Ugajin Tomonori 宇賀神知紀

Researcher Number	00837239
Other IDs
Affiliation (Current)	2025: 立教大学, 理学部, 准教授
Affiliation (based on the past Project Information) *help	2023 – 2025: 立教大学, 理学部, 准教授 2021 – 2022: 京都大学, 白眉センター, 特定助教 2020: 京都大学, 基礎物理学研究所, 特定助教 2019: 沖縄科学技術大学院大学, 量子重力ユニット, 研究員
Review Section/Research Field	Principal Investigator Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics Except Principal Investigator Transformative Research Areas, Section (II)
Keywords	Principal Investigator ホログラフィー原理 / 量子情報理論 / ブラックホール Except Principal Investigator ゲージ重力対応 / 弱い重力予想 / ホログラフィー / エンタングルメントエントロピー / 量子情報 / 弦理論 / ブラックホール

ブラックホールの内部構造の量子情報理論的研究Principal Investigator
- Principal Investigator
  
  宇賀神知紀
- Project Period (FY)
  2025 – 2029
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
- Research Institution
  Rikkyo University
量子情報を用いた量子ブラックホールの内部の物理学の解明
- Principal Investigator
  
  飯塚則裕
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Grant-in-Aid for Transformative Research Areas (A)
- Review Section
  
  Transformative Research Areas, Section (II)
- Research Institution
  Osaka University
共形場理論における相対エントロピーとその様々な分野への応用Principal Investigator
- Principal Investigator
  
  宇賀神知紀
- Project Period (FY)
  2019 – 2024
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
- Research Institution
  Rikkyo University
  Kyoto University
  Okinawa Institute of Science and Technology Graduate University

All 2024 2023 2022 2021 2020

All Journal Article Presentation

[Journal Article] De Sitter space is sometimes not empty2024
- Author(s)
  Vijay Balasubramanian, Yasunori Nomura & Tomonori Ugajin
- Journal Title
  
  JHEP
  
  Volume: 135 Issue: 2 Pages: 1-46
- DOI
  10.1007/jhep02(2024)135
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716, KAKENHI-PLANNED-20H05860
[Journal Article] The Petz (lite) recovery map for the scrambling channel2023
- Author(s)
  Yasuaki Nakayama, Akihiro Miyata, Tomonori Ugajin
- Journal Title
  
  PTEP
  
  Volume: 12 Issue: 12 Pages: 1-40
- DOI
  10.1093/ptep/ptad147
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Journal Article] Holographic local operator quenches in BCFTs2022
- Author(s)
  Kawamoto Taishi、Mori Takato、Suzuki Yu-ki、Takayanagi Tadashi、Ugajin Tomonori
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 05 Issue: 5 Pages: 060-060
- DOI
  10.1007/jhep05(2022)060
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PLANNED-21H05187, KAKENHI-ORGANIZER-21H05182, KAKENHI-PLANNED-21H05184, KAKENHI-PROJECT-21H04469
[Journal Article] Evaporation of black holes in flat space entangled with an auxiliary uni-verse2021
- Author(s)
  A. Miyata and T. Ugajin
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 013B13 Issue: 1 Pages: 023-023
- DOI
  10.1093/ptep/ptab163
- Open Access
- Data Source
  KAKENHI-PROJECT-19K14716
[Journal Article] Spectrum of end of the world branes in holographic BCFTs2021
- Author(s)
  Miyaji Masamichi、Takayanagi Tadashi、Ugajin Tomonori
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 2021 Issue: 6 Pages: 023-023
- DOI
  10.1007/jhep06(2021)023
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K18766, KAKENHI-PROJECT-19K14716, KAKENHI-PROJECT-21H04469
[Journal Article] Product of random states and spatial (half-)wormholes2021
- Author(s)
  K. Goto, Y. Kusuki, K. Tamaoka and T. Ugajin
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 10 Issue: 10 Pages: 5-5
- DOI
  10.1007/jhep10(2021)205
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716, KAKENHI-PROJECT-21K13920, KAKENHI-PROJECT-21K13930
[Journal Article] Wormholes and holographic decoherence2021
- Author(s)
  Anegawa Takanori、Iizuka Norihiro、Tamaoka Kotaro、Ugajin Tomonori
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 03 Issue: 3 Pages: 214-214
- DOI
  10.1007/jhep03(2021)214
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-18K03619, KAKENHI-PROJECT-19K14716, KAKENHI-PROJECT-19K23441
[Journal Article] Islands in de Sitter space2021
- Author(s)
  Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 072 Issue: 2
- DOI
  10.1007/jhep02(2021)072
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Journal Article] Geometric secret sharing in a model of Hawking radiation2021
- Author(s)
  Vijay Balasubramanian, Arjun Kar, Onkar Parrikar, Gabor S&arosi, Tomonori Ugajin
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 177(2021) Issue: 1
- DOI
  10.1007/jhep01(2021)177
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Journal Article] Entanglement between two disjoint universes2021
- Author(s)
  Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 136 Issue: 2
- DOI
  10.1007/jhep02(2021)136
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Journal Article] Spin structures and baby universes2020
- Author(s)
  Vijay Balasubramanian, Arjun Kar, Simon F. Ross, Tomonori Ugajin
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 192 Issue: 9
- DOI
  10.1007/jhep09(2020)192
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Presentation] ブラックホールの情報喪失問題とアイランド公式2023
- Author(s)
  Tomonori Ugajin
- Organizer
  日本物理学会2023年春季大会, Online
- Invited
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] Entanglement between two gravitating universes2023
- Author(s)
  Tomonori Ugajin
- Organizer
  International workshop "Qubits on the Horizon 2: Aruba 2022, DIVI VILLAGE GOLF & BEACH RESORT, Aruba
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] ブラックホールの情報喪失問題とアイランド公式2023
- Author(s)
  Tomonori Ugajin
- Organizer
  Workshop on General Relativity, Cosmology, and Black Hole Information Paradox, Nagoya University
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] ブラックホールの情報喪失問題とアイランド公式2023
- Author(s)
  Tomonori Ugajin
- Organizer
  ICEPP シンポジウム, Nagano Japan
- Invited
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] ブラックホールの情報喪失問題とアイランド公式2023
- Author(s)
  Tomonori Ugajin
- Organizer
  原子核三者夏の学校における集中講義
- Invited
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] Entanglement between two gravitating universes2023
- Author(s)
  Tomonori Ugajin
- Organizer
  International workshop "Informational architecture of spacetime, OIST
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] ER=EPR for de Sitter2023
- Author(s)
  Tomonori Ugajin
- Organizer
  Extreme universe collaboration annual meeting, Kobe
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] 相対エントロピーと重力理論2023
- Author(s)
  Tomonori Ugajin
- Organizer
  熱場の量子論, YITP
- Invited
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] ブラックホールの情報喪失問題とアイランド公式2023
- Author(s)
  宇賀神　知紀
- Organizer
  ICEPP シンポジウム
- Invited
- Data Source
  KAKENHI-PROJECT-19K14716
[Presentation] ブラックホールの情報喪失問題とアイランド公式2023
- Author(s)
  宇賀神　知紀
- Organizer
  日本物理学会2023年春季大会　招待講演
- Invited
- Data Source
  KAKENHI-PROJECT-19K14716
[Presentation] ブラックホールの情報喪失問題とアイランド公式2022
- Author(s)
  宇賀神　知紀
- Organizer
  日本大学素粒子論セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-19K14716
[Presentation] アイランド公式について2021
- Author(s)
  宇賀神知紀
- Organizer
  関西地域セミナー
- Invited
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] Entanglement between two disjoint universes2021
- Author(s)
  Tomonori Ugajin
- Organizer
  Recent developments in theoretical physics based on quantum information theory
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Presentation] Island formula and Petz map2021
- Author(s)
  宇賀神知紀
- Organizer
  Workshop on quantum information and quantum black holes
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05184
[Presentation] Entanglement between two disjoint universes2020
- Author(s)
  Tomonori Ugajin
- Organizer
  String and FIelds
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716
[Presentation] Entanglement between two disjoint universes2020
- Author(s)
  Tomonori Ugajin
- Organizer
  KEK-TH
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14716

1. 飯塚則裕 (40645462)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
2. 寺嶋靖治 (20435621)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
3. 野海俊文 (30709308)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
4. 重森正樹 (60608256)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
5. 高柳匡

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results

Ugajin Tomonori 宇賀神 知紀

Research Projects

Research Products

Co-Researchers

ブラックホールの内部構造の量子情報理論的研究Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

量子情報を用いた量子ブラックホールの内部の物理学の解明

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

共形場理論における相対エントロピーとその様々な分野への応用Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

[Journal Article] De Sitter space is sometimes not empty2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] The Petz (lite) recovery map for the scrambling channel2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Holographic local operator quenches in BCFTs2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Evaporation of black holes in flat space entangled with an auxiliary uni-verse2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Spectrum of end of the world branes in holographic BCFTs2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Product of random states and spatial (half-)wormholes2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Wormholes and holographic decoherence2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Islands in de Sitter space2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Geometric secret sharing in a model of Hawking radiation2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Entanglement between two disjoint universes2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Spin structures and baby universes2020

Author(s)

Journal Title

DOI

Data Source

[Presentation] ブラックホールの情報喪失問題とアイランド公式2023

Author(s)

Organizer

Ugajin Tomonori 宇賀神知紀