Nongaussian Isocurvature Perturbations from Inflation

Details Nongaussian Isocurvature Perturbations from Inflation Nongaussian Isocurvature Perturbations from Inflation

1996-10-26

arxiv.org/abs/astro-ph/9610219v2

Phys.Rev.D56:535-539,1997

Astronomy and Astrophysics

Astrophysics

Few misprints are corrected; results are not changed. It is noted that our results for the most natural range of parameters co

Scientific paper

10.1103/PhysRevD.56.R535

We present a class of very simple inflationary models of two scalar fields which leads to nongaussian isothermal perturbations with "blue" spectrum, n > 1. One of the models is inspired by supersymmetric theories where light scalar fields naturally acquire masses of the order of the Hubble constant H during inflation. Another model presumes that one of the fields has a nonminimal interaction with gravity. By a slight modification of parameters of these models one can obtain either gaussian isothermal perturbations, or nongaussian adiabatic perturbations with n > 1.

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