  The resonant interaction of two nonidentical two-level atoms with one mode of
the electromagnetic field has been considered. The pure-state evolution of the
atomic states for field initially in the coherent state and atoms in the ground
state has been investigated. It has been shown that for intermediate values of
the relative differences of two coupling constants the atoms as well as the
field are returned most closely to a pure state at the revival time. The
possibility of the maximally entangled states at the beginning of the collapse
time has been discussed.
