SCALAR FIELD EQUATION IN ROBERTSON-WALKER SPACE-TIME

The quantization of the scalar field is reconsidered in some of its ba sic elements in the context of the Robertson-Walker space-time. The in tegration of the generalized Klein-Gordon equation is performed by pre liminary separation of the equation with the usual separation method. The orthonormal mode solutions are determined by the explicit integrat ion of the resulting angular and radial equations and by standard prop erties of the time equation. The time evolution given by the standard cosmological model is briefly discussed.