  We provide an analytical investigation of the pairwise entanglement dynamics
for a system, consisting an arbitrary number of qubits dissipating into a
common and non-Markovian environment for both weak and strong coupling regimes.
In the latter case, a revival of pairwise entanglement due to the memory depth
of the environment is observed. The leakage of photons into a continuum state
is assumed to be the source of dissipation. We show that for an initially
Werner state, the environment washes out the pairwise entanglement, but a
series of non-selective measurements can protect the relevant entanglement. On
the other hand, by limiting the number of qubits initially in the superposition
of single excitation, a stationary entanglement can be created between qubits
initially in the excited and ground states. Finally, we determine the
stationary distribution of the entanglement versus the total number of qubits
in the system.
