https://doi.org/10.1140/epjc/s10052-023-11259-7
Regular Article - Theoretical Physics
Dynamics of interacting scalar field model in the realm of chiral cosmology
1
Department of Physics, IISER Bhopal, 462066, Bhopal, India
2
Inter University Centre for Astronomy and Astrophysics, Post Bag 4, 411007, Pune, India
3
NAS, Centre for Theoretical Physics and Natural Philosophy, Mahidol University, Nakhonsawan Campus, 60130, Nakhonsawan, Thailand
4
Department of Physics, Indian Institute of Technology, Bombay, 400076, Mumbai, India
Received:
14
September
2022
Accepted:
24
January
2023
Published online:
10
February
2023
The strange behaviour of the universe’s dark sector offers us the flexibility to address cosmological problems with different approaches. Using this flexibility, we consider a possible exchange of energy among the dark sector components as a viable candidate model. In the present work, we investigate the interaction between two scalar fields within the generalization of a two-component chiral cosmology. We also show that there exists a unique equivalence between fields and fluids description of interacting dark sector model. Later, a detailed analysis of the dynamics of the dark energy-dark matter model with coupling in both kinetic and potential parts has been performed using a method of qualitative analysis of dynamical systems. Moreover, the cosmological viability of this model is analyzed for the potential of an exponential form via the phase-space study of autonomous system for various cosmological parameters.
© The Author(s) 2023
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