  We discuss the coherent leptoproduction of vector mesons from polarized
deuterium as a tool to investigate the evolution of small size quark-gluon
configurations. Kinematic regions are determined where the final state
interaction of the initially produced quark-gluon wave packet contributes
dominantly to the production cross section. Two methods for an investigation of
color coherence effects, which are appropriate for future experiments at
HERMES, are suggested.
