Aspects of non-interacting and interacting universe: a complete scenario

The evolution of the dark energy within the scope of a spatially homogeneous and isotropic Friedmann-Robertson-Walker model filled with barotropic fluid and dark energy is examined. We have considered the two cases of an interacting and non-interacting two-fluid (barotropic and dark energy) scenario...

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Bibliographic Details
Published inCanadian journal of physics Vol. 101; no. 2; pp. 88 - 100
Main Authors Raushan, Rakesh, Shukla, A.K, Chaubey, R
Format Journal Article
LanguageEnglish
Published Ottawa NRC Research Press 01.02.2023
Canadian Science Publishing NRC Research Press
Subjects
Dark energy
Density
Equations of state
Evolution
Exact solutions
Mathematical models
Physics
Quadratures
Universe
Iran
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Summary:The evolution of the dark energy within the scope of a spatially homogeneous and isotropic Friedmann-Robertson-Walker model filled with barotropic fluid and dark energy is examined. We have considered the two cases of an interacting and non-interacting two-fluid (barotropic and dark energy) scenario and obtained the exact solutions to the corresponding field equations. In an interacting model, we have considered linear as well as quadratic interaction between dark sectors of the universe. We have also given the quadrature form for general interaction coupling parameter via Q = [alpha] [[rho].sub.m.sup.n], n [greater than or equal to] 1 and discussed the evolution of energy densities and effective equation of state with cosmic time for flat, closed, and open universes. It is also examined that the matter energy density is dominated in early phase of the universe, whereas the dark energy density is dominated in later phase of the universe for both scenarios, which is in concurrence with current observations.
ISSN:0008-4204
1208-6045
DOI:10.1139/cjp-2021-0417