Non-Gaussian isocurvature perturbations from inflation
Abstract
We present a class of very simple inflationary models of two scalar fields which leads to non-Gaussian isothermal perturbations with a ``blue'' spectrum, n>1. One of the models is inspired by supersymmetric theories where light scalar fields naturally acquire masses ~H during inflation. Another model presumes that one of the fields has a nonminimal interaction with gravity ξRσ2. By a slight modification of parameters of these models one can obtain either Gaussian isothermal perturbations, or non-Gaussian adiabatic perturbations with n>1.
- Publication:
-
Physical Review D
- Pub Date:
- July 1997
- DOI:
- arXiv:
- arXiv:astro-ph/9610219
- Bibcode:
- 1997PhRvD..56..535L
- Keywords:
-
- 98.80.Cq;
- 12.60.Jv;
- Particle-theory and field-theory models of the early Universe;
- Supersymmetric models;
- Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory
- E-Print:
- Few misprints are corrected