This simulation shows time-dependent quantum state wavefunctions for the rigid rotator, the spherical harmonic states projected on a sphere.  Position, angular momentum, and energy of the states can all be viewed, with phase shown with color.  Energy-eigenstate wavefunctions, and combinations of states, can be created through changes in the amplitude and phase of the basis states using spinors, or through the creation of Gaussian wavefunctions with the mouse.  The quantum numbers of the states are shown.