Cosmology of non-local f(R) gravity
arXiv:1509.04254
Abstract
We consider a modification of GR with a special type of a non-local f(R). The structure of the non-local operators is motivated by the string field theory and p-adic string theory. The spectrum is derived explicitly and the ghost-free condition for the model is formulated. We pay special attention to the classical stability of the de Sitter solution in our model and formulate the conditions on the model parameters to have a stable configuration. Relevance of unstable configurations for the description of the de Sitter phase during inflation is specifically discussed.
16 pages; new version matches the published one and contains substantial improvements in the discussion of the physics of the new model
References in corpus (8)
- Black holes in an ultraviolet complete quantum gravity
- Occurrence of exact inflation in non-local UV-complete gravity
- Phantom and non-phantom dark energy: The cosmological relevance of non-locally corrected gravity
- Consistent Higher Derivative Gravitational theories with stable de Sitter and Anti-de Sitter Backgrounds
- Stable analytic bounce in non-local Einstein-Gauss-Bonnet cosmology
- Nonlocal theories of gravity: the flat space propagator
- On Nonlocal Modified Gravity and its Cosmological Solutions
- Cosmological solutions in modified gravity with monomial nonlocality