Exploring accelerated expansion in the universe: A study of f(Q,T) gravity with parameterized EoS and cosmological constraints
Koussour M. Myrzakulov N. Rayimbaev J. Errehymy A. Donmez O.
August 2024Elsevier B.V.
Chinese Journal of Physics
2024#90108 - 120 pp.
The study conducted in this research paper utilizes the f(Q,T) gravity, where Q represents non-metricity and T represents the trace of the energy–momentum tensor, to investigate the accelerated expansion of the universe. To complete the study, an effective EoS with one parameter α, is parameterized as ωeff=−[Formula presented]. The linear version of f(Q,T)=−Q+σT is also considered, where σ is a constant. By constraining the model with six BAO points, 57 Hubble points, and 1048 Pantheon sample datasets, the parameters α and σ are determined to best match the data. The cosmological parameters and energy conditions for the model are derived and examined. The results show that the model is in good agreement with observations, and can serve as a valuable starting point for analyzing FLRW models in the f(Q,T) theory of gravity.
Accelerated expansion , Cosmological constraints , Equation of state , f(Q,T) gravity , Parameterization
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Department of Physics, University of Hassan II Casablanca, Morocco
L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
New Uzbekistan University, Mustaqillik Ave. 54, Tashkent, 100007, Uzbekistan
University of Tashkent for Applied Sciences, Gavhar Str. 1, Tashkent, 100149, Uzbekistan
National University of Uzbekistan, Tashkent, 100174, Uzbekistan
Astrophysics Research Centre, School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa
College of Engineering and Technology, American University of the Middle East, Egaila, 54200, Kuwait
Department of Physics
L.N. Gumilyov Eurasian National University
New Uzbekistan University
University of Tashkent for Applied Sciences
National University of Uzbekistan
Astrophysics Research Centre
College of Engineering and Technology
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