V. The Semiclassical Foldy-Wouthuysen Transformation and the Derivation of the Bloch Equation for Spin-1/2 Polarised Beams Using Wigner Functions

Abstract

A semiclassical Foldy--Wouthuysen transformation of the Dirac equation is used to obtain the radiationless Bloch equation for the polarisation density.Comment: 7 pages. No figures. Latex. Paper 5 of a set of 5. others are physics/9901038 physics/9901041 physics/9901042 physics/990104