Hamiltonian cosmology in bigravity and massive gravity
arXiv:1505.00840
Abstract
In the Hamiltonian language we provide a study of flat-space cosmology in bigravity and massive gravity constructed mostly with de Rham, Gabadadze, Tolley (dRGT) potential. It is demonstrated that the Hamiltonian methods are powerful not only in proving the absence of the Boulware-Deser ghost, but also in solving other problems. The purpose of this work is to give an introduction both to the Hamiltonian formalism and to the cosmology of bigravity. We sketch three roads to the Hamiltonian of bigravity with the dRGT potential: the metric, the tetrad and the minisuperspace approaches.
42 pages, no figures, some typos removed
References in corpus (11)
- Resummation of Massive Gravity
- Accelerated expansion from ghost-free bigravity: a statistical analysis with improved generality
- Bimetric gravity is cosmologically viable
- On couplings to matter in massive (bi-)gravity
- The coupling to matter in Massive, Bi- and Multi-Gravity
- Cosmic expansion histories in massive bigravity with symmetric matter coupling
- Cosmology in bimetric theory with an effective composite coupling to matter
- Dark Matter via Massive (bi-)Gravity
- Cosmology of bigravity with doubly coupled matter
- Covariant constraints for generic massive gravity and analysis of its characteristics
- Bigravity in tetrad Hamiltonian formalism and matter couplings