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Extended Slow-Roll Conditions and Rapid-Roll Conditions (0807.4965v2)
Published 30 Jul 2008 in gr-qc, hep-ph, and hep-th
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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