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Measurement/Decoherence-assisted quantum control theory

Research Project

Project/Area Number 17550019
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionKeio University

Principal Investigator

SUGAWARA Michihiko  Keio University, Faculty of Science and Technology, Assistant Professor (40276415)

Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordschemical physics / quantum control / quantum measurement / decoherence / laser
Research Abstract

Coherent control scheme using lasers is known as an efficient quantum dynamics control method. In this work, we have developed an alternative control scheme utilizing decoherence process, which is introduced by the measurement onto quantum system, together with intense laser fields. It is widely known that frequent quantum measurements can hinder or prohibit the coherent dynamics driven by the laser field, such as Rabi oscillation in two-level system. We regard the quantum measurement as an input for controlling the system and theoretically investigate how efficiently the decoherence process can be utilized in the context of quantum dynamics control. In the present work, we accept the Neumann projection postulate, i. e., a measurement process on a quantum system with respect to a certain observable can be regarded as an elimination of off-diagonal elements of the system density matrix, or so called decoherence. In the limit of continuous measurement, the process can be effectively taken into account by introducing a dephasing operator in the Liouville equation, which governs the quantum system dynamics. We have applied the theory to the population control problem of L-type three level system and Kobrac-Rice type five level system under the stationary laser fields. We have also developed a new quantum control scheme of a general multi-level system. In this scheme, the system is decomposed into two independent sub-spaces by irradiating intense CW-lasers and well- established control schemes are applied onto the isolated small-space, which consists of only 2 or 3 levels.

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (34 results)

All 2007 2006 2005 Other

All Journal Article (8 results) (of which Peer Reviewed: 4 results) Presentation (26 results)

  • [Journal Article] A New Control Scheme of Mutilevel Quantum System Based on Effective Decomposition by Intense CW Lasers2007

    • Author(s)
      M.Sugawara, M.Tamaki, and S.Yabushita
    • Journal Title

      Journal of Physical Chemistry A 111

      Pages: 9446-9453

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] A New Control Scheme of Mutilevel Quantum System Based on Effective Decomposition by Intense CW Lasers2007

    • Author(s)
      M., Sugawara, M., Tamaki, S., Yabushita
    • Journal Title

      Journal of Physical Chemistry A 111

      Pages: 9446-9453

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] A New Control Scheme of Mutilevel Quantum System Based onEffective Decomposition by Intense CW Lasers2007

    • Author(s)
      M. Sugawara, M. Tamaki, S. Yabushita
    • Journal Title

      Journal of Physical Chemistry A 111

      Pages: 9446-9453

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement-assisted quantum dynamics control of 5-level system using intense CW-laser fields2006

    • Author(s)
      M.Sugawara
    • Journal Title

      Chemical Physics Letters 428

      Pages: 457-460

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2006 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement-assisted quantum dynamics control of 5-level system using intense CW-laser fields2006

    • Author(s)
      M., Sugawara
    • Journal Title

      Chemical Physics Letters 428

      Pages: 457-460

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Quantum dynamics driven by continuous laser fields under measurements:Towards measurement-assisted quantum dynamics control2005

    • Author(s)
      M.Sugawara
    • Journal Title

      Journal of Chemical Physics 123

      Pages: 204115-204115

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Quantum dynamics driven by continuous laser fields under measurements : Towards measurement-assisted quantum dynamics control2005

    • Author(s)
      M., Sugawara
    • Journal Title

      Journal of Chemical Physics 123

      Pages: 204115-204115

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Quantum dynamics driven by continuous laser fields under measurements : Towards measurement-assisted quantum dynamics control2005

    • Author(s)
      M.Sugawara
    • Journal Title

      Journal of Chemical Physics 123

      Pages: 204115-204115

    • Related Report
      2005 Annual Research Report
  • [Presentation] 強レーザー場による空間分割を利用したデコヒーレンス制御2007

    • Author(s)
      菅原 道彦
    • Organizer
      分子科学討論会
    • Place of Presentation
      仙台、東北大
    • Year and Date
      2007-09-17
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] パルスレーザー場を用いた多準位系量子制御の断熱描像による解析2007

    • Author(s)
      常盤 浩太郎, 菅原 道彦, 藪下 聡
    • Organizer
      分子科学討論会
    • Place of Presentation
      仙台、東北大
    • Year and Date
      2007-09-17
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Decoherence control utilizing effective decomposition by intense laser fields2007

    • Author(s)
      M., Sugawara
    • Organizer
      Molecular Science Conference
    • Place of Presentation
      Sendai
    • Year and Date
      2007-09-17
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Molecular Science Conference2007

    • Author(s)
      K., Tokiwa, M., Sugawara, S., Yabushita
    • Organizer
      adiabatic picture
    • Place of Presentation
      Sendai
    • Year and Date
      2007-09-17
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 強レーザー場による空間分割を利用したデコヒーレンス制御2007

    • Author(s)
      菅原 道彦
    • Organizer
      分子科学討論会
    • Place of Presentation
      仙台・東北大
    • Year and Date
      2007-09-17
    • Related Report
      2007 Annual Research Report
  • [Presentation] 強レーザー場を用いた多準位量子系の分布動力学制御2007

    • Author(s)
      菅原 道彦, 玉木 麻耶, 藪下 聡
    • Organizer
      理論化学討論会
    • Place of Presentation
      名古屋、名大
    • Year and Date
      2007-05-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] パルス面積の概念を用いた多準位系のレーザー量子制御2007

    • Author(s)
      常盤 浩太郎, 菅原 道彦, 藪下 聡
    • Organizer
      理論化学討論会
    • Place of Presentation
      名古屋、名大
    • Year and Date
      2007-05-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Quantum control of multi-level system by intense laser fields2007

    • Author(s)
      M., Sugawara, M., Tamaki, S., Yabushita
    • Organizer
      Theoretical Chemistry Symposium
    • Place of Presentation
      Nagoya
    • Year and Date
      2007-05-14
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Quantum control of multi-level system based on the pulse-area concept2007

    • Author(s)
      K., Tokiwa, M., Sugawara, S., Yabushita
    • Organizer
      Theoretical Chemistry Symposium
    • Place of Presentation
      Nagoya
    • Year and Date
      2007-05-14
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 強レーザー場を用いた多準位量子系の分布動力学制御2007

    • Author(s)
      菅原 道彦, 玉木 麻耶, 藪下 聡
    • Organizer
      理論化学討論会
    • Place of Presentation
      名古屋・名大
    • Year and Date
      2007-05-14
    • Related Report
      2007 Annual Research Report
  • [Presentation] 観測操作と強レーザー場を利用した多準位系の分布動力学制御2006

    • Author(s)
      菅原 道彦
    • Organizer
      分子構造討論会
    • Place of Presentation
      静岡、グランシップ
    • Year and Date
      2006-09-20
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 定常レーザー場を用いた多準位系分布動力学の制御2006

    • Author(s)
      玉木 麻耶, 菅原 道彦, 藪下 聡
    • Organizer
      分子構造討論会
    • Place of Presentation
      静岡、グランシップ
    • Year and Date
      2006-09-20
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] パルス面積を用いたA型3準位系の量子制御2006

    • Author(s)
      常盤 浩太郎, 菅原 道彦, 藪下 聡
    • Organizer
      分子構造討論会
    • Place of Presentation
      静岡、グランシップ
    • Year and Date
      2006-09-20
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Population dynamics control of multi-level system using Quantum measurement and intense CW-lasers2006

    • Author(s)
      M., Sugawara
    • Organizer
      Molecular Structure Conference
    • Place of Presentation
      Shizuoka
    • Year and Date
      2006-09-20
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Population control of multi-level quantum system by CW-laser fields2006

    • Author(s)
      M., Tamaki, M., Sugawara, S., Yabushita
    • Organizer
      Molecular Structure Conference
    • Place of Presentation
      Shizuoka
    • Year and Date
      2006-09-20
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Quantum control of A-type 3-level system using pulse-area concept2006

    • Author(s)
      K., Tokiwa, M., Sugawara, S., Yabushita
    • Organizer
      Molecular Structure Conference
    • Place of Presentation
      Shizuoka
    • Year and Date
      2006-09-20
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 化学反応制御のためのレーザーパルス設計2005

    • Author(s)
      菅原 道彦
    • Organizer
      第34回制御理論シンポジウム
    • Place of Presentation
      大阪、コスモスクエア国際交流センター
    • Year and Date
      2005-11-02
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Laser pulse designing for chemical reaction control2005

    • Author(s)
      M., Sugawara
    • Organizer
      34th SICE Control Theory Symposium
    • Place of Presentation
      Osaka
    • Year and Date
      2005-11-02
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 定常レーザー場における多準位系の分布動力学の解析と制御2005

    • Author(s)
      玉木 麻耶, 菅原 道彦, 藪下 聡
    • Organizer
      分子構造討論会
    • Place of Presentation
      東京、タワーホール船堀
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 観測操作と強レーザー場を利用した量子系の準位分布制御2005

    • Author(s)
      菅原 道彦
    • Organizer
      分子構造討論会
    • Place of Presentation
      東京、タワーホール船堀
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Theoretical analysis on the population dynamics of the multi-level quantum system under CW-laser fields2005

    • Author(s)
      M., Tamaki, M., Sugawara, S., Yabushita
    • Organizer
      Molecular Structure Conference
    • Place of Presentation
      Tokyo
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Population dynamics control of quantum system using measurement and intense laser fields2005

    • Author(s)
      M., Sugawara
    • Organizer
      Molecular Structure Conference
    • Place of Presentation
      Tokyo
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 定常レーザー光を用いた準位分布制御法の設計2005

    • Author(s)
      玉木 麻耶, 菅原 道彦, 藪下 聡
    • Organizer
      理論化学討論会
    • Place of Presentation
      京都、京大
    • Year and Date
      2005-05-17
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] CW-laser designing for population dynamics control2005

    • Author(s)
      M., Tamaki, M., Sugawara, S., Yabushita
    • Organizer
      Theoretical Chemistry Symposium
    • Place of Presentation
      Kyoto
    • Year and Date
      2005-05-17
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 定常レーザー光照射下における準位分布の制御2005

    • Author(s)
      玉木 麻耶, 菅原 道彦, 藪下 聡
    • Organizer
      日本化学会春季年会
    • Place of Presentation
      横浜、神奈川大
    • Year and Date
      2005-03-28
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Population dynamics control under CW-laser fields

    • Author(s)
      M., Tamaki, M., Sugawara, S., Yabushita
    • Organizer
      88th Annual Meeting of the Chemical Society of Japan
    • Place of Presentation
      Yokohama
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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