Okunishi Kouichi 奥西巧一

… Alternative Names

OKUNISHI Kouichi 奥西巧一

奥西功一オクニシコウイチ

奥西巧一オクニシコウイチ

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Researcher Number	30332646
Other IDs
External Links
Affiliation (Current)	2026: 大阪公立大学, 大学院理学研究科, 教授
Affiliation (based on the past Project Information) *help	2025: 大阪公立大学, 大学院理学研究科, 教授 2010 – 2024: 新潟大学, 自然科学系, 准教授 2006 – 2009: 新潟大学, 自然科学系, 助教 2007: Niigata University, 理学部, Assistant Professor 2005 – 2006: Niigaka University, Department of Physics, Assistant, 自然科学系, 助手 2004: 新潟大学, 理学部, 助手 2002: 新潟大学, 理学部, 助手
Review Section/Research Field	Principal Investigator Mathematical physics/Fundamental condensed matter physics / Science and Engineering / Transformative Research Areas, Section (II) Except Principal Investigator Condensed matter physics II / Transformative Research Areas, Section (II) / Mathematical physics/Fundamental condensed matter physics / Science and Engineering / Science education
Keywords	Principal Investigator くりこみ群 / エンタングルメント / テンソルネットワーク / 共形場理論 / 数値くりこみ群 / カイラリティー / 状態密度 / 密度行列 / 数値シミュレーション / 厳密解析 … More / 量子計算 / 量子ダイナミクス / 量子多体問題 / 数理構造 / 量子多体ダイナミクス / 計算物理 / 物性基礎論 / サイン2乗変形 / ウンルー効果 / ランダムスピン系 / ランダムシングレット / 量子多体系 / 角転送行列 / 変形問題 / 縮約密度行列 / 負符号問題 / 量子エンタングルメント / 量子モンテカルロ / 非局所変換 / テンソル積状態 / テンソル積 / 擬一次元 / スピン / 密度行列くり込み群 / モンテカルロシミュレーション / 磁場誘起非整合秩序 / 強磁場 / カットオフ / corner Hamiltonian / 磁化過程 / フラストレーション / 量子スピン / スピンチューブ / 非整合秩序 / 密度行列くりこみ群 / 磁場誘起秩序 … More Except Principal Investigator 量子相転移 / 量子スピン系 / スピンナノチューブ / スピンギャップ / 超伝導 / フラストレーション / テンソルネットワーク / quantum phase transition / ナノ磁性体 / 低次元系 / スピン液体 / カイラリティ / ナノチューブ / 電子相関 / d-p模型 / 金属絶縁体転移 / 軌道秩序 / 電荷秩序 / コバルト酸化物 / 並列計算 / 計算物理 / 量子ホール効果 / 冷却原子 / 物性物理 / ゲージ重力対応 / 宇宙論 / 物性理論 / 素粒子論 / 量子情報理論 / 横磁場イジング模型 / テンソル繰り込み群 / テンソルネットワーク状態 / 射影表現 / エンタングルメント / 行列積状態 / フラストレート系 / 角転送行列繰り込み群 / 厳密対角化 / 量子古典対応 / 高次特異値分解 / スケーリング解析 / 古典スピン系 / 密度行列繰り込み群 / metal-insulator transition / orbital order / charge order / superconductivity / frustration / d-p model / electron correlation / cobalt oxides / 動的平均場理論 / 重い電子 / スピン状態転移 / フント則結合 / 結晶場分裂 / 超伝導ギャップ / 超伝導転移温度 / 多軌道 / ペアトランスファー / スレーブボソン / 強磁性スピン揺らぎ / 三角格子 / 熱起電力 / nanomagnets / low-dimensional systems / spin gap / spin nanotube / ground-state phase diagram / magnetization jump / magnetization plateau / finite-field ground state / exact diagonalization method / density-matrix renormalization-group method / one-dimensional S=1 spin chain / 磁場中基底状態 / 1次元S=1スピン鎖 / 1次元S=1量子スピン系 / 基底状態相図 / 磁化のジャンプ / 磁化のプラトー / 有限磁場基底状態 / 厳密対角化法 / 密度行列繰り込み群法 / 1次元S=1スピン類 / カイラル液体 / 磁化プラトー / カイラル秩序 / 量子スピン液体 / スピンギヤツプ / ナノ磁性 / 磁性 / 強磁性 / 軌道自由度 / 反強磁性 / 電子状態計算 / 経路積分 / PCクラスター / インターネット / デルフト工科大学 / 国際共同講義 Less

The Natural Laws of Extreme Universe--A New Paradigm for Spacetime and Matter from Q uantum Information
- Principal Investigator
  
  高柳匡
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Grant-in-Aid for Transformative Research Areas (A)
- Review Section
  
  Transformative Research Areas, Section (II)
- Research Institution
  Kyoto University
Quantum many-body systems and tensor networks from quantum information perspectivesPrincipal Investigator
- Principal Investigator
  
  奥西巧一
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Grant-in-Aid for Transformative Research Areas (A)
- Review Section
  
  Transformative Research Areas, Section (II)
- Research Institution
  Osaka Metropolitan University
  Niigata University
Energy-scale controlling of quantum many-body systems and entanglemet renormalizationPrincipal Investigator
- Principal Investigator
  
  Okunishi Kouichi
- Project Period (FY)
  2017 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Mathematical physics/Fundamental condensed matter physics
- Research Institution
  Niigata University
Entanglement controle in quantum many-body systems by non-local transfromation and negative sign problemPrincipal Investigator
- Principal Investigator
  
  Okunishi Kouichi
- Project Period (FY)
  2014 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Mathematical physics/Fundamental condensed matter physics
- Research Institution
  Niigata University
Optimization of tensor network state using higher order singular value decomposition
- Principal Investigator
  
  Ueda Hiroshi
- Project Period (FY)
  2013 – 2017
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Mathematical physics/Fundamental condensed matter physics
- Research Institution
  Institute of Physical and Chemical Research
  Meiji University
Theory of Novel Quantum Phenomena Created by Spin, Charge, and Chirality in the Spin Nanotube
- Principal Investigator
  
  SAKAI TORU
- Project Period (FY)
  2011 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Condensed matter physics II
- Research Institution
  University of Hyogo
Quantum entanglement for tensor product states and numerical renormalization groupsPrincipal Investigator
- Principal Investigator
  
  OKUNISHI Kouichi
- Project Period (FY)
  2011 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Mathematical physics/Fundamental condensed matter physics
- Research Institution
  Niigata University
強磁場の創る新奇スピン秩序状態の理論解析Principal Investigator
- Principal Investigator
  
  奥西巧一
- Project Period (FY)
  2008 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Review Section
  
  Science and Engineering
- Research Institution
  Niigata University
Theoretical and numerical study on anomalous quantum phenomena in the spin nanotubes
- Principal Investigator
  
  SAKAI Toru
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Condensed matter physics II
- Research Institution
  University of Hyogo
  Japan Atomic Energy Agency
密度行列くりこみ群を用いた強磁場スピン物性の研究Principal Investigator
- Principal Investigator
  
  奥西巧一
- Project Period (FY)
  2006 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Review Section
  
  Science and Engineering
- Research Institution
  Niigata University
renormalization group analysis of the corner HamiltonianPrincipal Investigator
- Principal Investigator
  
  OKUNISHI Kouichi
- Project Period (FY)
  2006 – 2008
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Mathematical physics/Fundamental condensed matter physics
- Research Institution
  Niigata University
コバルト酸化物の電子状態と超伝導の理論
- Principal Investigator
  
  ONO Yoshiaki
- Project Period (FY)
  2005 – 2006
- Research Category
  
  Grant-in-Aid for Scientific Research on Priority Areas
- Review Section
  
  Science and Engineering
- Research Institution
  Niigata University
Theoretical and Numerical Study on Anomalous Quantum Phenomena of the Spin Nanotube
- Principal Investigator
  
  SAKAI Toru
- Project Period (FY)
  2005 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Condensed matter physics II
- Research Institution
  Japan Atomic Energy Institute
Theory of anomalous properties and novel superconductivity due to many body effects in cobalt oxides
- Principal Investigator
  
  ONO Yoshiaki
- Project Period (FY)
  2005 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Condensed matter physics II
- Research Institution
  Niigata University
Novel quantum state in a high-spin chain created by the spontaneous symmetry breaking
- Principal Investigator
  
  TONEGAWA Takashi
- Project Period (FY)
  2004 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Condensed matter physics II
- Research Institution
  Fukui University of Technology
インターネットを利用した計算物理に関する国際共同研究の試み
- Principal Investigator
  
  小林迪助
- Project Period (FY)
  2002
- Research Category
  
  Grant-in-Aid for Exploratory Research
- Research Field
  
  Science education
- Research Institution
  Niigata University

[Journal Article] Tensor Renormalization Group Study of the 3D SU(2) and SU(3) Gauge Theories with the Reduced Tensor Network Formulation2025
- Author(s)
  Yosprakob Atis、Okunishi Kouichi
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 2025 Issue: 3
- DOI
  10.1093/ptep/ptaf028
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PLANNED-21H05191
[Journal Article] Holographic Analysis of Boundary Correlation Functions for the Hyperbolic-Lattice Ising Model2024
- Author(s)
  Okunishi Kouichi、Nishino Tomotoshi
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 2024 Issue: 9 Pages: 1-18
- DOI
  10.1093/ptep/ptae137
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-21K03403
[Journal Article] Entanglement bipartitioning and tree tensor networks2023
- Author(s)
  Okunishi Kouichi、Ueda Hiroshi、Nishino Tomotoshi
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 2023 Issue: 2 Pages: 1-14
- DOI
  10.1093/ptep/ptad018
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21K03403, KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-23K22442
[Journal Article] Automatic structural optimization of tree tensor networks2023
- Author(s)
  Hikihara Toshiya、Ueda Hiroshi、Okunishi Kouichi、Harada Kenji、Nishino Tomotoshi
- Journal Title
  
  Physical Review Research
  
  Volume: 5 Issue: 1 Pages: 013031-013031
- DOI
  10.1103/physrevresearch.5.013031
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-20K03766, KAKENHI-PROJECT-21K03403, KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-19K03664, KAKENHI-PROJECT-23K22442, KAKENHI-PROJECT-21H04446
[Journal Article] A new technique to incorporate multiple fermion flavors in tensor renormalization group method for lattice gauge theories2023
- Author(s)
  Yosprakob Atis、Nishimura Jun、Okunishi Kouichi
- Journal Title
  
  Journal of High Energy Physics
  
  Volume: 2023 Issue: 11 Pages: 187-187
- DOI
  10.1007/jhep11(2023)187
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PLANNED-21H05191
[Journal Article] Statistical mechanics approach to the holographic renormalization group: Bethe lattice Ising model and p-adic AdS/CFT2023
- Author(s)
  Okunishi Kouichi、Takayanagi Tadashi
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 2024 Issue: 1
- DOI
  10.1093/ptep/ptad156
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PLANNED-21H05191, KAKENHI-ORGANIZER-21H05182, KAKENHI-PLANNED-21H05187, KAKENHI-PROJECT-21H04469
[Journal Article] Duality, criticality, anomaly, and topology in quantum spin-1 chains2023
- Author(s)
  Yang Hong、Li Linhao、Okunishi Kouichi、Katsura Hosho
- Journal Title
  
  Physical Review B
  
  Volume: 107 Issue: 12 Pages: 125158-125158
- DOI
  10.1103/physrevb.107.125158
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03445, KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-20J20715
[Journal Article] Translational symmetry broken magnetization plateau of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math> antiferromagnetic Heisenberg chain with competing anisotropies2023
- Author(s)
  Sakai Toru、Okamoto Kiyomi、Okunishi Kouichi、Hashimoto Masaru、Houda Tomoki、Furuchi Rito、Nakano Hiroki
- Journal Title
  
  Physical Review B
  
  Volume: 108 Issue: 17 Pages: 174435-174435
- DOI
  10.1103/physrevb.108.174435
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K11125, KAKENHI-PROJECT-20K03866, KAKENHI-PLANNED-21H05191
[Journal Article] Magnetic Excitation in the S=1/2 Ising-like Antiferromagnetic Chain CsCoCl3 in Longitudinal Magnetic Fields Studied by High-field ESR Measurements2023
- Author(s)
  S. Kimura, H. Onishi, K. Okunishi, M. Akaki, Y. Narumi, M. Hagiwara, K. Kindo, H. Kikuchi
- Journal Title
  
  J. Phys. Soc. Jpn.
  
  Volume: 92 Issue: 9 Pages: 094701-094701
- DOI
  10.7566/jpsj.92.094701
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23K03331, KAKENHI-PROJECT-20K03834, KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-22H00101, KAKENHI-PROJECT-23K20821, KAKENHI-PROJECT-21H01035, KAKENHI-PLANNED-23H04863
[Journal Article] Developments in the Tensor Network ? from Statistical Mechanics to Quantum Entanglement2022
- Author(s)
  Okunishi Kouichi、Nishino Tomotoshi、Ueda Hiroshi
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 91 Issue: 6 Pages: 1-34
- DOI
  10.7566/jpsj.91.062001
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K14359, KAKENHI-PROJECT-21K03403, KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-21H04446
[Journal Article] 量子多体系とテンソルネットワーク～表現形式の普遍性～2022
- Author(s)
  奥西巧一
- Journal Title
  
  数理科学
  
  Volume: 703 Pages: 33-38
- Data Source
  KAKENHI-PLANNED-21H05191
[Journal Article] Angular-time evolution for the Affleck-Kennedy-Lieb-Tasaki chain and its edge-state dynamics2022
- Author(s)
  Nakajima Koutaro、Okunishi Kouichi
- Journal Title
  
  Physical Review B
  
  Volume: 106 Issue: 13 Pages: 134304-134304
- DOI
  10.1103/physrevb.106.134304
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21H05191
[Journal Article] Optical selection rules of the magnetic excitation in the S=1/2 one-dimensional Ising-like antiferromagnet BaCo2V2O82022
- Author(s)
  S. Kimura, H. Onishi, A. Okutani, M. Akaki, Y. Narumi, M. Hagiwara, K. Okunishi, K. Kindo, Z. He, T. Taniyama, M. Itoh
- Journal Title
  
  Phys. Rev. B
  
  Volume: 105 Issue: 1 Pages: 014417-014417
- DOI
  10.1103/physrevb.105.014417
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03678, KAKENHI-PROJECT-19K03745, KAKENHI-PROJECT-17K18758, KAKENHI-PLANNED-21H05191, KAKENHI-PROJECT-19H01834, KAKENHI-PROJECT-21H01035, KAKENHI-PROJECT-20H00314, KAKENHI-PROJECT-23K20821, KAKENHI-PROJECT-22H00101
[Journal Article] Finite-m scaling analysis of Berezinskii-Kosterlitz-Thouless phase transitions and entanglement spectrum for the six-state clock model2020
- Author(s)
  Ueda Hiroshi、Okunishi Kouichi、Harada Kenji、Krcmar Roman、Gendiar Andrej、Yunoki Seiji、Nishino Tomotoshi
- Journal Title
  
  Physical Review E
  
  Volume: 101 Issue: 6 Pages: 062111-062111
- DOI
  10.1103/physreve.101.062111
- NAID
  120006865707
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14359, KAKENHI-PROJECT-17H02931, KAKENHI-PROJECT-17K05578
[Journal Article] Tensor-network strong-disorder renormalization groups for random quantum spin systems in two dimensions2020
- Author(s)
  Kouichi Seki, Toshiya Hikihara, and Kouichi Okunishi
- Journal Title
  
  Physical Review B
  
  Volume: 102 Issue: 14 Pages: 144439-144439
- DOI
  10.1103/physrevb.102.144439
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19K03664, KAKENHI-PROJECT-17H02931
[Journal Article] Unconventional magnetic excitations and spin dynamics of exotic quantum spin systems BaCo_2V_2O_8　and Ba_3CuSb_2O_92020
- Author(s)
  Han Yibo、Kimura Shojiro、Okunishi Kouichi、Hagiwara Masayuki
- Journal Title
  
  Applied Magnetic Resonance
  
  Volume: 2020 Issue: 4 Pages: 1-14
- DOI
  10.1007/s00723-020-01296-w
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H02931
[Journal Article] Corner transfer matrix renormalization group analysis of the two-dimensional dodecahedron model2020
- Author(s)
  Ueda Hiroshi、Okunishi Kouichi、Yunoki Seiji、Nishino Tomotoshi
- Journal Title
  
  Physical Review E
  
  Volume: 102 Issue: 3 Pages: 032130-032130
- DOI
  10.1103/physreve.102.032130
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K14359, KAKENHI-PROJECT-17H02931, KAKENHI-PROJECT-17K05578
[Journal Article] Lattice Unruh Effect and World-line Entanglement for the XXZ Chain2019
- Author(s)
  Okunishi Kouichi、Seki Kouichi
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 88 Issue: 11 Pages: 114002-114002
- DOI
  10.7566/jpsj.88.114002
- NAID
  130008156470
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17H02931
[Journal Article] Snapshot Spectra in the World-Line Quantum Monte Carlo for One-Dimensional Quantum Spin Systems2019
- Author(s)
  Seki Kouichi、Okunishi Kouichi
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 88 Issue: 2 Pages: 024003-024003
- DOI
  10.7566/jpsj.88.024003
- NAID
  210000135087
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17H02931
[Journal Article] Magnetic Properties of One- and Two-Dimensional Functional Materials: Oxygen Molecules Encapsulated in Single-Walled Carbon Nanotubes and Copper Ions Embedded into Phthalocyanine Sheets2019
- Author(s)
  M. Hagiwara, T. Kida, K. Matsuda, H. Kyakuno, Y. Mniwa, Z. Honda, Y. Sakaguchi, M. Tashiro, M. Sakai, T. Fukuda, N. Kamata and K. Okunishi
- Journal Title
  
  Open Chemistry Journal
  
  Volume: 6 Issue: 1 Pages: 27-33
- DOI
  10.2174/1874842201906010027
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K04926, KAKENHI-PROJECT-17H02931
[Journal Article] A low-energy effective model for the S=1/2 Kagome-triangular-strip Heisenberg model2018
- Author(s)
  Okunishi Kouichi、Onozato Yoshitaka、Seki Kouichi
- Journal Title
  
  AIP Advances
  
  Volume: 8 Issue: 10 Pages: 101401-101401
- DOI
  10.1063/1.5042702
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17H02931
[Journal Article] Phase Transitions for Cuboc Orders in Stacked Kagome Heisenberg Systems2018
- Author(s)
  Seki Kouichi、Okunishi Kouichi
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 87 Issue: 2 Pages: 023001-023001
- DOI
  10.7566/jpsj.87.023001
- NAID
  210000134681
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17H02931, KAKENHI-PROJECT-16J02724
[Journal Article] Spin-Wave Analysis for Kagome-Triangular Spin System and Coupled Spin Tubes: Low-Energy Excitation for the Cuboc Order2017
- Author(s)
  Ochiai Masahiro、Seki Kouichi、Okunishi Kouichi
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 86 Issue: 11 Pages: 114701-114701
- DOI
  10.7566/jpsj.86.114701
- NAID
  210000134583
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17H02931, KAKENHI-PROJECT-16J02724, KAKENHI-PROJECT-26400387
[Journal Article] Critical behavior of the two-dimensional icosahedron model2017
- Author(s)
  Ueda Hiroshi、Okunishi Kouichi、Krcmar Roman、Gendiar Andrej、Yunoki Seiji、Nishino Tomotoshi
- Journal Title
  
  Physical Review E
  
  Volume: 96 Issue: 6 Pages: 1-5
- DOI
  10.1103/physreve.96.062112
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05578, KAKENHI-PROJECT-17K14359, KAKENHI-PROJECT-17H02931, KAKENHI-PROJECT-26400387, KAKENHI-PROJECT-25800221
[Journal Article] Sine-square deformation and Mobius quantization of two-dimensional conformal field theory2016
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 6 Issue: 6 Pages: 063A02-063A02
- DOI
  10.1093/ptep/ptw060
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26400387
[Journal Article] Symmetry-protected topological order and negative-sign problem for SO(N) bilinear-biquadratic chains2014
- Author(s)
  Kouchi Okunishi and Kenji Harada
- Journal Title
  
  Physical Review B
  
  Volume: 89 Issue: 13 Pages: 134422-134422
- DOI
  10.1103/physrevb.89.134422
- NAID
  120005666211
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540450, KAKENHI-PROJECT-26400387
[Journal Article] Doubling of Entanglement Spectrum in Tenor Renormalization Group2014
- Author(s)
  Hiroshi Ueda, Kouichi okunishi, Tomotoshi Nishino
- Journal Title
  
  Phys. Rev. B
  
  Volume: 89 Issue: 7 Pages: 1-10
- DOI
  10.1103/physrevb.89.075116
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540388, KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540442, KAKENHI-PROJECT-25400401, KAKENHI-PROJECT-25800221
[Journal Article] Fine-Tuning of Magnetic Interactions in Organic Spin Ladders2014
- Author(s)
  H. Yamaguchi
- Journal Title
  
  Journal of Physical Society of Japan
  
  Volume: 83 Issue: 3 Pages: 33707-33707
- DOI
  10.7566/jpsj.83.033707
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540442, KAKENHI-PROJECT-24340075, KAKENHI-PROJECT-24540347, KAKENHI-PROJECT-24740241, KAKENHI-PROJECT-24840013, KAKENHI-PROJECT-25800186
[Journal Article] Snapshot spectrum and critical phenomenon for two-dimensional classical spin systems2014
- Author(s)
  Yukinari Imura, Tsuyoshi Okubo, Satoshi Morita, Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn.
  
  Volume: 83 Issue: 11 Pages: 114002-114002
- DOI
  10.7566/jpsj.83.114002
- NAID
  210000133329
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26400387
[Journal Article] Quantum Phase Transitions in 1/3 Plateau of the Quantum Spin Tube2013
- Author(s)
  K. Okunishi
- Journal Title
  
  Journal of Korean Physical Society
  
  Volume: 63 Issue: 3 Pages: 596-600
- DOI
  10.3938/jkps.63.596
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540388
[Journal Article] Collapse of Magnetic Order of the Quasi One-Dimensional Ising-Like Antiferromagnet BaCo_2V_2O_8 in Transverse Fields2013
- Author(s)
  Shojiro Kimura, Koichi Okunishi, Masayuki Hagiwara, Koichi Kindo, Zhangzhen He, Tomoyasu Taniyama, Mitsuru Itoh, Keiichi Koyama, and Kazuo Watanabe
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: vol.82 Issue: 3 Pages: 0337061-4
- DOI
  10.7566/jpsj.82.033706
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23246113, KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540442
[Journal Article] Magnetic field-induced phase transitions in the S=1/2 two-leg spin-ladder material Cu(DEP)Br22012
- Author(s)
  Z. Honda, H.A. Katori, M. Ikeda, M. Hagiwara, K. Okunishi, M. Sakai, T. Fukuda, N. Kamata
- Journal Title
  
  Journal of Physical Society of Japan
  
  Volume: 81 Issue: 11 Pages: 113710-4
- DOI
  10.1143/jpsj.81.113710
- NAID
  40019484005
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22360003, KAKENHI-PROJECT-22760531, KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540442
[Journal Article] Spin-chirality separation and S3-symmetry breakings in the magnetization plateau of the quantum spin tube2012
- Author(s)
  Kouichi Okunishi, Masahiro Sato, Toru Sakai, Kiyomi Okamoto, and Chigak. Itoi
- Journal Title
  
  Phys. Rev. B
  
  Volume: 85 Issue: 5 Pages: 54416-54416
- DOI
  10.1103/physrevb.85.054416
- NAID
  120006748878
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740295, KAKENHI-PUBLICLY-22014012, KAKENHI-PUBLICLY-22014016, KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540388, KAKENHI-PROJECT-23540442
[Journal Article] Novel Phase Transition Probed by Sound Velocity in Quasi-One-Dimensionial Ising-Like Antiferromagnet BaCo2V2O82011
- Author(s)
  H.Yamaguchi
- Journal Title
  
  Journal of Physical Society of Japan
  
  Volume: 80 Issue: 3 Pages: 33701-33701
- DOI
  10.1143/jpsj.80.033701
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340109, KAKENHI-PROJECT-23540442
[Journal Article] Topological disentangler for the valence-bond-solid chain2011
- Author(s)
  K.Okunishi
- Journal Title
  
  Physical Review B
  
  Volume: 83
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Topological disentangler for the valence-bond-solid chain2011
- Author(s)
  K.Okunishi
- Journal Title
  
  Physical Review B
  
  Volume: 83 Issue: 10
- DOI
  10.1103/physrevb.83.104411
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340109
[Journal Article] Field Induced Exotic Phenomena of the S=1/2 Three-Leg Quantum Spin Nanotube2010
- Author(s)
  T. Sakai, K. Okunishi, K. Okamoto, C. Itoi and M. Sato
- Journal Title
  
  J. Low Temperature Phys
  
  Volume: 159 Pages: 55-58
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Quantum Spin Nanotubes-frustration, competing orders and criticalities2010
- Author(s)
  T. Sakai, M. Sato, K. Okamoto, K. Okunishi and C. Itoi
- Journal Title
  
  J. Phys. Condens. Matter
  
  Volume: 22
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Half Magnetization Plateau of a Frustrated S=1 Antiferromagnetic Chain2010
- Author(s)
  T. Tonegawa, H. Nakano, T. Sakai, K. Okamoto, K. Okunishi and K. Nomura
- Journal Title
  
  J. Phys. Conf. Ser
  
  Volume: 200
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Wang-Landau simulation of the quasi-one-dimensional spin systems2010
- Author(s)
  K.Okunishi
- Journal Title
  
  Journal of Physics : Conference Series 200
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Wang-Landau simulation of the quasi-one-dimensional spin systems2010
- Author(s)
  K.Okunishi, T.Tanabe
- Journal Title
  
  J.Phys.Conf.Series 200
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20030003
[Journal Article] Quantum Spin Nanotubes-frustration, competing orders and criticalities2010
- Author(s)
  T.Sakai, M.Sato, K.Okunishi, K.Okamoto, C.Itoi
- Journal Title
  
  Journal of Physics : Condensed Matter 22
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Field Induced Exotic Phenomena of the S=1/2 Three-Leg Quantum Spin Nanotube2010
- Author(s)
  T.Sakai, K.Okunishi, K.Okamoto, C.Itoi, M.Sato
- Journal Title
  
  Journal of Low Temperature Physics 159
  
  Pages: 55-58
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Wang-Landau simulation of the quasi-one-dimensional spin systems2010
- Author(s)
  K.Okunishi
- Journal Title
  
  Journal of Physics : Conference Series
  
  Volume: 200 Pages: 22043-22043
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Scale free property and edge state of Wilson's numerical renormalization group2010
- Author(s)
  K.Okunishi
- Journal Title
  
  Physical Review B
  
  Volume: 82
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Wang-Landau simulation for the quasi-one-dimensional Isingmodel2009
- Author(s)
  Takayuki Tanabe and Kouichi Okunishi
- Journal Title
  
  J. Bhys. Soc. Jpn. 78(印刷中)
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Wang-Landau simulation for the quasi-one-dimensional Ising model2009
- Author(s)
  T.Tanabe, K.Okunishi
- Journal Title
  
  J.Phys.Soc.Jpn. 78
- NAID
  10025960201
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20030003
[Journal Article] Quantum Phase Transition of a Triangular Lattice Spin Tube and Edge Spin Effects2009
- Author(s)
  K.Okunishi, S.Yoshikawa, T.Sakai, S.Miyashita
- Journal Title
  
  International Journal of Modern Physics C20
  
  Pages: 1423-1430
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Magnetic Field versus Temperature Phase Diagram of the Spin-1/2 Alternating-Bond Chain Compound F5PNN2009
- Author(s)
  Y. Yoshida, T. Kawae, Y. Hosokoshi, K. Inoue, N. Maeshima, K. Okunishi, K. Okamoto and T. Sakai
- Journal Title
  
  J. Phys. Soc. Jpn
  
  Volume: 78
- NAID
  130005437533
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Quantum Phase Transition of a Triangular Lattice Spin Tube and Edge Spin Effects2009
- Author(s)
  K.Okunishi
- Journal Title
  
  International Journal of Modern Physics C 20
  
  Pages: 1423-1430
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Quantum Phase Transition of a Triangular Lattice Spin Tube and Edge Spin Effects2009
- Author(s)
  K. Okunishi, S. Yoshikawa, T. Sakai and S. Miyashita
- Journal Title
  
  Int. J. Mod. Phys. C
  
  Volume: 20 Pages: 1423-1430
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Quantum phase transitions of the asymmetric three-leg spin tube2008
- Author(s)
  T.Sakai, M.Sato, K.Okunishi, Y.Otsuka, K.Okamoto, C.itoi
- Journal Title
  
  Physical Review B78
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Longitudinal SDW order in a quasi-1D Ising-like quantum antiferromagnet2008
- Author(s)
  S. Kimura, M. Matsuda, T. Masuda, S. Hondo, K. Kaneko, N. Metoki, M. Hagiwara, T. Takeuchi, K. Okunishi, Z. He, K. Kindo, T. Taniyama, M. Itoh
- Journal Title
  
  Phys. Rev. Lett 101
  
  Pages: 207201-207201
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Quantum phase transitions of the asymmetric three-leg spin tube2008
- Author(s)
  Toru Sakai, Masahiro Sato, Kouichi Okunishi, Yuichi Otsuka, Kiyomi Okamoto, Chigak Itoi
- Journal Title
  
  Phys. Rev B 78
  
  Pages: 184415-184415
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] On calculation of vector spin chirality for zigzag spin chains2008
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Bhys. Soc. Jpn. 77
  
  Pages: 114004-114004
- NAID
  110006983740
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] On calculation of vector spin chirality for zigzag spin chains2008
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn 77
  
  Pages: 114004-114004
- NAID
  110006983740
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] On calculation of vector spin chirality for zigzag spin chains2008
- Author(s)
  K. Okunishi
- Journal Title
  
  Journal of Physical Society of Japan 77
- NAID
  110006983740
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] On calculation of vector spin chirality for zigzag spin chains2008
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn 77
  
  Pages: 114004-114004
- NAID
  110006983740
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20030003
[Journal Article] Novel ordering of an S = 1/2 quasi one-dimensional Ising-like anitiferromagnet in magnetic field2008
- Author(s)
  S. Kimura, T. Takeuchi, K. Okunishi, M. Hagiwara, Z. He, K. Kindo, T. Taniyama, M. Itoh
- Journal Title
  
  Phys. Rev. Lett 100
  
  Pages: 57202-57202
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Quantum phase transitions of the asymmetric three-leg spin tube2008
- Author(s)
  T. Sakai, M. Sato, K. Okunishi, Y. Otsuka, K. Okamoto and C. Itoi
- Journal Title
  
  Phys. Rev. B
  
  Volume: 78
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20340096
[Journal Article] Wilson-like real-space renormalization group and low-energy effective spectrum of the XXZ chain in the gapless regime2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Journal of Physical Society of Japan 76
  
  Pages: 63001-63001
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Wilson-like real-space renormalization group and low-energy effective spectrum of the XXZ chain in the critical regime2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn 76
  
  Pages: 63001-63001
- NAID
  110006342573
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Exotic Finite Temperature Phase Diagram for Weakly Coupled S = 1/2 XXZ Chain in a Magnetic Field2007
- Author(s)
  Takahumi Suzuki, Naoki Kawashima and Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn 76
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Wilson-Like Real-Space Renormalization Group and Low-Energy Effective Spectrum of the XXZ Chain in the Critical Regime2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan 76
- NAID
  110006342573
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Field-induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  K.Okunishi
- Journal Title
  
  Physical Review B 76
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Chemical potential-electron density curve of the zigzag Hubbard ladder for Pr2472007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Mag. Mag. Matt. (印刷中)
- Data Source
  KAKENHI-PROJECT-18044004
[Journal Article] Field-induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Physical Review B 76
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dimensional superconductor Pr_2Ba_4Cu_7O_<15-δ>2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Phys. Rev. B 75
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dime nsional superconductor Pr_2Ba_4Cu_7O_<15-δ>2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Physical Review B 75
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Field-induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Phys. Rev. B 76
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Wilson-like real-space renormalization group and low-energy effective spectrum of the XXZ chain in the critical regime2007
- Author(s)
  Kouichi, Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn Vol.76
- NAID
  110006342573
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Chemical potential-electron density curve of the zigzag Hubbard ladder for Pr2472007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Mag. Mag. Matt. (印刷中)
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Wilson-like real space renormalization group and low energy effective spectrum of the XXZ chain in the critical regime2007
- Author(s)
  K. Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan 76
- NAID
  110006342573
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Quantum Phase Transition in the three-leg nanotube2007
- Author(s)
  T.Sakai, K.Okunishi, K.Okamoto, M.Sato, M.Matsumoto, Y.Otsuka
- Journal Title
  
  J. Mag. Mag. Matt. 310
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Wilson-like real-space renormalization group and low-energy effective spectrum of the XXZ chain in the critical regime2007
- Author(s)
  K.Okunishi
- Journal Title
  
  Journal of Physical Society of Japan 76
- NAID
  110006342573
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Field-induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  K. Okunishi
- Journal Title
  
  Physical Review B 76
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Wilson-like real-space renormalization group and low-energy effective spectrum of the XXZ chain in the critical regime2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn. 76
- NAID
  110006342573
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dime nsional superconductor Pr2Ba4Cu7O15-δ2007
- Author(s)
  K. Okunishi
- Journal Title
  
  Physical Review B 75
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dimensional superconductor Pr2Ba4Cu7O{15-delta}2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Phys. Rev B75
  
  Pages: 174514-174514
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dimensional superconductor Pr_2Ba_4Cu_7O_15-δ2007
- Author(s)
  Kouichi, Okunishi
- Journal Title
  
  Phys. Rev. B Vol.75
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Field induced order-disorder transition driven by a softening of spinon excitation2007
- Author(s)
  S. Kimura, T. Takeuchi, K. Okunishi, M. Hagiwara, Z. He, K. Kindo, T. Taniyama, M. Itoh
- Journal Title
  
  Physical Review Letters 99
  
  Pages: 87602-87602
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18044004
[Journal Article] Field induced order-disorder transition driven by a softening of spinon excitation2007
- Author(s)
  S. Kimura, H. Yashiro, K. Okunishi, M. Hagiwara, Z. He, K. Kindo, T. Taniyama, M. Itoh
- Journal Title
  
  Phys. Rev. Lett 99
  
  Pages: 87602-87602
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dimensional superconductor Pr2Ba4Cu7O15-δ2007
- Author(s)
  K.Okunishi
- Journal Title
  
  Physical Review B 75
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Exotic Finite-Temperature Phase Diagram for Weakly Coupled S=1/2 XXZ Chain in a Magnetic Field2007
- Author(s)
  T. Suzuki, N. Kawashima, K. Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan 76
  
  Pages: 123707-123707
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18044004
[Journal Article] Field-Induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  K. Okunishi and T. Suzuki
- Journal Title
  
  Physical Review B 76
  
  Pages: 224411-224411
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18044004
[Journal Article] Exotic Finite-Temperature Phase Diagram for Weakly Coupled S=1/2 XXZ Chain in a Magnetic Field2007
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan 76
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Filling dependence of the zigzag Hubbard ladder for the quasi-one-dimensional superconductor Pr_2Ba_4Cu_7O<15-δ>2007
- Author(s)
  K.Okunishi
- Journal Title
  
  Physical Review B 75
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Quantum Phase Transition in the three-leg nanotube2007
- Author(s)
  T.Sakai, K.Okunishi, K.Okamoto, M.Sato, M.Matsumoto, Y.Otsuka
- Journal Title
  
  J. Mag. Mag. Matt. 310
- Data Source
  KAKENHI-PROJECT-18044004
[Journal Article] Field-Induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  K. Okunishi and T. Suzuki
- Journal Title
  
  Physical Review B 76
  
  Pages: 224411-224411
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Field-induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field2007
- Author(s)
  Kouichi Okunishi and Takahumi Suzuki
- Journal Title
  
  Phys. Rev B 76
  
  Pages: 224411-224411
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Possibiity of field-induced incommensurate order in a quasi-one-dimensional frustrated spin system2006
- Author(s)
  N.Maesshima, K.Okunishi, K.okamoto, T.Sakai, K.Yonemitsu
- Journal Title
  
  J. Phys : condens. Matt. 18
  
  Pages: 4819-4826
- Data Source
  KAKENHI-PROJECT-18044004
[Journal Article] Possibiity of field-induced incommensurate order in a quasi-one dimensional frustrated spin system2006
- Author(s)
  N.Maesshima, K.Okunishi, K.okamoto, T.Sakai, K.Yonemitsu
- Journal Title
  
  J. Phys : condens. Matt. 18
  
  Pages: 4819-4826
- Data Source
  KAKENHI-PROJECT-18740230
[Journal Article] Field-Induced Incommensurate Order in a Quasi-1D Antiferromagnet2006
- Author(s)
  T.Sakai, K.Okamoto, K.Okunishi, T.Tonegawa
- Journal Title
  
  Proc.24th Int.Conf.Low Temperature Physics (in press)
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16540332
[Journal Article] Real-space renormalization group approach for the corner Hamiltonian2005
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan Vol.74 No.12
  
  Pages: 3186-3192
- NAID
  110002975239
- Data Source
  KAKENHI-PROJECT-17038011
[Journal Article] Fractional Sz Excitation and its Boundstate for the S=1/2 Antiferro-magnetic Zigzag Spin Chain in a Magnetic Field2005
- Author(s)
  K.Okunishi, T.Tonegawa
- Journal Title
  
  J.Phys.Soc.Jpn 74(Suppl)
  
  Pages: 151-156
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16540332
[Journal Article] Real-space renormalization group approach for the corner Hamiltonian2005
- Author(s)
  K.Okunishi
- Journal Title
  
  Journal of Physical Society of Japan 74
  
  Pages: 3186-3192
- NAID
  110002975239
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Real-space renormalization group approach for the corner Hamiltonian2005
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan Vol.74 No.12
  
  Pages: 3186-3192
- NAID
  110002975239
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Fractional Sz Excitation and its Boundstate for the S=1/2 Antiferromagnetic Zigzag Spin Chain in a Magnetic Field2005
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn. 74.Suppl.
  
  Pages: 151-156
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-16540332
[Journal Article] Low-energy excitations of the S=1/2 quantum spin tube with triangular lattice structure2005
- Author(s)
  K.Okunishi
- Journal Title
  
  Progress of Theoretical Physics Supplement 159
  
  Pages: 297-301
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17340100
[Journal Article] Real-Space Renormalization Group Approach for the Corner Hamiltonian2005
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  Journal of the Physical Society of Japan 74
  
  Pages: 3186-3192
- NAID
  110002975239
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Real-Space Renormalization Group Approach for the Corner Hamiltonian2005
- Author(s)
  Kouichi, Okunishi
- Journal Title
  
  J. Phys. Soc. Jpn. Vol.74
  
  Pages: 3186-3192
- NAID
  110002975239
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-17540317
[Journal Article] Fractional S^z Excitation and its Boundstate for the S=1/2 Antiferromagnetic Zigzag Spin Chain in a Magnetic Field2005
- Author(s)
  Kouichi Okunishi
- Journal Title
  
  J.Phys.Soc.Jpn. 74,Suppl.
  
  Pages: 151-156
- Data Source
  KAKENHI-PROJECT-16540332
[Journal Article] Finite-Field Ground State of an S=1 Anisotropic Antiferromagnetic Chain2005
- Author(s)
  T.Tonegawa, K.Okunishi, T.Sakai, M.Kaburagi
- Journal Title
  
  Prog.Thore.Phys. No.159(Supplement)
  
  Pages: 77-81
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-16540332
[Journal Article] Fractional Sz excitation and its bound state for the S=1/2 antifeiromagnetic zigzag spin chain in a magnetic field2005
- Author(s)
  K.Okunishi
- Journal Title
  
  Journal of Physical Society of Japan Supplement 74
  
  Pages: 151-156
- Data Source
  KAKENHI-PROJECT-17340100
[Presentation] MPS decomposition of MC snapshots and its entanglement spectrum2025
- Author(s)
  奥西巧一
- Organizer
  計算科学の新展開：TNスキームと量子・古典融合
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 双曲格子イジング模型の縁スピン相関関数とホログラフィー2024
- Author(s)
  奥西巧一, 西野友年
- Organizer
  日本物理学会第79回年次大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] Holographic analysis of boundary correlation functions for the hyperbolic lattice Ising model2024
- Author(s)
  Kouichi Okunishi
- Organizer
  ExU-OIST workshop "Quantum Extreme Universe: Matter, Information, and Gravity."
- Invited
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] ベーテ格子イジング模型のホログラフィックくりこみ群2024
- Author(s)
  奥西巧一,高柳匡
- Organizer
  日本物理学会 2024年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] S=1ハイゼンベルク鎖の基底状態に対する角度時間相関関数の数値解析2024
- Author(s)
  貝瀬巧真,奥西巧一
- Organizer
  日本物理学会 2024年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 競合する異方性のある反強磁性S=1鎖における並進対称性破れプラトーと磁気相図2024
- Author(s)
  岡本清美, 坂井徹, 奥西巧一, 橋本理, 法田朋久, 古内理人, 中野博生
- Organizer
  日本物理学会 2024年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] ネットワーク構造最適化を含んだツリーテンソルネットワーク法の性能評価2024
- Author(s)
  引原俊哉, 上田宏, 奥西巧一, 原田健自, 西野友年
- Organizer
  日本物理学会第79回年次大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] AKLT鎖におけるスピン演算子の角度時間発展とストリング秩序2024
- Author(s)
  中島康太郎,奥西巧一
- Organizer
  日本物理学会 2024年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] S=1ハイゼンベルク鎖の基底状態に対する角度時間発展の数値解析2024
- Author(s)
  貝瀬巧真, 奥西巧一
- Organizer
  日本物理学会第79回年次大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] Numerical analysis of the angular-time evolution for the S=1 Heisenberg chain2024
- Author(s)
  Takuma Kaise, Kouichi Okunishi
- Organizer
  Numerical analysis of the angular-time evolution for the S=1 HeisExU-OIST workshop "Quantum Extreme Universe: Matter, Information, and Gravity."enberg chain
- Invited
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] A statistical mechanics approach to holographic renormalization group2024
- Author(s)
  Kouichi Okunishi
- Organizer
  SQAI-NCTS Workshop on Tensor Network and Quantum Embedding
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] A statistical mechanics approach to holographic renormalization group2024
- Author(s)
  Kouichi Okunishi
- Organizer
  Functional Renormalization Group at Niigata 2024
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 競合する異方性のあるスピンラダー系の並進対称性の破れた磁化プラトー2024
- Author(s)
  坂井徹, 岡本清美, 奥西巧一, 橋本理, 法田朋久, 古内理人, 中野博生
- Organizer
  日本物理学会 2024年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 異方的S=1鎖における1/2飽和磁化プラトーII2023
- Author(s)
  岡本清美, 坂井徹, 奥西巧一
- Organizer
  日本物理学会第78回年次大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] ネットワーク構造最適化を含んだツリーテンソルネットワーク法の開発II2023
- Author(s)
  引原俊哉, 上田宏, 奥西巧一, 原田健自, 西野友年
- Organizer
  日本物理学会 2023年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 異方的S=1鎖における1/2飽和磁化プラトー2023
- Author(s)
  岡本清美, 坂井徹, 奥西巧一
- Organizer
  日本物理学会 2023年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 競合する異方性のあるS=1/2ボンド交代鎖の磁化プラトー2023
- Author(s)
  坂井徹, 岡本清美, 奥西巧一, 古内理人, 中野博生
- Organizer
  日本物理学会第78回年次大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] Entanglement bipartitioning and tree tensor networks2023
- Author(s)
  Kouichi Okunishi, Hiroshi Ueda, Tomotoshi Nishino
- Organizer
  TNSAA2022-2023
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] エンタングルメント分割と樹状テンソルネットワークの変分最適化2023
- Author(s)
  奥西巧一, 上田宏, 西野友年
- Organizer
  日本物理学会 2023年春季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] S=1スピン鎖における対称性に守られたトポロジカル秩序と非局所ユニタリ変換2023
- Author(s)
  奥西巧一
- Organizer
  tensor network 2023
- Invited
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 量子スピン鎖の角度時間発展とエンタングルメント2022
- Author(s)
  奥西巧一
- Organizer
  駒場素粒子論セミナー
- Invited
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] Angular-time evolution and entanglement spectrum for 1D quantum spin chains2022
- Author(s)
  Kouichi Okunishi
- Organizer
  APPC15
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] ネットワーク構造最適化を含んだツリーテンソルネットワーク法の開発2022
- Author(s)
  引原俊哉, 上田宏, 奥西巧一, 原田健自, 西野友年
- Organizer
  日本物理学会　2022年秋季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] 双曲面イジング模型の相関関数とホログラフィー2022
- Author(s)
  奥西巧一、西野友年
- Organizer
  日本物理学会　2022年秋季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] AKLT鎖におけるスピンの角度時間発展とその端状態への依存性2022
- Author(s)
  中島康太郎、奥西巧一
- Organizer
  日本物理学会　2022年年次大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] Criticality, duality, and topology in quantum spin-1 chains2021
- Author(s)
  Hong Yang, Linhao Li, Kouichi Okunishi, Hosho Katsura
- Organizer
  日本物理学会　2021年秋季大会
- Data Source
  KAKENHI-PLANNED-21H05191
[Presentation] "Lattice Unruh effect and world-line entanglement for the XXZ chain"2021
- Author(s)
  Kouichi Okunishi
- Organizer
  Recent progress in theoretical physics based on quantum information theory
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] XXZ鎖における格子Unruh効果と世界線のエンタングルメント2020
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] エンタングルメント分割と樹状テンソルネットワークの相互情報量最適化原理2019
- Author(s)
  奥西巧一、上田宏、西野友年
- Organizer
  日本物理学会秋期大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] XXZ鎖における格子Unruh効果と世界線エンタングルメント2019
- Author(s)
  奥西巧一
- Organizer
  サイン2乗変形（SSD）とその周辺2019
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] 実空間繰り込み群法の改良と二次元ランダム量子スピン系への適用2019
- Author(s)
  関孝一、引原俊哉、奥西巧一
- Organizer
  日本物理学会秋季大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] Corner transfer matrix and lattice Unruh effect for the XXZ chain2019
- Author(s)
  奥西巧一
- Organizer
  Tensor Network States: Algorithms and Applications 2019-2020
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] 1次元量子系のエンタングルメントスペクトルとCFTのメビウス量子化2019
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会（九州大学）
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] Numerical strong-disorder renormalization group for two-dimensional random quantum spin systems2019
- Author(s)
  関孝一、引原俊哉、奥西巧一
- Organizer
  Tensor Network States: Algorithms and Applications 2019-2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] A low-energy effective model for the S=1/2 Kagome-triangular-strip Heisenberg model2018
- Author(s)
  Kouichi Okunishi
- Organizer
  International Conference of Magnetism 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] カゴメ三角ストリップ模型の有効模型2018
- Author(s)
  小野里佳孝, 奥西巧一, 関孝一
- Organizer
  日本物理学会第73回年次大会
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] サイン２乗変形と運動量2018
- Author(s)
  奥西巧一
- Organizer
  日本物理学会第73回年次大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] 共形場理論のメビウス量子化とエンタングルメント2018
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会（同志社大学）
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] カゴメ三角ストリップ模型の有効模型2018
- Author(s)
  小野里佳孝, 奥西巧一, 関孝一
- Organizer
  日本物理学会第73回年次大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] サイン２乗変形と運動量2018
- Author(s)
  奥西巧一
- Organizer
  日本物理学会第73回年次大会
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] 離散化された古典ハイゼンベルグ模型に現れる相転移2017
- Author(s)
  上田宏, 奥西巧一, Roman Krcmar, Andrej Gendiar, 柚木清司, 西野友年
- Organizer
  日本物理学会第2017年秋期大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] 離散化された古典ハイゼンベルグ模型に現れる相転移2017
- Author(s)
  上田宏, 奥西巧一, Roman Krcmar, Andrej Gendiar, 柚木清司, 西野友年
- Organizer
  日本物理学会２０１７年秋季大会
- Data Source
  KAKENHI-PROJECT-25800221
[Presentation] カゴメ三角格子ストリップ上のスピン模型の磁化過程2017
- Author(s)
  小野里佳孝, 奥西巧一, 関孝一
- Organizer
  日本物理学会2017年秋季大会
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] カゴメ三角格子ストリップ上のスピン模型の磁化過程2017
- Author(s)
  小野里佳孝, 奥西巧一, 関孝一
- Organizer
  日本物理学会第2017年秋期大会
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] サイン2乗変形と2次元共形場理論のメビウス量子化2017
- Author(s)
  奥西巧一
- Organizer
  日本物理学会第72回年次大会
- Place of Presentation
  大阪大学
- Year and Date
  2017-03-17
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] 離散化された古典ハイゼンベルグ模型に現れる相転移2017
- Author(s)
  上田宏, 奥西巧一, Roman Krcmar, Andrej Gendiar, 柚木清司, 西野友年
- Organizer
  日本物理学会2017年秋季大会
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] Sine-square deformation and Mobius quantization of 2D CFTs2017
- Author(s)
  Kouichi Okunishi
- Organizer
  Workshop on Sine square deformation and related topics
- Data Source
  KAKENHI-PROJECT-17H02931
[Presentation] Snapshot spectrum and critical phenomenon for the 2D classical spin system2016
- Author(s)
  Kouichi Okunishi
- Organizer
  Tensor Network States: Algorithms and Applications 2016
- Place of Presentation
  Okazaki Conference center
- Year and Date
  2016-01-11
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] Sine-square deformatioin and Mobius quantization of 2D CFTs2016
- Author(s)
  Kouichi Okunishi
- Organizer
  4 th workshop pn tensor network states -algorithms and applications
- Place of Presentation
  台湾　国立精華大学
- Year and Date
  2016-12-12
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] Snapshot spectrum of world line quantum monte carlo for one-dimensinal quantum spin systems2016
- Author(s)
  Kouichi Seki and Kouichi Okunishi
- Organizer
  4 th workshop pn tensor network states -algorithms and applications
- Place of Presentation
  台湾　国立精華大学
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] 不純物問題の数値くりこみ群とエンタングルメント2016
- Author(s)
  奥西巧一
- Organizer
  第７１回日本物理学会年次大会
- Place of Presentation
  東北学院大学
- Year and Date
  2016-03-19
- Invited
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] Sine-square deformation and Nobius quantization of CFT2016
- Author(s)
  Kouichi Okunishi
- Organizer
  Squantum Information in String Theory and Many-body systems
- Place of Presentation
  京都大学　基礎物理学研究所
- Year and Date
  2016-05-31
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] １次元量子スピン系のスナップショットスペクトルと相関関数2015
- Author(s)
  奥西巧一
- Organizer
  日本物理学科秋季大会
- Place of Presentation
  関西大学
- Year and Date
  2015-09-16
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] Symmetry-protected topological entanglement and negative sign problem for SO(N) bilinear-biquadratic chainｓ2014
- Author(s)
  Kouichi Okunishi
- Organizer
  Tensor Network States: Algorithms and Applications
- Place of Presentation
  中国科学院物理学研究所
- Year and Date
  2014-12-04
- Invited
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] 数値くりこみ群の発展‐密度行列くりこみ群からMERAまで2014
- Author(s)
  奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  東海大学（神奈川県）
- Invited
- Data Source
  KAKENHI-PROJECT-23340109
[Presentation] 数値くりこみ群の発展‐密度行列くりこみ群からMERAまで2014
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会
- Place of Presentation
  東海大学
- Invited
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] 数値くりこみ群の発展-DMRGからMERA まで2014
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会
- Place of Presentation
  東海大学
- Year and Date
  2014-03-27
- Invited
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] bilinear-biquadratic 鎖の負符号問題2013
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会
- Place of Presentation
  広島大学
- Year and Date
  2013-03-26
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] bilinear-biquadratic スピン鎖の負符号問題II2013
- Author(s)
  奥西巧一, 他
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  徳島大学
- Year and Date
  2013-09-26
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] bilinear-biquadratic鎖の負符号問題2013
- Author(s)
  奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  広島大学
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] bilinear-biquadraticスピン鎖の負符号問題II2013
- Author(s)
  奥西巧一，原田健自
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  徳島大学
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] Wilson 数値くりこみ群とエンタングルメント2012
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会
- Place of Presentation
  関西学院大学
- Year and Date
  2012-03-26
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] 数値的くりこみ群アルゴリズムとエンタングルメント2012
- Author(s)
  奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  横浜国立大学
- Invited
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] Wilson 数値くりこみ群の場の理論化2012
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  横浜国立大学
- Year and Date
  2012-09-14
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] Quantum phase transitions in 1/3 plateau of quantum spin tube2012
- Author(s)
  奥西巧一
- Organizer
  国際磁性学会議
- Place of Presentation
  プサン国際会議場
- Year and Date
  2012-07-13
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] Wilson数値繰り込み群とエンタングルメント2012
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会
- Place of Presentation
  関西学院大学
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] Quantum phase transitions in 1/3 plateau of the quantum spin tube2012
- Author(s)
  Kouichi　Okunishi
- Organizer
  国際磁性学会議（ICM）
- Place of Presentation
  プサン国際会議場
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] 数値くりこみ群アルゴリズムとエンタングルメント2012
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  横浜国立大学
- Year and Date
  2012-09-14
- Invited
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] Wilsonの数値繰り込み群の場の理論化2012
- Author(s)
  奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  横浜国立大学
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] 量子スピンチューブの最近の発展(理論)2012
- Author(s)
  奥西巧一
- Organizer
  京都大学基礎物理学研究所研究会「量子スピン系の物理」
- Place of Presentation
  京都大学基礎物理学研究所（京都府）
- Invited
- Data Source
  KAKENHI-PROJECT-23340109
[Presentation] スピンチューブのプラトー状態での内部対称性と新奇秩序の数値的研究2011
- Author(s)
  奥西巧一, 他
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  富山大学
- Year and Date
  2011-09-22
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] VBS 状態のDisentanglerII2011
- Author(s)
  奥西巧一, 他
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  富山大学
- Year and Date
  2011-09-21
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] 密度行列くり込み群を用いたフラストレーション量子スピン系の磁化過程の研究2010
- Author(s)
  奥西巧一
- Organizer
  日本物理学会年次大会
- Place of Presentation
  岡山大学
- Year and Date
  2010-03-21
- Data Source
  KAKENHI-PROJECT-20030003
[Presentation] Quantum Phase Transitions of Three-Leg Spin Nanotubes2010
- Author(s)
  K.Okunishi
- Organizer
  International Workshop on Statistical Physics of Quantum Systems
- Place of Presentation
  東京大学生産技術研究所
- Year and Date
  2010-08-02
- Data Source
  KAKENHI-PROJECT-20340096
[Presentation] 擬一次元Ising型反強磁性体B_aCo_2V_2O_8の磁歪のQMCによる解析2008
- Author(s)
  田辺孝行,奥西巧一
- Organizer
  日本物理学会春季大会
- Place of Presentation
  立教大学
- Year and Date
  2008-04-27
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] S=1/2擬一次元XXZ モデル物質B_aCo_2V_2O_8の磁場中磁気励起2008
- Author(s)
  本堂英,益田隆嗣,松浦直人,奥西巧一,木村尚次郎,萩原政幸,松田雅昌,金子耕士,目時直人,K. Rule
- Organizer
  日本物理学会春季大会
- Place of Presentation
  立教大学
- Year and Date
  2008-04-27
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] Wang-Landauシミュレーションによる擬一次元系古典スピン模型の解析2008
- Author(s)
  田辺孝行,奥西巧一
- Organizer
  日本物理学会春季大会
- Place of Presentation
  近畿大学
- Year and Date
  2008-04-24
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] Wang-Landau法を用いた擬1次元古典XXZ模型のスピンフロップ転移の解析2008
- Author(s)
  田辺孝行,奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  岩手大学
- Year and Date
  2008-09-23
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] ジグザグスピン鎖のベクトルカイラル秩序2008
- Author(s)
  奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  岩手大学
- Year and Date
  2008-09-23
- Data Source
  KAKENHI-PROJECT-20030003
[Presentation] 擬1次元XXZ 模型における磁場誘起非整合秩序2008
- Author(s)
  奥西巧一,鈴木隆史
- Organizer
  日本物理学会春季大会
- Place of Presentation
  近畿大学
- Year and Date
  2008-04-25
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] ジグザグスピン鎖のベクトルカイラル秩序2008
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  岩手大学
- Year and Date
  2008-09-22
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] =1/2 擬一次元反強磁性XXZ モデル物質B_aCo_2V_2O_8のゼロ磁場磁気励起の観測2008
- Author(s)
  本堂英,益田隆嗣,松浦直人,奥西巧一,木村尚次郎,萩原政幸,松田雅昌,金子耕士,目時直人
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  岩手大学
- Year and Date
  2008-09-21
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 擬一次元Ising型反強磁性体B_aCo_2V_2O_8の強磁場中放射光X 線回折2008
- Author(s)
  木村尚次郎,萩原政幸,吉居俊輔,鳴海康雄,寺田典樹,田中良和,岩城雅裕,勝又紘一,奥西巧一,金道浩一,何長振,谷山智康,伊藤満,豊川秀訓,石川哲也,北村英男
- Organizer
  日本物理学会春季大会
- Place of Presentation
  立教大学
- Year and Date
  2008-04-27
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 擬一次元Ising 型反強磁性体B_aCo_2V_2O_8の磁場誘起非整合相の観測2008
- Author(s)
  木村尚次郎,松田雅昌,益田隆嗣,本堂英,金子耕士,目時直人,萩原政幸,奥西巧一,鈴木隆史,何長振,谷山智康,伊藤満
- Organizer
  日本物理学会春季大会
- Place of Presentation
  近畿大学
- Year and Date
  2008-04-25
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 3本鎖スピンチューブの量子相転移2008
- Author(s)
  転移坂井徹,奥西巧一,大塚雄一,岡本清美,佐藤正寛,糸井千岳
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  岩手大学
- Year and Date
  2008-09-22
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] Wang-Landau法を用いた擬1次元古典XXZ模型のスピンフロップ転移の解析2008
- Author(s)
  田辺孝行、奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  岩手大学
- Year and Date
  2008-09-23
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 弱い鎖間相互作用を持つS=1/2 反強磁性XXZ スピン鎖の磁場中非整合スピン密度波状態と有限温度転移2008
- Author(s)
  鈴木隆史,川島直輝,奥西巧一
- Organizer
  日本物理学会春季大会
- Place of Presentation
  近畿大学
- Year and Date
  2008-04-25
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 擬1次元XXZ模型における磁場誘起非整合秩序2008
- Author(s)
  奥西巧一
- Organizer
  日本物理学会第63回年次大会
- Place of Presentation
  近畿大学
- Year and Date
  2008-03-25
- Data Source
  KAKENHI-PROJECT-17540317
[Presentation] 3本鎖スピンチューブの磁化過程2007
- Author(s)
  坂井徹,大塚雄一,佐藤正寛,奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  北海道大学
- Year and Date
  2007-09-21
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 三角形量子スピンチューブにおける1次量子相転移2007
- Author(s)
  奥西巧一
- Organizer
  日本物理学会第62回年次大会
- Place of Presentation
  北海道大学
- Year and Date
  2007-09-21
- Data Source
  KAKENHI-PROJECT-17540317
[Presentation] 擬一次元磁性体B_aCo_2V_2O_8 の強磁場比熱2007
- Author(s)
  木村尚次郎,竹内徹也,奥西巧一,鈴木隆史,萩原政幸,何長振,金道浩一,谷山智康,伊藤満
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  北海道大学
- Year and Date
  2007-09-21
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 三角量子スピンチューブにおける1次量子相転移2007
- Author(s)
  奥西巧一
- Organizer
  日本物理学会
- Place of Presentation
  北海道大学
- Year and Date
  2007-09-21
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 三角形量子スピンチューブにおける1次量子相転移2007
- Author(s)
  奥西巧一,佐藤正寛,坂井徹
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  北海道大学
- Year and Date
  2007-09-21
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] Wilson 型実空間くりこみ群とXXZ スピン鎖の低エネルギー励起スペクトル2007
- Author(s)
  奥西巧一
- Organizer
  日本物理学会春季大会
- Place of Presentation
  鹿児島大学
- Year and Date
  2007-03-18
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 擬一次元磁性体B_aCo_2V_2O_8 の強磁場磁性II2007
- Author(s)
  木村尚次郎,八代晴彦,萩原政幸,奥西巧一,何長振,金道浩一,谷山智康,伊藤満
- Organizer
  日本物理学会春季大会
- Place of Presentation
  鹿児島大学
- Year and Date
  2007-03-19
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 正方格子反強磁性S=1/2XXZ モデルにおける磁場中非整合-整合秩序の競合2007
- Author(s)
  鈴木隆史,川島直輝,奥西巧一
- Organizer
  日本物理学会春季大会
- Place of Presentation
  鹿児島大学
- Year and Date
  2007-03-18
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] スピンラダー物質Na_2Fe_2(C_2O_4)_3(H_2O)_2 の強磁場磁化と多周波ESRIII2007
- Author(s)
  山口博則,柏木隆成,木村尚次郎,本多善太郎,山田興治,奥西巧一,金道浩一,萩原政幸
- Organizer
  日本物理学会春季大会
- Place of Presentation
  鹿児島大学
- Year and Date
  2007-03-19
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 擬一次元量子スピンS=1/2XXZ モデルの磁場中秩序状態2007
- Author(s)
  鈴木隆史,川島直輝,奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  北海道大学
- Year and Date
  2007-09-21
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] ジグザグハバード模型のフィリング依存性II2006
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  千葉大学
- Year and Date
  2006-09-24
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] 三本鎖スピンチューブ系における量子相転移の数値的研究2006
- Author(s)
  大塚雄一,奥西巧一,岡本清美,松本宗久,佐藤正寛,坂井徹
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  千葉大学
- Year and Date
  2006-09-23
- Data Source
  KAKENHI-PROJECT-18740230
[Presentation] Guiding Principle of Tensor Renormalization Group with Tensor Decomposition Method
- Author(s)
  Hiroshi Ueda, Kouichi Okunishi, and Tomotoshi Nishino
- Organizer
  25th IUPAP International Conference on Statistical Physics
- Place of Presentation
  Seoul, Korea
- Data Source
  KAKENHI-PROJECT-25800221
[Presentation] 世界線量子モンテカルロ法におけるスナップショットのスペクトル分解II
- Author(s)
  関孝一、奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  中部大学
- Year and Date
  2014-09-07 – 2014-09-10
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] VBS状態のDisentangler II
- Author(s)
  奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  富山大学
- Data Source
  KAKENHI-PROJECT-23540442
[Presentation] SO(N) bilinear-biquadratic スピン鎖の量子臨界性とストリング秩序の数値的研究
- Author(s)
  原田健自，奥西巧一
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  中部大学
- Year and Date
  2014-09-07 – 2014-09-10
- Data Source
  KAKENHI-PROJECT-26400387
[Presentation] 一般化Jordan-Wigner変換とZ2xZ2対称性
- Author(s)
  奥西巧一、原田健二
- Organizer
  日本物理学会秋季大会
- Place of Presentation
  中部大学
- Year and Date
  2014-09-07 – 2014-09-10
- Data Source
  KAKENHI-PROJECT-26400387

1. TONEGAWA Takashi (80028167)

# of Collaborated Projects: 4 results

# of Collaborated Products: 4 results
2. SAKAI Toru (60235116)

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Okunishi Kouichi 奥西 巧一

OKUNISHI Kouichi 奥西 巧一

奥西 功一 オクニシ コウイチ

奥西 巧一 オクニシ コウイチ

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Quantum many-body systems and tensor networks from quantum information perspectivesPrincipal Investigator

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Energy-scale controlling of quantum many-body systems and entanglemet renormalizationPrincipal Investigator

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Entanglement controle in quantum many-body systems by non-local transfromation and negative sign problemPrincipal Investigator

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Quantum entanglement for tensor product states and numerical renormalization groupsPrincipal Investigator

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強磁場の創る新奇スピン秩序状態の理論解析Principal Investigator

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密度行列くりこみ群を用いた強磁場スピン物性の研究Principal Investigator

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renormalization group analysis of the corner HamiltonianPrincipal Investigator

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Okunishi Kouichi 奥西巧一

OKUNISHI Kouichi 奥西巧一

奥西功一オクニシコウイチ

奥西巧一オクニシコウイチ