https://doi.org/10.1140/epjp/s13360-024-04912-x
Regular Article
Kaluza–Klein spacetime filled with barotropic fluid and dark energy
1
Department of Mathematics, Dayananda Sagar College of Engineering, 560078, Bangalore, India
2
Department of Mathematics, Graphic Era Hill University, 263136, Bhimtal, India
a
sanjay-maths@dayanandasagar.edu
Received:
17
August
2023
Accepted:
17
January
2024
Published online:
6
February
2024
In this paper, we study a two-fluid cosmological model in five-dimensional Kaluza–Klein spacetime. For the two-fluid model, one fluid corresponds to model the barotropic fluid and another fluid represents the dark energy of the universe. Einstein’s field equations have been solved with the interacting as well as the non-interacting two-fluid scenario. The physical consequences concerning the dark energy parameter for the interacting and non-interacting two-fluid scenario are compared in view of current observation results. The cosmological models presented in the article are best described by quintessence dark energy cosmological models of the universe. The total density parameter(Ω) value remains the same; either two fluids are interacting or non-interacting. Our models are consistent with the current lambda-CDM model of the universe and show that q → − 1 and j(t) → 1 for large n value.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.