Density Perturbations in Multifield Inflationary Models

V. F. Mukhanov; Paul J. Steinhardt

doi:10.1016/s0370-2693(98)00032-x

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arXiv · astro-ph/9710038

Density Perturbations in Multifield Inflationary Models

V. F. Mukhanov·Paul J. Steinhardt

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Abstract

We derive a closed-form, analytical expression for the spectrum of long-wavelength density perturbations in inflationary models with two (or more) inflaton degrees of freedom that is valid in the slow-roll approximation. We illustrate several classes of potentials for which this expression reduces to a simple, algebraic expression.

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V. F. Mukhanov, Paul J. Steinhardt. 1997-10-03. Density Perturbations in Multifield Inflationary Models. https://doi.org/10.1016/s0370-2693(98)00032-x

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