Inflationary Dynamics and Thermodynamics of Chaplygin Gas Models

Abstract

In this thesis, we study the reconstruction of warm in°ation model with the help of tensor to scalar ratio (r) and scalar spectral index (ns) in terms of number of e-folds (N). In this regards, we take °at FRW metric and discuss the general forms of dissipative coe±cient ¡(Á; T) as well as e®ec- tive potential V (Á; T) for two dissipative regimes i.e., the weak and strong. We use in°ationary parameters like slow roll parameters, power spectrum of the curvature perturbation, tensor spectrum, spectral index, scalar to tensor ratio and Hubble parameter to ¯nd the generalized form of dissipative coe±cient and e®ective potential. Further, we discuss generalized cosmic Chaplygin gas in the scenario of particle creation. We examine energy density (½), Hubble parameter (H), declaration parameter (q), temperature (T) and particle number density (n) under three di®erent models of particle creation rate. We also analyze the production of entropy and Bekenstein entropy in the scenario of ¯rst law of thermodynamics. We dis- cuss the validity of generalized second law of thermodynamics and thermal equilibrium under three models of ¡ and discuss the graphical behavior of above mentioned terms.