Comment on: ``Semiclassical theory of spin-orbit interactions using spin coherent states''

Abstract

We point out that a certain kind of combined classical translational and spin dynamics -- claimed in [M. Pletyukhov, et al. Phys. Rev. Lett. 89 (2002) 116601] to arise from the Pauli equation in the semiclassical limit $\hslash \to 0$ for fixed spin -- only shows up if one simultaneously considers the high spin limit $S\to \infty$.