Effect of Viscosity in Brane-World

Abstract

I present an exact cosmological solutions in the Randall- Sundrum type II (RS) brane-world model with or without Gauss-Bonnet (GB) term in the presence of an imperfect fluid. I consider both power law model and exponential model of the early universe in this case. Cosmological models are obtained with viscosity described by Truncated Israel-Stewart (TIS) theory. It is found that the effect of viscosity increases the rate of expansion of the universe during GB regime. I also syudy the stability of the equilibrium points of the dynamical system associated with the evolution of the viscous fluid in the RS Brane with or without a GB term.