Transient entanglement generation and control in few-photon bidirectional multiqubit chiral waveguide QED

Imran M. Mirza, John C. Schotland

Imran M. Mirza, John C. Schotland

Abdolreza Pasharavesh, Supratik Sarkar, Sai Sreesh Venuturumilli +1 more

Matthew Kozma, Sofia Arranz Regidor, Stephen Hughes

Imran M. Mirza, John C. Schotland

We study the generation of transient entanglement induced by a single-photon Gaussian wave packet in multiatom bidirectional-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 $\ensuremath{\sim}3/2$, 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 multiqubit quantum networks.

Imran M. Mirza, John C. Schotland

We study entanglement generation and control in bidirectional-waveguide QED driven by a two-photon Gaussian wave packet. 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 nonlinearities, 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 detunings and time-delays on the generated entanglement.