Regular Article - Theoretical Physics
Bounce cosmology in gravity
Institute of Physics, Gomal University, 29220, Dera Ismail Khan, Khyber Pakhtunkhwa, Pakistan
2 Department of Physics, Abdul Wali khan University Mardan, 23200, Mardan, Pakistan
Accepted: 3 February 2021
Published online: 16 February 2021
In this paper, we analyze the modified gravity models in Friedmann–Lemaître–Robertson–Walker (FLRW) background. The actions of bouncing cosmology are studied under consideration of different viable models in gravity theory that can resolve the difficulty of singularity in standard Big-Bang cosmology. Under different viable models in gravity theory, the cosmological constraints are plotted in provisions of cosmic-time, then investigated the bounce circumstance. In addition, the red-shift parameter is used to reconstruct the modified gravity, and compile the cosmological parameters that infer accelerated universe expansion. Finally, the situation stability is evaluated with a sound speed feature, which illustrates late-time stability.
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