  We discuss some recent developments made in the computation of the baryon
asymmetry generated at the electroweak scale. We emphasize that the local
number density asymmetries of the particles involved in supersymmetric
electroweak baryogenesis must be described by a set of Quantum Boltzmann
Equations. These diffusion equations automatically and self-consistently
incorporate the CP-violating sources which fuel baryogenesis and manifest
``memory'' effects which are typical of the quantum transport theory and are
not present in the classical approach.
