Publications

査読付き or 投稿中

  1. "Absorbing Phase Transitions in Artificial Deep Neural Networks"
    Keiichi Tamai, Tsuyoshi Okubo, Truong Vinh Truong Duy, Naotake Natori, and Synge Todo,
    arXiv:2307.02284
  2. “Hunting for quantum-classical crossover in condensed matter problems”
    Nobuyuki Yoshioka, Tsuyoshi Okubo, Yasunari Suzuki, Yuki Koizumi, and Wataru Mizukami,
    arXiv:2210.14109
  3. “Possibility of a topological phase transition in two-dimensional RP3 model”
    Tsuyoshi Okubo and Naoki Kawashima,
    Journal of Physical Society of Japan, 92, 114701 (2010) (arXiv:2112.15053)
  4. "TeNeS: Tensor Network Solver for Quantum Lattice Systems”
    Yuichi Motoyama, Tsuyoshi Okubo, Kazuyoshi Yoshimi, Satoshi Morita, Takeo Kato, and Naoki Kawashima,
    Comput. Phys. Commun. 279, 108437 (2022) (arXiv:2112.13184)
  5. “Gapped ground state in a spin-1/2 frustrated square lattice”
    H. Yamaguchi, N. Uemoto, T. Okubo, Y. Kono, S. Kittaka, T. Sakakibara, T. Yajima, S. Shimono, Y. Iwasaki, and Y. Hosokoshi,
    Physical Review B 104, L060411 (2021). (arXiv:2108.12761)
  6. “Quantum critical phenomena in a spin-1/2 frustrated square lattice with spatial anisotropy”
    H. Yamaguchi, Y. Iwasaki, Y. Kono, T. Okubo, S. Miyamoto, Y. Hosokoshi, A. Matsuo, T. Sakakibara, T. Kida, and M. Hagiwara,
    Physical Review B 103, L220407 (2021). (arXiv:2106.12126)
  7. “Optimized Implementation for Calculation and Fast-Update of Pfaffians Installed to the Open-Source Fermionic Variational Solver mVMC”
    RuQing G. Xu, Tsuyoshi Okubo, Synge Todo, and Masatoshi Imada,
    Comput. Phys. Commun. 277, 108375 (2022). (arXiv:2105.13098)
  8. “Bond-weighted Tensor Renormalization Group”
    Daiki Adachi, Tsuyoshi Okubo, and Synge Todo,
    Physical Review B 105, L060402 (2022). (arXiv:2011.01679)
  9. “Zero-energy excitation in the classical kagome antiferromagnet NaBa2Mn3F11“
    Shohei Hayashida, Hajime Ishikawa, Yoshihiko Okamoto, Tsuyoshi Okubo, Zenji Hiroi, Gøran J. Nilsen, Hannu Mutka, and Takatsugu Masuda,
    Physical Review B 101, 214409 (2020). (arXiv:2006.01526).
  10. "Phase Shift in Skyrmion Crystals”
    Satoru Hayami, Tsuyoshi Okubo, and Yukitoshi Motome,
    Nature Communications 12, 6927 (2021). (arXiv:2005.03168).
  11. "Magnetic-field Induced Quantum Phases in Tensor Network Study of Kitaev Magnets"
    Hyun-Yong Lee, Ryui Kaneko, Li Ern Chern, Tsuyoshi Okubo, Youhei Yamaji, Naoki Kawashima, and Yong Baek Kim,
    Nature Communications 11, 1639 (2020). (arXiv:1908.07671).
  12. "Abelian and Non-Abelian Chiral Spin Liquids in a Compact Tensor Network Representation"
    Hyun-Yong Lee, Ryui Kaneko, Tsuyoshi Okubo, Naoki Kawashima,
    Physical Review B 101, 035140 (2020). (arXiv:1907.02268).
  13. “Anisotropic Tensor Renormalization Group”
    D. Adachi, T. Okubo and S. Todo,
    Physical Review B 102, 054432 (2020). (arXiv:1906.02007)
  14. "A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet"
    R. Okuma, D. Nakamura, T. Okubo, A. Miyake, A. Matsuo, K. Kindo, M. Tokunaga, N. Kawashima, S. Takeyama and Z. Hiroi,
    Nature Communications  10, Article number: 1229 (2019).
  15. "Multiple-q states of the J1-J2 classical honeycomb-lattice Heisenberg antiferromagnet under magnetic fields"
    Tokuro Shimokawa, Tsuyoshi Okubo, Hikaru Kawamura,
    Physical Review B 100, 224404 (2019). (arXiv:1902.01582).
  16. "Gapless Kitaev Spin Liquid to Classical String Gas through Tensor Networks"
    Hyun-Yong Lee, Ryui Kaneko, Tsuyoshi Okubo, Naoki Kawashima,
    Physical Review Letters 123, 087203 (2019).  (arXiv:1901.05786).
  17. "Field-enhanced quantum fluctuation in an S=1/2 frustrated square lattice"
    H. Yamaguchi, Y. Sasaki, T. Okubo, M. Yoshida, T. Kida, M. Hagiwara, Y. Kono, S. Kittaka, T. Sakakibara, M. Takigawa, Y. Iwasaki, and Y. Hosokoshi,
    Physical Review B 98, 094402 (2018). (arXiv:1808.06812)
  18. "Magnetic State Selected by Magnetic Dipole Interaction in Kagome Antiferromagnet NaBa2Mn3F11"
    Shohei Hayashida, Hajime Ishikawa, Yoshihiko Okamoto, Tsuyoshi Okubo, Zenji Hiroi, Maxim Avdeev, Pascal Manuel, Masato Hagihala, Minoru Soda, Takatsugu Masuda,
    Physical Review B 97, 054411 (2018). (arXiv:1712.06740)
  19. "Quantum phase transitions driven by rhombic-type single-ion anisotropy in the S=1 Haldane chain",
    Yu-Chin Tzeng, Hiroaki Onishi, Tsuyoshi Okubo, and Ying-Jer Kao,
    Physical Review B 96, 060404(R) (2017). (arXiv:1705.01558)
  20. "Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagome lattice in CdCu3(OH)6(NO3)2⋅H2O",
    R. Okuma, T. Yajima, D. Hamane, T. Okubo, and Z. Hiroi,
    Physical Review B 95, 095427 (2017). （arXiv:1703.09357）
  21. "Ground state properties of Na2IrO3 determined from ab initio Hamiltonian and its extensions containing Kitaev and extended Heisenberg interactions",
    T. Okubo, K. Shinjo, Y. Yamaji, N. Kawashima, S. Sota, T. Tohyama, and M. Imada,
    Physical Review B 96, 054434 (2017). (arXiv:1611.03614)
  22. "Experimental Realization of a Quantum Pentagonal Lattice",
    H. Yamaguchi, T. Okubo, S. Kittaka, T. Sakakibara, K. Araki, K. Iwase, N. Amaya, T. Ono, and Y. Hosokoshi,
    Scientific Reports5, 15327 (2015).
  23. "SU(N) Heisenberg model with multi-column representations",
    T. Okubo, K. Harada, J. Lou, and N. Kawashima,
    Physical Review B 92, 134404 (2015). （arXiv:1504.05332）
  24. "Scaling relation for dangerously irrelevant symmetry-breaking fields",
    T. Okubo, K. Oshikawa, H. Watanabe, and N. Kawashima,
    Physical Review B 91, 174417 (2015). （arXiv:1411.1872）
  25. "Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs",
    H. Yamaguchi, H. Miyata, M. Yoshida, M. Takigawa, K. Iwase, T. Ono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Shimokawa, T. Okubo, K. Okunishi, A. Matsuo, and Y. Hosokoshi,
    Physical Review B 89, 220402 (2014). （arXiv:1406.2231）
  26. "Snapshot spectrum and critical phenomenon for two-dimensional classical spin systems",
    Y. Imura, T. Okubo, S. Morita, and K. Okunishi,
    Journal of Physical Society of Japan, 83, 114002 (2014) . (arXiv:1402.6767）
  27. "Kagome-Triangular Lattice Antiferromagnet NaBa2Mn3F11",
    H. Ishikawa, T. Okubo, Y. Okamoto, and Z. Hiroi,
    Journal of Physical Society of Japan, 83, 043703 (2014). （arXiv:1403.2128）
  28. "Various regimes of quantum behavior in an S=1/2 Heisenberg antiferromagnetic chain with fourfold periodicity",
    H. Yamaguchi, T. Okubo, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo, K. Kindo, Y. Hosokoshia,
    Physical Review B 88, 174410 (2013). （arXiv:1311.4763）
  29. "Possibility of Deconfined Criticality in SU(N) Heisenberg Models at Small N",
    K. Harada, T. Suzuki, T. Okubo H. Matsuo, J. Lou, H. Watanabe, S. Todo, and N. Kawashima,
    Physical Review B 88, 220408(R) (2013). （arXiv:1307.0501）
  30. "Finite-temperature transition of the distorted kagome-lattice Heisenberg antiferromagnet",
    H. Masuda, T.Okubo and H. Kawamura,
    Physical Review Letters 109, 057201 (2012). (arXiv:1201.5441)
  31. "Multiple-q states and the skyrmion lattice of the triangular lattice Heisenberg antiferromag in magnetic fields ",
    T.Okubo, S. Chung and H. Kawamura,
    Physical Review Letters 108, 017206 (2012). ( arXiv:1109.6161)
  32. "Cubic and non-cubic multiple-q states in the Heisenberg antiferromagnet on the pyrochlore lattice",
    Tsuyoshi Okubo, Trung Hai Nguyen and Hikaru Kawamura,
    Physical Review B 84, 144432 (2011). (arXiv:1107.5440)
  33. "Novel spin-liquid states in the frustrated Heisenberg antiferromagnet on the honeycomb lattice",
    S. Okumura, H. Kawamura, T. Okubo and Y. Motome,
    Journal of Physical Society of Japan, 79, 114705 (2010) . ( arXiv:1004.4441)
  34. "Signature of a Z2vortex in the dynamical correlations of the triangular-lattice Heisenberg antiferromagnet" ,
    T. Okubo and H. Kawamura ,
    Journal of Physical Society of Japan, 79, 084706 (2010) (arXiv:1004.4730 )
  35. "Phase transition of the three-dimensional chiral GL model
    --- search fo the chiral phase" ,
    T. Okubo and H. Kawamura,
    Physical Review B 82, 014404 (2010).
    (arXiv:1001.4662).
  36. "Z2-Vortex Ordering of the Triangular-Lattice Heisenberg Antiferromagnet",
    H. Kawamura, A. Yamamoto and T. Okubo,
    Journal of the Physical Society of Japan 79, 023701 (2010) (arXiv:0909.0121).
  37. "Mean-field analysis of phase transitions in the emergence of hierarchical society",
    T. Okubo and T. Odagaki,
    Physical Review E 76, 036105 (2007).
  38. "Dissipative process under a boundary perturbation",
    T. Okubo and T. Odagaki,
    Physical Review E 73, 026128 (2006).
  39. "Random packing of binary hard discs"
    T. Okubo and T. Odagaki
    Journal of Physics : Condensed Matter 16, 6651 (2004).

 

依頼された文章

  1. 「拡張キタエフ模型における熱ホール伝導度のテンソルネットワーク法による研究」
    大久保毅、固体物理 Vol. 57, No.11, 633-642, 2022.
  2. 「量子多体系とテンソルネットワーク」
    大久保毅、数理科学2022年12月号, 58-64, 2022.
  3. 「テンソルネットワークの将来」
    大久保毅、数理科学2022年2月号, 65-72, 2022.
  4. 「テンソルネットワークによる情報圧縮とフラストレート磁性体への応用」
    大久保毅、第63回物性若手夏の学校テキスト、物性研究 Vol. 7, No.2 (2018).
  5. 「テンソルネットワーク形式の進展と応用」
    西野友年、大久保毅、日本物理学会誌 Vol 72, No. 10, 2017
  6. "Massively parallel Monte Carlo simulation of a possible topological phase transition in two-dimensional frustrated spin systems"
    Tsuyoshi Okubo, Invited paper in ISSP Supercomputer Activity Report 2016.
  7. 「第８回日本物理学会若手奨励賞を受賞して」
    大久保毅　物性研だより 第54巻第2号 2014年7月 （PDFが物性研のwebサイトにあります）
  8. 「フラストレート磁性体における多重Q秩序とスカーミオン格子状態」
    大久保毅、川村光　日本物理学会誌 Vol. 67, No. 7, 2012
  9. "Multiple-q states and skyrmion lattice in frustrated triangular-lattice Heisenberg antiferromagnet"
    Tsuyoshi Okubo and Hikaru Kawamura, Invited paper in ISSP Supercomputer Activity Report 2012.

 

学位論文

  • 卒業論文：「ニ成分剛体円盤のランダムパッキング」　大久保毅２００３年３月
  • 修士論文：「量子力学に従う粒子の初到達時間と境界摂動に対する応答」　大久保毅２００５年３月
  • 博士論文："Linear Response under a Boundary Perturbation"　Tsuyoshi Okubo ２００8年３月