American Journal of PhysicsSemiclassical approximation and exact evaluation of the propagator for a harmonic oscillator with time-dependent frequencyC. P. NatividadePublished Oct 1, 1988• 7 citationsPublisherAbstractThe propagator for a one-dimensional harmonic oscillator with time-dependent frequency is calculated exactly by the semiclassical approximation method.DOI10.1119/1.15360