Amit Samaddar

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gr-qc2025

Late-time cosmic dynamics in $f (R, L_{m})$ gravity with recent observations

Amit Samaddar, S. Surendra Singh

In this work, we investigate the late-time cosmic dynamics in the framework of non-linear $f (R, L_{m})$ gravity, adopting the functional form $f (R, L_{m}) = \frac{R}{2} + L_{m}^{2}$ . To explore…

gr-qc2025

Constraining $f (Q, L_{m})$ gravity with redshift-dependent pressure: Insights from observational probes

Amit Samaddar, S. Surendra Singh

We explore the late time cosmological dynamics of the Universe within the framework of $f (Q, L_{m})$ gravity by considering the specific form $f(Q, \mathcal{L}_m)=-Q+2\mat…

gr-qc2025

Observational signatures of scalar field dynamics in modified $f (Q, L_{m})$ gravity

Amit Samaddar, S. Surendra Singh

We investigate the cosmological implications of a tanh-parametrized scalar field model in the framework of modified $f (Q, L_{m})$ gravity by adopting the form $f(Q, L_{m})=Î²Q+Î´L_…

gr-qc2025

Cosmological insights from an exponential $O m (z)$ function in $f (T, T_{G})$ gravity framework

Amit Samaddar, S. Surendra Singh

We examine a modified teleparallel gravity model defined by $f (T, T_{G}) = T + I^^{3} T_{G} + I^´ T$ by introducing an exponential $O m (z)$ diagnostic of the form $Om(z)=Î±e^{\frac{…

gr-qc2025

Reconstructing cosmic expansion in $f (R, G)$ gravity using a log-periodic deceleration model

Amit Samaddar, S. Surendra Singh

We study the late-time cosmology in $f (R, G) = R + I^\pm R^{2} + I^^{2} e^{I^^{3} G}$ , using a logarithmic parametrization of the deceleration parameter $q (z) = q_{0} + q_{1} s in [l o g (1 + z)]$ . The Hubble par…

gr-qc2024

Constraining model parameters in f(Q,C) gravity: Observational analysis and geometric diagnostics

Amit Samaddar, S. Surendra Singh

We investigate the cosmological implications of $f (Q, C)$ gravity with $f (Q, C) = I^\pm Q + I^^{2} C$ , where $Q$ is the non-metricity scalar and $C$ encapsulates cosmological expansion terms. Thr…

Late-time cosmic dynamics in f(R,Lm​) gravity with recent observations

Constraining f(Q,Lm​) gravity with redshift-dependent pressure: Insights from observational probes

Observational signatures of scalar field dynamics in modified f(Q,Lm​) gravity

Cosmological insights from an exponential Om(z) function in f(T,TG​) gravity framework

Reconstructing cosmic expansion in f(R,G) gravity using a log-periodic deceleration model

Constraining model parameters in f(Q,C) gravity: Observational analysis and geometric diagnostics

Late-time cosmic dynamics in $f (R, L_{m})$ gravity with recent observations

Constraining $f (Q, L_{m})$ gravity with redshift-dependent pressure: Insights from observational probes

Observational signatures of scalar field dynamics in modified $f (Q, L_{m})$ gravity

Cosmological insights from an exponential $O m (z)$ function in $f (T, T_{G})$ gravity framework

Reconstructing cosmic expansion in $f (R, G)$ gravity using a log-periodic deceleration model