Bimetric gravity is cosmologically viable

@article{Akrami2015BimetricGI,
  title={Bimetric gravity is cosmologically viable},
  author={Yashar Akrami and Sara F. Hassan and Frank Konnig and Angnis Schmidt-May and Adam R. Solomon},
  journal={Physics Letters B},
  year={2015},
  volume={748},
  pages={37-44}
}

Tables from this paper

Cosmology of Massive Gravity and its Extensions

We review the status of the theory of dRGT massive gravity, and some of its extensions, as applied to cosmology and the cosmological constant problem.

Bimetric cosmology is compatible with local tests of gravity

Recently, Kenna-Allison et al claimed that bimetric gravity cannot give rise to a viable cosmological expansion history while at the same time being compatible with local gravity tests. In this note

A general theory of linear cosmological perturbations: bimetric theories

We implement the method developed in [1] to construct the most general parametrised action for linear cosmological perturbations of bimetric theories of gravity. Specifically, we consider

Ghosts in extended quasidilaton theories

We report on our independent investigations of the puzzle of cosmological perturbations in extended quasidilaton. We confirm the claims of presence of the Boulware-Deser ghost. We use both the

Analytical constraints on bimetric gravity

Ghost-free bimetric gravity is an extension of general relativity, featuring a massive spin-2 field coupled to gravity. We parameterize the theory with a set of observables having specific physical

On the stability of bimetric structure formation

Bimetric gravity can reproduce the accelerated expansion of the Universe, without a cosmological constant. However, the stability of these solutions to linear perturbations has been questioned,

Combining cosmological and local bounds on bimetric theory

Ghost-free bimetric theory describes two nonlinearly interacting spin-2 fields, one massive and one massless, thus extending general relativity. We confront bimetric theory with observations of

Constraints on bimetric gravity. Part I. Analytical constraints

Ghost-free bimetric gravity is an extension of general relativity, featuring a massive spin-2 field coupled to gravity. We parameterize the theory with a set of observables having specific physical

Strings, Gravitons, and Effective Field Theories

This thesis concerns a range of aspects of theoretical physics. It is composed of two parts. In the first part we motivate our line of research, and introduce and discuss the relevant concepts. In ...
...

References

SHOWING 1-10 OF 99 REFERENCES

Cosmological Solutions in Bimetric Gravity and their Observational Tests

We obtain the general cosmological evolution equations for a classically consistent theory of bimetric gravity. Their analytic solutions are demonstrated to generically allow for a cosmic evolution

Growth histories in bimetric massive gravity

We perform cosmological perturbation theory in Hassan-Rosen bimetric gravity for general homogeneous and isotropic backgrounds. In the de Sitter approximation, we obtain decoupled sets of massless ...

Bimetric gravity doubly coupled to matter: theory and cosmological implications

A ghost-free theory of gravity with two dynamical metrics both coupled to matter is shown to be consistent and viable. Its cosmological implications are studied, and the models, in particular in the

To the problem of nonvanishing gravitation mass

Growth histories in bimetric massive gravity

We perform cosmological perturbation theory in Hassan-Rosen bimetric gravity for general homogeneous and isotropic backgrounds. In the de Sitter approximation, we obtain decoupled sets of massless

Cosmological perturbations in massive gravity with doubly coupled matter

We investigate the cosmological perturbations around FLRW solutions to non- linear massive gravity with a new effective coupling to matter proposed recently. Unlike the case with minimal matter

Note on ghost-free matter couplings in massive gravity and multigravity

We consider a recently proposed non-minimal matter coupling in massive gravity and multi-gravity. We argue that, when formulated in terms of unconstrained vielbeins, this matter coupling contains the

Viable cosmology in bimetric theory

We study cosmological perturbations in bimetric theory with two fluids each of which is coupled to one of the two metrics. Focusing on a healthy branch of background solutions, we clarify the

Viable cosmological solutions in massive bimetric gravity

We find the general conditions for viable cosmological solution at the background level in bigravity models. Furthermore, we constrain the parameters by comparing to the Union 2.1 supernovae catalog

Resummation of massive gravity.

TLDR
Four-dimensional covariant nonlinear theories of massive gravity are constructed which are ghost-free in the decoupling limit to all orders, and the Hamiltonian constraint is maintained at least up to and including quartic order in nonlinearities, hence excluding the possibility of the Boulware-Deser ghost up to this order.
...