Lissajous coherent states via projection
This paper constructs stationary coherent states concentrated on Lissajous figures for isotropic and anisotropic harmonic oscillators by projecting products of ordinary coherent states onto degenerate subspaces, thereby clarifying phase singularities, linking probability current laminar flow to quantum interference, and providing a rigorous definition of vortex states that resolves to known SU(2) coherent states in the isotropic limit.