Personnel Information

写真b

OKAMURA Takashi

Organization
School of Science Department of Physics and Astronomy Professor
Research Fields, Keywords
gravitation, cosmology, cosmology, gravitation, open quatum system, open quatum system
Teaching and Research Fields
ブラックホール時空や初期宇宙といった強い重力が関与する物理現象や，量子系の古典化現象（どのような条件下で量子系が古典力学で良く記述されるか）に興味をもち，その理論的研究を行っています．
　最近では，（1）ブラックホールの熱力学的性質（その質量で定まる温度でホーキング熱輻射をし，エントロピーをもつなど）の基礎付けに関する問題を，超弦理論にもとづいて再考すること（2）ゲージ／重力対応とよばれる超弦理論の予言（核力と重力との間には対応があるという予想）を利用して，核力の難しい問題を重力で理解すること，また逆に，重力の難しい問題を核力で理解することなどに興味をもって研究を進めています．
Mail Address
cosmology_kg@yahoo.co.jp
Syllabus information URL
https://syllabus.kwansei.ac.jp/uniasv2/UnSSOLoginControlFree?REQ_ACTION_DO=/AGA030PLS01Action.do?REQ_FUNCTION_JUMP_START_FLG=1&SLB_LINK_DISP_FLG=24&TCH_NO=020050&REQ_PRFR_FUNC_ID=AGA030
SDGs Related Goals
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Graduating School 【 display / non-display 】

  • Graduating School:Tohoku University
    Faculty:Faculty of Science
    Course / Major:物理学第二学科

    Kind of school:University
    Date of graduation:1989.03
    Completion status:Graduated
    Country location code:Japan

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Graduate School 【 display / non-display 】

  • Graduate school:Kyoto University
    Department:Graduate School, Division of Natural Science
    Course:物理学第二専攻

    Course completed:Doctor's Course
    Date of completion:1994.03
    Completion status:Completed
    Country:Japan

  • Graduate school:Kyoto University
    Department:Graduate School, Division of Natural Science
    Course:物理学第二専攻

    Course completed:Master's Course
    Date of completion:1991.03
    Completion status:Completed
    Country:Japan

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Degree 【 display / non-display 】

  • Degree name:博士（理学）
    Classified degree field:Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
    Conferring institution:Kyoto University
    Acquisition way:Coursework
    Date of acquisition:1994.03

  • Degree name:理学修士
    Classified degree field:Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
    Conferring institution:Kyoto University
    Acquisition way:Coursework
    Date of acquisition:1991.03

  • Degree name:理学士
    Classified degree field:Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
    Conferring institution:Tohoku University
    Acquisition way:Coursework
    Date of acquisition:1989.03

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Career 【 display / non-display 】

  • Affiliation:Kwansei Gakuin University
    Title:Professor
    Date:2002.04 -

  • Affiliation:Kwansei Gakuin University
    Department:School of Science and Technology Department of Physics
    Title:Professor
    Date:2002.04 -

  • Affiliation:Ochanomizu University
    Department:Faculty of Science
    Title:Researcher
    Date:1999.04 - 2002.03

  • Affiliation:Tokyo Institute of Technology
    Department:理学部
    Title:Researcher
    Date:1998.04 - 1999.03

  • Affiliation:Tokyo Institute of Technology
    Department:理学部
    Title:Special researcher of the Japan Society for the Promotion of Science
    Date:1995.04 - 1998.03

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Association Memberships 【 display / non-display 】

  • Academic society name:日本物理学会
    Academic country located:Japan

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Research Areas 【 display / non-display 】

  • Research field:Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

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Papers 【 display / non-display 】

  • Title: The higher dimensional instabilities of AdS in holographic semiclassical gravity
    Journal name: Journal of High Energy Physics  vol.2025  (4)
    Date of publication: 2025.04
    Author(s): Akihiro Ishibashi, Kengo Maeda, Takashi Okamura

    DOI: 10.1007/JHEP04(2025)167
    Type of publication: Research paper (scientific journal)

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  • Language: English
    Title: Symmetry breaking of 3-dimensional AdS in holographic semiclassical gravity
    Journal name: Journal of High Energy Physics  vol.2024  (2)
    Date of publication: 2024.02
    Author(s): Akihiro Ishibashi, Kengo Maeda, Takashi Okamura

    DOI: 10.1007/JHEP02(2024)146
    Type of publication: Research paper (scientific journal)

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  • Title: Pole skipping as missing states
    Journal name: Physical Review D  vol.108  (p.106006 - )
    Date of publication: 2023.11
    Author(s): Makoto Natsuume and Takashi Okamura

    Type of publication: Research paper (scientific journal)

  • Title: Pole skipping in a non-black-hole geometry
    Journal name: Physical Review D  vol.108  (p.046012 - )
    Date of publication: 2023.08
    Author(s): Makoto Natsuume and Takashi Okamura

    Type of publication: Research paper (scientific journal)

  • Title: Semiclassical Einstein equations from holography and boundary dynamics
    Journal name: Journal of High Energy Physics  vol.2023  (5)
    Date of publication: 2023.05
    Author(s): Akihiro Ishibashi, Kengo Maeda, Takashi Okamura

    DOI: 10.1007/JHEP05(2023)212
    Type of publication: Research paper (scientific journal)

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Books 【 display / non-display 】

  • Language: Japanese
    Title: 相対論と宇宙の事典
    Publisher: 朝倉書店
    Date of publication: 2020.06
    Author(s): 安東正樹 ，白水徹也 編集幹事／浅田秀樹 ，石橋明浩 ，小林努 ，真貝寿明 ，早田次郎 ，谷口敬介 編

    Type of books: Dictionary, encyclopedia
    Area of responsibility: 3.9節 ブラックホールの準固有振動，3.10節 ホーキング放射
    Authorship：Contributor
    Field of experts:Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics, Natural Science / Astronomy

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MISC 【 display / non-display 】

  • Language：Japanese
    Title:ブラックホールでクォークをみる
    Journal name:K.G.TODAY
    Date of publication:2010.12
    Author(s):岡村 隆, Takashi Okamura

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Research Projects 【 display / non-display 】

  • Research category:Grant-in-Aid for Scientific Research(C)
    Project year：2017.04 - 2022.03
    Title:AdS/CFT双対性による非平衡ダイナミクス

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  • Research category:基盤研究(C)
    Project year：2017.04 - 2022.03
    Title:AdS/CFT双対性による非平衡ダイナミクス
    Awarding organization：日本学術振興会
    System name：科学研究費助成事業

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  • Research category:Grant-in-Aid for Scientific Research(C)
    Project year：2011.04 - 2017.03
    Title:超弦理論の現実的な強結合系への応用

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  • Research category:Grant-in-Aid for Scientific Research(C)
    Project year：2008.04 - 2011.03
    Title:超弦理論によるクォーク・グルーオン・プラズマの物理

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  • Research category:Grant-in-Aid for Scientific Research(B)
    Project year：2006.04 - 2009.03
    Title:長距離相互作用系の非平衡統計熱力学の構築

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Presentations 【 display / non-display 】

  • Language:Japanese
    Conference name:集中講義
    International/Domestic presentation:Domestic presentation
    Holding date：2012.10 - 2012.11
    Title:集中講義『曲がった時空上の量子場』入門
    Presentation type:Oral presentation (general)

  • Language:Japanese
    Conference name:集中講義
    International/Domestic presentation:Domestic presentation
    Holding date：2010.03
    Title:集中講義「重力屋のためのゲージ／重力対応入門」
    Presentation type:Oral presentation (general)

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Teaching Experience (Off-campus) 【 display / non-display 】

  • Subject：関数論
    Institution name：Kwansei Gakuin University

  • Subject：基礎物理学 A
    Institution name：Kwansei Gakuin University

  • Subject：基礎物理学演習
    Institution name：Kwansei Gakuin University

  • Subject：物理学演習
    Institution name：Kwansei Gakuin University

  • Subject：特殊相対論
    Institution name：Kwansei Gakuin University

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