Cw. Muller et Fw. Metz, PHASE-SPACE STUDY OF THE STERN-GERLACH EXPERIMENT, Journal of physics. A, mathematical and general, 27(10), 1994, pp. 3511-3522
We study the motion of neutral spinning particles in static inhomogene
ous magnetic fields, where the orbital motion and spin dynamic do not
factorize. Using the phase-space representation of quantum mechanics,
the Moyal propagator is obtained for the case of a linearized field. A
s an example, the evolution of particles in coherent rotational states
is calculated. In order to interprete the Wigner state function in a
classical mechanical way, we calculated the Husimi functions.