ABSTRACT
Chiral dichroism is fundamentally based on interference effects in inelastic scat-
tering. For a single atom scatterer one can get away with manually tracing
wavevectors and analytically writing down the interference terms as is done in
Chap. 3. When the fact that the atomic scatterers are located in a crystal matrix
is taken into account and many scattering centres are available, this technique
becomes prohibitively complex. Treating more than one atom in a crystal is
however fundamentally important since, as we will show, the influence on the
interference signal can be large. Moreover, there is always elastic scattering which
needs to be included since it can make specific waves interfere that would not be
present in a single atomic scattering case. This is exactly what is meant when using
the crystal as a beam splitter as explained in Chap. 3.
