Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-04-18
Phys.Lett. B381 (1996) 413-419
Astronomy and Astrophysics
Astrophysics
12 pages, elsart, no figures
Scientific paper
10.1016/0370-2693(96)00594-1
We derive general analytic formulae for the power spectrum and spectral index of the curvature perturbation produced during inflation driven by a multi-component inflaton field, up to the second order in the slow-roll approximation. We do not assume any specific properties of the potential or the metric on the scalar field space, except for the slow-roll condition, Einstein gravity, and the absence of any permanent isocurvature modes.
Nakamura Takahiro T.
Stewart Ewan D.
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