ZETA-FUNCTION REGULARIZATION OF ONE-LOOP EFFECTIVE POTENTIALS IN ANTI-DESITTER SPACETIME

We use the zeta-function technique to calculate the one-loop effective potential for a scalar field in anti-de Sitter (AdS) space. The zeta function is computed exactly on the four-dimensional hyperbolic space H-4, the Euclidean section appropriate for AdS space. The structure of the ultraviolet divergences is shown to agree with previous calculations where Pauli-Villars or some version of dimensional regularization was used. The finite part of the effective potential is given explicitly by an integral over a variable related to the spectrum of the Laplace-Beltrami operator on H-4.