Cosmology in f(R,L) gravity

• DOI: 10.1016/j.physletb.2022.137148
• Publication Date: 2022-05-06T15:37:09Z
• Authors: Lakhan V. Jaybhaye; Raja Solanki; Sanjay Mandal; P.K. Sahoo
• Keywords: Friedmann–Lemaître–Robertson–Walker metric; Deceleration parameter; Quintessence

In this letter, we investigate the cosmic expansion scenario of universe in framework f(R,Lm) gravity theory. We consider a non-linear model, specifically, f(R,Lm)=R2+Lmn+β, where n and β are free model parameters. Then derive motion equations for flat FLRW obtain exact solution corresponding field equations. estimate best fit ranges parameters by using updated H(z) datasets consisting 57 points Pantheon 1048 points. Further physical behavior density deceleration parameter. The evolution parameter depicts transition from to acceleration phases universe. Moreover, analyze stability our cosmological under observational constraint considering linear perturbation. Lastly, Om diagnostic observe that shows quintessence type behavior. conclude agrees with recent studies can efficiently describe late time acceleration.