American Journal of Physics
Canonical transformation to the free particle
Edward N. Glass, Joseph J. G. Scanio
Abstract
It is shown how to find some canonical transformations without solving the Hamilton–Jacobi equation. The canonical transformation from the harmonic oscillator to the free particle is constructed and used as an example of transformations which cannot be maintained when going from classical to quantum systems. The group of canonical transformations which can be carried over to quantum mechanics is discussed.