Regularization of functional determinants using boundary perturbations
Alan J. McKane, Martin B. Tarlie · Journal of Physics A Mathematical and General · 1995
The formalism which has been developed to give general expressions for the determinants of differential operators is extended to the physically interesting situation where these operators have a zero mode which has been extracted. In the approach adopted here, this mode is removed by a novel regularization procedure, which allows remarkably simple expressions for these determinants to be derived.