Coherent control of subradiant excitations in atomic rings
Abstract
Subradiant excitations in ordered subwavelength atomic arrays are protected against radiative decay, making them a promising platform for storing and manipulating photonic excitations. The external geometry of the array, combined with dynamical control of the atomic dipole orientation, enables localized trapping and coherent transport of these subradiant excitations. Here, we theoretically demonstrate these capabilities in ring-shaped atomic arrays. Specifically, we show adiabatic transport of a localized excitation around a single ring, coherent transfer of a single excitation between two neighboring rings with geometry-controlled selectivity, and interaction-induced conditional phase shifts between two simultaneously trapped excitations in neighboring rings. Depending on the ring geometry, these realize either an entangling iSWAP-type exchange or a controlled-phase operation with tunable conditional phase. Together, these results demonstrate the potential of ordered atomic arrays as a platform for coherent photonic quantum information processing with dissipation-protected collective excitations.
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BibTeX
@misc{djatchkova2026coherent,
title = {{Coherent control of subradiant excitations in atomic rings}},
author = {Milena Djatchkova and Igor Lesanovsky and Beatriz Olmos},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2607.25638},
eprint = {2607.25638},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.25638},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Coherent control of subradiant excitations in atomic rings
AU - Milena Djatchkova
AU - Igor Lesanovsky
AU - Beatriz Olmos
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2607.25638
UR - https://arxiv.org/abs/2607.25638
AB - Subradiant excitations in ordered subwavelength atomic arrays are protected against radiative decay, making them a promising platform for storing and manipulating photonic excitations. The external geometry of the array, combined with dynamical control of the atomic dipole orientation, enables localized trapping and coherent transport of these subradiant excitations. Here, we theoretically demonstrate these capabilities in ring-shaped atomic arrays. Specifically, we show adiabatic transport of a localized excitation around a single ring, coherent transfer of a single excitation between two neighboring rings with geometry-controlled selectivity, and interaction-induced conditional phase shifts between two simultaneously trapped excitations in neighboring rings. Depending on the ring geometry, these realize either an entangling iSWAP-type exchange or a controlled-phase operation with tunable conditional phase. Together, these results demonstrate the potential of ordered atomic arrays as a platform for coherent photonic quantum information processing with dissipation-protected collective excitations.
ER -