S. S. Singh

collaborators

10 papers

physics.gen-ph2025

Baryogenesis constraints and parameter bounds in $f (T, T_{G})$ modified gravity

Amit Samaddar, S. Surendra Singh

We investigate the generation of the observed baryon asymmetry of the Universe within the framework of $f (T, T_{G})$ gravity, where $T$ is the torsion scalar and $T_{G}$ denotes its…

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…

astro-ph.CO2025

CPL-parametrized cosmic expansion in Galileon gravity: Constraints from recent data

Amit Samaddar, S. Surendra Singh

We explore the cosmic expansion history within the framework of Galileon gravity by employing a redshift-based expression for the Hubble rate, $H (z)$ , derived from the CPL parametr…

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})=βQ+δL_{m…

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 $f (R, G) = R + α R^{2} + β e^{γ G}$ , using a logarithmic parametrization of the deceleration parameter $q (z) = q_{0} + q_{1} s in [l o g (1 + z)]$ . The Hubble parame…

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 $f (Q, C) = α Q + β C$ , where $Q$ is the non-metricity scalar and $C$ encapsulates cosmological expansion terms. Three…

gr-qc2024

A novel approach to baryogenesis in $f (Q, L_{m})$ gravity and its cosmological implications

Amit Samaddar, S. Surendra Singh

We present an examination of the $f (Q, L_{m})$ gravity model, in which the functional form $f (Q, L_{m}) = α Q^{n} + β L_{m}$ is postulated and discuss its potential impact on cosmological…

gr-qc2024

Gravastar model in the structure of $f (R, L_{m}, T)$ modified theory of gravity

Meghanil Sinha, S. Surendra Singh

The Gravastar ( or the Gravitational Vacuum Star ) is a very serious alternatives proposed to the principle of the Black Hole, the model of which was originally developed by Mazur…

gr-qc2024

Behaviours of rip cosmological models in $f (Q, C)$ gravity

Amit Samaddar, S. Surendra Singh, Shah Muhammad +1

In this study, the Universe's rip cosmology theories have been provided for the $f (Q, C)$ gravity theory, where $Q$ and $C$ stand for the non-metricity scalar and boundary term. We…

Baryogenesis constraints and parameter bounds in f(T,TG​) modified gravity

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

CPL-parametrized cosmic expansion in Galileon gravity: Constraints from recent data

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

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

A novel approach to baryogenesis in f(Q,Lm​) gravity and its cosmological implications

Gravastar model in the structure of f(R,Lm​,T) modified theory of gravity

Behaviours of rip cosmological models in f(Q,C) gravity

Baryogenesis constraints and parameter bounds in $f (T, T_{G})$ modified gravity

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

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

A novel approach to baryogenesis in $f (Q, L_{m})$ gravity and its cosmological implications

Gravastar model in the structure of $f (R, L_{m}, T)$ modified theory of gravity

Behaviours of rip cosmological models in $f (Q, C)$ gravity