  We study entanglement generation and control in bi-directional waveguide QED
driven by a two photon Gaussian wavepacket. In particular, we focus on how
increasing the number of qubits affects the overall average pairwise
entanglement in the system. We also investigate how the presence of a second
photon can introduce non-linearities, thereby manipulating the generated
entanglement. In addition, we show that through the introduction of chirality
and small decay rates, entanglement can be stored and enhanced up to factors of
2 and 3, respectively. Finally, we analyze the influence of finite detunnings
and time-delays on the generated entanglement.
