Cosmological scenarios from multiquintessence

TL;DR

This paper explores cosmological models derived from multi-component scalar fields, analyzing various combinations of sine-Gordon, Z2, and BNRT models, including symmetry-breaking modifications, with all results obtained analytically.

Contribution

It introduces a framework for constructing multi-field cosmological scenarios combining different scalar field models, including symmetry-breaking variants, extendable to N fields.

Findings

Analytical solutions for multi-field scalar cosmologies.

Parameter restrictions for realistic scenarios.

Extension to N-field models.

Abstract

In this work we derive and analyse cosmological scenarios coming from multi-component scalar field models. We consider a direct sum of a sine-Gordon with a Z2 model, and also a combination of those with a BNRT model. Moreover, we work with a modified version of the BNRT model, which breaks the Z2 x Z2 symmetry of the original BNRT potential, coupled with the sine-Gordon and with the standard Z2 models. We show that our approach can be straightforwardly elevated to $N$ fields. All the computations are made analytically and some parameters restriction is put forward in order to get in touch with complete and realistic cosmological scenarios.