paper

nonlinear massive theories of gravity and their cosmological implications

arXiv:1307.7150 · doi:10.1103/PhysRevD.90.064051

Abstract

We propose a nonlinear massive gravitational theory which includes modifications. This construction inherits the benefits of the de Rham-Gabadadze-Tolley model and is free of the Boulware-Deser ghost due to the existence of a Hamiltonian constraint accompanied by a nontrivial secondary one. The scalar perturbations in a cosmological background can be stabilized at the linear level for a wide class of the models. The linear scalar mode arisen from the sector can absorb the nonlinear longitudinal graviton, and hence, our scenario demonstrates the possibility of a gravitational Goldstone theorem. Finally, due to the combined contribution of the and graviton-mass sectors, the proposed theory allows for a large class of cosmological evolutions, such as the simultaneous and unified description of inflation and late-time acceleration.

6 pages, 1 figure, version published in Phys. Rev. D

References in corpus (18)

Cited by in corpus (23)