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.

arXiv comment15 pages, 6 figures, revised version

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