Anisotropic Friedmann-Robertson-Walker universe from nonlinear massive gravity
Abstract
Motivated by the recent no-go result of homogeneous and isotropic solutions in the nonlinear massive gravity, we study fixed points of evolution equations for a Bianchi type-I universe. We find a new attractor solution with non-vanishing anisotropy, on which the physical metric is isotropic but the Stückelberg configuration is anisotropic. As a result, at the background level, the solution describes a homogeneous and isotropic universe, while a statistical anisotropy is expected from perturbations, suppressed by smallness of the graviton mass.
- Publication:
-
Physics Letters B
- Pub Date:
- October 2012
- DOI:
- 10.1016/j.physletb.2012.09.049
- arXiv:
- arXiv:1206.2723
- Bibcode:
- 2012PhLB..717..295G
- Keywords:
-
- High Energy Physics - Theory;
- Astrophysics - Cosmology and Extragalactic Astrophysics;
- General Relativity and Quantum Cosmology
- E-Print:
- 4 pages, 1 figure, REVTeX4