COT4 - Nonsingular Cosmology - Inflation |
Speaker_ |
Chervon, Sergey |
Talk _ |
Chiral Cosmological Models and Exact Inflation |
Abstract _ |
A chiral cosmological model is considered as a generalization to standard and multi-field inflation. Besides, it can be used for description of cosmic multi-component fluid and fluid with viscosity, when constraint equations are imposed on the chiral fields. Exact solutions for chiral and standard inflationary models are compared, and they are considered as a basis for exact inflation. The evolution of the cosmological perturbations and their affect to the large-scale structure formation are analyzed as well. The important theoretically predicted quantities, such as the curvature perturbations, their spectrum and spectral index, are obtained in the explicit form, which defers from the slow-roll approximation results. Possible variations of the inflationary parameters are discussed. |