Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array

• DOI: 10.48550/arxiv.2309.15361
• Publication Date: 2023-01-01
• Authors: Chun-Chi Wu; Kuan-Ting Lin; I Gusti Ngurah Yu...; Chin-Hsun Chien; S. Goswami; Guin-Dar Lin; Ying-Cheng Chen; H. H. Jen
• Keywords: Anderson Localization

In one-dimensional quantum emitter systems, the dynamics of atomic excitations are influenced by collective coupling between emitters through photon-mediated dipole-dipole interactions. By introducing positional disorders in a portion array, we investigate delocalization phenomena at interface disordered zone and clean zone. The excitation is initialized as symmetric Dicke states zone, several measures used to quantify localization. We first use population imbalance half-chain entropy under time evolutions, further crossover localization via gap ratio from eigenspectrum reciprocal case. particular, study participation whole chain photon loss both ends chain, which can be non-reciprocal cases. Furthermore, increasing overall size or fixed number observe that occurs smaller disorder strength former case, while latter, facilitation appears when significant applied. Our results reveal competition sizes on phenomenon, give insights non-equilibrium emitter-waveguide interface, provide potential applications information processing.