Analytic characterizations of gaugeability for generalized Feynman-Kac functionals

Abstract

We give analytic characterizations of gaugeability for generalized Feynman-Kac functionals including continuous additive functional of zero quadratic variation in the framework of symmetric Markov processes. Our result improves the previous work on the analytic characterization due to Z.-Q. Chen (2003) even if we restrict ourselves to deal with non-local perturbations. We also prove that such a characterization is also equivalent to semi-conditional gaugeability and to the subcriticality of the Schrödinger operator associated to our generalized Feynman-Kac semigroup under the conditional (semi-)Green-tightness of related measures.