Viscous cosmological models with a variable cosmological term

Abstract

Einstein's field equations for a Friedmann-Lamaitre Robertson-Walker universe filled with a dissipative fluid with a variable cosmological term L described by full Israel-Stewart theory are considered. General solutions to the field equations for the flat case have been obtained. The solution corresponds to the dust free model where . It also admits the exponential solution for hubble parameter which represent the period of hyperinflation or superinflation where the energy density and the cosmological term grow enormously. The temperature is regarded as a constant.


(Global Journal of Pure and Applied Sciences: 2003 9(4): 553-560)