On Perturbation Spectra of N-flation

Abstract

In this note we study the adiabatic perturbation spectrum of N-flation with power law potential. We show that the scalar spectrum of N-flation is generally redder than that of its corresponding single field. The result obtained for that with unequal massive fields is consistent with the recent numerical investigation of Kim and Liddle.

3 pages, refs. added, comments added, typos corrected, abstract changed, to publish in PRD brief report

References in corpus (2)

• Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data
• Nflation: multi-field inflationary dynamics and perturbations

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