Comprehensive study of generalized ghost dark energy in \(f(\textit{Q}, \textit{L}_{m})\) gravity: new insights into cosmic dynamics

Abstract

This paper explores the generalized ghost dark energy model in the framework of \(f(\textit{Q}, \textit{L}_{m})\) gravity, where \(\textit{Q}\) represents the non-metricity scalar, and \(\textit{L}_{m}\) denotes the matter-Lagrangian density. We take the homogeneous and isotropic universe with an ideal matter distribution and examine a scenario with interacting dark energy and dark matter. We then reconstruct \(f(\textit{Q}, \textit{L}_{m})\) model to examine the effects of this extended gravitational framework on the cosmic evolution. The behavior of numerous cosmic parameters is explored corresponding to distinct parametric values. The stability is evaluated by the squared sound speed method. The statefinder (r, s) and standard diagnostic pairs \((\omega _D-\omega '_{D})\) are used to study the various cosmic eras. Our results align with recent observational evidence, indicating that the \(f(\textit{Q}, \textit{L}_{m})\) model effectively characterizes dark energy and cosmic evolution.