NON-GAUSSIAN ISOCURVATURE PERTURBATIONS FROM INFLATION

Citation
A. Linde et V. Mukhanov, NON-GAUSSIAN ISOCURVATURE PERTURBATIONS FROM INFLATION, Physical review. D. Particles and fields, 56(2), 1997, pp. 535-539
Citations number
29
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
05562821
Volume
56
Issue
2
Year of publication
1997
Pages
535 - 539
Database
ISI
SICI code
0556-2821(1997)56:2<535:NIPFI>2.0.ZU;2-Z
Abstract
We present a class of very simple inflationary models of two scalar fi elds which leads to non-Gaussian isothermal perturbations with a ''blu e'' spectrum, n>1. One of the models is inspired by supersymmetric the ories where light scalar fields naturally acquire masses similar to H during inflation. Another model presumes that one of the fields has a nonminimal interaction with gravity xi R sigma(2). By a slight modific ation of parameters of these models one can obtain either Gaussian iso thermal perturbations, or non-Gaussian adiabatic perturbations with n> 1.