A New Approach to the Analysis of Cosmological Parameters in Multifield Cosmology

TL;DR

This paper introduces a novel analytical algorithm for calculating cosmological parameters in multifield inflation models, addressing a gap in existing methods for tensor-multi-scalar theories of gravity.

Contribution

The paper presents a new effective algorithm that uses analytical solutions to determine cosmological parameters in multifield inflationary models.

Findings

The algorithm successfully computes cosmological parameters in tensor-multi-scalar theories.

The method allows comparison of theoretical predictions with observational data.

It extends single-field inflation analysis techniques to multifield scenarios.

Abstract

Currently, a method has been developed for the cosmological inflation model with a single scalar field to calculate cosmological parameters such as the power spectrum of scalar and tensor perturbations, their spectral indices, and the tensor-to-scalar ratio. However, for a multifield configuration, a definitive method for calculating cosmological parameters has not yet been established. We propose a new effective algorithm for determining cosmological parameters within the tensor-multi-scalar theory of gravity, which describes the early inflationary epoch of the Universe. Our approach is based on utilizing a specific analytical solution within a multifield cosmological model to establish functional relationships between fields. This method enables the computation of cosmological parameters and their comparison with observational data.