The Schrödinger Equation with a Moving Point Interaction in Three Dimensions
arXiv:math-ph/0602005
Abstract
In the case of a single point interaction we improve, by different techniques, the existence theorem for the unitary evolution generated by a Schrödinger operator with moving point interactions obtained by Dell'Antonio, Figari and Teta.
Revised version, to appear in Proc. Am. Math. Soc