Regular Article - Theoretical Physics
Unified dark energy from Chiral-Quintom model with a mixed potential in Friedmann–Lemaître–Robertson–Walker cosmology
Institute of Systems Science, Durban University of Technology, 4000, Durban, Republic of South Africa
2 Departamento de Matemáticas, Universidad Católica del Norte, Avda. Angamos 0610, 1280, Casilla, Antofagasta, Chile
Accepted: 20 August 2023
Published online: 29 August 2023
For a spatially Friedmann–Lemaître–Robertson–Walker cosmology, we propose a multi-scalar field gravitational model. Specifically, we consider a two-scalar field cosmological model in which the kinetic components of the scalar fields establish a two-dimensional sphere of Lorentzian signature. For our Chiral-Quintom model we choose a mixed potential term and we investigate the asymptotic limits of the cosmological parameters. This model for , provides a generalization of the hyperbolic inflation where the equation of the state parameter can cross the phantom divide line. When we observe that this cosmological model exhibits asymptotic solutions that encompass accelerated universes, big rip singularities, and dust-like solutions. Hence, this multi-scalar field model it can be regarded as as a dark energy unify model which describes a variety of asymptotic cosmological scenarios.
© The Author(s) 2023
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