Cosmology in bimetric theory with an effective composite coupling to matter
arXiv:1501.02790 · doi:10.1088/1475-7516/2015/04/008
Abstract
We study the cosmology of bimetric theory with a composite matter coupling. We find two possible branches of background evolution. We investigate the question of stability of cosmological perturbations. For the tensor and vector perturbations, we derive conditions on the absence of ghost and gradient instabilities. For the scalar modes, we obtain conditions for avoiding ghost degrees. In the first branch, we find that one of the scalar modes becomes a ghost at the late stages of the evolution. Conversely, this problem can be avoided in the second branch. However, we also find that the constraint for the second branch prevents the doubly coupled matter fields from being the standard ingredients of cosmology. We thus conclude that a realistic and stable cosmological model requires additional minimally coupled matter fields.
22 pages
References in corpus (29)
- Resummation of Massive Gravity
- Massive gravity: nonlinear instability of the homogeneous and isotropic universe
- Multi-field galileons and higher co-dimension branes
- Cosmic Acceleration and the Helicity-0 Graviton
- Accelerated expansion from ghost-free bigravity: a statistical analysis with improved generality
- On couplings to matter in massive (bi-)gravity
- Quasi-Dilaton: Theory and Cosmology
- 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
- Self-accelerating Massive Gravity: Exact solutions for any isotropic matter distribution
- Anisotropic Friedmann-Robertson-Walker universe from nonlinear massive gravity
- Viable cosmology in bimetric theory
- Cosmological perturbations in massive bigravity
- Gravitational waves in bigravity cosmology
- Cosmology of the proxy theory to massive gravity
- FRW Cosmological Perturbations in Massive Bigravity
- The coupling to matter in Massive, Bi- and Multi-Gravity
- Cosmic expansion histories in massive bigravity with symmetric matter coupling
- Appearance of Boulware-Deser ghost in bigravity with doubly coupled matter
- Linear growth of structure in massive bigravity
- Cosmology of bigravity with doubly coupled matter
- Cosmological perturbations in massive gravity with doubly coupled matter
- Mass eigenstates in bimetric theory with matter coupling
- Integrated Sachs-Wolfe effect in massive bigravity
- A new quasidilaton theory of massive gravity
- Quantum Corrections in Galileons from Matter Loops
- Self-accelerating Massive Gravity: Covariant Perturbation Theory
- Bigravity in tetrad Hamiltonian formalism and matter couplings
Cited by in corpus (8)
- Bimetric gravity is cosmologically viable
- Gravitational waves in bigravity cosmology
- Higuchi Ghosts and Gradient Instabilities in Bimetric Gravity
- Cosmological gravitational particle production of massive spin-2 particles
- Surfing gravitational waves: can bigravity survive growing tensor modes?
- Cosmological histories in bimetric gravity: A graphical approach
- Cosmology of Massive Gravity and its Extensions
- Hamiltonian cosmology in bigravity and massive gravity