A New Approach to the Analysis of Cosmological Parameters in Multifield Cosmology
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.
Keywords
Cite
@article{arxiv.2501.01948,
title = {A New Approach to the Analysis of Cosmological Parameters in Multifield Cosmology},
author = {Katerina Bolshakova and Sergey Chervon},
journal= {arXiv preprint arXiv:2501.01948},
year = {2025}
}
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12 pages