  We study the generation of entanglement induced by a single-photon Gaussian
wavepacket in multi-atom bi-directional waveguide QED. In particular, we
investigate the effect of increasing the number of atoms on the average
pairwise entanglement. We demonstrate by selecting smaller decay rates and in
chiral waveguide settings, that both entanglement survival times and maximum
generated entanglement can be increased by at least a factor of 3/2,
independent of the number of atoms. In addition, we analyze the influence of
detuning and delays on the robustness of the generated entanglement. There are
potential applications of our results in entanglement based multi-qubit quantum
networks

Quantum Physics