We present a class of very simple inflationary models of two scalar fields which leads to non-Gaussian isothermal perturbations with a “blue” spectrum, $n>\mathrm{}1.\mathrm{}$ One of the models is inspired by supersymmetric theories where light scalar fields naturally acquire masses $\sim H$ during inflation. Another model presumes that one of the fields has a nonminimal interaction with gravity $\xi R{\sigma }^2.$ By a slight modification of parameters of these models one can obtain either Gaussian isothermal perturbations, or non-Gaussian adiabatic perturbations with $n>\mathrm{}1.\mathrm{}$

• Received 28 October 1996

DOI:https://doi.org/10.1103/PhysRevD.56.R535