Cosmological attractors in massive gravity

Details Cosmological attractors in massive gravity Cosmological attractors in massive gravity

2005-04-07

arxiv.org/abs/hep-th/0504067v1

Phys.Rev. D72 (2005) 084011

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, 1 figure

Scientific paper

10.1103/PhysRevD.72.084011

We study Lorentz-violating models of massive gravity which preserve rotations and are invariant under time-dependent shifts of the spatial coordinates. In the linear approximation the Newtonian potential in these models has an extra ``confining'' term proportional to the distance from the source. We argue that during cosmological expansion the Universe may be driven to an attractor point with larger symmetry which includes particular simultaneous dilatations of time and space coordinates. The confining term in the potential vanishes as one approaches the attractor. In the vicinity of the attractor the extra contribution is present in the Friedmann equation which, in a certain range of parameters, gives rise to the cosmic acceleration.

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