  We study the dynamical entanglement distribution in a multipartite system.
The initial state is a maximally entangled two level atom with a single photon
field. Next a sequence of atoms are sent, one at the time, and interact with
the field. We show that the which way information initially stored only in the
field is now distributed among the parties of the global system. We obtain the
corresponding complementarity relations in analytical form. We show that this
dynamics may lead to a quantum eraser phenomenon provided that measurements of
the probe atoms are performed in a basis which maximizes the visibility. The
process may be realized in microwave cavities with present technology.
