We investigate the link between quantum Fisher information (QFI) and quantum entanglement
for a scheme of two atoms that interact with two non-degenerate modes in the absence and
presence of intrinsic decoherence effect. The explicit form of the density matrix approach to the dissipative
systems is given when the cavity-field is in generalized coherent states. The dynamical
behavior of the QFI is compared with the atom–atom concurrence entanglement. We examine
the effect of the dipole–dipole interaction and intrinsic decoherence on the dynamical properties
of the QFI, concurrence and variance entropy squeezing. It is found that the atom–atom concurrence
and the QFI can be controlled by the intrinsic decoherence and the dipole–dipole interaction.