Generation of perturbation after multi-field inflation

Details Generation of perturbation after multi-field inflation Generation of perturbation after multi-field inflation

2007-06-25

arxiv.org/abs/0706.3599v2

Phys.Lett.B657:165-169,2007

Astronomy and Astrophysics

Astrophysics

8 pages, 1 figure; (v2) 9 pages, discussions expanded, to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2007.10.024

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.

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