Basic Information

Faculty

• 工学部 工学部 情報学科

Professional Memberships

• 日本物理学会

Academic Degree

• 修士（理学）(名古屋大学)
• 博士（理学）(名古屋大学)

Research History

• From Apr. 1999, To Present

  Kyoto University, Graduate School of Info

Profile

• Profile

  He works in the field of Hamiltonian dynamical systems, particularly many-body systems with long-range interactions. He studies long-lasting non-equilibrium states of such systems by using statistical mechanics and kinetic theory. He found that first-order phase transition occurs in a system which has second-order phase transition only in thermal equilibrium. He actively collaborates with foreign researchers.

Language of Instruction

• English

ID,URL

• J-Global ID

  200901014917033497

• External link

  http://yang.amp.i.kyoto-u.ac.jp/~yyama/

Website(s) (URL(s))

• http://yang.amp.i.kyoto-u.ac.jp/~yyama/

researchmap URL

• https://researchmap.jp/yy_yamaguchi

Research

Research Topics, Overview of the research

• Research Topics

  Non-equilibrium statistical mechanics, Dynamics in Hamiltonian systems with many degrees of freedom

• Overview of the research

  Systems having long-range interactions are frequently trapped in long-lasting quasi-stationary states. I study the quasi-stationary states by non-equilibrium statistical mechanics, kinetic theory and so on.

Research Interests

• Coupled oscillator systems
• Kinetic theory
• Non-equilibrium statistical mechanics
• Quasi-stationary state

Research Areas

• Natural sciences, Mathematical physics and basic theory

Papers

• Stabilization of a transition state by excited vibration and impact on the reaction rate in the three-body Lennard-Jones system

  Yoshiyuki Y. Yamaguchi

  Physical Review E, 11 Feb. 2025

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• Geometric approach to Lyapunov analysis in Hamiltonian dynamics

  Yoshiyuki Y. Yamaguchi; Toshihiro Iwai

  Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Dec. 2001

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• Reconstruction of phase dynamics from macroscopic observations based on linear and nonlinear response theories

  Yoshiyuki Y. Yamaguchi; Yu Terada

  Physical Review E, 23 Feb. 2024, Peer-reviewed, Lead author, Corresponding author

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• Mode selectivity of dynamically induced conformation in many-body chainlike bead-spring models

  Yoshiyuki Y. Yamaguchi

  Physical Review E, 26 Jun. 2023, Peer-reviewed, Lead author, Last author, Corresponding author

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• Discontinuous codimension-two bifurcation in a Vlasov equation

  Yoshiyuki Y. Yamaguchi; Julien Barré

  Physical Review E, 02 May 2023, Peer-reviewed, Lead author, Corresponding author

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• Dynamically induced conformation depending on excited normal modes of fast oscillation

  Yoshiyuki Y. Yamaguchi; Tatsuo Yanagita; Tetsuro Konishi; Mikito Toda

  Physical Review E, 01 Jun. 2022, Peer-reviewed, Lead author, Corresponding author

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• Critical exponents in coupled phase-oscillator models on small-world networks

  Ryosuke Yoneda; Kenji Harada; Yoshiyuki Y. Yamaguchi

  Physical Review E, 14 Dec. 2020, Peer-reviewed, Last author

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• Towards a classification of bifurcations in Vlasov equations

  J. Barr{\'{e } }; D. M{\'{e } }tivier; Y. Y. Yamaguchi

  Physical Review E, 09 Nov. 2020, Peer-reviewed, Last author

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• Classification of bifurcation diagrams in coupled phase-oscillator models with asymmetric natural frequency distributions

  Ryosuke Yoneda; Yoshiyuki Y Yamaguchi

  Journal of Statistical Mechanics: Theory and Experiment, 11 Mar. 2020, Peer-reviewed, Last author

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• Linear response theory for coupled phase oscillators with general coupling functions

  Yu Terada; Yoshiyuki Y Yamaguchi

  Journal of Physics A: Mathematical and Theoretical, 31 Jan. 2020, Peer-reviewed, Last author

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• Critical exponents in mean-field classical spin systems

  Yoshiyuki Y. Yamaguchi; Debraj Das; Shamik Gupta

  Physical Review E, 20 Sep. 2019, Peer-reviewed, Lead author

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• Collective 1/f fluctuation by pseudo-Casimir-invariants

  Yoshiyuki Y. Yamaguchi; Kunihiko Kaneko

  Physical Review E, 27 Aug. 2018, Peer-reviewed, Lead author

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• Low-frequency discrete breathers in long-range systems without on-site potential

  Yoshiyuki Y. Yamaguchi; Yusuke Doi

  Physical Review E, 25 Jun. 2018, Peer-reviewed, Lead author

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• Nondivergent and negative susceptibilities around critical points of a long-range Hamiltonian system with two order parameters

  Yoshiyuki Y. Yamaguchi; Daiki Sawai

  PHYSICAL REVIEW E, May 2017, Peer-reviewed, Lead author

  
• Nonstandard transitions in the Kuramoto model: a role of asymmetry in natural frequency distributions

  Yu Terada; Keigo Ito; Toshio Aoyagi; Yoshiyuki Y. Yamaguchi

  JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, Jan. 2017, Peer-reviewed, Last author

  
• Strange scaling and relaxation of finite-size fluctuation in thermal equilibrium

  Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Jul. 2016, Peer-reviewed

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• Trapping scaling for bifurcations in the Vlasov systems

  J. Barre; D. Metivier; Y. Y. Yamaguchi

  PHYSICAL REVIEW E, Apr. 2016, Peer-reviewed

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• Conditions for predicting quasistationary states by rearrangement formula

  Yoshiyuki Y. Yamaguchi; Shun Ogawa

  PHYSICAL REVIEW E, Oct. 2015, Peer-reviewed

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• Nondiagonalizable and nondivergent susceptibility tensor in the Hamiltonian mean-field model with asymmetric momentum distributions

  Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Sep. 2015, Peer-reviewed

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• On the neighborhood of an inhomogeneous stable stationary solution of the Vlasov equation-Case of an attractive cosine potential

  Julien Barre; Yoshiyuki Y. Yamaguchi

  JOURNAL OF MATHEMATICAL PHYSICS, Aug. 2015, Peer-reviewed

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• Landau-like theory for universality of critical exponents in quasistationary states of isolated mean-field systems

  Shun Ogawa; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Jun. 2015, Peer-reviewed

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• 21aAJ-3 Landau theory for critical phenomena in nonequilibrium quasistationary states

  Ogawa S.; Yamaguchi Y. Y.

  Meeting Abstracts of the Physical Society of Japan, 2015

  
• Dynamical pattern formation in two-dimensional fluids and Landau pole bifurcation

  Shun Ogawa; Julien Barre; Hidetoshi Morita; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Jun. 2014, Peer-reviewed

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• Nonlinear response for external field and perturbation in the Vlasov system

  Shun Ogawa; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, May 2014, Peer-reviewed

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• Non-mean-field critical exponent in a mean-field model: Dynamics versus statistical mechanics

  Shun Ogawa; Aurelio Patelli; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Mar. 2014, Peer-reviewed

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• On algebraic damping close to inhomogeneous Vlasov equilibria in multi-dimensional spaces

  Julien Barré; Yoshiyuki Y. Yamaguchi

  Journal of Physics A: Mathematical and Theoretical, 07 Jun. 2013, Peer-reviewed

  
• Absence of thermalization for systems with long-range interactions coupled to a thermal bath

  Pierre de Buyl; Giovanni De Ninno; Duccio Fanelli; Cesare Nardini; Aurelio Patelli; Francesco Piazza; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Apr. 2013, Peer-reviewed

  
• Linear response theory in the Vlasov equation for homogeneous and for inhomogeneous quasistationary states

  Shun Ogawa; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Jun. 2012, Peer-reviewed

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• Erratum: Algebraic damping in the one-dimensional Vlasov equation (Journal of Physics A: Mathematical and Theoretical (2011) 44 (405502))

  Julien Barré; Alain Olivetti; Yoshiyuki Y Yamaguchi

  Journal of Physics A: Mathematical and Theoretical, 17 Feb. 2012, Peer-reviewed

  
• Precise determination of the nonequilibrium tricritical point based on Lynden-Bell theory in the Hamiltonian mean-field model

  Shun Ogawa; Yoshiyuki Y. Yamaguchi

  Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 22 Dec. 2011, Peer-reviewed

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• Precise determination of the nonequilibrium tricritical point based on Lynden-Bell theory in the Hamiltonian mean-field model

  Shun Ogawa; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Dec. 2011, Peer-reviewed

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• Algebraic damping in the one-dimensional Vlasov equation

  Julien Barre; Alain Olivetti; Yoshiyuki Y. Yamaguchi

  JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, Oct. 2011, Peer-reviewed

  
• Construction of traveling clusters in the Hamiltonian mean-field model by nonequilibrium statistical mechanics and Bernstein-Greene-Kruskal waves

  Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Jul. 2011, Peer-reviewed

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• Dynamics of perturbations around inhomogeneous backgrounds in the HMF model

  Julien Barre; Alain Olivetti; Yoshiyuki Y. Yamaguchi

  JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, Aug. 2010, Peer-reviewed

  
• Analytical results on the magnetization of the Hamiltonian Mean-Field model

  R. Bachelard; C. Chandre; A. Ciani; D. Fanelli; Y. Y. Yamaguchi

  PHYSICS LETTERS A, Nov. 2009, Peer-reviewed

  
• Small traveling clusters in attractive and repulsive Hamiltonian mean-field models

  Julien Barré; Yoshiyuki Y. Yamaguchi

  Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 03 Mar. 2009, Peer-reviewed

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• Small traveling clusters in attractive and repulsive Hamiltonian mean-field models

  Julien Barre; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Mar. 2009, Peer-reviewed

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• One-dimensional self-gravitating sheet model and Lynden-Bell statistics

  Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW E, Oct. 2008, Peer-reviewed

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• Nonequilibrium tricritical point in a system with long-range interactions

  Andrea Antoniazzi; Duccio Fanelli; Stefano Ruffo; Yoshiyuki Y. Yamaguchi

  PHYSICAL REVIEW LETTERS, Jul. 2007, Peer-reviewed

  
• Algebraic correlation functions and anomalous diffusion in the Hamiltonian mean field model

  Yoshiyuki Y. Yamaguchi; Freddy Bouchet; Thierry Dauxois

  JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, Jan. 2007, Peer-reviewed

  
• The Vlasov equation and the Hamiltonian mean-field model

  J Barre; F Bouchet; T Dauxois; S Ruffo; YY Yamaguchi

  PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, Jun. 2006, Peer-reviewed

  
• Non-universal finite size effects with universal infinite-size free energy

  S Goto; YY Yamaguchi

  PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, Aug. 2005, Peer-reviewed

  
• Stability criteria of the Vlasov equation and quasi-stationary states of the HMF model

  YY Yamaguchi; J Barre; F Bouchet; T Dauxois; S Ruffo

  PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, Jun. 2004, Peer-reviewed

  
• Relaxation and diffusion in a globally coupled Hamiltonian system

  YY Yamaguchi

  PHYSICAL REVIEW E, Dec. 2003, Peer-reviewed

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• Geometric approach to Lyapunov analysis in Hamiltonian dynamics

  Yoshiyuki Y. Yamaguchi; Toshihiro Iwai

  Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 2001, Peer-reviewed

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• Renormalization of the long-wavelength solution of Einstein’s equation

  Yasusada Nambu; Yoshiyuki Y. Yamaguchi

  Physical Review D, 18 Oct. 1999, Peer-reviewed

  
• Renormalization group equations and integrability in Hamiltonian systems

  YY Yamaguchi; Y Nambu

  PROGRESS OF THEORETICAL PHYSICS, Jul. 1998, Peer-reviewed

  
• New universality of Lyapunov spectra in Hamiltonian systems

  YY Yamaguchi

  JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, Jan. 1998, Peer-reviewed

  
• A geometrical model for stagnant motion in Hamiltonian systems with many degrees of freedom

  YY Yamaguchi; T Konishi

  PROGRESS OF THEORETICAL PHYSICS, Jan. 1998, Peer-reviewed

  
• Slow relaxation at critical point of second order phase transition in a highly chaotic Hamiltonian system

  YY Yamaguchi

  PROGRESS OF THEORETICAL PHYSICS, Apr. 1996, Peer-reviewed

  

Misc.

• Dynamics and statics in a class of long-range Hamiltonian systems

  GOTO S.; YAMAGUCHI Y. Y.

  Meeting abstracts of the Physical Society of Japan, 15 Aug. 2003

  
• Lyapunov Analysis on a Geometric Method (Dynamical Systems and Differential Geometry)

  Yamaguchi Y. Yoshiyuki; Iwai Toshihiro

  RIMS Kokyuroku, Dec. 2000

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• Renormalization group equations and integrability in Hamiltonian systems

  YAMAGUCHI Yoshiyuki Y.; NAMBU Yasusada

  Meeting abstracts of the Physical Society of Japan, 05 Sep. 1998

  
• Renormalization group equations and integrability in Hamiltonian systems

  NAMBU Yasusada; YAMAGUCHI Y.Yoshiyuki

  Meeting abstracts of the Physical Society of Japan, 05 Sep. 1998

  
• Renormalization group equation and chaotic orbits

  YAMAGUCHI Yoshiyuki; NAMBU Yasusada; TARUYA Atsushi; KONISHI Tetsuro

  Meeting abstracts of the Physical Society of Japan, 10 Mar. 1998

  
• 27pYC-7 Non-Universal Finite Size. Effects with Universal Infinite-Size Free Energy

  COTO S.; YAMAGUCHI Y.Y.

  Meeting abstracts of the Physical Society of Japan, 04 Mar. 2005

  
• 22pGS-1 Linear Responce Theory in Vlasov Equation and Phase Transition

  Yamaguchi Yoshiyuki Y.; Ogawa Shun

  Meeting abstracts of the Physical Society of Japan, 24 Aug. 2011

  
• 28aTC-2 Phase diagram and Landau theory in quasistationary states

  Ogawa Shun; Yamaguchi Yoshiyuki Y.

  Meeting abstracts of the Physical Society of Japan, 03 Mar. 2011

  
• Linear and Nonlinear Responses and Universality of Critical Exponents in Hamiltonian Systems with Long-Range Interaction

  S. Ogawa; Y. Y. Yamaguchi

  Chaos, Complexity and Transport (Proceedings of the CCT '15) (World Scientific, 2017) Eds. X. Leoncini, C. Eloy and G. Boedec, May 2017

  
• 19pBU-2 Phase transition of Kuramoto model with asymmetric distribution of natural frequencies

  Ito K; Terada Y; Aoyagi T; Yamaguchi Y. Y

  Meeting Abstracts of the Physical Society of Japan, 2016

  
• Landau damping and inhomogeneous reference states

  Julien Barre; Alain Olivetti; Yoshiyuki Y. Yamaguchi

  COMPTES RENDUS PHYSIQUE, Oct. 2015

  
• 8pPSA-72 Nonlinear response theory in systems with long-range interaction

  Ogawa S.; Yamaguchi Y. Y.

  Meeting abstracts of the Physical Society of Japan, 22 Aug. 2014

  
• Non-mean-field critical phenomenon in the Hamiltonian mean-field model

  Ogawa S.; Patelli A.; Yamaguchi Y.Y.

  Meeting abstracts of the Physical Society of Japan, 26 Aug. 2013

  
• Out-of-Equilibrium Statistical Mechanics in a Hamiltonian System with Mean-Field Interaction

  Yoshiyuki Y. Yamaguchi

  PROCEEDINGS OF THE THIRD UN/ESA/NASA WORKSHOP ON THE INTERNATIONAL HELIOPHYSICAL YEAR 2007 AND BASIC SPACE SCIENCE: NATIONAL ASTRONOMICAL OBSERVATORY OF JAPAN, 2010, Invited

  
• Non-universal finite size effects with universal infinite-size free energy for the alpha-XY model

  Shin-itiro Goto; Yoshiyuki Y. Yamaguchi

  PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 2006

  
• RELAXATION AND DIFFUSION IN A GLOBALLY COUPLED HAMILTONIAN SYSTEM

  Yoshiyuki Y. Yamaguchi

  GEOMETRIC STRUCTURES OF PHASE SPACE IN MULTIDIMENSIONAL CHAOS: APPLICATIONS TO CHEMICAL REACTION DYNAMICS IN COMPLEX SYSTEMS, PT B, 2005

  
• Hierarchical structure and stagnant motions in Hamilonian systems with many degrees of freedom

  Y. Y. Yamaguchi; T. Konishi

  Statistical Physics: Experiments, Theories and Computer Simulations (World Scientific, Singapore, 1998), p.225, Eds. M. Tokuyama and I. Oppenheim, 1998

  
• Second order phase transition in a highly chaotic Hamiltonian system with many degrees of freedom

  YY Yamaguchi

  INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, Apr. 1997

  
• Hamiltonian dynamics and statistics of relaxations

  Y. Y. Yamaguchi

  Complexity and Diversity'' (Springer-Verlag, Tokyo, 1997), pp.76-78 Edited by E.R.Nakamura (Editor-in-Chief), 1997

  

Presentations

• Discontinuous codimension-two bifurcation in a Vlasov equation

  Yoshiyuki Y. Yamaguchi; Julien Barré

  Japan Physical Society, Spring meeting 2023, 23 Mar. 2023

  
• Dynamical stability of conformation in many-body chain-like bead-spring models

  Yoshiyuki Y. Yamaguchi

  Japan Physical Society, Autumn meeting 2022, 12 Sep. 2022

  
• Conformation selection by fast normal modes: Case of a bead-spring model

  Yoshiyuki Y. Yamaguchi; Tatsuo Yanagita; Tetsuro Konishi; Mikito Toda

  Japan Physical Society, Annual (77th) Meeting 2022, 17 Mar. 2022

  
• Vlasov方程式における分岐の標準形

  山口義幸; n; collaboration; with J. Barré; D. Métivi

  駒場物性セミナー, 05 Nov. 2021, Invited

  
• Normal form of bifurcations in Vlasov equations

  Y. Y. Yamaguchi; J. Barré; D. Métivier

  Japan Physical Society, Autum meeting 2021, 22 Sep. 2021

  
• Singularity and Universality in Dynamical Systems with Large Degrees of Freedom

  Yoshiyuki Y. Yamaguchi

  「複雑系数理：物理・化学・生物・情報とカオス」シンポジウム, 27 Mar. 2021, Invited

  
• Non-mean-field critical exponents in classical mean-field anisotropic spin models

  Yoshiyuki Y. Yamaguchi

  2021 Annual Meeting of Japan Physical Society, 13 Mar. 2021

  
• Collective 1/f fluctuation by pseudo-Casimir-invariants

  Y. Y. Yamaguchi; K. Kaneko

  2019 Autumn Meeting of the Physical Society of Japan, 12 Sep. 2019

  
• Collective 1/f fluctuation by pseudo-Casimir-invariants

  Y. Y. Yamaguchi; K. Kaneko

  Colloquium in Department of Physics, 14 Aug. 2019, Invited

  
• Collective 1/f fluctuation by pseudo-Casimir-invariants

  Y. Y. Yamaguchi; K. Kaneko

  10th Dynamics Days Asia Pacific (DDAP10), 05 Nov. 2018, Invited

  
• Discrete breathers in long-range systems

  Y. Y. Yamaguchi; Y. Doi

  JSPS Autumn meeting, 09 Sep. 2018

  
• Finite-size fluctuation in long-range systems

  Y. Y. Yamaguchi; K. Kaneko

  International Symosium on Fluctuation and Structure out of Equilibrium 2017, Nov. 2017

  
• Finite-size fluctuation in long-range systems

  Y. Y. Yamaguchi; K. Kaneko

  Collisionless Boltzmann (Vlasov) Equation and Modeling of Self-Gravitating Systems and Plasmas, 30 Oct. 2017

  
• 三相を持つハミルトン力学系の臨界点における感受率の非発散と非正値性

  山口義幸; 澤井大基

  日本物理学会２０１７年秋季大会, 22 Sep. 2017

  
• 長距離相互作用系におけるILM

  山口義幸; 土井祐介

  第2回豊田理研研究集会, 29 Aug. 2017, Invited

  
• Discrete breather in long-range system

  山口義幸

  非線形エネルギー輸送による新しい物性理論の探求, 21 Jul. 2017

  
• 長距離相互作用ハミルトン力学系における応答理論

  山口義幸

  「非線形科学とその周辺」セミナー, 12 Dec. 2016, Invited

  
• Relaxation of finite-size fluctuation in thermal equilibrium

  Y. Y. Yamaguchi

  9th Dynamics Days Asia Pacific (DDAP9), Dec. 2016

  
• Relaxation of finite-size fluctuation in thermal equilibrium

  Y. Y. Yamaguchi

  Interdisciplinary Applications of Nonlinear Science, Nov. 2016

  
• 非平衡統計力学としての再配分公式の適用条件

  山口義幸; 小川駿

  日本物理学会2016年秋季大会, 16 Sep. 2016

  
• Relaxation of finite-size fluctuation in thermal equilibrium

  Y. Y. Yamaguchi

  Conference on Long-Range-Interacting Many Body Systems: from Atomic to Astrophysical Scales, 29 Jul. 2016

  
• 長距離相互作用系の有限サイズゆらぎ

  山口義幸

  日本物理学会第71回年次大会(2016年), 20 Mar. 2016

  
• 古典平均場系の特殊性と応用可能性

  山口義幸

  大自由度分子系における化学反応機序の理解と制御, 31 Oct. 2015, Invited

  
• Ordered and disordered states in the Hamiltonian mean-field model

  Y. Y. Yamaguchi

  Miniworkshop on nonlinear dynamical systems and control, 21 Aug. 2015

  
• Dynamics around stable stationary states in Vlasov systems

  Y. Y. Yamaguchi

  Informal seminar of Vlasov-Poisson : towards numerical methods without particles, 05 Jun. 2015

  
• Response and critical exponents in Vlasov systems

  山口義幸

  Workshop on dynamical systems and computation 2015, 05 Mar. 2015, Invited

  
• Dynamics around spatially inhomogeneous stationary states in Vlasov systems

  Y. Y. Yamaguchi

  Seminar, 20 Feb. 2015, Invited

  
• 平均場ダイナミクスにおける非線形応答と非平均場的臨界指数

  山口義幸; 小川駿

  日本物理学会 2014年秋季大会, 07 Sep. 2014

  
• Nonlinear response theory in long-range Hamiltonian systems

  Y. Y. Yamaguchi

  Workshop: Advances in Nonequilibrium Statistical Mechanics, May 2014, Invited

  
• Hamiltonian mean-field系の空間非一様安定定常解の近傍における安定性

  山口義幸; Julien Barré

  日本物理学会 第69回年次大会, 28 Mar. 2014

  
• 多体ハミルトン系における一様状態と非一様状態

  山口義幸

  研究集会「力学系・振動子系・非一様性」, 17 Mar. 2014

  
• Vlasov approach to many-body Hamiltonian dynamics

  Y. Y. Yamaguchi

  Workshop on Lagrangian Coherent Structures and Dynamical Systems, 05 Mar. 2014, Hokkaido univ., Invited

  
• Linear response theory in one-dimensional Vlasov systems

  Y. Y. Yamaguchi

  CECAM Workshop: Equilibrium and out-of-equlibrium properties of systems with long-range interactions, Aug. 2012, Invited

  
• Dynamics of Perturbation around Inhomogeneous Backgrounds in the HMF model

  Y. Y. Yamaguchi

  Dynamics Days Asia Paciffic 6 (DDAP6), Jul. 2010, Invited

  
• Out-of-equilibrum Statistical Mechanics in a Hamiltonian System with Long-range Interactions

  Y. Y. Yamaguchi

  UN/ESA/NASA Workshop on Basic Space Science and the International Heliophysical Year 2007, Jun. 2007, Invited

  
• Dependence on degrees of freedom in a long-range interaction system

  S. Goto; Y. Y. Yamaguchi

  Statistical Mechanics, Chaos and Condensed Matter Theory, Sep. 2004

  
• Relaxation and diffusion in a globally coupled Hamiltonian system

  Y. Y. Yamaguchi

  The 3rd Japan-Slovenia Seminar II, Nov. 2003, Invited

  
• Relaxation and Diffusion in a Globally Coupled Hamiltonian System

  Y. Y. Yamaguchi

  Geometrical Structure of Phase Space in Multi-Dimensional Chaos: Applications to Chemical Reaction Dynamics in Complex Systems, Oct. 2003, Invited

  
• Relaxation and diffusion in a globally coupled Hamiltonian system

  Y. Y. Yamaguchi

  School and Conference on Spatiotemporal Chaos, Jul. 2002

  
• Renormalization group equation and integrability

  Y. Y. Yamaguchi

  Celestial Mechanics, Separatrix Splitting, Diffusion, Jul. 1998

  
• Hierarchical structure and stagnant motions in Hamiltonian systems with many degrees of freedom

  Y. Y. Yamaguchi; T. Konishi

  International Meeting on Statistical Physics, Nov. 1997

  
• Second order phase transition in a highly chaotic Hamiltonian system with many degrees of freedom

  Y. Y. Yamaguchi

  The International Workshop on Nonlinear Dynamics and Chaos, Jul. 1995

  

Books and Other Publications

• 相空間のもつれた物語

  デイヴィッド・D・ノルティ著; 山口義幸訳, Single translation

  丸善, Apr. 2011, Not refereed

  

Works

• 微分方程式における繰り込み群の方法

  From 1998, To 1999

  
• Renormalization Method on Differential Equations

  From 1998, To 1999

  

External funds: others

• 多自由度ハミルトン力学系のダイナミクスに関する研究

  文部科学省長期在外研究員(若手別枠)

  From 01 Jul. 2002, To 28 Feb. 2003
• 長距離相互作用ハミルトン系のダイナミクス：凖定常状態の役割

  外国人招へい研究者(短期)

  From 22 May 2006, To 24 Jun. 2006

Education

Teaching subject(s)

• From 01 Apr. 2024, To 31 Mar. 2025

  Exercise on Applied Mathematics and Physics

  9090, Spring, Faculty of Engineering, 2
• From 01 Apr. 2024, To 31 Mar. 2025

  Seminar on Applied Mathematics and Physics

  9074, Fall, Faculty of Engineering, 2
• From 01 Apr. 2024, To 31 Mar. 2025

  Exercise on Programming

  9091, Spring, Faculty of Engineering, 2
• From 01 Apr. 2024, To 31 Mar. 2025

  Exercise on Programming

  9143, Spring, Faculty of Engineering, 4
• From 01 Apr. 2023, To 31 Mar. 2024

  Exercise on Applied Mathematics and Physics

  9090, Spring, Faculty of Engineering, 2
• From 01 Apr. 2023, To 31 Mar. 2024

  Applied Mathematics and Physics Laboratory

  9089, Fall, Faculty of Engineering, 2
• From 01 Apr. 2023, To 31 Mar. 2024

  Seminar on Applied Mathematics and Physics

  9074, Fall, Faculty of Engineering, 2
• From 01 Apr. 2023, To 31 Mar. 2024

  Applied Mathematics and Physics Laboratory

  9125, Fall, Faculty of Engineering, 4
• From 01 Apr. 2022, To 31 Mar. 2023

  Exercise on Applied Mathematics and Physics

  9090, Spring, Faculty of Engineering, 2
• From Apr. 2011, To Mar. 2012

  基礎数理演習（数理）

  Spring, 工学部
• From Apr. 2011, To Mar. 2012

  数理工学セミナー（数理）

  Fall, 工学部
• From Apr. 2012, To Mar. 2013

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2012, To Mar. 2013

  Exercise on Numerical Analysis

  Spring, 工学部
• From Apr. 2012, To Mar. 2013

  Seminar on Applied Mathematics and Physics

  Fall, 工学部
• From Apr. 2013, To Mar. 2014

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2014, To Mar. 2015

  Seminar on Applied Mathematics and Physics

  Fall, 工学部
• From Apr. 2014, To Mar. 2015

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2014, To Mar. 2015

  Advanced Study in Applied Mathematics and Physics I

  Year-long, 情報学研究科
• From Apr. 2014, To Mar. 2015

  Advanced Study in Applied Mathematics and Physics II

  Year-long, 情報学研究科
• From Apr. 2015, To Mar. 2016

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2015, To Mar. 2016

  Seminar on Applied Mathematics and Physics

  Fall, 工学部
• From Apr. 2015, To Mar. 2016

  Advanced Study in Applied Mathematics and Physics II

  Year-long, 情報学研究科
• From Apr. 2015, To Mar. 2016

  Advanced Study in Applied Mathematics and Physics I

  Year-long, 情報学研究科
• From Apr. 2016, To Mar. 2017

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2016, To Mar. 2017

  Advanced Study in Applied Mathematics and Physics II

  Year-long, 情報学研究科
• From Apr. 2016, To Mar. 2017

  Advanced Study in Applied Mathematics and Physics I

  Year-long, 情報学研究科
• From Apr. 2017, To Mar. 2018

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2017, To Mar. 2018

  Seminar on Applied Mathematics and Physics

  Fall, 工学部
• From Apr. 2017, To Mar. 2018

  Advanced Study in Applied Mathematics and Physics II

  Year-long, 情報学研究科
• From Apr. 2017, To Mar. 2018

  Advanced Study in Applied Mathematics and Physics I

  Year-long, 情報学研究科
• From Apr. 2018, To Mar. 2019

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2018, To Mar. 2019

  Seminar on Applied Mathematics and Physics

  Fall, 工学部
• From Apr. 2019, To Mar. 2020

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2020, To Mar. 2021

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2020, To Mar. 2021

  Applied Mathematics and Physics Laboratory

  Fall, 工学部
• From Apr. 2020, To Mar. 2021

  Applied Mathematics and Physics Laboratory

  Fall, 工学部
• From Apr. 2020, To Mar. 2021

  Seminar on Applied Mathematics and Physics

  Fall, 工学部
• From Apr. 2021, To Mar. 2022

  Exercise on Applied Mathematics and Physics

  Spring, 工学部
• From Apr. 2021, To Mar. 2022

  Seminar on Applied Mathematics and Physics

  Fall, 工学部

Administration

Faculty management (title, position)

• From 01 Apr. 2023, To 31 Mar. 2025

  WebサイトWG委員
• From 01 Apr. 2011, To 31 Mar. 2013

  広報ＷＧ委員
• From 01 Apr. 2011, To 31 Mar. 2013

  8号館耐震改修ＷＧ委員
• From 01 Apr. 2013, To 31 Mar. 2014

  情報セキュリティＷＧ委員
• From 01 Apr. 2013, To 31 Mar. 2014

  システム運用ＷＧ委員
• From 01 Apr. 2015, To 31 Mar. 2017

  評価ＷＧ委員
• From 01 Apr. 2018, To 31 Mar. 2019

  情報セキュリティ作業委員会委員
• From 01 Apr. 2018, To 31 Mar. 2019

  計算機小委員会委員
• From 01 Apr. 2020, To 31 Mar. 2023

  広報WG

Academic, Social Contribution

Committee Memberships

• From May 2006, To Apr. 2007

  The organizing committee of Field 11, Japan Physical Society

Academic Contribution

• -

  Planning, management, etc.

  -, From 26 Sep. 2012, To 26 Sep. 2012

  
• -

  Planning, management, etc.

  -, From Mar. 2002, To Mar. 2002

  

Social Contribution

• -

  Other

  -, From 26 Sep. 2012, To 26 Sep. 2012

  
• -

  Other

  -, From Mar. 2002, To Mar. 2002