Bouncing universe in the contexts of generalized cosmic Chaplygin gas and variable modified Chaplygin gas

摘要

In this work, we have considered the Friedmann-Robertson-Walker model of the universe where bounce occurs and the universe is filled with generalized cosmic Chaplygin gas or variable modified Chaplygin gas. We have studied the stability analysis through dynamical system for both models and found the critical points in flat, open, and closed universe. In the presence of a scalar field, the dynamical behavior of scale factor and Hubble parameter is described in both models. Finally, we have analyzed the energy conditions for both the models in bouncing universe.