Chirality-driven delocalization in disordered waveguide-coupled quantum arrays

We study theoretically the competition between directional asymmetric coupling and disorder in a one-dimensional array of quantum emitters chirally coupled through waveguide mode. Our calculation reveals highly nontrivial phase diagram for eigenstates' spatial profile, nonmonotonously depending on directionality strength. The increase asymmetry drives transition from Anderson localization bulk delocalized states to chirality-induced at edge. Counterintuitively, this is not smeared by strong but becomes sharper instead. findings could be important rapidly developing field electrodynamics, where chiral interactions play crucial roles.