Single photon routing in position-disordered waveguide quantum electrodynamics ladders

We study the problem of deterministic routing of single photons in waveguide quantum electrodynamics ladders. In the past, we [1] and others have examined the impact of dipole-dipole interactions on the routing scheme when multiple quantum emitters or atoms are coupled with chiral waveguides in the ladder settings. In this work, we analyze how routing efficiency is impacted if a disorder exists in the location of quantum emitters, either due to imperfect atomic trapping or temperature fluctuations in the surroundings of the setup. Average transmission, routing efficiency, and localization lengths have been calculated to explore the interplay between the collective atomic effects and the disorder-induced photon localization, which affects photon routing. Quantum communication and quantum networking are two areas where this work can be applied.

[1] "Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder," Bibandhan Poudyal, Imran M Mirza; Physical Review Research, 2 (4), 043048 (2020).