Modified cosmology in f(Q,Lm) gravity
Myrzakulov Y. Alfedeel A.H.A. Koussour M. Muminov S. Hassan E.I. Rayimbaev J.
July 2025Elsevier B.V.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
2025#866
In this letter, we investigate cosmology within the framework of modified f(Q,Lm) gravity using the non-linear model f(Q,Lm)=−Q+αLmn+β, where α, β, and n are free parameters. The modified Friedmann equations are derived for a matter-dominated universe, and an analytical solution is obtained. Using Hubble, Pantheon+, and joint datasets, we constrain the model parameters and examine their implications. The results indicate that the model accommodates varying H0 values, contributing to the Hubble tension, while n≠1 suggests deviations from general relativity (GR). The deceleration parameter confirms a transition to acceleration at zt≈0.6−0.8, with present values supporting cosmic acceleration. This model offers a viable alternative to GR-based cosmology.
Cosmology , Deceleration parameter , f(Q,Lm) gravity , Late-time acceleration , Modified gravity , Observational constraints
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Department of General & Theoretical Physics, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Department of Mathematics and Statistics, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 13318, Saudi Arabia
Department of Physics, University of Hassan II, Casablanca, Morocco
Mamun University, Bolkhovuz Street 2, Khiva, 220900, Uzbekistan
New Uzbekistan University, Movarounnahr Street 1, Tashkent, 100007, Uzbekistan
Urgench State University, Kh. Alimdjan str. 14, Urgench, 220100, Uzbekistan
Department of General & Theoretical Physics
Department of Mathematics and Statistics
Department of Physics
Mamun University
New Uzbekistan University
Urgench State University
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