ABSTRACT
In Chapter 2 the mechanism of spin relaxation phenomena has been
explained in a semi-phenomenological, intuitive way. However, for
more complex (real) spin systems one can hardly deal with spin
dynamics in terms of “kinetic equations.” Comprehensive theories of
spin relaxation are based on the concept of a density operator, which
is introduced in this chapter. The formal theory of spin relaxation is
presented in terms of the density operator formalism.
