Role Of Generalized Cosmic Chaplygin Gas In Accelerating Universe : A Field Theoretical Prescription

TL;DR

This paper explores the role of generalized cosmic Chaplygin gas as a dark energy candidate in an accelerating universe, modeling it through a scalar field and potential, and comparing it with modified Chaplygin gas.

Contribution

It provides a field theoretical framework for generalized cosmic Chaplygin gas and compares its constraints and behavior with the modified Chaplygin gas model.

Findings

Generalized cosmic Chaplygin gas is less constrained than modified Chaplygin gas.

Statefinder parameters effectively characterize different universe phases.

The model offers a viable dark energy explanation in FRW cosmology.

Abstract

In this paper we investigate the role played by dark energy in the form of Generalized cosmic Chaplygin gas in an accelerating universe described by FRW cosmology. We have tried to describe the model from the theoretical point of view of a field, by introducing a scalar field $\phi$ and a self interacting potential $V(\phi)$. The corresponding expressions for the field are obtained for the given model. Statefinder parameters have been used to characterize the dark energy model. Plots have been generated for characterizing different phases of universe diagrammatically and a comparative study is performed with the Modified Chaplygin gas model. As an outcome of the study, Generalized cosmic Chaplygin gas is identified as a much less constrained form of dark energy as compared to modified Chaplygin gas.