  The entanglement dynamics of an exactly solvable, pure dephasing model are
studied. Repeated projective measurements are performed on the two-qubit
system. Due to the system-environment interaction, system-environment
correlations are established between each measurement. Consequently, the
environment state keeps evolving. We investigate the effect of this changing
environment state on the entanglement dynamics. In particular, we compare the
dynamics with the case where the environment state is repeatedly reset.
