Bimetric Theory and Their Implications
- Linear growth of structure in massive bigravity
- Dark matter in ghost-free bigravity theory: From a galaxy scale to the universe
- Absence of ghost in a new bimetric-matter coupling
- Bigravity in tetrad Hamiltonian formalism and matter couplings
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- Bimetric gravity is cosmologically viable
- Stable and unstable cosmological models in bimetric massive gravity
- Gravitational waves in bigravity cosmology
- Cosmology in bimetric theory with an effective composite coupling to matter
- Higuchi Ghosts and Gradient Instabilities in Bimetric Gravity
- Cosmology of bigravity with doubly coupled matter
- Cosmological perturbations in massive gravity with doubly coupled matter
- Integrated Sachs-Wolfe effect in massive bigravity
- Cosmological viability of massive gravity with generalized matter coupling
- Surfing gravitational waves: can bigravity survive growing tensor modes?
- A general theory of linear cosmological perturbations: bimetric theories
- Cosmological histories in bimetric gravity: A graphical approach
- On Consistent Kinetic and Derivative Interactions for Gravitons
- Homogeneous Instantons in Bigravity
- Cosmology of Massive Gravity and its Extensions
- Hamiltonian cosmology in bigravity and massive gravity