Ohki, Kentaro(Graduate School of Informatics, Department of Informatics) | Activity Database on Education and Research, Kyoto University

Ohki, Kentaro

Graduate School of Informatics, Department of Informatics Assistant Professor

Last Updated :2023/09/22

Basic Information

Faculty

工学部工学部

Professional Memberships

The Institute of Systems, Control and Information Engineers

The Physical Society of Japan

IEEE

The Society of Instrument and Control Engineers

Academic Degree

Master of Information Science and Technology(The University of Tokyo)

Ph.D.(Information Science and Technology)(The University of Tokyo)

Language of Instruction

English

ID,URL

J-Global ID
201401027303625554
External link
https://www.bode.amp.i.kyoto-u.ac.jp/member/ohki/

researchmap URL

https://researchmap.jp/7000009165

Last Updated :2023/09/22

Research

Research Topics, Overview of the research

Research Topics
Robust filtering and control theory for stochastic and open quantum systems
Overview of the research
My research interests are in estimation and control of stochastic dynamical systems, in particular, quantum dynamical systems, and their applications to quantum information technology. My research interests are mathematics related to quantum and probability theory, which includes stochastic calculus, quantum stochastic calculus, classical and quantum statistics, the theory of operator algebras, and optimization theory, and also applications to implement quantum information technology (e.g., quantum computation and quantum communication).

Research Interests

Quantum filtering theory

quantum control theory

stochastic filtering theory

Adaptive control

Research Areas

Natural sciences, Applied mathematics and statistics, Quantum statistics, quantum information

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Control and systems engineering, Quantum control, filtering theory, stochastic control theory, adaptive control

Papers

Threshold theorem in isolated quantum dynamics with stochastic control errors
Manaka Okuyama; Kentaro Ohki; Masayuki Ohzeki
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 05 Dec. 2022, Peer-reviewed

Mean-field type quantum filter for a quantum Ising type system
Kentaro Ohki
IFAC-PapersOnLine, 2020, Peer-reviewed, Lead author, Corresponding author

An event-based quantum error correction via measurement-based feedback control
Shuto Yamada; Kentaro Ohki; Kenji Kashima
SICE Annual Conference, Sep. 2019, Peer-reviewed

A study of minimax LEQG control with constant-constrained Renyi divergence
Nobuya Kamo; Kentaro Ohki
The 50th ISCIE International Symposium on Stochastic Systems Theory and Its Applications, Nov. 2018, Peer-reviewed

Quantum smoother for open quantum systems driven by quantum jump-diffusion processes
Kentaro Ohki
The 50th ISCIE International Symposium on Stochastic Systems Theory and Its Applications, Nov. 2018, Peer-reviewed

Analyzing the effects of transmission line fault on the stochastic model predictive controlled IEEE 30-bus system with uncertain environment
Kentaro Ohki; Takuya Kakehashi; Hideharu Sugihara; Kenji Kashima; Yoshito Ohta
2017 IEEE Conference on Control Technology and Applications (CCTA), Aug. 2017, Peer-reviewed

Nonclassical state generation for linear quantum systems via nonlinear feedback control
Kentaro Ohki; Koji Tsumura; Reiji Takeuchi
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Jun. 2017, Peer-reviewed

Power generation scheduling with transmission line thermal constraints: A case study
Yuya Tomisawa; Kentaro Ohki; Hideharu Sugihara; Kenji Kashima; Yoshito Ohta
2nd SICE International Symposium on Control Systems 2016, Mar. 2016, Peer-reviewed

Exploitation of uncertain weather forecast data in power network management
Y. Tomisawa; K. Ohki; H. Sugihara; K. Kashima; Y. Ohta
IFAC PAPERSONLINE, 2016, Peer-reviewed

A smoothing theory for open quantum systems: The least mean square approach
Kentaro Ohki
Proceedings of the IEEE Conference on Decision and Control, 08 Feb. 2015, Peer-reviewed

Quantum-Enhanced Optical-Phase Tracking
Hidehiro Yonezawa; Daisuke Nakane; Trevor A. Wheatley; Kohjiro Iwasawa; Shuntaro Takeda; Hajime Arao; Kentaro Ohki; Koji Tsumura; Dominic W. Berry; Timothy C. Ralph; Howard M. Wiseman; Elanor H. Huntington; Akira Furusawa
SCIENCE, Sep. 2012, Peer-reviewed

On quantum-classical equivalence for linear systems control problems and its application to quantum entanglement assignment
Kentaro Ohki; Shinji Hara; Naoki Yamamoto
Proceedings of the IEEE Conference on Decision and Control, 2011, Peer-reviewed

Robust quantum Kalman filtering under the phase uncertainty of the probe-laser
Sanae Iida; Kentaro Ohki; Naoki Yamamoto
Proceedings of the IEEE International Symposium on Computer-Aided Control System Design, 2010, Peer-reviewed

A proposal of adaptive parameter tuning for robust stabilizing control of N–level quantum angular momentum systems
Shoju Enami; Kentaro Ohki
2021 60th IEEE Conference on Decision and Control (CDC), 14 Dec. 2021, Peer-reviewed, Corresponding author

Comparison of estimation error between two different low-rank Kalman-Bucy filters
Shuto Yamada; Kentaro Ohki
2021 60th Annual Conference of the Society of Instrument and Control Engineers of Japan (SICE), Sep. 2021, Peer-reviewed, Corresponding author

Convergence analysis of adaptive tuning parameter for robust stabilizing control of N-level quantum systems
Shoju Enami; Kentaro Ohki
2021 60th Annual Conference of the Society of Instrument and Control Engineers of Japan (SICE), Sep. 2021, Peer-reviewed, Corresponding author

Misc.

LPV system identication using ε-support vector regression : A numeric verification of robustness against outliers
山岡誠司; 大木健太郎; 太田快人
システム制御情報学会研究発表講演会講演論文集, 15 May 2013

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
江波祥樹; 大木健太郎
第65回システム制御情報学会研究発表会(SCI’21)予稿集, May 2021

散逸ダイナミクスを用いた量子復号
下村光彦; 大木健太郎; 津村幸治
第8回制御部門マルチシンポジウム, Mar. 2021

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
梶田健ノ介; 大木健太郎
第63回自動制御連合講演会, Nov. 2020

量子状態スムージング：再帰的手法への一考察
大木健太郎
第７回制御部門マルチシンポジウム予稿集, Mar. 2020

平均場ゲームを用いた大規模量子フィードバック制御にむけて
大木健太郎
第62回自動制御連合講演会予稿集, Nov. 2019

イベント駆動型測定に基づく量子誤り訂正
山田脩人; 大木健太郎; 加嶋健司
第63回システム制御情報学会研究発表会(SCI’19)予稿集, May 2019

フィードバック制御によるロバスト量子アニーリング計算精度の向上に向けて
大木健太郎
第6回計測自動制御部門マルチシンポジウム予稿集, Mar. 2019

確率ネットワーク化システムにおける移動エントロピーの解析とネットワーク推定問題への応用
村上正和; 大木健太郎
第62回システム制御情報学会研究発表講演会, May 2018

量子系におけるネットワーク化制御とその応用
大木健太郎
第62回システム制御情報学会研究発表講演会, May 2018

グラディエント・フローを用いた正四面体の展開図作成法の検討
加茂暢也; 大木健太郎
第62回システム制御情報学会研究発表講演会, May 2018

移動情報量を用いたネットワーク推定問題の検討
村上正和; 大木健太郎
第60回自動制御連合講演会, Nov. 2017

Exploitation of uncertain weather forecast data in transmission capacity management of the IEEE 30-bus system
Takuya Kakehashi; Kentaro Ohki; Eiji Sugihara
The 4th Multi-Symposium on Control Systems, Mar. 2017

An invitation to quantum filtering and smoothing theory based on two inner products
Kentaro Ohki
RIMS Kokuroku, Jan. 2017

Optimal Power Generation scheduling with transmission line thermal constraints by model predictive control
Yuya Tomisawa; Kentaro Ohki; Kenji Kashima; Yoshito Ohta
第60回システム制御情報学会研究発表講演会, May 2016

Power generation scheduring with uncertain transmission line temperature constraints by stochastic model predictive control scheme
Yuya Tomisawa; Kentaro Ohki; Hideharu Sugihara; Kenji Kashima; Yoshito Ohta
SICE International Symposium on Control Systems 2016, Mar. 2016, Peer-reviewed

Flow of information between bipartite linear quantum systems and quantum entanglement
Yusuke Tanbo; Kentaro Ohki
第59回システム制御情報学会研究発表講演会, May 2015

確率的な現象とその多様な捉え方
大木健太郎; 加嶋健司
計測と制御, Apr. 2013, Peer-reviewed, Invited

Presentations

On faster convergence of stochastic approximation for adaptive quantum control
Kentaro Ohki; Shoju Enami
The 22nd World Congress of the International Federation of Automatic Control, 12 Jul. 2023

Quantum Information Decoding Using Dissipative Dynamics
Mitsuhiko Tokoyoda; Kentaro Ohki; Koji Tsumura
The 22nd World Congress of the International Federation of Automatic Control, 10 Jul. 2023

雑音駆動型量子アニーリングの検討
江波祥樹; 大木健太郎
第66回システム制御情報学会研究発表会(SCI’22), 19 May 2022

Convergence analysis of adaptive tuning parameter for robust stabilizing control of N-level quantum systems
Shoju Enami; Kentaro Ohki
SICE Annual Conference 2021, 08 Sep. 2021

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
江波祥樹; 大木健太郎
第65回システム制御情報学会研究発表会(SCI’21), 28 May 2021

散逸ダイナミクスを用いた量子復号
下村光彦; 大木健太郎; 津村幸治
第8回制御部門マルチシンポジウム, Mar. 2021

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
梶田健ノ介; 大木健太郎
第63回自動制御連合講演会, 22 Nov. 2020

On a New Low-Rank Kalman-Bucy Filter and Its Convergence Property
Shuto Yamada; Kentaro Ohki
The 52nd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS '20), 30 Oct. 2020

Mean-field type quantum filter for a quantum Ising type system
Kentaro Ohki
the 1st Virtual IFAC World Congress, 12 Jul. 2020

平均場ゲームを用いた大規模量子フィードバック制御にむけて
大木健太郎
第62回自動制御連合講演会, 08 Nov. 2019

Distributed Control of Stochastic Battery Systems Via Mean Field Game
Nobuya Kamo; Kentaro Ohki
SICE 2019, 11 Sep. 2019

An Event-Based Quantum Error Correction Via Measurement-Based Feedback Control
Shuto Yamada; Kentaro Ohki; Kenji Kashima
SICE 2019, 11 Sep. 2019, Invited

イベント駆動型測定に基づく量子誤り訂正：１補助ビットを用いたアプローチ
山田脩人; 大木健太郎; 加嶋健司
第63回システム制御情報学会研究発表講演会, 24 May 2019

量子システム制御理論の面白さと難しさ
大木健太郎
真なるダイナミクスの追求による次世代システム制御理論調査研究委員会次世代システム制御理論への挑戦, 20 Apr. 2019, Invited

フィードバック制御による量子アニーリング計算精度の向上に向けて
大木健太郎
第６回計測自動制御学会制御部門マルチシンポジウム, 09 Mar. 2019

Quantum communication
Kentaro Ohki
SICE Annual Conference, 11 Sep. 2018, Invited

A convergence rate analysis of the continuous time replica exchange method
Kentaro Ohki; Masayuki Ohzeki
The 2015 Autumn Meeting, The Physical Society of Japan, 17 Sep. 2015

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
江波祥樹; 大木健太郎
第9回制御部門マルチシンポジウム, 10 Mar. 2022

A proposal of adaptive parameter tuning for robust stabilizing control of N-level quantum angular momentum systems
Shoju Enami; Kentaro Ohki
The 60th Conference on Decision and Control (CDC2021), 14 Dec. 2021

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
渡辺陵真; 大木健太郎
第64回自動制御連合講演会, 14 Nov. 2021

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
江波祥樹; 大木健太郎
第64回自動制御連合講演会, 13 Nov. 2021

On Recursive Quantum State Smoothing
Kentaro Ohki
The 53rd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS’21), 30 Oct. 2021, Invited

Comparison of Estimation Error between Two Different Low-Rank Kalman-Bucy Filters
Shuto Yamada; Kentaro Ohki
SICE Annual Conference 2021, 08 Sep. 2021

Awards

2011
The Society of Instrument and Control Engineers, 学術奨励賞・研究奨励賞

External funds: Kakenhi

融合型AIに基づくインテリアの推薦のためのユーザー嗜好感性モデルの構築
Grant-in-Aid for Scientific Research (C)
Basic Section 61060:Kansei informatics-related
Doshisha University
小野景子
From 01 Apr. 2021, To 31 Mar. 2025, Granted
感性モデル;深層学習;クラスタリング;遺伝的プログラミング;意思決定;モデル選択;インテリア推薦;感性;人工知能;重要ルール抽出
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21K12097/

Development of theory and technology for quantum error correction based on quantum control theory
Grant-in-Aid for Scientific Research (B)
Basic Section 21040:Control and system engineering-related
The University of Tokyo
津村幸治
From 01 Apr. 2020, To 31 Mar. 2023, Granted
制御理論;量子誤り訂正;量子情報理論;量子統計;量子計算理論
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H02168/

量子情報量による不確かさの特徴づけと量子系におけるロバスト制御理論の構築
Grant-in-Aid for Scientific Research (C)
Basic Section 12040:Applied mathematics and statistics-related
Kyoto University
大木健太郎
From 01 Apr. 2019, To 31 Mar. 2023, Granted
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;ロバスト制御;量子制御
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19K03619/

Performance analysis and approximation theory for quantum dynamical estimator
Grant-in-Aid for Young Scientists (B)
Kyoto University
Kentaro Ohki
From 01 Apr. 2016, To 31 Mar. 2020, Project Closed
平均場型量子フィルタ;平均場型蓄電池制御;量子スムージング;移動エントロピー;量子フィルタリング;近似フィルタ;状態推定;量子情報;制御工学;量子統計
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16K21127/

Fusion of Control/Quantum/Information Theories for Quantum Control Technology
Grant-in-Aid for Scientific Research (B)
The University of Tokyo
Koji Tsumura
From 01 Apr. 2016, To 31 Mar. 2019, Project Closed
制御工学;量子制御;量子フィルタリング理論;量子統計;量子計算;量子アニーリング;量子スムージング
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16H04382/

Control systems that utilize interaction with environmental fluctuation
Grant-in-Aid for Scientific Research (B)
Kyoto University
Kenji Kashima
From 01 Apr. 2014, To 31 Mar. 2018, Project Closed
制御工学;情報通信工学;薬学;機械学習;確率;確率論
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26289130/

A study of networked quantum/classical control via quantum channels
Grant-in-Aid for Young Scientists (B)
Kyoto University
Kentaro Ohki
From 01 Apr. 2013, To 31 Mar. 2016, Project Closed
量子ネットワーク;量子スムージング;量子推定理論;スムージング理論;量子状態推定;量子通信;ネットワーク化制御;量子フィードバック制御
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25820178/

Optical non-Gaussian state generation via quantum feedback control
Grant-in-Aid for Scientific Research (B)
The University of Tokyo
Koji Tsumura
From 01 Apr. 2013, To 31 Mar. 2017, Project Closed
制御理論;量子光学;数理物理;量子工学
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25289127/

Development of Robust Quantum Error Correction by Continuous-Time Quantum Feedback Control
Grant-in-Aid for Scientific Research (B)
Basic Section 21040:Control and system engineering-related
The University of Tokyo
津村幸治
From 01 Apr. 2023, To 31 Mar. 2026, Granted
制御理論;量子誤り訂正;量子情報理論;量子統計;量子計算理論
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23H01432/

Last Updated :2023/09/22

Education

Teaching subject(s)

From 01 Apr. 2023, To 31 Mar. 2024
Seminar on Applied Mathematics and Physics
9074, Fall, Faculty of Engineering, 2

From 01 Apr. 2023, To 31 Mar. 2024
System Analysis Laboratory
9132, Spring, Faculty of Engineering, 4

From 01 Apr. 2022, To 31 Mar. 2023
System Analysis Laboratory
9132, Spring, Faculty of Engineering, 4

From Apr. 2013, To Mar. 2014
Seminar on Applied Mathematics and Physics
Fall, 工学部

From Apr. 2013, To Mar. 2014
System Analysis Laboratory
Fall, 工学部

From Apr. 2014, To Mar. 2015
System Analysis Laboratory
Fall, 工学部

From Apr. 2015, To Mar. 2016
System Analysis Laboratory
Fall, 工学部

From Apr. 2015, To Mar. 2016
Seminar on Applied Mathematics and Physics
Fall, 工学部

From Apr. 2016, To Mar. 2017
System Analysis Laboratory
Fall, 工学部

From Apr. 2016, To Mar. 2017
Seminar on Applied Mathematics and Physics
Fall, 工学部

From Apr. 2017, To Mar. 2018
System Analysis Laboratory
Fall, 工学部

From Apr. 2017, To Mar. 2018
Seminar on Applied Mathematics and Physics
Fall, 工学部

From Apr. 2018, To Mar. 2019
System Analysis Laboratory
Fall, 工学部

From Apr. 2018, To Mar. 2019
Seminar on Applied Mathematics and Physics
Fall, 工学部

From Apr. 2019, To Mar. 2020
System Analysis Laboratory
Fall, 工学部

From Apr. 2019, To Mar. 2020
Seminar on Applied Mathematics and Physics
Fall, 工学部

From Apr. 2020, To Mar. 2021
System Analysis Laboratory
Fall, 工学部

From Apr. 2020, To Mar. 2021
System Analysis Laboratory
Fall, 工学部

From Apr. 2021, To Mar. 2022
System Analysis Laboratory
Spring, 工学部

From Apr. 2021, To Mar. 2022
System Analysis Laboratory
Spring, 工学部

Student achievements: Awards

計測自動制御学会制御部門マルチシンポジウム賞（基礎分野）
Mitsuhiko, Shimomura, 計測自動制御学会制御部門, 09 Mar. 2022

計測自動制御学会関西支部支部長賞奨励賞
Shoju Enami, The Society of Instrument and Control Engineers, Kansai Chapter, 07 Jan. 2022

Finalists of SICE Annual Conference Young Author’s Award
Shoju Enami, The Society of Instrument and Control Engineers, 10 Sep. 2021

第60回システム制御情報学会奨励賞
丹保裕介, システム制御情報学会, 26 May 2016

第60回自動制御連合講演会優秀発表賞
村上正和, 計測自動制御学会, 12 Nov. 2017

Last Updated :2023/09/22

Administration

Faculty management (title, position)

From 01 Apr. 2023, To 31 Mar. 2024
システム運用WG委員

From 01 Apr. 2023, To 31 Mar. 2024
情報セキュリティWG委員

From 01 Apr. 2015, To 31 Mar. 2016
情報セキュリティWG委員会委員

From 01 Apr. 2015, To 31 Mar. 2016
システム運用WG委員会委員

From 01 Apr. 2012, To 31 Mar. 2013
図書ＷＧ委員

From 01 Apr. 2012, To 31 Mar. 2013
図書ＷＧ委員（兼任　数理コース）

From 01 Apr. 2013, To 31 Mar. 2014
図書ＷＧ委員

From 01 Apr. 2013, To 31 Mar. 2014
図書ＷＧ委員（兼任　数理コース）

From 01 Apr. 2015, To 31 Mar. 2016
情報セキュリティWG委員

From 01 Apr. 2015, To 31 Mar. 2016
システム運用WG委員

From 01 Apr. 2018, To 31 Mar. 2019
評価WG委員

From 01 Apr. 2019, To 31 Mar. 2020
広報WG委員

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Ohki, Kentaro

Basic Information

Faculty

Professional Memberships

Academic Degree

Language of Instruction

ID,URL

J-Global ID

External link

researchmap URL

Research

Research Topics, Overview of the research

Research Topics

Overview of the research

Research Interests

Research Areas

Papers

Misc.

Presentations

Awards

External funds: Kakenhi

Education

Teaching subject(s)

Student achievements: Awards

Administration

Faculty management (title, position)

Academic, Social Contribution

Committee Memberships