Alexander Elgart, George Hagedorn
An Adiabatic Theorem for Resonances
(350K, LaTeX 2e with 2 PS Figures)

ABSTRACT.  We prove a robust extension of the quantum adiabatic theorem. The theorem applies to systems that have resonances instead of bound states, and to systems for which just an approximation to a bound state is known. 
To demonstrate the theorem's usefulness in a concrete situation, we apply 
it to shape resonances.