Extended Slow-Roll Conditions and Rapid-Roll Conditions

Details Extended Slow-Roll Conditions and Rapid-Roll Conditions Extended Slow-Roll Conditions and Rapid-Roll Conditions

2008-07-30

arxiv.org/abs/0807.4965v2

JCAP 0810:021,2008

Astronomy and Astrophysics

Astrophysics

15 pages, published version

Scientific paper

10.1088/1475-7516/2008/10/021

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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