We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Stable FLRW solutions in generalized massive gravity.
- Authors
de Rham, Claudia; Fasiello, Matteo; Tolley, Andrew J.
- Abstract
We present exact Friedmann Lemaítre Robertson Walkers (FLRW) solutions in generalized massive gravity where the mass parameters are naturally promoted to Lorentz-invariant functions of the Stückelberg fields. This new dependence relaxes the constraint that would otherwise prevent massive gravity from possessing exact FLRW solutions. It does so without the need to introduce additional degrees of freedom. We find self-accelerating cosmological solutions and show that, with a mild restriction on the region of phase space, these cosmological solutions exhibit full stability, i.e. absence of ghosts and gradient instabilities for all the tensor, vector and scalar modes, for all cosmic time. We perform the full decoupling limit analysis, including vector degrees of freedom, which can be used to confirm the existence of an active Vainshtein mechanism about these solutions.
- Subjects
GRAVITY; FRIEDMANN equations; HUBBLE'S law; ACCELERATION (Mechanics); DARK energy
- Publication
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology, 2014, Vol 23, Issue 13, p-1
- ISSN
0218-2718
- Publication type
Article
- DOI
10.1142/S0218271814430068