Bianchi Type VIII Inflationary Universe with Massless Scalar Field in General Relativity

Bianchi Type VIII inflationary universe in the presence of massless scalar field with flat potential is investigated. To get the deterministic model of the universe, we assume that the shear is proportional to expansion as considered by Thorne [20] and Collins et al.[21]. The model represents decelerating and accelerating phases of universe and spatial volume increases exponentially with time representing inflationary scenario. The model initially represents anisotropic space-time. However, it isotropizes in special case. The Higgs field evolves slowly but the universe expands.