Five-Dimensional Cosmological Model with Quadratic Equation of State in a Scalar-Tensor Theory of Gravitation

Abstract

Five dimensional Kaluza – Klein space – time is considered in the presence of perfect fluid in the scalar – tensor theory of gravitation formulated by Saez and Ballester (Phys. Lett. A 113 : 467, 1986). A determinate solution of the field equations has been obtained under the assumption of quadratic equations of state (EoS). The physical and geometrical aspects of the model are also discussed.