TAMAOKA Kotaro

College of Humanities and Sciences Department of PhysicsAssociate Professor

Degree

  • Doctor of Philosophy, The University of Osaka, Mar. 2019

Research Keyword

  • 素粒子論

Field Of Study

  • Natural sciences, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

Career

  • Apr. 2025 - Present
    Nihon University, College of Humanities and Sciences Department of Physics, Associate Professor
  • Apr. 2021 - Mar. 2025
    Nihon University, College of Humanities and Sciences Department of Physics, Assistant Professor
  • Apr. 2019 - Mar. 2021
    Yukawa Institute for Theoretical Physics, 素粒子論, It from Qubit Postdoctoral Fellow

Educational Background

  • Apr. 2016 - Mar. 2019
    大阪大学大学院, 理学研究科, 物理学専攻 博士後期課程
  • Apr. 2014 - Mar. 2016
    大阪大学大学院, 理学研究科, 物理学専攻 博士前期課程

Award

  • 2026
    21st Particle Physics Medal: Young Scientist Award in Theoretical Particle Physics
  • 日本物理学会, Young Scientist Award of the Physical Society of Japan, 2020

Paper

  • Black Holes as a Multipartite Entanglers: Multientropy in AdS3/CFT2
    Takanori Anegawa; Shota Suzuki; Kotaro Tamaoka
    Progress of Theoretical and Experimental Physics, Mar. 2026, Refereed
  • Holographic Absolutely Maximally Entangled States in Black Hole Interiors
    Takanori Anegawa; Kotaro Tamaoka
    Physical Review Letters, Dec. 2025, Refereed
  • Non-equilibrating a black hole with inhomogeneous quantum quench
    Kanato Goto; Masahiro Nozaki; Shinsei Ryu; Kotaro Tamaoka; Mao Tian Tan
    Journal of High Energy Physics, Aug. 2025, Refereed
  • Black hole singularity and timelike entanglement
    Takanori Anegawa; Kotaro Tamaoka
    Journal of High Energy Physics, Oct. 2024, Refereed
  • Hawking-Page and entanglement phase transition in 2d CFT on curved backgrounds
    Akihiro Miyata; Masahiro Nozaki; Kotaro Tamaoka; Masataka Watanabe
    Journal of High Energy Physics, Aug. 2024, Refereed
  • Efficient simulation of low-temperature physics in one-dimensional gapless systems
    Yuya Kusuki; Kotaro Tamaoka; Zixia Wei; Yasushi Yoneta
    Physical Review B, Jul. 2024, Refereed
  • Local operator quench induced by two-dimensional inhomogeneous and homogeneous CFT Hamiltonians
    Weibo Mao; Masahiro Nozaki; Kotaro Tamaoka; Mao Tian Tan
    Journal of High Energy Physics, Jul. 2024, Refereed
  • Inhomogeneous quenches as state preparation in two-dimensional conformal field theories
    Masahiro Nozaki; Kotaro Tamaoka; Mao Tian Tan
    Physical Review D, Jun. 2024, Refereed
  • Scrambling and recovery of quantum information in inhomogeneous quenches in two-dimensional conformal field theories
    Kanato Goto; Masahiro Nozaki; Shinsei Ryu; Kotaro Tamaoka; Mao Tian Tan
    Physical Review Research, Apr. 2024, Refereed
  • Spatial deformation of many-body quantum chaotic systems and quantum information scrambling
    Kanato Goto; Taozhi Guo; Tomoki Nosaka; Masahiro Nozaki; Shinsei Ryu; Kotaro Tamaoka
    Physical Review B, Feb. 2024, Refereed
  • Entanglement dynamics of the non-unitary holographic channel
    Kanato Goto; Masahiro Nozaki; Kotaro Tamaoka and Mao Tian Tan
    Journal of High Energy Physics, Mar. 2023, Refereed
  • Page curve and symmetries
    Pak Hang Chris Lau; Toshifumi Noumi; Yuhei Takii and Kotaro Tamaoka
    Journal of High Energy Physics, Oct. 2022, Refereed
  • Notes on pseudo entropy amplification
    Yutaka Ishiyama; Riku Kojima; Sho Matsui; Kotaro Tamaoka
    Progress of Theoretical and Experimental Physics, Aug. 2022, Refereed
  • Information scrambling versus quantum revival through the lens of operator entanglement
    Kanato Goto; Ali Mollabashi; Masahiro Nozaki; Kotaro Tamaoka; Mao Tian Tan
    Journal of High Energy Physics, Jun. 2022, Refereed
  • Subregion spectrum form factor via pseudoentropy
    Kanato Goto; Masahiro Nozaki; Kotaro Tamaoka
    Physical Review D, Dec. 2021, Refereed
  • Product of random states and spatial (half-)wormholes
    Kanato Goto; Yuya Kusuki; Kotaro Tamaoka; Tomonori Ugajin
    Journal of High Energy Physics, Oct. 2021, Refereed
  • Aspects of pseudoentropy in field theories
    Ali Mollabashi; Noburo Shiba; Tadashi Takayanagi; Kotaro Tamaoka; Zixia Wei
    Physical Review Research, Sep. 2021, Refereed
  • Wormholes and holographic decoherence
    Takanori Anegawa; Norihiro Iizuka; Kotaro Tamaoka; Tomonori Ugajin
    Journal of High Energy Physics, Mar. 2021, Refereed
  • Pseudo-Entropy in Free Quantum Field Theories
    Ali Mollabashi; Noburo Shiba; Tadashi Takayanagi; Kotaro Tamaoka; Zixia Wei
    Physical Review Letters, Feb. 2021, Refereed
  • New holographic generalization of entanglement entropy
    Yoshifumi Nakata; Tadashi Takayanagi; Yusuke Taki; Kotaro Tamaoka; Zixia Wei
    Physical Review D, Jan. 2021, Refereed
  • Dynamics of entanglement wedge cross section from conformal field theories
    Yuya Kusuki; Kotaro Tamaoka
    Physics Letters B, Jan. 2021, Refereed
  • A field theory study of entanglement wedge cross section: odd entropy
    Ali Mollabashi; Kotaro Tamaoka
    Journal of High Energy Physics, Aug. 2020, Refereed
  • Gravity Edges Modes and Hayward Term
    Tadashi Takayanagi; Kotaro Tamaoka
    Journal of High Energy Physics, Feb. 2020, Refereed, Not invited
  • Entanglement Wedge Cross Section from CFT: Dynamics of Local Operator Quench
    Yuya Kusuki; Kotaro Tamaoka
    JOURNAL OF HIGH ENERGY PHYSICS, Feb. 2020, Refereed, Not invited
  • Entanglement Wedge Cross Section from the Dual Density Matrix
    Kotaro Tamaoka
    PHYSICAL REVIEW LETTERS, Sep. 2018, Refereed, Not invited
  • Fermions in Geodesic Witten Diagrams
    Mitsuhiro Nishida; Kotaro Tamaoka
    JOURNAL OF HIGH ENERGY PHYSICS, May 2018, Refereed, Not invited
  • Towards Entanglement of Purification for Conformal Field Theories
    Hayato Hirai; Kotaro Tamaoka; Tsuyoshi Yokoya
    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Mar. 2018, Refereed, Not invited
  • Geodesic Witten diagrams with anti-symmetric exchange
    Kotaro Tamaoka
    PHYSICAL REVIEW D, Jul. 2017, Refereed, Not invited
  • Entanglement Entropy for 2D Gauge Theories with Matters
    Sinya Aoki; Norihiro Iizuka; Kotaro Tamaoka; Tsuyoshi Yokoya
    PHYSICAL REVIEW D, May 2017, Refereed, Not invited
  • Geodesic Witten diagrams with an external spinning field
    Mitsuhiro Nishida; Kotaro Tamaoka
    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Sep. 2016, Refereed, Not invited

MISC

  • 混合状態に対する量子情報量とホログラフィー原理
    玉岡 幸太郎; 梅本 滉嗣
    日本物理学会誌, Jun. 2020, Refereed, Invited

Lectures, oral presentations, etc.

  • Holographic AME states in black hole interiors
    Kotaro Tamaoka
    Quantum Connections: Linking Information, Gravity, and Many-Body Physics, Invited
  • Interior of Black Hole from Pseudo Entropy
    Kotaro Tamaoka
    Recent Developments in Black Holes and Quantum Gravity, Jan. 2025, Invited
  • Holography, sine-square deformation, and tensor network
    Kotaro Tamaoka
    Tensor Network States: Algorithms and Applications 2024, Invited
  • ブラックホールと量子情報
    玉岡 幸太郎
    神戸大学 物理学専攻談話会, Nov. 2024, Invited
  • ホログラフィーと量子情報
    玉岡 幸太郎
    OIST mini meeting:異分野融合による新たな科学の創造, Feb. 2024, Invited
  • Sine square deformation and black hole in AdS/CFT
    玉岡 幸太郎
    Tensor Network 2023, Invited
  • Generalized entanglement entropies based on holography
    玉岡 幸太郎
    場の理論と弦理論 2023, Invited
  • Some candidates of atypical black hole microstates
    Kotaro Tamaoka
    Recent Developments in Quantum Physics of Black Holes 2023, Invited
  • Simple toy models of (half-)wormholes
    玉岡 幸太郎
    第一回ブラックホール/量子重力勉強会, Invited
  • Non-Equilibrating a Black Hole with Inhomogeneous Quantum Quench
    Kotaro Tamaoka
    JGRG online webiner, Sep. 2022, Invited
  • 重力/アンサンブル対応
    玉岡 幸太郎
    重力理論と弦理論の新基軸, Invited
  • Pseudo entropy and its applications
    Kotaro Tamaoka
    Tensor Network States: Algorithms and Applications (TNSAA) 2021-2022 Online Workshop, Jan. 2022, Invited
  • Random States and (Half-)Wormholes
    Kotaro Tamaoka
    Kagoshima Workshop on Quantum Aspects of Gravitation, Jan. 2022, Invited
  • ワームホールは古典相関で作れるか?
    玉岡幸太郎
    第2回ブラックホール研究会, May 2021, Invited
  • Pseudo Entropy in Quantum Many-Body Systems and Holography
    Kotaro Tamaoka
    Recent progress in theoretical physics based on quantum information theory, Mar. 2021, Invited
  • 混合状態の量子もつれを測る新たな量子情報量の導入
    玉岡 幸太郎
    日本物理学会 若手奨励賞受賞記念講演 (第75回日本物理学会秋季大会), Sep. 2020, Invited
  • A new quantum information measure for mixed-state entanglement
    Kotaro Tamaoka
    Award lecture for JPS Young Scientist Award, Mar. 2020, Invited
  • A Generalized Entanglement Entropy and Holography
    Kotaro Tamaoka
    Quantum Information and String Theory 2019 (It from Qubit school/workshop), Jun. 2019, Invited
  • A Generalized Entanglement Entropy and Holography
    Kotaro Tamaoka
    One-day workshop for QFT and string theory, Nambu Symposium 2018, Dec. 2018, Invited
  • Partial Transposition & an Odd Generalization of the Entanglement Entropy
    玉岡 幸太郎
    2018年 E研夏の学校 (名古屋大学), Sep. 2018, Invited
  • Conformal blocks and AdS geometries
    Kotaro Tamaoka
    Recent Developments in Gauge Theory and String Theory, Sep. 2018, Invited

Courses

  • Nov. 2024 - Nov. 2024
  • Aug. 2023 - Aug. 2023

Affiliated academic society

  • THE PHYSICAL SOCIETY OF JAPAN

Research Themes

  • 漸近境界を超えるホログラフィーに基づく量子重力の研究
    日本学術振興会, 科学研究費助成事業, Apr. 2026 - Mar. 2031
    玉岡 幸太郎
  • 量子情報量で解き明かす量子宇宙と特異点の物理
    日本学術振興会, 科学研究費助成事業, 01 Apr. 2024 - 31 Mar. 2026
    玉岡 幸太郎
  • Quantum Information Theoretic Quantities Inspired by Quantum Gravity
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 01 Apr. 2021 - 31 Mar. 2025
    玉岡 幸太郎
  • Mesoscopic picture of black holes from quantum information
    学術変革領域研究(A), Jun. 2022 - Mar. 2024
  • Odd entropy and holography
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up, 30 Aug. 2019 - 31 Mar. 2021
    Tamaoka Kotaro