Generalization of cosmological attractor approach to Einstein–Gauss–Bonnet gravity
Ekaterina O. Pozdeeva
Abstract
Abstract We construct models with the Gauss–Bonnet term multiplied by a function of the scalar field leading to an inflationary scenario. The consideration is related to the slow-roll approximation. The cosmological attractor approach gives the spectral index of scalar perturbations which is in a good agreement with modern observation and allows for variability of the tensor-to-scalar ratio. We reconstruct models with variability of parameters, which allows one to reproduce cosmological attractor predictions for inflationary parameters in an approximation of the leading order of 1/ N in Einstein–Gauss–Bonnet gravity.
Topics & Concepts
AttractorPhysicsScalar (mathematics)GeneralizationScalar fieldTerm (time)Inflation (cosmology)Cosmological modelTheoretical physicsFunction (biology)Statistical physicsCosmologySpectral indexClassical mechanicsMathematical physicsGravitationRössler attractorField (mathematics)Order (exchange)Cosmology and Gravitation TheoriesGalaxies: Formation, Evolution, PhenomenaBlack Holes and Theoretical Physics