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Information-theoretic characterization of uncertainties of quantum systems and development of quantum robust control theory

Research Project

Project/Area Number 19K03619
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12040:Applied mathematics and statistics-related
Research InstitutionKyoto University

Principal Investigator

Ohki Kentaro  京都大学, 情報学研究科, 助教 (40639233)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords適応制御 / ロバスト制御 / ロバスト安定化 / 量子制御 / ロバスト安定性解析 / ロバスト適応制御 / オンライン学習 / 低次元化フィルタ / 量子ビット制御 / 量子スムージング
Outline of Research at the Start

本研究は量子系におけるロバスト制御理論の構築を目指すものである.既存の多くの手法は古典的なロバスト制御の手法を量子系に適用したものがほとんどであり,古典パラメータ変動等に対するロバスト性はあるが,量子系の状態遷移に対してロバストであるかどうかは試さなければ分からない状況である.本研究では,とくに量子情報処理における不確かさを定量化し,量子系に対して自然なロバスト制御理論を構築することを目標とする.

Outline of Final Research Achievements

This research addressed the control problem of uncertainty in quantum systems. The main results were a performance analysis of robust stabilization control for finite-dimensional quantum systems due to unexpected modeling errors and an extension of robust adaptive control to quantum systems. Because finite-dimensional quantum systems are commonly used as quantum information processing devices, providing effective control laws for such systems is crucial. In this research, we investigated the effect of uncertainty on stabilization control. We probabilistically evaluated the level of modeling error required to remain near the desired equilibrium point to which the system converges. We also clarified that when modeling errors are parametric, it is possible to converge to a specific equilibrium point by learning the parameters, regardless of the size of the error.

Academic Significance and Societal Importance of the Research Achievements

安定化制御のロバスト性解析は,平衡点を消失させないモデル化誤差を考えて行われることが多く,平衡点へ収束が原理的にできない場合の確率系に対する解析的な結果を得ることは本研究が初めてである.また,非線形確率系としてモデル化される量子系に対する適応制御の研究はこれまでになく,量子制御理論に新たな方向性を与えた.
また,これらの研究成果は,量子系の設計においてどの程度精密に作成しなければいけないかという設計指針を与え,実際のデバイス開発の指針を与えられるものと期待される.

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (21 results)

All 2024 2023 2022 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (20 results) (of which Int'l Joint Research: 11 results,  Invited: 2 results)

  • [Journal Article] Mean-field type quantum filter for a quantum Ising type system2020

    • Author(s)
      Kentaro Ohki
    • Journal Title

      IFAC-PapersOnLine

      Volume: 53 Issue: 2 Pages: 2243-2248

    • DOI

      10.1016/j.ifacol.2020.12.1489

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] H∞フィルタ理論を用いた低ランク Kalman-Bucy フィルタ2024

    • Author(s)
      都築大樹, 大木健太郎
    • Organizer
      第11回計測自動制御学会制御部門マルチシンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] On the Robustness of Stability for Quantum Stochastic Systems2023

    • Author(s)
      Weichao Liang, Kentaro Ohki, Francesco Ticozzi
    • Organizer
      62nd IEEE Conference on Decision and Control (CDC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On faster convergence of stochastic approximation for adaptive quantum control2023

    • Author(s)
      Kentaro Ohki, Shoju Enami
    • Organizer
      The 22nd World Congress of the International Federation of Automatic Control(IFAC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 正規行列をシステム行列にもつ低ランクKalmanフィルタの解析2023

    • Author(s)
      都築大樹, 大木健太郎
    • Organizer
      第66回自動制御連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 雑音駆動型量子アニーリングの検討2022

    • Author(s)
      34.江波祥樹,大木健太郎
    • Organizer
      第66回システム制御情報学会研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] N準位量子系の適応ロバスト制御における可到達性解析2022

    • Author(s)
      江波祥樹,大木健太郎
    • Organizer
      第9回 制御部門マルチシンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Comparison of Estimation Error between Two Different Low-Rank Kalman-Bucy Filters2021

    • Author(s)
      Shuto Yamada, Kentaro Ohki
    • Organizer
      SICE Annual Conference 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Convergence analysis of adaptive tuning parameter for robust stabilizing control of N-level quantum systems2021

    • Author(s)
      Shoju Enami, Kentaro Ohki
    • Organizer
      SICE Annual Conference 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] A proposal of adaptive parameter tuning for robust stabilizing control of N-level quantum angular momentum systems2021

    • Author(s)
      Shoju Enami, Kentaro Ohki
    • Organizer
      The 60th Conference on Decision and Control (CDC2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] On Recursive Quantum State Smoothing2021

    • Author(s)
      Kentaro Ohki
    • Organizer
      The 53rd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS’21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] N準位量子系のロバスト制御のための適応パラメータ推定2021

    • Author(s)
      江波祥樹,大木健太郎
    • Organizer
      第65回システム制御情報学会研究発表会(SCI’21)
    • Related Report
      2021 Research-status Report
  • [Presentation] N準位量子系の適応ロバスト制御のための適応ゲイン設計の考察2021

    • Author(s)
      江波祥樹,大木健太郎
    • Organizer
      第64回自動制御連合講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 移動エントロピーによるダイナミカルシステムのモデル次数選択2021

    • Author(s)
      渡辺陵真,大木健太郎
    • Organizer
      第64回自動制御連合講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] On a New Low-Rank Kalman-Bucy Filter and Its Convergence Property2020

    • Author(s)
      Shuto Yamada, Kentaro Ohki
    • Organizer
      The 52nd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS '20)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mean-field type quantum filter for a quantum Ising type system2020

    • Author(s)
      Kentaro Ohki
    • Organizer
      the 1st Virtual IFAC World Congress (IFAC-V 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] パケットロスのあるシステムに対するイベント駆動型推定と通信量削減手法の提案2020

    • Author(s)
      梶田健ノ介,大木健太郎
    • Organizer
      自動制御連合講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 量子状態スムージング:再帰的手法への一考察2020

    • Author(s)
      大木健太郎
    • Organizer
      第7回 制御部門マルチシンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Mean-field type quantum filter for a quantum Ising type system2020

    • Author(s)
      Kentaro Ohki
    • Organizer
      21st IFAC World Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Distributed control of stochastic battery systems via mean field game2019

    • Author(s)
      Nobuya Kamo, Kentaro Ohki
    • Organizer
      SICE Annual Conference 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] An event-based quantum error correction via measurement-based feedback control2019

    • Author(s)
      Shuto Yamada, Kentaro Ohki, Kenji Kashima
    • Organizer
      SICE Annual Conference 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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