Back to Search
Start Over
Late-time acceleration from ekpyrotic bounce in f(Q,T) gravity
- Source :
- International Journal of Geometric Methods in Modern Physics. 20
- Publication Year :
- 2023
- Publisher :
- World Scientific Pub Co Pte Ltd, 2023.
-
Abstract
- In this paper, we investigate the late-time accelerated universe evolution in a flat, homogeneous and isotropic model in the context of [Formula: see text] gravity, where [Formula: see text] and [Formula: see text] are non-metricity scalar and trace of energy–momentum tensor, respectively. The scale factor, by construction, yields ekpyrotic contraction era followed by a non-singular bounce. The expanding era of the universe yields late-time dark energy era preceded by matter-dominating decelerating era. The model unifies an ekpyrotic, non-singular bounce with the present dark energy-dominated epoch. The model parameters in the functional form of [Formula: see text] gravity affect the dynamical evolution of the equation of state (EoS) parameter. The theoretical value of EoS parameter is found to be [Formula: see text] for [Formula: see text], respectively, and it lies in range of the estimated value of EoS parameter from the Planck+SNe+BAO observational data. Different aspects of this bouncing model including behavior of geometrical and physical quantities along with energy conditions have been discussed in detail.
- Subjects :
- Physics and Astronomy (miscellaneous)
Subjects
Details
- ISSN :
- 17936977 and 02198878
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- International Journal of Geometric Methods in Modern Physics
- Accession number :
- edsair.doi...........a4b6ed5e944a75373b8c4a0fbdd8ecc2
- Full Text :
- https://doi.org/10.1142/s0219887823501311