Entanglement between qubits due to the atomic coherence

We have investigated the influence of dipole-dipole interaction and initial atomic coherence on the dynamics of two-qubit entanglement. We have considered a model, in which only one atom cou-ples to a quantum electromagnetic field in a finite-Q cavity, since one of them can freely move out-side the cavity. We have shown the possibility of disappearance of the entanglement sudden death ef-fect and stabilization of atomic entanglement in the presence of the dipole interaction of qubits.