Kinetic equation for noninteracting electrons in the presence of strongly disordered magnetic impurities

Abstract
We derive a kinetic equation for noninteracting electrons acted upon by an external (longitudinal) field slowly varying in space and time, in the presence of strongly disordered magnetic impurities. We show that this equation is of the Boltzmann type with an effective scattering kernel which is nonlocal in time and space. Implications for the physical mechanism leading to localization are discussed in conjunction with general symmetry arguments.