Details of the Researcher

PHOTO

Yuta Murakami
Section
Institute for Materials Research
Job title
Associate Professor
Degree
e-Rad No.
70845289

Research History 5

  • 2025/01 - Present
    Tohoku University Institute for Materials Research Theory of Solid State Physics Associate Professor

  • 2022/04 - 2024/12
    RIKEN

  • 2019/04 - 2022/03
    Tokyo Institute of Technology School of Science

  • 2016/04 - 2019/03
    Fribourg大学(スイス) 物理学科 Philipp Werner研究室 ポスドク

  • 2014/04 - 2016/03
    日本学術振興会 特別研究員 (DC2)

Education 4

  • 東京大学大学院 理学系研究科物理学専攻 博士課程 青木研究室

    2013/04 - 2016/03

  • フォトサイエンス•リーディング大学院

    2011/11 - 2016/03

  • 東京大学大学院 理学系研究科物理学専攻 修士課程 青木研究室

    2011/04 - 2013/03

  • 東京大学大学院 理学部 物理学科

    2007/04 - 2011/03

Committee Memberships 3

  • ワークショップ「非平衡固体物性の最前線」 組織委員

    2023/04 - Present

  • 日本物理学会 領域5運営委員

    2023/09 - 2024/09

  • 第57回 物性若手夏の学校 講義世話人

    2011/09 - 2012/08

Professional Memberships 1

  • 日本物理学会

    2013 - Present

Research Interests 5

  • 高次高調波発生

  • 超高速現象

  • 光誘起相転移

  • 強相関電子系

  • 相関電子系

Research Areas 3

  • Natural sciences / Mathematical physics and basic theory /

  • Natural sciences / Semiconductors, optical and atomic physics /

  • Natural sciences / Magnetism, superconductivity, and strongly correlated systems /

Awards 5

  1. 第17回 日本物理学会若手奨励賞(領域5)

    2023 日本物理学会

  2. Young Researcher Award of Department of Science

    2019/12 Tokyo Institute of Technology

  3. 東京大学理学系研究科研究奨励賞

    2013/03 東京大学大学院理学系研究科

  4. 東京大学理学部学修奨励賞受賞

    2011/03 東京大学理学部

  5. 東京大学理学部長賞受賞

    2010/03 東京大学理学部

Papers 68

  1. High harmonic generation reflecting the sub-cycle evolution of the Mott transition under a mid-infrared electric field

    Hiroshi Okamoto, Ryohei Ikeda, Yuta Murakami, Daiki Sakai, Tatsuya Miyamoto, Toshimitsu Ito

    2025/09/29

    DOI: 10.21203/rs.3.rs-7287112/v1  

  2. Optical Signatures of Dynamical Excitonic Condensates

    Alexander Osterkorn, Yuta Murakami, Tatsuya Kaneko, Zhiyuan Sun, Andrew J. Millis, Denis Golež

    Physical Review Letters 2025/09/05

    DOI: 10.1103/58r8-cpzn  

  3. Photoinduced nonequilibrium states in Mott insulators

    Yuta Murakami, Denis Golež, Martin Eckstein, Philipp Werner

    Reviews of Modern Physics 2025/07/31

    DOI: 10.1103/tkjh-lr83  

  4. Charge creation via quantum tunneling in one-dimensional Mott insulators: A numerical study of the extended Hubbard model

    Thomas Hansen, Lars Bojer Madsen, Yuta Murakami

    Physical Review B 2025/07/16

    DOI: 10.1103/r15c-ymgc  

  5. Many-Body Effects on High-Harmonic Generation in Hubbard Ladders

    Yuta Murakami, Thomas Hansen, Shintaro Takayoshi, Lars Bojer Madsen, Philipp Werner

    Physical Review Letters 2025/03/07

    DOI: 10.1103/PhysRevLett.134.096504  

  6. Chirped amplitude mode in photoexcited superconductors

    Thomas Blommel, Jason Kaye, Yuta Murakami, Emanuel Gull, Denis Golež

    Physical Review B 2025/03/04

    DOI: 10.1103/PhysRevB.111.094502  

  7. High harmonic generation in altermagnets

    Philipp Werner, Markus Lysne, Yuta Murakami

    Physical Review B 2024/12/02

    DOI: 10.1103/PhysRevB.110.235101  

  8. Dynamical Exciton Condensates in Biased Electron-Hole Bilayers

    Zhiyuan Sun, Yuta Murakami, Fengyuan Xuan, Tatsuya Kaneko, Denis Golež, Andrew J. Millis

    Physical Review Letters 2024/11/22

    DOI: 10.1103/PhysRevLett.133.217002  

  9. Bulk photovoltaic effect in antiferromagnet: Role of collective spin dynamics

    Junta Iguchi, Hikaru Watanabe, Yuta Murakami, Takuya Nomoto, Ryotaro Arita

    Physical Review B 2024/02/06

    DOI: 10.1103/PhysRevB.109.064407  

  10. Energy Flow during Relaxation in an Electron–Phonon System with Multiple Modes: A Nonequilibrium Green’s Function Study

    Ken Inayoshi, Akihisa Koga, Yuta Murakami

    Journal of the Physical Society of Japan 2023/12/15

    DOI: 10.7566/JPSJ.92.124001  

  11. Efficient control of high harmonic terahertz generation in carbon nanotubes using the Aharonov-Bohm effect

    Yuta Murakami, Kohei Nagai, Akihisa Koga

    Physical Review B 2023/12/07

    DOI: 10.1103/PhysRevB.108.L241202  

  12. Nonthermal superconductivity in photodoped multiorbital Hubbard systems

    Sujay Ray, Yuta Murakami, Philipp Werner

    Physical Review B 2023/11/27

    DOI: 10.1103/PhysRevB.108.174515  

  13. Influence of Laser Intensity and Location of the Fermi Level on Tunneling Processes for High-Harmonic Generation in Arrayed Semiconducting Carbon Nanotubes Peer-reviewed

    Hiroyuki Nishidome, Mikito Omoto, Kohei Nagai, Kento Uchida, Yuta Murakami, Junko Eda, Hitomi Okubo, Kan Ueji, Yohei Yomogida, Junichiro Kono, Koichiro Tanaka, Kazuhiro Yanagi

    ACS Photonics 11 (1) 171-179 2023/11/27

    Publisher: American Chemical Society (ACS)

    DOI: 10.1021/acsphotonics.3c01244  

    ISSN: 2330-4022

    eISSN: 2330-4022

  14. Exciton-spin interactions in antiferromagnetic charge-transfer insulators

    Tatsuya Kaneko, Yuta Murakami, Denis Golež, Zhiyuan Sun, Andrew J. Millis

    Physical Review B 108 (20) 2023/11/13

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevb.108.205121  

    ISSN: 2469-9950

    eISSN: 2469-9969

  15. Suppression of heating by multicolor driving protocols in Floquet-engineered strongly correlated systems

    Yuta Murakami, Michael Schüler, Ryotaro Arita, Philipp Werner

    Physical Review B 2023/07/28

    DOI: 10.1103/PhysRevB.108.035151  

  16. Majorana gap formation in the anisotropic Kitaev model with ordered flux configuration

    Akihiro Hashimoto, Yuta Murakami, Akihisa Koga

    Physical Review B 2023/05/23

    DOI: 10.1103/PhysRevB.107.174428  

  17. Field-direction Dependence of Majorana-mediated Spin Transport

    Hirokazu Taguchi, Akihisa Koga, Yuta Murakami, Joji Nasu, Hiroki Tsuchiura

    Proceedings of the 29th International Conference on Low Temperature Physics (LT29) 2023/05/22

    Publisher: Journal of the Physical Society of Japan

    DOI: 10.7566/jpscp.38.011152  

  18. Dynamical mean-field theory for the Hubbard-Holstein model on a quantum device

    Steffen Backes, Yuta Murakami, Shiro Sakai, Ryotaro Arita

    Physical Review B 2023/04/27

    DOI: 10.1103/PhysRevB.107.165155  

  19. Multiscale Space-Time Ansatz for Correlation Functions of Quantum Systems Based on Quantics Tensor Trains

    Hiroshi Shinaoka, Markus Wallerberger, Yuta Murakami, Kosuke Nogaki, Rihito Sakurai, Philipp Werner, Anna Kauch

    Physical Review X 2023/04/27

    DOI: 10.1103/PhysRevX.13.021015  

  20. Spin, Charge, and η -Spin Separation in One-Dimensional Photodoped Mott Insulators

    Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko, Andreas M. Läuchli, Philipp Werner

    Physical Review Letters 2023/03/10

    DOI: 10.1103/PhysRevLett.130.106501  

  21. Optical Response of the Tightbinding Model on the Fibonacci Chain

    Hiroki Iijima, Yuta Murakami, Akihisa Koga

    Journal of the Physical Society of Japan 2022/12/15

    DOI: 10.7566/JPSJ.91.124702  

  22. Exploring nonequilibrium phases of photo-doped Mott insulators with generalized Gibbs ensembles

    Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko, Zhiyuan Sun, Denis Golež, Andrew J. Millis, Philipp Werner

    Communications Physics 5 (1) 2022/12

    DOI: 10.1038/s42005-021-00799-7  

    eISSN: 2399-3650

  23. Anomalous Temperature Dependence of High-Harmonic Generation in Mott Insulators Peer-reviewed

    Yuta Murakami, Kento Uchida, Akihisa Koga, Koichiro Tanaka, Philipp Werner

    Physical Review Letters 121 (5) 2022/10/03

    DOI: 10.1103/PhysRevLett.129.157401  

    ISSN: 0031-9007

    eISSN: 1079-7114

  24. Unveiling the underlying interactions in Ta2NiSe5 from photoinduced lifetime change

    Denis Golež, Sydney K. Y. Dufresne, Min-Jae Kim, Fabio Boschini, Hao Chu, Yuta Murakami, Giorgio Levy, Arthur K. Mills, Sergey Zhdanovich, Masahiko Isobe, Hidenori Takagi, Stefan Kaiser, Philipp Werner, David J. Jones, Antoine Georges, Andrea Damascelli, Andrew J. Millis

    Physical Review B 2022/09/14

    DOI: 10.1103/PhysRevB.106.L121106  

  25. Doping and gap size dependence of high-harmonic generation in graphene: Importance of consistent formulation of light-matter coupling

    Yuta Murakami, Michael Schüler

    Physical Review B 2022/07/22

    DOI: 10.1103/PhysRevB.106.035204  

  26. Scattering phenomena for spin transport in a Kitaev spin liquid

    Joji Nasu, Yuta Murakami, Akihisa Koga

    Physical Review B 106 (2) 2022/07/14

    DOI: 10.1103/PhysRevB.106.024411  

    ISSN: 2469-9950

    eISSN: 2469-9969

  27. Second-order magnetic responses in quantum magnets: Magnetization under ac magnetic fields

    Tatsuya Kaneko, Yuta Murakami, Shintaro Takayoshi, Andrew J. Millis

    Physical Review B 105 (19) 2022/05/19

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevb.105.195126  

    ISSN: 2469-9950

    eISSN: 2469-9969

  28. Thermally enhanced Majorana-mediated spin transport in the Kitaev model

    Hirokazu Taguchi, Yuta Murakami, Akihisa Koga

    Physical Review B 105 (12) 2022/03/28

    Publisher: American Physical Society ({APS})

    DOI: 10.1103/PhysRevB.105.125137  

  29. Photoinduced dynamics of a quasicrystalline excitonic insulator

    Ken Inayoshi, Yuta Murakami, Akihisa Koga

    Physical Review B 105 (10) 2022/03/25

    Publisher: American Physical Society ({APS})

    DOI: 10.1103/PhysRevB.105.104307  

  30. Light-induced hidden odd-frequency order in a model for A3C60

    Philipp Werner, Yuta Murakami

    Physical Review B 104 (18) 2021/11/04

    DOI: 10.1103/PhysRevB.104.L201101  

    ISSN: 2469-9950

    eISSN: 2469-9969

  31. Bulk Photovoltaic Effect Driven by Collective Excitations in a Correlated Insulator

    Tatsuya Kaneko, Zhiyuan Sun, Yuta Murakami, Denis Golež, Andrew J. Millis

    Physical Review Letters 127 (12) 2021/09/17

    DOI: 10.1103/PhysRevLett.127.127402  

    ISSN: 0031-9007

    eISSN: 1079-7114

  32. Role of Majorana fermions in spin transport of anisotropic Kitaev model

    Hirokazu Taguchi, Yuta Murakami, Akihisa Koga, Joji Nasu

    PHYSICAL REVIEW B 104 (12) 2021/09

    DOI: 10.1103/PhysRevB.104.125139  

    ISSN: 2469-9950

    eISSN: 2469-9969

  33. Imaging the coherent propagation of collective modes in the excitonic insulator Ta 2 NiSe 5 at room temperature

    Hope M. Bretscher, Paolo Andrich, Yuta Murakami, Denis Golež, Benjamin Remez, Prachi Telang, Anupam Singh, Luminita Harnagea, Nigel R. Cooper, Andrew J. Millis, Philipp Werner, A. K. Sood, Akshay Rao

    Science Advances 7 (28) 2021/07/09

    Publisher: American Association for the Advancement of Science ({AAAS})

    DOI: 10.1126/sciadv.abd6147  

  34. Majorana correlations in the Kitaev model with ordered-flux structures

    Akihisa Koga, Yuta Murakami, Joji Nasu

    Physical Review B 103 (21) 2021/06/10

    DOI: 10.1103/PhysRevB.103.214421  

    ISSN: 2469-9950

    eISSN: 2469-9969

  35. Photoinduced phase transition and associated timescales in the excitonic insulator Ta2NiSe5 Peer-reviewed

    Tanusree Saha, Denis Golez, Giovanni De Ninno, Jernej Mravlje, Yuta Murakami, Barbara Ressel, Matija Stupar, Primoz Rebernik Ribic

    PHYSICAL REVIEW B 103 (14) 2021/04

    DOI: 10.1103/PhysRevB.103.144304  

    ISSN: 2469-9950

    eISSN: 2469-9969

  36. Gauge invariance of light-matter interactions in first-principle tight-binding models Peer-reviewed

    Michael Schueler, Jacob A. Marks, Yuta Murakami, Chunjing Jia, Thomas P. Devereaux

    PHYSICAL REVIEW B 103 (15) 2021/04

    DOI: 10.1103/PhysRevB.103.155409  

    ISSN: 2469-9950

    eISSN: 2469-9969

  37. High-harmonic generation in one-dimensional Mott insulators

    Yuta Murakami, Shintaro Takayoshi, Akihisa Koga, Philipp Werner

    PHYSICAL REVIEW B 103 (3) 2021/01

    DOI: 10.1103/PhysRevB.103.035110  

    ISSN: 2469-9950

    eISSN: 2469-9969

  38. Nonlinear Spectroscopy of Collective Modes in an Excitonic Insulator Peer-reviewed

    Denis Golež, Zhiyuan Sun, Yuta Murakami, Antoine Georges, Andrew J. Millis

    Physical Review Letters 2020/12/18

    DOI: 10.1103/PhysRevLett.125.257601  

  39. Nonthermal excitonic condensation near a spin-state transition Peer-reviewed

    Philipp Werner, Yuta Murakami

    Physical Review B 2020/12/04

    DOI: 10.1103/PhysRevB.102.241103  

  40. NESSi: The Non-Equilibrium Systems Simulation package Peer-reviewed

    Michael Schüler, Denis Golež, Yuta Murakami, Nikolaj Bittner, Andreas Herrmann, Hugo U.R. Strand, Philipp Werner, Martin Eckstein

    Computer Physics Communications 257 2020/12

    DOI: 10.1016/j.cpc.2020.107484  

    ISSN: 0010-4655

  41. High-harmonic generation in spin-orbit coupled systems Peer-reviewed

    Markus Lysne, Yuta Murakami, Michael Schüler, Philipp Werner

    Physical Review B 102 (8) 2020/08/15

    DOI: 10.1103/PhysRevB.102.081121  

    ISSN: 2469-9950

    eISSN: 2469-9969

  42. Majorana-Mediated Spin Transport in Kitaev Quantum Spin Liquids Peer-reviewed

    Tetsuya Minakawa, Yuta Murakami, Akihisa Koga, Joji Nasu

    Physical Review Letters 125 (4) 2020/07/24

    DOI: 10.1103/PhysRevLett.125.047204  

    ISSN: 0031-9007

    eISSN: 1079-7114

  43. Excitonic Condensation Reflecting Electronic States in Two-Band Penrose–Hubbard Model Peer-reviewed

    Ken Inayoshi, Yuta Murakami, Akihisa Koga

    Journal of the Physical Society of Japan 89 (6) 064002-064002 2020/06/15

    DOI: 10.7566/JPSJ.89.064002  

    ISSN: 0031-9015

  44. Signatures of bosonic excitations in high-harmonic spectra of Mott insulators Peer-reviewed

    Markus Lysne, Yuta Murakami, Philipp Werner

    Physical Review B 101 (19) 2020/05/15

    DOI: 10.1103/PhysRevB.101.195139  

    ISSN: 2469-9950

    eISSN: 2469-9969

  45. Collective modes in excitonic insulators: Effects of electron-phonon coupling and signatures in the optical response Peer-reviewed

    Yuta Murakami, Denis GoleŽ, Tatsuya Kaneko, Akihisa Koga, Andrew J. Millis, Philipp Werner

    Physical Review B 101 (19) 2020/05/15

    DOI: 10.1103/PhysRevB.101.195118  

    ISSN: 2469-9950

    eISSN: 2469-9969

  46. Spin Transport in the Quantum Spin Liquid State in the S=1 Kitaev Model: Role of the Fractionalized Quasiparticles Peer-reviewed

    Akihisa Koga, Tetsuya Minakawa, Yuta Murakami, Joji Nasu

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 89 (3) 2020/03

    DOI: 10.7566/JPSJ.89.033701  

    ISSN: 0031-9015

  47. Ultrafast nonequilibrium evolution of excitonic modes in semiconductors Peer-reviewed

    Yuta Murakami, Michael Schüler, Shintaro Takayoshi, Philipp Werner

    Physical Review B 101 (3) 2020/01/28

    DOI: 10.1103/PhysRevB.101.035203  

    ISSN: 2469-9950

    eISSN: 2469-9969

  48. Quantum Simulation Meets Nonequilibrium Dynamical Mean-Field Theory: Exploring the Periodically Driven, Strongly Correlated Fermi-Hubbard Model Peer-reviewed

    Kilian Sandholzer, Yuta Murakami, Frederik Görg, Joaquín Minguzzi, Michael Messer, Rémi Desbuquois, Martin Eckstein, Philipp Werner, Tilman Esslinger

    Physical Review Letters 123 (19) 2019/11/08

    DOI: 10.1103/PhysRevLett.123.193602  

    ISSN: 0031-9007

    eISSN: 1079-7114

  49. High-harmonic generation in quantum spin systems Peer-reviewed

    Shintaro Takayoshi, Yuta Murakami, Philipp Werner

    Physical Review B 99 (18) 2019/05/20

    DOI: 10.1103/PhysRevB.99.184303  

    ISSN: 2469-9950

    eISSN: 2469-9969

  50. Nonequilibrium steady states of electric field driven Mott insulators Peer-reviewed

    Yuta Murakami, Philipp Werner

    Physical Review B 98 (7) 2018/08/02

    DOI: 10.1103/PhysRevB.98.075102  

    ISSN: 2469-9950

    eISSN: 2469-9969

  51. Nonthermal switching of charge order: Dynamical slowing down and optimal control Peer-reviewed

    Michael Schüler, Yuta Murakami, Philipp Werner

    Physical Review B 97 (15) 2018/04

    DOI: 10.1103/PhysRevB.97.155136  

    ISSN: 2469-9950

    eISSN: 2469-9969

  52. Enhanced pairing susceptibility in a photodoped two-orbital Hubbard model Peer-reviewed

    Philipp Werner, Hugo U.R. Strand, Shintaro Hoshino, Yuta Murakami, Martin Eckstein

    Physical Review B 97 (16) 2018/04

    DOI: 10.1103/PhysRevB.97.165119  

    ISSN: 2469-9950

    eISSN: 2469-9969

  53. Photoinduced Enhancement of Excitonic Order Peer-reviewed

    Yuta Murakami, Denis GoleŽ, Martin Eckstein, Philipp Werner

    Physical Review Letters 119 (24) 2017/12/15

    DOI: 10.1103/PhysRevLett.119.247601  

    ISSN: 0031-9007

    eISSN: 1079-7114

  54. Floquet prethermalization in the resonantly driven Hubbard model Peer-reviewed

    Andreas Herrmann, Yuta Murakami, Martin Eckstein, Philipp Werner

    EPL 120 (5) 2017/12

    DOI: 10.1209/0295-5075/120/57001  

    ISSN: 0295-5075

    eISSN: 1286-4854

  55. Nonequilibrium steady states and transient dynamics of conventional superconductors under phonon driving Peer-reviewed

    Yuta Murakami, Naoto Tsuji, Martin Eckstein, Philipp Werner

    Physical Review B 96 (4) 2017/07/19

    DOI: 10.1103/PhysRevB.96.045125  

    ISSN: 2469-9950

    eISSN: 2469-9969

  56. Nonlinear light-Higgs coupling in superconductors beyond BCS: Effects of the retarded phonon-mediated interaction Peer-reviewed

    Naoto Tsuji, Yuta Murakami, Hideo Aoki

    Physical Review B 94 (22) 2016/12/29

    DOI: 10.1103/PhysRevB.94.224519  

    ISSN: 2469-9950

    eISSN: 2469-9969

  57. Damping of the collective amplitude mode in superconductors with strong electron-phonon coupling Peer-reviewed

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    Physical Review B 94 (11) 2016/09/12

    DOI: 10.1103/PhysRevB.94.115126  

    ISSN: 2469-9950

    eISSN: 2469-9969

  58. Multiple amplitude modes in strongly coupled phonon-mediated superconductors Peer-reviewed

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    Physical Review B 93 (9) 2016/03/08

    DOI: 10.1103/PhysRevB.93.094509  

    ISSN: 2469-9950

    eISSN: 2469-9969

  59. Temperature dependence of damping of the Higgs mode in strongly-coupled superconductors

    Murakami Yuta, Tsuji Naoto, Aoki Hideo, Werner Philipp

    Meeting Abstracts of the Physical Society of Japan 71 1294-1294 2016

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.71.2.0_1294  

  60. Light-induced Higgs-mode resonance and third harmonic generation in superconductors: an analysis with a retarded interaction

    Tsuji Naoto, Murakami Yuta, Aoki Hideo

    Meeting Abstracts of the Physical Society of Japan 71 1321-1321 2016

    Publisher: The Physical Society of Japan

    DOI: 10.11316/jpsgaiyo.71.2.0_1321  

  61. Interaction quench in the Holstein model: Thermalization crossover from electron- to phonon-dominated relaxation Peer-reviewed

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    Physical Review B - Condensed Matter and Materials Physics 91 (4) 2015/01/20

    Publisher: American Physical Society

    DOI: 10.1103/PhysRevB.91.045128  

    ISSN: 1098-0121

    eISSN: 1550-235X

  62. 18aCF-10 Dynamical mean-field analysis of collective excitations in strongly coupled phonon-mediated superconductors

    Murakami Yuta, Werner Philipp, Tsuji Naoto, Aoki Hideo

    Meeting Abstracts of the Physical Society of Japan 70 1250-1250 2015

    Publisher: The Physical Society of Japan (JPS)

    DOI: 10.11316/jpsgaiyo.70.2.0_1250  

    ISSN: 2189-079X

  63. 23pPSA-57 Dynamical mean-field analysis of non-equilibrium superconductivity in an electron-phonon system

    Murakami Yuta, Werner Philipp, Tsuji Naoto, Aoki Hideo

    Meeting Abstracts of the Physical Society of Japan 70 1602-1602 2015

    Publisher: The Physical Society of Japan (JPS)

    DOI: 10.11316/jpsgaiyo.70.1.0_1602  

    ISSN: 2189-079X

  64. Interaction quench in the Holstein model: Thermalization crossover from electron- to phonon-dominated relaxation Peer-reviewed

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    PHYSICAL REVIEW B 91 (4) 2015/01

    DOI: 10.1103/PhysRevB.91.045128  

    ISSN: 2469-9950

    eISSN: 2469-9969

  65. Supersolid phase accompanied by a quantum critical point in the intermediate coupling regime of the holstein model Peer-reviewed

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    Physical Review Letters 113 (26) 2014/12/24

    DOI: 10.1103/PhysRevLett.113.266404  

    ISSN: 0031-9007

    eISSN: 1079-7114

  66. Supersolid states in a spin system: Phase diagram and collective excitations Peer-reviewed

    Yuta Murakami, Takashi Oka, Hideo Aoki

    Physical Review B - Condensed Matter and Materials Physics 88 (22) 2013/12/04

    DOI: 10.1103/PhysRevB.88.224404  

    ISSN: 1098-0121

    eISSN: 1550-235X

  67. Dynamical mean-field analysis of ordered phases in the half-filled Holstein-Hubbard model

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    JPS Conf. Proc. 3, 016023 (2014) 2013/09/29

    More details Close

    We investigate ordered phases (s-wave superconducting (SC), antiferromagnetic<br /> (AF) and charge ordered (CO) phases) of the half-filled Holstein-Hubbard model<br /> using the dynamical mean-field theory in combination with a continuous time<br /> quantum Monte Carlo impurity solver. We particularly focus on the parameter<br /> regime where the electron-electron Coulomb interaction and the phonon mediated<br /> retarded attractive interaction are both comparable to the bare electron<br /> bandwidth to understand the interplay of these interactions and the retardation<br /> effects due to finite phonon frequency \omega_0. Results for the transition<br /> temperatures for SC and AF as a function of the effective interaction<br /> U_eff(=U-\lambda with U the Coulomb repulsion and \lambda the phonon-mediated<br /> attraction) show deviations from the the corresponding results in the<br /> anti-adiabatic limit. These are analyzed by comparing with an effective static<br /> model in the polaron picture. We also determine the phase diagram around<br /> U_eff=0 at low, but nonzero temperatures to show that paramagnetic phases<br /> appear between AF and CO when U and \lambda are small or large, while AF and CO<br /> directly compete with each other at moderate U and \lambda.

  68. Ordered phases in the Holstein-Hubbard model: Interplay of strong Coulomb interaction and electron-phonon coupling Peer-reviewed

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    Physical Review B - Condensed Matter and Materials Physics 88 (12) 2013/09/16

    DOI: 10.1103/PhysRevB.88.125126  

    ISSN: 1098-0121

    eISSN: 1550-235X

Show all ︎Show first 5

Misc. 8

  1. 光ドープ Mott 絶縁体系における準定常相” Peer-reviewed

    村上 雄太, 金子 竜也, 高吉 慎太郎

    固体物理 2024/04

  2. 強相関電子系における高次高調波発生

    村上 雄太

    2024/03

  3. Quantics tensor trainに基づく多スケール時空仮説と場の量子論

    品岡 寛, 村上 雄太, 野垣 康介, 櫻井 理人

    日本物理学会誌 2024/02

  4. 非平衡動的平均場の最近の進展と光誘起ダイナミクス Invited Peer-reviewed

    村上 雄太, 辻 直人, 青木 秀夫

    固体物理 (2018年五月) 2018/05

  5. 8aAD-13 Non-equilibrium DMFT analysis of the Holstein model : a role of phonons for relaxation processes

    Murakami Yuta, Werner Philipp, Tsuji Naoto, Aoki Hideo

    Meeting abstracts of the Physical Society of Japan 69 (2) 513-513 2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  6. Competition and coexistence of an s-wave superconducting state and a charge ordered state in the Holstein-Hubbard model

    Murakami Yuta, Werner Philipp, Tsuji Naoto, Aoki Hideo

    Meeting abstracts of the Physical Society of Japan 68 (2) 743-743 2013/08/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  7. 26pXX-7 Dynamical mean-field theory for competing orders in the Holstein-Hubbard model

    Murakami Yuta, Werner Philipp, Tsuji Naoto, Aoki Hideo

    Meeting abstracts of the Physical Society of Japan 68 (1) 588-588 2013/03/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  8. 18pAL-5 Phase diagram and collective modes of a dimerized spin system

    Murakami Yuta, Oka Takashi, Aoki Hideo

    Meeting abstracts of the Physical Society of Japan 67 (2) 134-134 2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

Show all ︎Show first 5

Presentations 31

  1. High-harmonic generation in strongly correlated systens Invited

    Yuta Murakami

    CQM + b 2024 2024/11

  2. Quasi-steady state description of photo-doped Mott insulators Invited

    Yuta Murakami

    Recent Progress in Many-Body Theories 2024/09

  3. High-harmonic generation in strongly correlated insulators Invited

    Yuta Murakami

    2024 Frontiers in Optics + Laser Science conference 2024/09

  4. Possible hidden phases in photo-doped Mott insulators Invited

    Yuta Murakami

    IMPACT-2024 2024/08

  5. 非平衡動的平均場理論入門 Invited

    村上雄太

    計算物理春の学校2024 2024/03

  6. Hubbard模型で記述される強相関電子系からの高次高調波発生 Invited

    村上雄太

    日本物理学会 2024年春季大会 2024/03

  7. High-harmonic generation in strongly correlated systems Invited

    Yuta Murakami, Shintaro Takayoshi, Kento Uchida, Akihisa Koga, Martin Eckstein, Koichiro Tanaka, Philipp Werner

    APS March Meeting 2024 2024/03

  8. Possible hidden phases in photo-doped Mott insulators Invited

    Yuta Murakami

    NQW 2023 2023/12

  9. 光ドープされたMott絶縁体における準安定状態 Invited

    村上 雄太

    強相関電子系のフロンティア 2023/08

  10. High-harmonic generation in strongly correlated systems Invited

    Yuta Murakami

    Progress in Non-equilibrium Green’s functions 8 2023/08

  11. Spin状態転移近傍における励起子凝縮の非平衡理論

    村上雄太, Philipp Werner

    日本物理学会2020年秋季大会 2020/09/11

  12. キタエフ模型のスピン輸送特性に対する異方性の効果

    田口滉一, 村上雄太, 古賀昌久

    2020/09/09

  13. キタエフ模型におけるスピン伝導

    皆川哲哉, 村上雄太, 古賀昌久, 那須譲治

    日本物理学会2020年秋季大会 2020/09/09

  14. 準結晶励起子絶縁体における光誘起ダイナミクス

    稲吉健, 村上雄太, 古賀昌久

    日本物理学会2020年秋季大会 2020/09/09

  15. 二重交換模型を用いた希土類磁石の解析

    砂川滉太, 村上雄太, 古賀昌久, 吉岡匠哉, 土浦宏紀

    2020/09/08

  16. 空間反転対称性の破れた励起子絶縁体の集団励起モードと光学応答

    金子竜也, Zhiyuan Sun, 村上雄太, Denis Golez, Andrew Millis

    日本物理学会2020年秋季大会 2020/09/08

  17. Fibonacci格子強束縛模型における非線形光学応答

    飯島弘貴, 村上雄太, 古賀昌久

    日本物理学会2020年秋季大会 2020/09/08

  18. 非平衡グリーン関数法とその応用: 励起子相の非平衡誘起 Invited

    村上 雄太

    量子多体計算と第一原理計算の新展開(FQCS)2020 2020/07/10

  19. 二軌道Penrose-Hubbardモデルにおける励起子凝縮

    稲吉健, 村上雄太, 古賀昌久

    日本物理学会2020年春季大会 2020/03/17

  20. 非一様磁場中S=1キタエフ模型における動的スピン相関

    古賀昌久, 皆川哲哉, 村上雄太, 那須譲治

    2020/03/17

  21. 励起子絶縁相における集団励起モードへの電子格子相互作用の影響と観測可能性

    村上雄太, Denis Golez, Paolo Andrich, Hope Bretscher, 金子竜也, 古賀昌久, Andy Millis, Philipp Werner

    日本物理学会2020年春季大会 2020/03/16

  22. 非一様磁場中キタエフ模型の磁化の空間依存性2

    皆川哲哉, 村上雄太, 古賀昌久, 那須譲治

    日本物理学会2020年春季大会 2020/03/16

  23. High Harmonic generation from strongly correlated systems and quantum spin systems Invited

    2019/11/27

  24. High Harmonic Generation from Periodically Driven Mott Insulators

    Yuta Murakami

    The 14th Asia-Pacific Physics Conference 2019 2019/11/19

  25. 共鳴的な周期外場下のFermionic Hubbard模型の非平衡ダイナミクス

    村上雄太, Andreas Herrmann, Martin Eckstein, Philipp Werner

    日本物理学会2019年秋季大会 2019/09/12

  26. 非一様磁場中キタエフ模型の磁化の空間依存性

    皆川哲哉, 那須譲治, 村上雄太, 古賀昌久

    日本物理学会2019年秋季大会 2019/09/12

  27. 強相関電子系およびスピン系における高次高調波発生 Invited

    村上雄太

    日本物理学会2019年秋季大会 2019/09/10

  28. Photo-induced enhancement of excitonic order International-presentation

    Yuta Murakami, Denis Golez, Martin Eckstein, Philipp Werner

    APS March Meeting 2018 2018/03

  29. Nonequilibrium steady states and transient dynamics of conventional superconductors under phonon driving International-presentation Invited

    Yuta Murakami, Naoto Tsuji, Martin Eckstein, Philipp Werner

    APS March Meeting 2018 2018/03

  30. High-Harmonic Generation in Periodically Driven Mott Insulators International-presentation

    Yuta Murakami, Philipp Werner

    MARVEL Review and Retreat 2017 2017/09

  31. Supersolid state and quantum critical point in the intermediate-coupling regime of an electron-phonon system International-presentation

    Yuta Murakami, Philipp Werner, Naoto Tsuji, Hideo Aoki

    International Conference on Strongly Correlated Electron Systems (SCES 2014) 2014/07

Show all Show first 5

Research Projects 6

  1. Real and reciprocal spacetime imaging of many-body excitons and quantum phase control

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: The University of Tokyo

    2024/04/01 - 2028/03/31

  2. Establishment of strong light field photoscience in solids and application to materials science

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Kyoto University

    2021/07/05 - 2026/03/31

  3. 強相関電子系における非平衡定常状態のための理論手法開発と秩序相の光誘起の研究

    村上 雄太

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 若手研究

    Category: 若手研究

    Institution: 東京工業大学

    2020/04/01 - 2024/03/31

    More details Close

    本研究は、外場による励起後に出現する非平衡定常状態を記述する手法の開発とそれを用いた非平衡秩序相の出現可能性の議論を行うことを目的にしている。 本年度は特に非平衡現象のうちphoto-dopingに注目し、そこで現れる非平衡定常状態の記述のある種の有効模型を用いた定式化を行った。そして、1次元拡張Hubbard模型に注目し、infinite time-evolving time decimation(iTEBD)と呼ばれる数値計算手法を組み合わせて、photo-dopingにより出現しうる光誘起秩序状態を明らかにした。特に、光誘起超伝導状態や電荷秩序状態の性質を明らかにし、それらの出現機構を解明した。 この定式化は一般的であり、これまで確立されているさまざまな平衡系の手法を用いて非平衡状態を記述できることに特徴がある。今後は、この定式化を基に、さまざまな強相関模型と動的平均場理論などの理論手法を用いることで、非平衡秩序相をより系統的に調べていく予定である。 また、短時間の計算でも揺らぎの発展などをみることで、非平衡定常状態で現れる秩序相をある程度予想できる。これを踏まえて、強相関電子系における3バンドの短時間シミュレーションを行い、励起子秩序相が励起によって発現しうる条件を特定した。今後は、この結果を踏まえつつ非平衡定常状態を考えることで、短時間シミュレーションで予測される状態が出現しうるかどうかを明らかにする。

  4. 準結晶系における高次高調波発生と光誘起ダイナミクスの理論研究

    村上 雄太

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 新学術領域研究(研究領域提案型)

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東京工業大学

    2020/04/01 - 2022/03/31

    More details Close

    準結晶の特異な空間構造を反映する動的現象に関する研究を理論的行った。特に、i)ペンローズ格子上の励起子秩序の光誘起ダイナミクス、ii)フィボナッチ格子上の光学応答の計算、を行った。 <BR> i)では、ペンローズ格子上の励起子秩序を光励起すると、空間平均だけ見るのであればBCSとBEC領域において通常の結晶と同様の振る舞いが見られることが明らかになった。通常結晶をもちいた先行研究ではBCSとBEC領域のダイナミクスの違いを波数空間で議論していたが、今回の結果は波数空間を超えた理由があることを意味している。また、準結晶に由来する特異なダイナミクスは秩序パラメータや電荷分布の空間構造に強く現れることも明らかにした。その際、補空間空間を用いた解析が有効であることもあきらかにした。 <BR> ii)では、久保公式を用いてフィボナッチ格子上の光学応答を評価した。この結果、光学応答に自己相似的な構造が現れることを明らかにした。これは、状態密度の自己相似構造はこれまで知られていたが、今回の結果では、電流の行列要素に関しても自己相似構造があり、これら二つの協力により光学応答の自己相似性が生じることがわかった。このような動的な性質においても準結晶系に特徴的な自己相似性が現れるとことがわかった点は顕著である。

  5. Theoretical study of photo control of excitonic insulators and high-harmonic generation using realistic models

    Murakami Yuta

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity start-up

    Category: Grant-in-Aid for Research Activity start-up

    Institution: Tokyo Institute of Technology

    2019/08/30 - 2021/03/31

    More details Close

    In this project, we aim to theoretically study possible control of excitonic insulators out of equilibrium and to reveal the origin of the high-harmonic generation in strongly correlated systems using multi-orbital models. In the study of excitonic insulators out of equilibrium, we revealed that there emerges, in the prethermal regime, a noneqilibrium ordered phase with no analogue in equilibrium, In the study of the high-harmonic generation, we showed that excitation structures peculiar in strongly correlated systems play an essential role.

  6. 非平衡超伝導:長時間ダイナミックスのための動的平均場理論開発と光誘起超伝導

    村上 雄太

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東京大学

    2014/04/25 - 2016/03/31

    More details Close

    強い電子格子相互作用が非平衡ダイナミックスに与える影響を調べるために必要な手法開発とその応用を目的として研究を進めてきた。本研究は主に電子格子系の基本的なモデルであるHolsteinモデルに注目した。 2年目の本年度は、1年目に開発した非平衡動的平均場理論に立脚した非平衡Migdal近似を用いて強結合超伝導のHiggsモードの性質を明らかにした。超伝導体中のHiggsモードは近年実験的にも報告され注目を集めているが、理論的には弱結合領域で正当化される静的な平均場を用いた研究が主であり、強結合領域においてこのモードがどのような振る舞いをするかは明らかではなかった。 結果として、(1) 弱結合領域で予言されていたHiggsモードのエネルギーと超伝導ギャップの関係は強結合領域においても成立すること、(2) 弱結合理論と異なりHiggsモードの減衰が強い温度依存性を示すこと、(3)Higgsモード以外にフォノンのダイナミックスに由来する二つ目の振幅モードが強結合領域で出現すること、(4)これら二つの振幅モードが混ざり合う事でHiggsモードのエネルギーがより低エネルギー側にシフトしより長寿命になること、などを明らかにした。これらの研究成果は、今後様々な物質において実験がなされるであろうHiggsモードの性質への予言となっているとともに、その一部は既に実際の実験結果と合致するものとなっている。 また、我々の開発した非平衡動的平均場理論に立脚した非平衡Migdal近似は、量子効果とフォノンから電子自由度へのフィードバックを取り込むことが出来る点が他の方法論と比べた時の強みである。その応用は今回のHiggsモードの性質のみに限った物ではなく今後様々な設定への応用が期待される。

Show all Show first 5

Teaching Experience 8

  1. 電磁気学A 東京大学

  2. 現代物質科学特論I 兵庫県立大学

  3. Exercise class of Quantum Mechanics III Tokyo Institute of Technology

  4. Exercise class of Electro Dynamics III Tokyo Institute of Technology

  5. Exercise class of Quantum Mechanics II Tokyo Institute of Technology

  6. 物理実験 (流体力学、電磁気学) Fribourg大学

  7. 量子力学演習 Fribourg大学

  8. 物理学演習(電磁気学) TA 東京大学

Show all Show first 5

Academic Activities 3

  1. 計算物理春の学校2024 講師

    2024/03 - 2024/03

  2. 第66回 物性若手夏の学校 集中ゼミ講師

    2021/09 - 2021/09

  3. 第57回物性若手夏の学校 世話人

    2012/08/06 - 2012/08/10

    Activity type: Academic society, research group, etc.

Other 1

  1. CREST キャリアエンベロープ位相制御による対称性の破れと光機能発現 研究参加者

    More details Close

    CREST 「キャリアエンベロープ位相制御による対称性の破れと光機能発現」に研究参加者として参加。