Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array
In one-dimensional quantum emitter systems, the dynamics of atomic excitations are influenced by the collective coupling between emitters through photon-mediated dipole-dipole interactions. By introducing positional disorders in a portion of the atomic array, we investigate the delocalization phenom...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.013159 |
| _version_ | 1797210254795079680 |
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| author | C.-C. Wu K.-T. Lin I. G. N. Y. Handayana C.-H. Chien S. Goswami G.-D. Lin Y.-C. Chen H. H. Jen |
| author_facet | C.-C. Wu K.-T. Lin I. G. N. Y. Handayana C.-H. Chien S. Goswami G.-D. Lin Y.-C. Chen H. H. Jen |
| author_sort | C.-C. Wu |
| collection | DOAJ |
| description | In one-dimensional quantum emitter systems, the dynamics of atomic excitations are influenced by the collective coupling between emitters through photon-mediated dipole-dipole interactions. By introducing positional disorders in a portion of the atomic array, we investigate the delocalization phenomena at the interface between the disordered and clean zones. The excitation is initialized as symmetric Dicke states in the disordered zone, and several measures are used to quantify the excitation localization. We first use population imbalance and half-chain entropy to investigate the excitation dynamics under time evolutions, and further investigate the crossover of excitation localization to delocalization via the gap ratio from the eigenspectrum in the reciprocal coupling case. In particular, we study the participation ratio of the whole chain and the photon loss ratio between both ends of the atomic chain, which can be used to quantify the delocalization crossover in the nonreciprocal coupling cases. Furthermore, by increasing the overall size or the ratio of the disordered zone under a fixed number of the whole chain, we observe that excitation localization occurs at a smaller disorder strength in the former case, while in the latter, facilitation of the delocalization appears when a significant ratio of the clean zone to disordered zone is applied. Our results can reveal the competition between the clean zone and the disordered zone sizes on localization phenomenon, give insights to nonequilibrium dynamics in the emitter-waveguide interface, and provide potential applications in quantum information processing. |
| first_indexed | 2024-04-24T10:07:41Z |
| format | Article |
| id | doaj.art-b4158ba87557428cb01292b1d2a25a44 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:07:41Z |
| publishDate | 2024-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-b4158ba87557428cb01292b1d2a25a442024-04-12T17:39:06ZengAmerican Physical SocietyPhysical Review Research2643-15642024-02-016101315910.1103/PhysRevResearch.6.013159Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic arrayC.-C. WuK.-T. LinI. G. N. Y. HandayanaC.-H. ChienS. GoswamiG.-D. LinY.-C. ChenH. H. JenIn one-dimensional quantum emitter systems, the dynamics of atomic excitations are influenced by the collective coupling between emitters through photon-mediated dipole-dipole interactions. By introducing positional disorders in a portion of the atomic array, we investigate the delocalization phenomena at the interface between the disordered and clean zones. The excitation is initialized as symmetric Dicke states in the disordered zone, and several measures are used to quantify the excitation localization. We first use population imbalance and half-chain entropy to investigate the excitation dynamics under time evolutions, and further investigate the crossover of excitation localization to delocalization via the gap ratio from the eigenspectrum in the reciprocal coupling case. In particular, we study the participation ratio of the whole chain and the photon loss ratio between both ends of the atomic chain, which can be used to quantify the delocalization crossover in the nonreciprocal coupling cases. Furthermore, by increasing the overall size or the ratio of the disordered zone under a fixed number of the whole chain, we observe that excitation localization occurs at a smaller disorder strength in the former case, while in the latter, facilitation of the delocalization appears when a significant ratio of the clean zone to disordered zone is applied. Our results can reveal the competition between the clean zone and the disordered zone sizes on localization phenomenon, give insights to nonequilibrium dynamics in the emitter-waveguide interface, and provide potential applications in quantum information processing.http://doi.org/10.1103/PhysRevResearch.6.013159 |
| spellingShingle | C.-C. Wu K.-T. Lin I. G. N. Y. Handayana C.-H. Chien S. Goswami G.-D. Lin Y.-C. Chen H. H. Jen Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array Physical Review Research |
| title | Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array |
| title_full | Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array |
| title_fullStr | Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array |
| title_full_unstemmed | Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array |
| title_short | Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array |
| title_sort | atomic excitation delocalization at the clean to disordered interface in a chirally coupled atomic array |
| url | http://doi.org/10.1103/PhysRevResearch.6.013159 |
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