Aj. Mckane et Mb. Tarlie, REGULARIZATION OF FUNCTIONAL DETERMINANTS USING BOUNDARY PERTURBATIONS, Journal of physics. A, mathematical and general, 28(23), 1995, pp. 6931-6942
The formalism which has been developed to give general expressions for
the determinants of differential operators is extended to the physica
lly interesting situation where these operators have a zero mode which
has been extracted. In the approach adopted here, this mode is remove
d by a novel regularization procedure, which allows remarkably simple
expressions for these determinants to be derived.