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Robustness of energy landscape controllers for spin rings under coherent excitation transport

Sean P. O’Neil Orcid Logo, Frank C. Langbein Orcid Logo, Edmond Jonckheere, Sophie Shermer Orcid Logo

Research Directions: Quantum Technologies, Volume: 1

Swansea University Author: Sophie Shermer Orcid Logo

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DOI (Published version): 10.1017/qut.2023.5

Abstract

The design and analysis of controllers to regulate excitation transport in quantum spin rings presents challenges in the application of classical feedback control techniques to synthesize effective control and generates results in contradiction to the expectations of classical control theory. This p...

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Published in: Research Directions: Quantum Technologies
ISSN: 2752-9444
Published: Cambridge University Press (CUP) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa68719
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last_indexed 2025-03-08T05:54:25Z
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spelling 2025-03-07T16:52:12.4899771 v2 68719 2025-01-20 Robustness of energy landscape controllers for spin rings under coherent excitation transport 6ebef22eb31eafc75aedcf5bfe487777 0000-0002-5530-7750 Sophie Shermer Sophie Shermer true false 2025-01-20 BGPS The design and analysis of controllers to regulate excitation transport in quantum spin rings presents challenges in the application of classical feedback control techniques to synthesize effective control and generates results in contradiction to the expectations of classical control theory. This paper examines the robustness of controllers designed to optimize the fidelity of an excitation transfer to uncertainty in system and control parameters. We use the logarithmic sensitivity of the fidelity error as the robustness measure, drawing on the classical control analog of the sensitivity of the tracking error. Our analysis shows that quantum systems optimized for coherent transport demonstrate significantly different correlation between error and the log-sensitivity depending on whether the controller is optimized for readout at an exact time T or over a time-window T ± Δ/2. Journal Article Research Directions: Quantum Technologies 1 Cambridge University Press (CUP) 2752-9444 Spin networks; Coherent excitation transfer; Energy landscape control; Robust control 14 8 2023 2023-08-14 10.1017/qut.2023.5 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Another institution paid the OA fee Sean O’Neil acknowledges PhD funding from the US Army Advanced Civil Schooling program. 2025-03-07T16:52:12.4899771 2025-01-20T23:54:44.4400413 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Sean P. O’Neil 0000-0001-6669-4947 1 Frank C. Langbein 0000-0002-3379-0323 2 Edmond Jonckheere 3 Sophie Shermer 0000-0002-5530-7750 4 68719__33721__247cffd541d94251b9ecfb2911c21d50.pdf 68719.VoR.pdf 2025-03-03T10:30:22.8318125 Output 631163 application/pdf Version of Record true © The Author(s), 2023. This is an Open Access article, distributed under the terms of the Creative Commons Attribution-ShareAlike licence. true eng http://creativecommons.org/licenses/by-sa/4.0/
title Robustness of energy landscape controllers for spin rings under coherent excitation transport
spellingShingle Robustness of energy landscape controllers for spin rings under coherent excitation transport
Sophie Shermer
title_short Robustness of energy landscape controllers for spin rings under coherent excitation transport
title_full Robustness of energy landscape controllers for spin rings under coherent excitation transport
title_fullStr Robustness of energy landscape controllers for spin rings under coherent excitation transport
title_full_unstemmed Robustness of energy landscape controllers for spin rings under coherent excitation transport
title_sort Robustness of energy landscape controllers for spin rings under coherent excitation transport
author_id_str_mv 6ebef22eb31eafc75aedcf5bfe487777
author_id_fullname_str_mv 6ebef22eb31eafc75aedcf5bfe487777_***_Sophie Shermer
author Sophie Shermer
author2 Sean P. O’Neil
Frank C. Langbein
Edmond Jonckheere
Sophie Shermer
format Journal article
container_title Research Directions: Quantum Technologies
container_volume 1
publishDate 2023
institution Swansea University
issn 2752-9444
doi_str_mv 10.1017/qut.2023.5
publisher Cambridge University Press (CUP)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
active_str 0
description The design and analysis of controllers to regulate excitation transport in quantum spin rings presents challenges in the application of classical feedback control techniques to synthesize effective control and generates results in contradiction to the expectations of classical control theory. This paper examines the robustness of controllers designed to optimize the fidelity of an excitation transfer to uncertainty in system and control parameters. We use the logarithmic sensitivity of the fidelity error as the robustness measure, drawing on the classical control analog of the sensitivity of the tracking error. Our analysis shows that quantum systems optimized for coherent transport demonstrate significantly different correlation between error and the log-sensitivity depending on whether the controller is optimized for readout at an exact time T or over a time-window T ± Δ/2.
published_date 2023-08-14T08:22:03Z
_version_ 1826919414542368768
score 11.054598

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