https://doi.org/10.1140/epjc/s10052-024-13150-5
Regular Article - Theoretical Physics
Modelling the accelerating universe with f(Q) gravity: observational consistency
1
Department of Mathematics, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, 500078, Hyderabad, India
2
Department of Mathematics, S.P.M. Science and Gilani Arts, Commerce College, Ghatanji, 445301, Yavatmal, Maharashtra, India
3
Department of Mathematics, St. Anthony’s College, 793001, Shillong, Meghalaya, India
4
Mathematics Division, Department of Basic Sciences and Social Sciences, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
5
Inter-University Centre for Astronomy and Astrophysics, 411007, Pune, India
c
bivu@hyderabad.bits-pilani.ac.in
Received:
28
May
2024
Accepted:
21
July
2024
Published online:
4
August
2024
In this paper, we present a cosmological model within the framework of symmetric teleparallel gravity, focusing on f(Q) gravity, where Q represents the non-metricity scalar. Utilizing cosmological datasets, we derive an accelerating cosmological model by constraining its free parameters. To achieve this, we determine the parametric form of the Hubble parameter using a well-motivated f(Q) function. Remarkably, all obtained values fall within the range suggested by cosmological observations. By employing the best-fit parameters, we calculate the present geometrical parameters and demonstrate the accelerating behaviour of the Universe. Furthermore, we thoroughly examine the evolutionary behaviours of the Universe, noting that our model converges to the CDM model at late times. Finally, we investigate the energy conditions and find a violation of the strong energy condition, which could provide a valuable understanding of the nature of dark energy.
© The Author(s) 2024
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