2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185784We discuss the semiclassical approaches for describing systems with spin-orbit interactions by Littlejohn and Flynn (1991, 1992), Frisk and Guhr (1993), and by Bolte and Keppeler (1998, 1999). We use these methods to derive trace formulae for several two- and three-dimensional model systems, and exhibit their successes and limitations. We discuss, in particular, also the mode conversion problem that arises in the strong-coupling limit.LaTeX2e, 25 pages incl. 9 figures, version 3: final version in print for J. Phys. AChaotic DynamicsMesoscale and Nanoscale PhysicsMathematical PhysicsExactly Solvable and Integrable SystemsNuclear Theorytext