Realization of blue spectrum in generalized Galileon super-inflation models

Abstract

In the spirit of Galileon inflation and by considering some sorts of non-canonical kinetic terms in the action, we realize a stage of super-inflation leading to a blue-tilted tensor perturbation. We show also that addition of Galileon-like term to the action leads to avoidance of ghost instabilities in this setup.

15 pages, 6 figures, revised version

References in corpus (5)

• G-inflation: inflation driven by the Galileon field
• Galileon inflation
• Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity
• Higgs G-inflation
• Primordial non-Gaussianities in general modified gravitational models of inflation

Cited by in corpus (2)

• Gravitational waves in a cyclic Universe: resilience through cycles and vacuum state
• Beyond $f(\varphi )\mathcal{G}$: Gauss--Bonnet inflation with $\mu (\varphi ,X)$