Modulated inflation from kinetic term

Details Modulated inflation from kinetic term Modulated inflation from kinetic term

2008-04-21

arxiv.org/abs/0804.3268v3

JCAP0805:022,2008

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 1 figure, Accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2008/05/022

We study modulated inflation from kinetic term. Using the Mukhanov-Sasaki variable, it is possible to determine how mixing induced by the kinetic term feeds the curvature perturbation with the isocurvature perturbation. We show explicitly that the analytic result obtained from the evolution of the Mukhanov-Sasaki variable is consistent with the $\delta N$-formula. From our results, we find analytic conditions for the modulated fluctuation and the non-Gaussianity parameter.

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