Extended slow-roll conditions and rapid-roll conditions

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Published 14 October 2008 IOP Publishing Ltd
, , Citation Takeshi Chiba and Masahide Yamaguchi JCAP10(2008)021 DOI 10.1088/1475-7516/2008/10/021

1475-7516/2008/10/021

Abstract

We derive slow-roll conditions for a scalar field which is non-minimally coupled with gravity in a consistent manner and express spectral indices of scalar/tensor perturbations in terms of the slow-roll parameters. The conformal invariance of the curvature perturbation is proved without linear approximations. Rapid-roll conditions are also derived, and the relation with the slow-roll conditions is discussed.

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10.1088/1475-7516/2008/10/021