Updated on 2024/10/01

写真a

 
Ryotaku Suzuki
 
Organization
Graduate School of Engineering Department of Advanced Science and Technology Materials Science and Engineering Mathematical Physics Laboratory Commissioned Researcher   
Degree
博士（理学） （ 京都大学 ）
External link
Contact information
メールアドレス

Research Areas

  • Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics  / ブラックホール 一般相対性理論 高次元重力理論

Main research papers

Research History

  • Toyota Technological Institute   Mathematical Physics Laboratory

    2021.10

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    Country：Japan

  • University of Barcelona (Spain)   Institute of Cosmos Science   Postdoctoral Researcher

    2018.9 - 2021.9

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    Country：Spain

  • Osaka City University

    2017.9 - 2018.8

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    Country：Japan

  • Osaka University of Economics and Law

    2017.9 - 2018.8

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    Country：Japan

  • University of Portsmouth   Institute of Cosmology and Gravitation

    2016.4 - 2017.3

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    Country：United Kingdom

  • Kinki University   Faculty of Science and Engineering

    2013.9 - 2015.8

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    Country：Japan

  • Osaka City University

    2013.4 - 2021.9

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    Country：Japan

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Education

  • 京都大学大学院   理学研究科   物理学・宇宙物理学専攻

    2010.4 - 2013.3

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    Country： Japan

    Notes： 博士（理学）取得

  • 京都大学大学院   理学研究科   物理学・宇宙物理学専攻

    2007.4 - 2010.3

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    Country： Japan

    Notes： 修士（理学）取得

  • Kyoto University   Faculty of Science   Faculty of Science

    2003.4 - 2007.3

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    Country： Japan

Research theme

  • Quantum black holes

    富沢　真也, 鈴木　良拓

    2022

  • Analog black holes

    富沢　真也, 鈴木　良拓

    2022

  • Einstein-Gauss-Bonnet black holes at large D

    鈴木　良拓, 富沢　真也

    2021

  • AdS black branes at large D

    鈴木　良拓

    2021 - 2022

Papers

  • A Capped Black Hole in Five Dimensions

    Ryotaku Suzuki, Shinya Tomizawa

    e-Print   2311.11653   2023.11

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.48550/arXiv.2311.11653

  • Rotating black holes at large D in Einstein-Gauss-Bonnet theory Reviewed

    Ryotaku Suzuki, Tomizawa Shinya

    Physical Review D   106 ( 02 )   024018   2022.2

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： https://doi.org/10.1103/PhysRevD.106.024018

    DOI： https://doi.org/10.48550/arXiv.2202.12649

  • Topology-changing horizons at large D as Ricci flows Reviewed International coauthorship

    Roberto Emparan*, Ryotaku Suzuki

    Journal of High Energy Physics   07   094   2019.7 （     eISSN:1029-8479 ）

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    Abstract

    The topology-changing transition between black strings and black holes localized in a Kaluza-Klein circle is investigated in an expansion in the inverse of the number of dimensions D. Performing a new kind of large-D scaling reduces the problem to a Ricci flow of the near-horizon geometry as it varies along the circle direction. The flows of interest here simplify to a non-linear logarithmic diffusion equation, with solutions known in the literature which are interpreted as the smoothed conifold geometries involved in the transition, namely, split and fused cones, which connect to black holes and non-uniform black strings away from the conical region. Our study demonstrates the adaptability of the 1/D expansion to deal with all the regimes and aspects of the static black hole/black string system, and provides another instance of the manner in which the large D limit reduces the task of solving Einstein’s equations to a simpler but compelling mathematical problem.

    DOI： 10.1007/jhep07(2019)094

    Other Link： https://link.springer.com/article/10.1007/JHEP07(2019)094/fulltext.html

  • Evolution and End Point of the Black String Instability: Large D Solution Reviewed International coauthorship

    Roberto Emparan*, Ryotaku Suzuki, Kentaro Tanabe*

    Physical Review Letters   115 ( 9 )   091102   2015.8 （   ISSN:0031-9007   eISSN:1079-7114 ）

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    Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： 10.1103/physrevlett.115.091102

    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.115.091102/fulltext

  • Effective theory of black holes in the 1/D expansion Reviewed International coauthorship

    Roberto Emparan*, Tetsuya Shiromizu*, Ryotaku Suzuki, Kentaro Tanabe*, Takahiro Tanaka*

    Journal of High Energy Physics   06   159   2015.6 （     eISSN:1029-8479 ）

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/jhep06(2015)159

    Other Link： http://link.springer.com/content/pdf/10.1007/JHEP06(2015)159.pdf

  • The large D limit of General Relativity Reviewed

    Roberto Emparan*, Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   06   009   2013.6 （     eISSN:1029-8479 ）

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/jhep06(2013)009

    Other Link： http://link.springer.com/article/10.1007/JHEP06(2013)009/fulltext.html

  • Innermost stable circular orbits around a spinning black hole binary Reviewed

    Eiki Kagohashi, Ryotaku Suzuki, Shinya Tomizawa

    e-Print   2403.18533   2024.3

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.48550/arXiv.2403.18533

  • Solution Generation of a Capped Black Hole Reviewed

    Ryotaku Suzuki, Shinya Tomizawa

    e-Print   2403.17796   2024.3

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.48550/arXiv.2403.17796

  • Static equilibrium of multi-black holes in expanding bubbles in five dimensions" Reviewed

    Shinya Tomizawa, Ryotaku Suzuki

    e-Print   2403.16723   2024.3

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.48550/arXiv.2403.16723

  • New construction of a charged dipole black ring by the Harrison transformation Reviewed

    Ryotaku Suzuki, Shinya Tomizawa

    Physical Review D   109 ( 8 )   2024.2 （   ISSN:2470-0010   eISSN:2470-0029 ）

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevd.109.084020

    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.084020/fulltext

  • Causality of Photon Propagation under Dominant Energy Condition in Non-linear Electrodynamics Reviewed

    Shinya Tomizawa, Ryotaku Suzuki

    e-Print   2023.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.48550/arXiv.2309.10535

  • Existence conditions of nonsingular dyonic black holes in nonlinear electrodynamics Reviewed

    Ren Tsuda, Ryotaku Suzuki, Shinya Tomizawa

    e-Print   2023.8

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.48550/arXiv.2308.02146

  • Dynamics of Myers-Perry black holes with almost equal angular momenta in odd dimensions Reviewed

    Ryotaku Suzuki, Shinya Tomizawa

    arXiv   2307.00848 ( 10 )   2023.7 （     eISSN:1029-8479 ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    We investigate the nonlinear dynamics of D = 2N + 3 Myers-Perry black holes with almost equal angular momenta, which have N equal spins out of possible N + 1 spins. In particular, we study the ultraspinning instability and the fate of its nonlinear evolution using the large D effective theory approach. We find that every stationary phase can be mapped to the counterpart in the singly rotating phase within the leading order effective theory. From the known results of singly rotating solutions, we obtain the phase diagram of almost equally rotating black holes. We also obtain a certain implication for the possible topology changing transition.

    DOI： 10.48550/arXiv.2307.00848

    DOI： 10.48550/arXiv.2307.00848

    Other Link： https://link.springer.com/article/10.1007/JHEP10(2023)166/fulltext.html

  • Acoustic black and white holes of potential flow in a tube Reviewed

    Ren Tsuda*, Shinya Tomizawa, Ryotaku Suzuki

    Physical Review D   107 ( 10 )   104020   2023.3 （   ISSN:2470-0010   eISSN:2470-0029 ）

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： 10.1103/physrevd.107.104020

    DOI： https://doi.org/10.1103/PhysRevD.107.104020

    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.104020/fulltext

  • Particle motions around regular black holes Reviewed

    Kenshin Isomura*, Ryotaku Suzuki, Tomizawa Shinya

    Physical Review D   107 ( 8 )   084003 - 11   2023.1

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： https://doi.org/10.48550/arXiv.2301.10465

    DOI： https://doi.org/10.1103/PhysRevD.107.084003

  • Holographic duals of evaporating black holes Reviewed International coauthorship

    Roberto Emparan*, Raimon Luna*, Ryotaku Suzuki, Marija Tomasevic*, Benson Way*

    Journal of High Energy Physics   05   182   2023.1

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： https://doi.org/10.1007/JHEP05%282023%29182

    DOI： https://doi.org/10.48550/arXiv.2301.02587

  • Phase and stability of black strings in Einstein-Gauss-Bonnet theory at large D Reviewed

    Ryotaku Suzuki, Tomizawa Shinya

    Journal of High Energy Physics   02   101   2022.12

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)  

    DOI： https://doi.org/10.1007/JHEP02%282023%29101

    DOI： https://doi.org/10.48550/arXiv.2212.04809

  • The large D effective theory of black strings in AdS Reviewed International coauthorship

    David Licht*, Ryotaku Suzuki, Benson Way*

    Journal of High Energy Physics   12   146   2022.11

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： https://doi.org/10.1007/JHEP12%282022%29146

    DOI： https://doi.org/10.48550/arXiv.2211.04333

  • Black lens in bubble of nothing Reviewed

    Tomizawa Shinya, Ryotaku Suzuki

    Physical Review D   106 ( 12 )   124029   2022.9

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： https://doi.org/10.48550/arXiv.2209.11640

    DOI： https://doi.org/10.1103/PhysRevD.106.124029

  • Einstein-Gauss-Bonnet black strings at large α Reviewed

    Ryotaku Suzuki, Tomizawa Shinya

    Journal of High Energy Physics   09   135   2022.8

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： https://doi.org/10.48550/arXiv.2208.02497

    DOI： https://doi.org/10.1007/JHEP09%282022%29135

  • Stable bound orbits around Einstein-Gauss-Bonnet black holes Reviewed

    Ryotaku Suzuki, Tomizawa Shinya

    Physical Review D   105 ( 12 )   124014   2022.4

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： https://doi.org/10.48550/arXiv.2204.10087

    DOI： https://doi.org/10.1103/PhysRevD.105.124033

  • Stable bound orbits in microstate geometries Reviewed

    Tomizawa Shinya, Ryotaku Suzuki

    Physical Review D   105 ( 12 )   124033:1 - 8   2022.3

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： https://doi.org/10.48550/arXiv.2203.15185

    DOI： https://doi.org/10.1103/PhysRevD.105.124014

  • Lattice black branes at large D Reviewed International coauthorship

    David Licht*, Raimon Luna*, Ryotaku Suzuki

    Journal of High Energy Physics   04   063   2022.1

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)  

    DOI： https://doi.org/10.48550/arXiv.2201.11687

    DOI： https://doi.org/10.1007/JHEP04%282022%29063

  • Squashed black holes at large D Reviewed

    Ryotaku Suzuki, Shinya Tomizawa

    Journal of High Energy Physics   12 ( 12 )   194   2021.12 （     eISSN:1029-8479 ）

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    Abstract

    Using the large D effective theory approach, we construct a static solution of non-extremal and squashed black holes with/without an electric charge, which describes a spherical black hole in a Kaluza-Klein spacetime with a compactified dimension. The asymptotic background with a compactified dimension and near-horizon geometry are analytically solved by the 1/D expansion. Particularly, our work demonstrates that the large D limit can be applied to solve the non-trivial background with a compactified direction, which leads to a first-order flow equation. Moreover, we show that the extremal limit consistently reproduces the known extremal result.

    DOI： 10.1007/JHEP12(2021)194

    Other Link： https://link.springer.com/article/10.1007/JHEP12(2021)194/fulltext.html

  • Black tsunamis and naked singularities in AdS Reviewed International coauthorship

    Roberto Emparan*, David Licht*, Ryotaku Suzuki, Marija Tomesevic*, Benson Way*

    Journal of High Energy Physics   02   090   2021.12

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    Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： https://doi.org/10.48550/arXiv.2112.07967

    DOI： https://doi.org/10.1007/JHEP02%282022%29090

  • Black hole interactions at large D: brane blobology Reviewed

    Ryotaku Suzuki

    Journal of High Energy Physics   02   131   2021.2 （     eISSN:1029-8479 ）

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    Abstract

    In the large dimension (D) limit, Einstein’s equation reduces to an effective theory on the horizon surface, drastically simplifying the black hole analysis. Especially, the effective theory on the black brane has been successful in describing the non-linear dynamics not only of black branes, but also of compact black objects which are encoded as solitary Gaussian-shaped lumps, blobs. For a rigidly rotating ansatz, in addition to axisymmetric deformed branches, various non-axisymmetric solutions have been found, such as black bars, which only stay stationary in the large D limit.

    In this article, we demonstrate the blob approximation has a wider range of applicability by formulating the interaction between blobs and subsequent dynamics. We identify that this interaction occurs via thin necks connecting blobs. Especially, black strings are well captured in this approximation sufficiently away from the perturbative regime. Highly deformed black dumbbells and ripples are also found to be tractable in the approximation. By defining the local quantities, the effective force acting on distant blobs are evaluated as well. These results reveal that the large D effective theory is capable of describing not only individual black holes but also the gravitational interactions between them, as a full dynamical theory of interactive blobs, which we call brane blobology.

    DOI： 10.1007/jhep02(2021)131

    Other Link： https://link.springer.com/article/10.1007/JHEP02(2021)131/fulltext.html

  • Entropy production and entropic attractors in black hole fusion and fission Reviewed International coauthorship

    Tomás Andrade*, Roberto Emparan*, Aron Jansen*, David Licht*, Raimon Luna*, Ryotaku Suzuki

    Journal of High Energy Physics   08   098   2020.8 （     eISSN:1029-8479 ）

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    Abstract

    We study how black hole entropy is generated and the role it plays in several highly dynamical processes: the decay of unstable black strings and ultraspinning black holes; the fusion of two rotating black holes; and the subsequent fission of the merged system into two black holes that fly apart (which can occur in dimension D ≥ 6, with a mild violation of cosmic censorship). Our approach uses the effective theory of black holes at D → ∞, but we expect our main conclusions to hold at finite D. Black hole fusion is highly irreversible, while fission, which follows the pattern of the decay of black strings, generates comparatively less entropy. In 2 → 1 → 2 black hole collisions an intermediate, quasi-thermalized state forms that then fissions. This intermediate state erases much of the memory of the initial states and acts as an attractor funneling the evolution of the collision towards a small subset of outgoing parameters, which is narrower the closer the total angular momentum is to the critical value for fission. Entropy maximization provides a very good guide for predicting the final outgoing states. Along our study, we clarify how entropy production and irreversibility appear in the large D effective theory. We also extend the study of the stability of new black hole phases (black bars and dumbbells). Finally, we discuss entropy production through charge diffusion in collisions of charged black holes.

    DOI： 10.1007/jhep08(2020)098

    DOI： https://doi.org/10.48550/arXiv.2005.14498

    Other Link： https://link.springer.com/article/10.1007/JHEP08(2020)098/fulltext.html

  • Black ripples, flowers and dumbbells at large D Reviewed International coauthorship

    David Licht*, Raimon Luna*, Ryotaku Suzuki

    Journal of High Energy Physics   04   108   2020.4 （     eISSN:1029-8479 ）

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： 10.1007/jhep04(2020)108

  • Phases and stability of non-uniform black strings Reviewed International coauthorship

    Roberto Emparan*, Raimon Luna*, Marina Martínez*, Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   05   104   2018.5 （     eISSN:1029-8479 ）

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    Abstract

    We construct solutions of non-uniform black strings in dimensions fromD≈ 9 all the way up toD= ∞, and investigate their thermodynamics and dynamical stability. Our approach employs the large-Dperturbative expansion beyond the leading order, including corrections up to 1/D4. Combining both analytical techniques and relatively simple numerical solution of ODEs, we map out the ranges of parameters in which non-uniform black strings exist in each dimension and compute their thermodynamics and quasinormal modes with accuracy. We establish with very good precision the existence of Sorkin’s critical dimension and we prove that not only the thermodynamic stability, but also the dynamic stability of the solutions changes at it.

    DOI： 10.1007/jhep05(2018)104

    Other Link： https://link.springer.com/article/10.1007/JHEP05(2018)104/fulltext.html

  • Hydro-elastic complementarity in black branes at large D Reviewed International coauthorship

    Roberto Emparan*, Keisuke Izumi*, Raimon Luna*, Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   06   117   2016.6 （     eISSN:1029-8479 ）

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： 10.1007/jhep06(2016)117

  • Non-uniform black strings and the critical dimension in the 1/D expansion Reviewed

    Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   10   107   2015.10 （     eISSN:1029-8479 ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/jhep10(2015)107

  • Stationary black holes: large D analysis Reviewed

    Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   09   193   2015.9 （     eISSN:1029-8479 ）

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： 10.1007/jhep09(2015)193

    Other Link： http://link.springer.com/content/pdf/10.1007/JHEP09(2015)193.pdf

  • Quasinormal modes of (anti-)de Sitter black holes in the 1/D expansion Reviewed International coauthorship

    Roberto Emparan*, Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   04   085   2015.4 （     eISSN:1029-8479 ）

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： 10.1007/jhep04(2015)085

    Other Link： http://link.springer.com/content/pdf/10.1007/JHEP04(2015)085.pdf

  • Decoupling and non-decoupling dynamics of large D black holes Reviewed International coauthorship

    Roberto Emparan*, Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   07   113   2014.7 （     eISSN:1029-8479 ）

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： 10.1007/jhep07(2014)113

  • Instability of rotating black holes: large D analysis Reviewed International coauthorship

    Roberto Emparan*, Ryotaku Suzuki, Kentaro Tanabe*

    Journal of High Energy Physics   06   106   2014.6 （     eISSN:1029-8479 ）

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer  

    DOI： 10.1007/jhep06(2014)106

  • No-go on strictly stationary spacetimes in four/higher dimensions Reviewed

    Tetsuya Shiromizu*, Seiju Ohashi*, Ryotaku Suzuki

    Physical Review D   86 ( 6 )   064041   2012.9 （   ISSN:1550-7998   eISSN:1550-2368 ）

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society  

    DOI： 10.1103/physrevd.86.064041

    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.86.064041/fulltext

  • Caged black hole with Maxwell charge Reviewed

    Ryotaku Suzuki, Shunichiro Kinoshita*, Tetsuya Shiromizu*

    Physical Review D   86 ( 4 )   044018   2012.8 （   ISSN:1550-7998   eISSN:1550-2368 ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevd.86.044018

    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.86.044018/fulltext

  • Extreme charged black holes in a braneworld with a cosmological constant Reviewed

    Ryotaku Suzuki, Tetsuya Shiromizu*, Norihiro Tanahashi*

    Physical Review D   82 ( 8 )   085029   2010.10 （   ISSN:1550-7998   eISSN:1550-2368 ）

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：American Physical Society (APS)  

    DOI： 10.1103/physrevd.82.085029

    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.82.085029/fulltext

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MISC

  • Large D Limit of General Relativity

    Kentaro Tanabe*, Ryotaku Suzuki

    日本物理学会誌   71 ( 10 )   688 - 694   2016 （   ISSN:0029-0181 ）

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    Authorship：Last author  

    DOI： https://doi.org/10.11316/butsuri.71.10_688

Presentations

  • A capped black hole I : Solution generation of spherical black holes

    富沢真也, 鈴木良拓

    日本物理学会 2024年春季大会  ( オンライン )   2024.3 

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    Event date： 2024.3

    Presentation type：Oral presentation (general)  

  • Capped Black Hole II: non-uniqueness of spherical black holes

    鈴木良拓, 富沢真也

    日本物理学会 2024年春季大会  ( オンライン )   2024.3 

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    Event date： 2024.3

    Presentation type：Oral presentation (general)  

  • Capped Black Hole in Five Dimensions Invited

    鈴木良拓, 富沢真也

    時空と重力」研究会  ( 大阪工業大学 )   2024.3 

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    Event date： 2024.3

    Presentation type：Oral presentation (invited, special)  

  • Capped Black Hole in Five Dimensions

    鈴木良拓, 富沢真也

    「一般相対論と幾何」研究会  ( 名古屋大学 )   2024.2 

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    Event date： 2024.2

    Presentation type：Oral presentation (general)  

  • Spherical black holes with nontrivial domain of outer communication in D=5 minimal supergravity International conference

    Ryotaku Suzuki, Shinya Tomizawa

    The 32nd Workshop on General Relativity and Gravitation in Japan (JGRG32)  ( Nagoya University )   2023.11 

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    Event date： 2023.11 - 2023.12

    Language：English   Presentation type：Oral presentation (general)  

  • Phase and stability of Einstein-Gauss-Bonnet black strings at large D

    2023.3 

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    Event date： 2023.3

    Presentation type：Oral presentation (general)  

  • Effective geometry of regular black holes and photon sphere Invited International conference

    Tomizawa Shinya, Ryotaku Suzuki, Kenshin Isomura*

    The 5th workshop on "Mathematics and Physics in General Relativity"  ( 大阪公立大学 )   2023.3 

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    Presentation type：Oral presentation (invited, special)  

  • Einstein-Gauss-Bonnet Black holes at large D Invited International conference

    Ryotaku Suzuki, Tomizawa Shinya

    6th International Conference on Holography, String Theory and Spacetime in Da Nang  ( Duy Tan University, Da Nang, Vietnam )   2023.2  Duy Tan University

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    Presentation type：Oral presentation (general)  

  • Holographic dual of evaporating black holes Invited

    2023.2 

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    Presentation type：Oral presentation (invited, special)  

  • 流体ブラックホールの単純模型の提案

    津田廉*, 富沢真也, 鈴木良拓

    第23回特異点研究会「特異点と時空、および関連する物理」  ( 名古屋 )   2022.12 

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    Presentation type：Oral presentation (general)  

  • Gauss-Bonnet black strings at large D

    Ryotaku Suzuki, Shinya Tomizawa

    2022.12 

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    Event date： 2022.12

    Presentation type：Oral presentation (general)  

  • Particle motion around regular black holes

    富沢真也, 鈴木良拓, 磯村謙心*

    第23回特異点研究会「特異点と時空、および関連する物理」  ( 名古屋 )   2022.12 

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    Presentation type：Oral presentation (general)  

  • 高次元ブラックホール研究の最近の進展について 〜高次元極限法による解析的アプローチの発展〜 Invited

    鈴木良拓

    第35回理論懇シンポジウム  ( コラッセふくしま, 福島 )   2022.12  理論天文学宇宙物理学懇談会

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    Presentation type：Oral presentation (invited, special)  

  • Rotating black holes at large D in Einstein-Gauss-Bonnet theory International conference

    Ryotaku Suzuki, Shinya Tomizawa

    The 31st Workshop on General Relativity and Gravitation in Japan (JGRG31)  ( The University of Tokyo )   2022.10  Japan Society of General Relativity and Gravitation (JGRG)

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    Event date： 2022.10

    Presentation type：Oral presentation (general)  

  • A Proposal for Simple Model of Acoustic Black Hole International conference

    Ren Tsuda*, Tomizawa Shinya, Ryotaku Suzuki

    The 31st Workshop on General Relativity and Gravitation (JGRG31)  ( The University of Tokyo )   2022.10 

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    Presentation type：Oral presentation (general)  

  • Stable bound orbits around static Einstein-Gauss-Bonnet black holes

    鈴木良拓, 富沢真也

    日本物理学会2022年秋季大会  ( 岡山理科大学 )   2022.9  日本物理学会

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    Event date： 2022.9

    Presentation type：Oral presentation (general)  

  • Large coupling limit in Einstein-Gauss-Bonnet theory International conference

    Ryotaku Suzuki, Shinya Tomizawa

    Fundamental aspects of gravity  ( Imperial College London, UK )   2022.8  Theoretical Physics Group, Imperial College London

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    Event date： 2022.8

    Presentation type：Oral presentation (general)  

  • Stable bound orbits around Einstein-Gauss-Bonnet black holes International conference

    Ryotaku Suzuki, Shinya Tomizawa

    23nd International Conference on General Relativity and Gravitation (GR23)  ( ,Beijing, China [hybrid, online参加] )   2022.7 

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    Event date： 2022.7

    Presentation type：Oral presentation (general)  

  • Topology-changing horizons at large D as Ricci flow Invited

    2022.3 

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    Event date： 2022.3

    Presentation type：Oral presentation (invited, special)  

  • Squashed black holes at large D International conference

    2022.3 

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    Event date： 2022.3

    Presentation type：Oral presentation (general)  

  • Squashed black holes at large D

    鈴木良拓, 富沢真也

    第22回「特異点と時空、および関連する物理」研究会  ( オンライン )   2021.12 

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    Event date： 2021.12

    Presentation type：Oral presentation (general)  

  • Squashed black holes at large D International conference

    Ryotaku Suzuki, Shinya Tomizawa

    The 30th Workshop on General Relativity and Gravitation in Japan (JGRG30)  ( Online )   2021.12 

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    Event date： 2021.12

    Presentation type：Oral presentation (general)  

  • 高次元有効理論におけるブロブ近似 Invited

    鈴木良拓

    第3回ブラックホール研究会  ( オンライン )   2021.10  ブラックホール研究会

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    Presentation type：Oral presentation (invited, special)  

  • Large D effective theory of AdS black strings

    2021.10 

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    Presentation type：Oral presentation (general)  

  • 高次元極限における高次元ブラックホールの解析

    鈴木良拓

    集中講義  ( 豊田工業大学 )   2021.10 

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    Presentation type：Oral presentation (general)  

  • Phases and Stabilities of AdS black strings at large D

    2021.9 

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    Event date： 2021.9

    Presentation type：Oral presentation (general)  

  • Black Ripples, Dumbbells and Flowers at large D

    2021.3 

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    Event date： 2021.3

    Presentation type：Oral presentation (general)  

  • Brane blobology in large D effective theory International conference

    Ryotaku Suzuki

    online JGRG 2020  ( online )   2020.11 

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    Event date： 2020.11

    Presentation type：Oral presentation (general)  

  • 高次元有効理論におけるブロブ近似を用いたブラックホールの解析

    鈴木良拓, Roberto Emparan, Raimon Luna, David Licht, Tomás Andrade, Aron Jansen

    コロキウム（大阪市立大学）  ( 大阪市立大学 )   2020.10 

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    Presentation type：Oral presentation (general)  

  • Large D limit of General Relativity: Near-boundary structure and Ricci flow” Invited International conference

    Ryotaku Suzuki, Roberto Emparan

    Seminar (CENTRA, Lisbon)  ( Lisbon (CENTRA), Portugal )   2020.2 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Bumpy Black holes, Black Flowers and Black Dumbbells

    2019.12 

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    Event date： 2019.12

    Presentation type：Oral presentation (general)  

  • Topology-changing horizons at large D as Ricci flows

    2019.9 

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    Event date： 2019.9

    Presentation type：Oral presentation (general)  

  • Merging horizons at large D International conference

    Ryotaku Suzuki, Roberto Emparan

    22nd International Conference on General Relativity and Gravitation (GR22)  ( Valencia, Spain )   2019.7 

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    Event date： 2019.7

    Presentation type：Oral presentation (general)  

  • Topology-changing horizons at large D as Ricci flow」

    2019.6 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Topology-changing horizons at large D as Ricci flow Invited

    2019.6 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Topology-changing horizons at large D as Ricci flow Invited International conference

    Ryotaku Suzuki, Roberto Emparan

    Large D and holography workshop  ( University of Utrecht, Dutch )   2019.5 

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    Event date： 2019.5

    Presentation type：Oral presentation (invited, special)  

  • Large D limit of Conifold horizons

    2019.1 

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    Event date： 2019.1

    Presentation type：Oral presentation (general)  

  • Large D limit of Conifold horizons International conference

    Ryotaku Suzuki

    HEP-Seminar  ( University of Barcelona, Spain )   2018.12 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Kaluza-Klein Black String/Holeの高次元極限を用いた解析

    鈴木良拓

    コロキウム（大阪市立大学）  ( 大阪市立大学 )   2018.7 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • 高次元近似を用いた非一様ブラックストリングの動的および熱力学的安定性解析

    鈴木良拓, Roberto Emparan, Raimon Luna, Marina Martinez, 田邉健太朗

    日本物理学会 第73回年次大会  ( 東京理科大学 )   2018.3 

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    Event date： 2018.3

    Presentation type：Oral presentation (general)  

  • 高次元近似による非一様ブラックストリングの研究

    鈴木良拓, Roberto Emparan, Raimon Luna, Marina Martinez

    第19回特異点研究会  ( 大阪市立大学 )   2017.12 

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    Event date： 2017.12

    Presentation type：Oral presentation (general)  

  • 高次元極限におけるブラックホールダイナミクスの有効理論 Invited

    鈴木良拓, Roberto Emparan, 田邉健太朗, 泉圭介, 田中貴弘, 白水徹也

    セミナー（神戸大学）  ( 神戸大学 )   2017.10 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • 高次元極限におけるブラックホールの有効理論的解析

    鈴木良拓, Roberto Emparan, 田邉健太朗, 泉圭介

    日本物理学会 2017年秋季大会  ( 宇都宮大学 )   2017.9 

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    Event date： 2017.9

    Presentation type：Oral presentation (general)  

  • 高次元極限におけるブラックホールダイナミクスの有効理論 Invited

    鈴木良拓, Roberto Emparan, 田邉健太朗, 泉圭介, 田中貴弘, 白水徹也

    多弦セミナー  ( 名古屋大学 )   2017.6 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • 高次元極限におけるブラックホールダイナミクスの有効理論

    鈴木良拓, Roberto Emparan, 田邉健太朗

    コロキウム（大阪市立大学）  ( 大阪市立大学 )   2017.4 

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    Presentation type：Oral presentation (general)  

  • Large D Effective Theory of Gravity" International conference

    Ryotaku Suzuki, Roberto Emparan, Kentaro Tanabe, Keisuke Izumi, Raimon Luna

    Theoretical Cosmology meeting  ( University of Portsmouth, UK )   2017.3 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Large D Effective theory of Gravity Invited International conference

    Ryotaku Suzuki, Roberto Emparan, Kentaro Tanabe, Keisuke Izumi, Raimon Luna

    Friday GR Seminar  ( University of Cambridge (DAMTP), UK )   2017.3 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Large D Effective Theory International conference

    Ryotaku Suzuki, Roberto Emparan, Keisuke Izumi, Kentaro Tanabe

    Spanish-Portuguese Relativity Meeting (EREP2016)  ( Lisbon, Portugal )   2016.9 

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    Event date： 2016.9

    Presentation type：Oral presentation (general)  

  • Effective theory of Gravity in the large D limit” International conference

    [Ryotaku Suzuki, Roberto Emparan, Kentaro Tanabe, Keisuke Izumi, Raimon Luna ]

    Theoretical Cosmology meeting  ( University of Portsmouth, UK )   2016.3 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • 高次元極限におけるブラックホールのダイナミクス

    鈴木良拓

    コロキウム（大阪市立大学）  ( 大阪市立大学 )   2015.4 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Large D極限における回転ブラックホール解

    鈴木良拓, 田邉健太朗

    日本物理学会 第70回年次大会  ( 早稲田大学 )   2015.3 

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    Event date： 2015.3

    Presentation type：Oral presentation (general)  

  • Classical dynamics of the black hole horizon in the large D limit Invited International conference

    Ryotaku Suzuki, Roberto Emparan, Kentaro Tanabe, Takahiro Tanaka, Tetsuya Shiromizu

    Mathematics and Physics in General Relativity workshop  ( Osaka City University (OCAMI) )   2015.3 

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    Presentation type：Oral presentation (invited, special)  

  • Large D 極限を用いた回転ブラックホール解の探索

    鈴木良拓, 田邉健太朗

    第16回特異点研究会  ( 名古屋大学 )   2015.1 

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    Event date： 2015.1

    Presentation type：Oral presentation (general)  

  • 無限大次元から探る高次元ブラックホール解 Invited

    鈴木良拓, Roberto Emparan, 田中貴弘, 田邉健太朗, 白水徹也

    関西相対論・宇宙論合同セミナー  ( 京都大学 )   2014.12 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Derivation of higher dimensional black holes in the large D limit International conference

    Ryotaku Suzuki, Roberto Emparan, Kentaro Tanabe

    24th Workshop on General Relativity and Gravitation (JGRG24)  ( The University of Tokyo (IPMU) )   2014.11 

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    Event date： 2014.11

    Presentation type：Oral presentation (general)  

  • 次元極大極限における高次元ブラックホールの非線形解析

    鈴木良拓, 田邉健太朗, Roberto Emparan

    日本物理学会 2014年秋季大会  ( 佐賀大学 )   2014.9 

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    Event date： 2014.9

    Presentation type：Oral presentation (general)  

  • Non-perturbative analysis of the Einstein equation in the large D limit International conference

    Ryotaku Suzuki, Roberto Emparan, Kentaro Tanabe

    Spanish Relativity Meeting (ERE2014)  ( Valencia, Spain )   2014.9 

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    Event date： 2014.9

    Presentation type：Oral presentation (general)  

  • Analysis of the Einstein equation in the Large D limit

    Ryotaku Suzuki

    YITP workshop "Holographic vistas on Gravity and Strings”  ( Kyoto University (YITP) )   2014.5 

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    Event date： 2014.5

    Presentation type：Oral presentation (general)  

  • Large D limit of General Relativity

    2014.5 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • 次元極大展開を用いた高次元回転ブラックホールの安定性解析

    鈴木良拓, 田邉健太朗, Roberto Emparan

    日本物理学会 第69回年次大会  ( 東海大学 )   2014.3 

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    Event date： 2014.3

    Presentation type：Oral presentation (general)  

  • The large D limit of the Myers-Perry Black Holes

    2014.3 

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    Event date： 2014.3

    Presentation type：Oral presentation (general)  

  • 次元極大極限における高次元回転ブラックホールの不安定性

    鈴木良拓, 田邉健太朗, Roberto Emparan

    第15回特異点研究会  ( 茨城大学 )   2014.1 

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    Event date： 2014.1

    Presentation type：Oral presentation (general)  

  • Large D limitにおける高次元ブラックホールの解析

    鈴木良拓, Roberto Emparan, 田邉健太朗

    日本物理学会 2013年秋季大会  ( 高知大学 )   2013.9 

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    Event date： 2013.9

    Presentation type：Oral presentation (general)  

  • The Large D limit of General Relativity」

    2013.4 

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    Presentation type：Public lecture, seminar, tutorial, course, or other speech  

  • Analysis of Gregory-Laflamme mode in large D limit International conference

    Ryotaku Suzuki, Roberto Emparan

    RESCEU Symposium on Gravitation and General Relativity (JGRG22)  ( The University of Tokyo (RESCEU) )   2012.11 

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    Event date： 2012.11

    Presentation type：Oral presentation (general)  

  • Kaluza-Klein時空中の荷電ブラックホールの接続漸近展開(MAE)を用いた解析と有限サイズ効果

    鈴木良拓, 白水徹也, 木下俊一郎

    日本物理学会 第67回年次大会  ( 関西学院大学 )   2012.3 

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    Event date： 2012.3

    Presentation type：Oral presentation (general)  

  • The perturbative analysis of the charged caged black holes with the matched asymptotic expansion method International conference

    Ryotaku Suzuki, Tetsuya Shiromizu, Shunichiro Kinoshita

    2012 Asia Pacific School/Workshop on Cosmology and Gravitation  ( Kyoto University )   2012.3 

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    Event date： 2012.3

    Presentation type：Oral presentation (general)  

  • Matched Asymptotic Expansion with Gauge field

    2011.9 

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    Event date： 2011.9

    Presentation type：Oral presentation (general)  

  • ブレーンに局在する極限ブラックホールの研究

    鈴木良拓, 白水徹也, 棚橋典大

    日本物理学会 2010年秋季大会  ( 九州工業大学 )   2010.9 

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    Event date： 2010.9

    Presentation type：Oral presentation (general)  

  • AdS Kerr-Newman BHと相転移現象

    鈴木良拓, 早田次郎

    日本物理学会 2008年秋季大会  ( 山形大学 )   2008.9 

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    Event date： 2008.9

    Presentation type：Oral presentation (general)  

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Awards

  • 16th Nakamura Seitaro Prize

    2022.3   Topology-changing horizons at large D as Ricci flows

Grant-in-Aid for Scientific Research