SEPARATION OF VARIABLES TREATMENT OF THE TIME-DEPENDENT DAMPED HARMONIC-OSCILLATOR WITH AN ARBITRARY VARYING MASS AND WITH A FORCE QUADRATIC IN THE VELOCITY UNDER THE ACTION OF AN ARBITRARY TIME-VARYING FORCE

We apply the new method developed recently by Efthimiou and Spector [P hys. Rev. A 49 (1994) 2301] to obtain the propagator of a complex time -dependent system discussed in our recent work. We obtain the same res ult as in our previous paper by adopting a Gaussian-type propagator.