Interacting Ghost Dark Energy Models with Variable $G$ and $\Lambda$

TL;DR

This paper explores models of a flat universe with variable gravitational and cosmological constants, analyzing their impact on cosmological parameters through numerical methods.

Contribution

It introduces and analyzes phenomenological models of variable G and Lambda with interacting fluids, providing new insights into their effects on cosmological evolution.

Findings

Variable G and Lambda influence the equation of state and deceleration parameters.

Interaction term Q affects the energy transfer between fluids.

Numerical analysis reveals specific behaviors of cosmological parameters over time.

Abstract

In this paper we consider several phenomenological models of variable $\Lambda$. Model of a flat Universe with variable $\Lambda$ and $G$ is accepted. It is well known, that varying $G$ and $\Lambda$ gives rise to modified field equations and modified conservation laws, which gives rise to many different manipulations and assumptions in literature. We will consider two component fluid, which parameters will enter to $\Lambda$. Interaction between fluids with energy densities $\rho_{1}$ and $\rho_{2}$ assumed as $Q=3Hb(\rho_{1}+\rho_{2})$. We have numerical analyze of important cosmological parameters like EoS parameter of the composed fluid and deceleration parameter $q$ of the model.