Extended Slow-Roll Conditions and Primordial Fluctuations: Multiple Scalar Fields and Generalized Gravity

Abstract

As an extension of our previous study, we derive slow-roll conditions for multiple scalar fields which are non-minimally coupled with gravity and for generalized gravity theories of the form $f(\varphi ,R)$. We provide simple formulae of the spectral indices of scalar/tensor perturbations in terms of the slow-roll parameters.

15 pages, to appear in JCAP

References in corpus (3)

• Primordial Non-Gaussianity in Multi-Scalar Slow-Roll Inflation
• Extended Slow-Roll Conditions and Rapid-Roll Conditions
• Density fluctuations in one-field inflation

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