Spectrum of Curvature Perturbation of Multi-field Inflation with Small-Field Potential

Details Spectrum of Curvature Perturbation of Multi-field Inflation with Small-Field Potential Spectrum of Curvature Perturbation of Multi-field Inflation with Small-Field Potential

2008-01-21

arxiv.org/abs/0801.3129v1

JCAP 0802:002,2008

Astronomy and Astrophysics

Astrophysics

8 pages, no figure, to publish in JCAP

Scientific paper

10.1088/1475-7516/2008/02/002

In this paper, we have studied the spectrum of curvature perturbation of multi-field inflation with general small-field potential. We assume that the isocurvature perturbation may be neglected, and by using the Sasaki-Stewart formalism, we found that the spectrum may be redder or bluer than of its corresponding single field. The result depends upon the values of fields and their effective masses at the horizon-crossing time. We discuss the relevant cases.

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