The dynamics of entanglement in two-atom Tavis-Cummings model with non-degenerate two-photon transitions for tripartite entangled W-like states

The influence of dipole-dipole interaction on the entanglement between two atoms with different initial entangled W-like states in Tavis-Cummings model with degenerate two-photon transitions has been investigated. The results show that the entanglement between two atoms can be increased by means of dipole-dipole interaction and for some initial states the entanglement sudden death effect can be weakened.