Quasidilaton nonlinear massive gravity: Investigations of background cosmological dynamics
Abstract
We investigate cosmological behavior in the quasidilaton nonlinear massive gravity. We perform a detailed dynamical analysis and examine the stable latetime solutions relevant to latetime cosmic acceleration. We demonstrate that a darkenergydominated, cosmologicalconstantlike solution is a late attractor of the dynamics. We also analyze the evolution of the universe at intermediate times, showing that the observed epoch sequence can be easily obtained in the model under consideration. Furthermore, we study the nonsingular bounce and the cosmological turnaround which can be realized for a region of the parameter space. Last but not least, we use observational data from type Ia supernovae, baryon acoustic oscillations and the cosmic microwave background in order to constrain the parameters of the theory.
 Publication:

Physical Review D
 Pub Date:
 June 2013
 DOI:
 10.1103/PhysRevD.87.123536
 arXiv:
 arXiv:1304.5095
 Bibcode:
 2013PhRvD..87l3536G
 Keywords:

 98.80.k;
 95.36.+x;
 04.50.Kd;
 Cosmology;
 Dark energy;
 Modified theories of gravity;
 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Extragalactic Astrophysics;
 High Energy Physics  Theory
 EPrint:
 13 pages, 8 figures, a minor comment on superluminality added, references added, to appear in PRD