We analyze two identical qubits interacting with a single-mode quantized
radiation field, taking into account the influence of phase damping. The qubits are
assumed to be initially in a superposition of the excited and the ground states, and the
field is in a coherent state. The effects of the damping on the purity loss of the system
and different bipartite partitions of the system [field-two qubits, qubit–(field+qubit)]
through the tangles are considered. The effect of the damping on the entanglement of
field qubits state is evaluated by the negativity. It is noted that the phenomenon of death
and rebirth of the entanglement appears.With the increase in the phase parameter, this
phenomenon disappears.