Generation of perturbation after multi-field inflation

2007/06/30 by Jinn-Ouk Gong
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1016/j.physletb.2007.10.024

published as Phys.Lett.B657:165-169,2007 · 8 pages, 1 figure; (v2) 9 pages, discussions expanded, to appear in Physics Letters B

arxiv created 2007/10/18 · openalex publication_date 2007/10/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

We explore a new possibility that some inflaton fields in multi-field inflation models satisfy the observed value of the spectral index so that the curvature perturbation generated by them through post-inflationary dynamics may be relevant for the current observations. We illustrate this point using a simple and reasonable multi-field chaotic inflation model motivated from string theory. Possible non-Gaussianity and the tensor-to-scalar ratio are briefly addressed.

Citations

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