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arxiv: 0807.4965 · v2 · pith:LCJKZN5Inew · submitted 2008-07-30 · 🌌 astro-ph · gr-qc· hep-ph· hep-th

Extended Slow-Roll Conditions and Rapid-Roll Conditions

classification 🌌 astro-ph gr-qchep-phhep-th
keywords conditionsslow-rollrapid-rollscalarapproximationsconformalconsistentcoupled
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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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