aiqbench analysis
This paper is a theoretical study of quantum control. It extends shortcuts to adiabaticity, a method for reaching a target quantum state quickly without losing fidelity, to a giant atom coupled to an interacting waveguide. Its main point is that control schemes designed for isolated few-level systems can degrade in realistic coupled settings, and that modifying only the giant-atom control fields can recover fidelity under both periodic and open boundary conditions. For quantum hardware readers, the practical value is a design principle for error-aware control of composite systems, though the results remain analytical and have not been validated experimentally.
Enhanced shortcuts to adiabaticity in an interacting giant-atom-atomic-waveguide system
arXiv:2611.00601v1 Announce Type: new 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.
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.
arXiv:2611.00601 [quant-ph]
(or arXiv:2611.00601v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2611.00601 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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Full text under the publisher's open licence · 246 words