Quintessence-like features in the late-time cosmological evolution of f(Q) symmetric teleparallel gravity
Myrzakulov N. Koussour M. Mussatayeva A.
October 2023Elsevier B.V.
Chinese Journal of Physics
2023#85345 - 358 pp.
In this study, we investigate the cosmological history within the framework of modified f(Q) gravity, which proposes an alternative theory of gravity where the gravitational force is described by a non-metricity scalar. By employing a parametrization scheme for the Hubble parameter, we obtain the exact solution to the field equations in f(Q) cosmology. To constrain our model, we utilize external datasets, including 57 data points from the Hubble dataset, 1048 data points from the SN dataset, and six data points from the BAO dataset. This enables us to determine the best-fit values for the model parameters involved in the parametrization scheme. We analyze the cosmic evolution of various cosmological parameters, including the deceleration parameter, which exhibits the expected behavior in late-time cosmology and changes its signature with redshift. Further, we present the evolution of energy density, EoS parameter, and other geometrical parameters with respect to redshift. Furthermore, we discuss several cosmological tests and diagnostic analyses. Our findings demonstrate that the late-time cosmic evolution can be adequately described without the need for dark energy by employing a parametrization scheme in modified gravity.
Cosmology , Dark energy , f(Q) gravity , Quintessence
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Department of Physics and Chemistry, S. Seifullin Kazakh Agrotechnical University, Astana, 010011, Kazakhstan
Quantum Physics and Magnetism Team, LPMC, Faculty of Science Ben Msik, Casablanca Hassan II University, Morocco
L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics, Astana, 010009, Kazakhstan
Department of Physics and Chemistry
Quantum Physics and Magnetism Team
L.N. Gumilyov Eurasian National University
Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics
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