Inflation and dark energy from f(R) gravity

الأصل · EN

Inflationary paradigm has several issues, such as the pre-inflationary horizon problem or the eternal inflation. To avoid that the standard Starobinsky inflation has been extended to R + αRⁿ and R + αRⁿ -δR²⁻ⁿ models as well as Brans-Dicke generalisation of those f(R) models. The region of the parameter space, which provides consistency with PLANCK data and lack of eternal inflation has been founded. The Einstein frame potential has a stable minimum with non-zero vacuum energy, which may be a source of dark energy.