Publications

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Peer-reviewed Papers

32. Taishi Kawamoto, Takato Mori, Yu-ki Suzuki, Tadashi Takayanagi, Tomonori Ugajin  "Holographic Local Operator Quenches in BCFTs"

JHEP 05 (2022) 060   arXiv:2203.03851

31. Kanato Goto, Yuya Kusuki, Kotaro Tamaoka and Tomonori Ugajin, “Product of random states and spatial (half-)wormholes ”  JHEP 10 (2021) 205 arXiv:2108.08308

30.  Kanato Goto, Kenta Suzuki,  Tomonori Ugajin    " Factorizing Wormholes in a Partially Disorder-Averaged SYK Model" JHEP 09 (2022) 069  arXiv:2111.11705

29.  Akihiro Miyata, Tomonori Ugajin    "Entanglement between two evaporating black holes" JHEP 09 (2022) 009   arXiv: 2111.11688 

28. Norihiro Iizuka, Akihiro Miyata, Tomonori Ugajin   "A comment on a fine-grained description of evaporating black holes with baby universes"  JHEP 09 (2022) 158  arXiv:2111.07107

27. Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin  "Entanglement between two gravitating universes"  Class. Quant. Grav. 39, no.17, 174001 (2022)

 arXiv:2104.13383  

26. Akihiro Miyata, Tomonori Ugajin  "Evaporation of black holes in flat space entangled with an auxiliary universe"  PTEP 01 (2022) 01  arXiv:2104.00183

25.  Masamichi Miyaji, Tadashi Takayanagi, Tomonori Ugajin "Spectrum of End of the World Branes in Holographic BCFTs"  JHEP 06 (2021) 023  arXiv:2103.06893

24. Takanori Anegawa, Norihiro Iizuka, Kotaro Tamaoka, Tomonori Ugajin  "Wormholes and holographic decoherence"  JHEP 03 (2021) 214  arXiv:2012.03514

23. Tomonori Ugajin  "Holographic Rényi relative divergence in JT gravity"   JHEP 05 (2021) 068  arXiv:2011.05539 

22. Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin  "Islands in de Sitter space"    JHEP 02 (2021) 072  arXiv:2008.05275 

21.  Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin  "Entanglement between two disjoint universes"  JHEP 02 (2021) 136  arXiv:2008.05274

20. Vijay Balasubramanian, Arjun Kar, Simon F. Ross, Tomonori Ugajin   "Spin structures and baby universes"  JHEP 09 (2020) 192  arXiv:2007.04333 

19.  Vijay Balasubramanian, Arjun Kar, Onkar Parrikar, Gábor Sárosi, Tomonori Ugajin "Geometric secret sharing in a model of Hawking radiation"  

JHEP 01 (2021) 177  arXiv:2003.05448 

18. Tomonori Ugajin    "Perturbative expansions of Rényi relative divergences and holography"  JHEP 06 (2020) 053  arXiv:1812.01135

17. Tadashi Takayanagi, Tomonori Ugajin, Koji Umemoto  Towards an Entanglement Measure for Mixed States in CFTs Based on Relative Entropy  JHEP 10 (2018) 166  arXiv:1807.09448

16. Yuya O. Nakagawa, Gábor Sárosi, Tomonori Ugajin  "Chaos and relative entropy"  JHEP 07 (2018) 002  arXiv:1805.01051 

15. Yuya O. Nakagawa, Tomonori Ugajin "Numerical calculations on the relative entanglement entropy in critical spin chains" J.Stat.Mech. 1709 (2017) 9, 093104  arXiv:1705.07899

14. Gábor Sárosi, Tomonori Ugajin   "Modular Hamiltonians of excited states, OPE blocks and emergent bulk fields"   JHEP 01 (2018) 012  arXiv:1705.01486

13. Tomonori Ugajin  "Mutual information of excited states and relative entropy of two disjoint subsystems in CFT"  JHEP 10 (2017) 184  arXiv:1611.03163 

12. Gábor Sárosi, Tomonori Ugajin "Relative entropy of excited states in conformal field theories of arbitrary dimensions JHEP 04 (2017) 156  arXiv:1611.02959 

11. Andrea Puhm, Francisco Rojas, Tomonori Ugajin  "(Non-adiabatic) string creation on nice slices in Schwarzschild black holes"  JHEP 04 (2017) 156   arXiv:1609.09510 

10. Gábor Sárosi, Tomonori Ugajin   "Relative entropy of excited states in two dimensional conformal field theories"   JHEP 07 (2016) 114   arXiv:1603.03057

9. Yuki Nakaguchi, Noriaki Ogawa, Tomonori Ugajin  "Holographic Entanglement and Causal Shadow in Time-Dependent Janus Black Hole"  JHEP 07 (2015) 080    arXiv:1412.8600

8. Naofumi Hama, Tatsuma Nishioka, Tomonori Ugajin   "Supersymmetric Rényi Entropy in Five Dimensions" JHEP 12 (2014) 048  arXiv:1410.2206

7. Per Kraus, Tomonori Ugajin  "An Entropy Formula for Higher Spin Black Holes via Conical Singularities" JHEP 05 (2013) 160  arXiv:1302.1583  

6. Jyotirmoy Bhattacharya, Masahiro Nozaki, Tadashi Takayanagi, Tomonori Ugajin  "Thermodynamical Property of Entanglement Entropy for Excited States"  Phys.Rev.Lett. 110 (2013) 9, 091602  arXiv:1212.1164 

5. Masahiro Nozaki, Tadashi Takayanagi, Tomonori Ugajin    "Central Charges for BCFTs and Holography"  JHEP 06 (2012) 066   arXiv:1205.1573 

4.  Jyotirmoy Bhattacharya, Noriaki Ogawa, Tadashi Takayanagi, Tomonori Ugajin  "Soliton Stars as Holographic Confined Fermi Liquids"  JHEP 02 (2012) 137   arXiv:1201.0764 

3. Noriaki Ogawa, Tadashi Takayanagi, Tomonori Ugajin   "Holographic Fermi Surfaces and Entanglement Entropy"  JHEP 01 (2012) 125   arXiv:1111.1023

2.  Shinsei Ryu, Tadashi Takayanagi, Tomonori Ugajin  "Holographic Conductivity in Disordered Systems" JHEP 04 (2011) 115   arXiv:1103.6068

1. Tadashi Takayanagi, Tomonori Ugajin  "Measuring Black Hole Formations by Entanglement Entropy via Coarse-Graining"   JHEP 11 (2010) 054  arXiv:1008.3439 

Preprints

1. Gautam Mandal, Ritam Sinha, Tomonori Ugajin  Finite size effect on dynamical entanglement entropy: CFT and holography  arXiv:1604.078307.

2. Tomonori Ugajin  "Two dimensional quantum quenches and holography"  arXiv:1311.2562

日本語記事

2.“場の量子論と量子情報−相対エントロピーとその応用” 西岡辰磨,宇賀神知紀、 日本物理学会誌（解説）、 76巻07号

1."エントロピー：物性からブラックホールまで、普遍的アプローチ" 宇賀神 知紀  数理科学 2022年 1月号

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外部資金獲得状況

6. 白眉研究費: 2020年-2024年 (年間310- 340万円)

5. 学術変革領域研究(A)極限宇宙の物理法則を創る-量子情報で拓く時空と物質の新しいパラダイム 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（研究代表者:飯塚則裕）

4. 科学研究費補助金 若手研究B : “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”　2019年- 2024年　(計325万円)

3. 日本学術振興会 海外特別研究員研究奨励金(PD 受け入れ機関：UCLA) UCSBからのオファーをアクセプトしたため、使わず。

2. 日本学術振興会 特別研究員研究奨励金(PD 受け入れ機関： 東京大学) 2014年 4月-9月

1.日本学術振興会 特別研究員奨励費(DC2); 東京大学 2012年-2014年