Two scalar field cosmology from coupled one-field models

Abstract

One possible description for the current accelerated expansion of the universe is quintessence dynamics. The basic idea of quintessence consists of analyzing cosmological scenarios driven by scalar fields. In this work we present some interesting features on the cosmological scenario obtained from the solutions of an effective two scalar field model in a flat space-time. This effective model was constructed by coupling two single scalar field systems in a nontrivial way via an extension method. The solutions related to the fields allowed us to compute analytical cosmological parameters. The behavior of these parameters are highlighted, as well as the different epochs obtained from them.

arXiv comment8 pages, 6 figures

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• $f(R,T)=f(R)+\lambda T$ gravity models as alternatives to cosmic acceleration
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• Cosmological Solutions in Multiscalar Field Theory
• $2+1$ Einstein-Klein-Gordon black holes by gravitational decoupling
• Building analytical three-field cosmological models
• General solutions to $\mathcal{N}$-field cosmology with exponential potentials
• Cosmic Acceleration from Varying Masses in Five Dimensions
• Cosmological scenarios from multiquintessence
• Variational symmetries and superintegrability in multifield cosmology
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• Extended multi-scalar field theories in (1+1) dimensions
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