Enhanced shortcuts to adiabaticity in an interacting giant-atom-atomic-waveguide system
Abstract
In realistic quantum systems, isolated few-level models usually provide only an approximate description, since the controlled subsystem is generally coupled to additional degrees of freedom. As a result, a quantum control scheme designed for an isolated system may lose its original performance in a more complex coupled setting. Here, we consider a giant atom coupled to an interacting atomic waveguide and investigate enhanced shortcuts to adiabaticity (eSTA) in such a structured system. As a first step, a weak-coupling perturbative analysis identifies how changes in the initial and target states, together with dynamical transitions, contribute to the fidelity loss. Starting from a shortcut to adiabaticity control scheme for the uncoupled system, the enhanced STA correction improves the final fidelity by modifying only the giant-atom control fields. This improvement is found for both periodic and open boundary conditions of the atomic waveguide. The results demonstrate a way to design an eSTA protocol for an interacting composite system.
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BibTeX
@misc{sun2026enhanced,
title = {{Enhanced shortcuts to adiabaticity in an interacting giant-atom-atomic-waveguide system}},
author = {Ruijin Sun and Zhihai Wang and Andreas Ruschhaupt},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00601},
eprint = {2611.00601},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00601},
}
RIS
TY - UNPB
TI - Enhanced shortcuts to adiabaticity in an interacting giant-atom-atomic-waveguide system
AU - Ruijin Sun
AU - Zhihai Wang
AU - Andreas Ruschhaupt
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00601
UR - https://arxiv.org/abs/2611.00601
AB - In realistic quantum systems, isolated few-level models usually provide only an approximate description, since the controlled subsystem is generally coupled to additional degrees of freedom. As a result, a quantum control scheme designed for an isolated system may lose its original performance in a more complex coupled setting. Here, we consider a giant atom coupled to an interacting atomic waveguide and investigate enhanced shortcuts to adiabaticity (eSTA) in such a structured system. As a first step, a weak-coupling perturbative analysis identifies how changes in the initial and target states, together with dynamical transitions, contribute to the fidelity loss. Starting from a shortcut to adiabaticity control scheme for the uncoupled system, the enhanced STA correction improves the final fidelity by modifying only the giant-atom control fields. This improvement is found for both periodic and open boundary conditions of the atomic waveguide. The results demonstrate a way to design an eSTA protocol for an interacting composite system.
ER -