Acta Scicentiarum Naturalum Universitis PekinesisThe invariant, propagator and wavefunction of a variable frequency harmonic oscillator in an electromagnetic fieldQian Shang-WuPublished Jan 1, 1993• 0 citationsOpenAlexAbstractThe invariant, propagator and wavefunction of a variable frequency harmonic oscillator in an electromagnetic field are obtained by means of a specific transformation and the phase space path integral method.