Anisotropic f(Q) gravity model with bulk viscosity
Koussour M. Shekh S.H. Bennai M. Myrzakulov N.
14 March 2024World Scientific
Modern Physics Letters A
2024#39Issue 8
This study investigates the dynamics of a spatially homogeneous and anisotropic LRS Bianchi type-I Universe with viscous fluid in the framework of f(Q) symmetric teleparallel gravity. We assume a linear form for f(Q) and introduce hypotheses regarding the relationship between the expansion and shear scalars, as well as the Hubble parameter and bulk viscous coefficient. The model is constrained using three observational datasets: the Hubble dataset (31 data points), the Pantheon SN dataset (1048 data points), and the BAO dataset (6 data points). The calculated cosmological parameters indicate expected behavior for matter-energy density and bulk viscous pressure, supporting the universes accelerating expansion. Diagnostic tests suggest that the model aligns with a ΛCDM model in the far future and resides in the quintessence region. These findings are consistent with recent observational data and contribute to our understanding of cosmic evolution within the context of modified gravity and bulk viscosity.
Bianchi type-I Universe , bulk viscosity , deceleration parameter , f(Q) gravity
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Quantum Physics and Magnetism Team, LPMC, Faculty of Science Ben Msik, Casablanca Hassan II University, Morocco
Department of Mathematics, S. P. M. Science and Gilani Arts Commerce College, Ghatanji, Maharashtra, Yavatmal, 445301, India
Lab of High Energy Physics, Modeling and Simulations, Faculty of Science, University Mohammed V-Agdal, Rabat, Morocco
L. N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Quantum Physics and Magnetism Team
Department of Mathematics
Lab of High Energy Physics
L. N. Gumilyov Eurasian National University
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