No-go theorem for inflation in Ricci-inverse gravity
Tuan Q. Do
Abstract
Abstract In this paper, we study the so-called Ricci-inverse gravity, which is a very novel type of fourth-order gravity proposed recently. In particular, we are able to figure out both isotropically and anisotropically inflating universes to this model. More interestingly, these solutions are shown to be free from a singularity problem. However, stability analysis based on the dynamical system method shows that both isotropic and anisotropic inflation of this model turn out to be unstable against field perturbations. This result implies a no-go theorem for both isotropic and anisotropic inflation in the Ricci-inverse gravity.
Topics & Concepts
Inflation (cosmology)IsotropySingularityPhysicsStability (learning theory)AnisotropyClassical mechanicsField (mathematics)Type (biology)Mathematical analysisDynamical system (definition)Theoretical physicsMathematicsMathematical physicsCosmology and Gravitation TheoriesNoncommutative and Quantum Gravity TheoriesGeophysics and Gravity Measurements