Researcher Profile and Settings

Researcher

• Name

  HIKIHARA Toshiya

Profile and Settings

• Name

  Hikihara, Toshiya

Affiliation

• Gunma University, Associate Professor

Degree

• Doctor of Science

Research Experience

• Apr. 2014, 9999, Gunma University, Graduate School of Science and Technology
• Apr. 2013, Mar. 2014
• Apr. 2011, Mar. 2013
• Apr. 2007, Mar. 2011, Hokkaido University, Faculty of Science, Department of Physics
• Apr. 2006, Mar. 2007, Hokkaido University, Faculty of Science, Department of Physics
• Sep. 2004, Mar. 2006
• Apr. 2003, Aug. 2004, RIKEN
• Apr. 2001, Mar. 2003, National Institute for Materials Science
• Jan. 1999, Mar. 2001

Research Activities

Research Areas

• Natural sciences, Mathematical physics and basic theory

Research Interests

• condensed-matter physics
• low-dimensional quantum spin systems
• low-dimensional strongly correlated electron systems
• numerical calculation

Published Papers

• Automatic structural optimization of tree tensor networks, Toshiya Hikihara, Hiroshi Ueda, Kouichi Okunishi, Kenji Harada, and Tomotoshi Nishino, 23 Jan. 2023, Physical Review Research, 5, 1, 013031-1, 013031-11, Scientific journal

  DOI
• Frustration-induced Quantum Spin Liquid Behavior in the s = 1/2 Random-bond Heisenberg Antiferromagnet on the Zigzag Chain, Kazuki Uematsu, Toshiya Hikihara, and Hikaru Kawamura, 09 Nov. 2021, Journal of the Physical Society of Japan, 90, 124703-1, 124703-10, Scientific journal

  DOI
• Entanglement-based tensor-network strong-disorder renormalization group, Kouichi Seki, Toshiya Hikihara, and Kouichi Okunishi, 08 Oct. 2021, Physical Review B, 104, 134405-1, 134405-9, Scientific journal

  DOI
• Magnetoelastic study on the frustrated quasi-one-dimensional spin-1/2 magnet LiCuVO4, A. Miyata, T. Hikihara, S. Furukawa, R. K. Kremer, S. Zherlitsyn, and J. Wosnitza, 08 Jan. 2021, Physical Review B, 103, 1, 014411-1, 014411-8

  DOI
• Tensor-network strong-disorder renormalization groups for random quantum spin systems in two dimensions, Kouichi Seki, Toshiya Hikihara, and Kouichi Okunishi, 26 Oct. 2020, Physical Review B, 102, 14, 144439-1, 144439-9

  DOI
• Spin nematics in frustrated spin-dimer systems with bilayer structure, Toshiya Hikihara,Takahiro Misawa,Tsutomu Momoi, Dec. 2019, Physical Review B, 100, 214414, Scientific journal
• Quantum phase transitions beyond Landau-Ginzburg theory in one-dimensional space revisited, Christopher Mudry,Akira Furusaki,Takahiro Morimoto,Toshiya Hikihara, May 2019, Physical Review B, 99, 205153-1, 205153-22, Scientific journal
• Ground-State Phase Diagram of an Anisotropic S=1/2 Ladder with Different Leg Interactions, Tonegawa Takashi,Hikihara Toshiya,Okamoto Kiyomi,Furuya Shunsukc C,Sakai Toru, 15 Oct. 2018, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 87, 10

  DOI
• Dimer correlation amplitudes and dimer excitation gap in spin-1/2 XXZ and Heisenberg chains, Toshiya Hikihara,Akira Furusaki,Sergei Lukyanov, Oct. 2017, PHYSICAL REVIEW B, 96, 13, 134429, Scientific journal

  DOI
• Exact Ground States of Frustrated Quantum Spin Systems Consisting of Spin-Dimer Units, Toshiya Hikihara,Takashi Tonegawa,Kiyomi Okamoto,Toru Sakai, May 2017, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86, 5, 54709, Scientific journal

  DOI
• Edge magnetism of Heisenberg model on honeycomb lattice, Wen-Min Huang,Toshiya Hikihara,Yen-Chen Lee,Hsiu-Hau Lin, Mar. 2017, SCIENTIFIC REPORTS, 7, 43678, Scientific journal

  DOI
• Frustrated S=1/2 Two-Leg Ladder with Different Leg Interactions, Takashi Tonegawa,Kiyomi Okamoto,Toshiya Hikihara,Toru Sakai, 2017, Journal of Physics: Conference Series, 828, 12003
• Ground-state phase diagram of an anisotropic S=1/2 ladder with alternating rung interactions, Takashi Tonegawa,Kiyomi Okamoto,Toshiya Hikihara,Tom Sakai, 2016, TMU INTERNATIONAL SYMPOSIUM ON NEW QUANTUM PHASES EMERGING FROM NOVEL CRYSTAL STRUCTURE, 683, 12039, International conference proceedings

  DOI
• Spin-Nematic and Spin-Density-Wave Orders in Spatially Anisotropic Frustrated Magnets in a Magnetic Field, Masahiro Sato,Toshiya Hikihara,Tsutomu Momoi, Feb. 2013, PHYSICAL REVIEW LETTERS, 110, 7, 77206, Scientific journal

  DOI
• Long-distance entanglement in one-dimensional quantum systems under sinusoidal deformation, Hikihara\, Toshiya,Suzuki\, Takafumi, 2013, PHYSICAL REVIEW A, 87, 4, 42337

  DOI
• Sine-square deformation of free fermion systems in one and higher dimensions, Isao Maruyama,Hosho Katsura,Toshiya Hikihara, Oct. 2011, PHYSICAL REVIEW B, 84, 16, 165132, Scientific journal

  DOI
• Connecting distant ends of one-dimensional critical systems by a sine-square deformation, Toshiya Hikihara,Tomotoshi Nishino, Feb. 2011, PHYSICAL REVIEW B, 83, 6, 060414(R) (4 pages), Scientific journal

  DOI
• Field and temperature dependence of NMR relaxation rate in the magnetic quadrupolar liquid phase of spin-12 frustrated ferromagnetic chains, Sato\, M.,Hikihara\, T.,Momoi\, T., 2011, Physical Review B - Condensed Matter and Materials Physics, 83, 6, 064405 (10 pages), Scientific journal

  DOI
• NMR relaxation rate in the field-induced octupolar liquid phase of spin-1/2 J 1-J 2 frustrated chains, Sato\, M.,Hikihara\, T.,Momoi\, T., 2011, Journal of Physics: Conference Series, 320, 012014, Scientific journal

  DOI
• Phase diagram of the frustrated spin ladder, Toshiya Hikihara,Oleg A. Starykh, Feb. 2010, PHYSICAL REVIEW B, 81, 6, 064432 (12 pages), Scientific journal

  DOI
• Magnetic phase diagram of the spin- 1 2 antiferromagnetic zigzag ladder, Hikihara\, T.,Momoi\, T.,Furusaki\, A.,Kawamura\, H., 2010, Physical Review B - Condensed Matter and Materials Physics, 81, 22, 224433 (20 pages), Scientific journal

  DOI
• Ferromagnetism in armchair graphene nanoribbons, Hsiu-Hau Lin,Toshiya Hikihara,Horng-Tay Jeng,Bor-Luen Huang,Chung-Yu Mou,Xiao Hu, Jan. 2009, PHYSICAL REVIEW B, 79, 3, 035405 (9 pages), Scientific journal

  DOI
• Magnetic phase diagram of spin-1/2 two-leg ladder with four-spin ring exchanges, Toshiya Hikihara,Shoji Yamamoto, Jan. 2008, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77, 1, 014709 (9 pages), Scientific journal

  DOI
• Vector chiral and multipolar orders in the spin-1/2 frustrated ferromagnetic chain in magnetic field, Hikihara\, T.,Kecke\, L.,Momoi\, T.,Furusaki\, A., 2008, Physical Review B, 78, 14, 144404 (19 pages), Scientific journal

  DOI
• Spin coupling in zigzag Wigner crystals, A. D. Klironomos,J. S. Meyer,T. Hikihara,K. A. Matveev, Aug. 2007, PHYSICAL REVIEW B, 76, 7, 075302 (11 pages), Scientific journal

  DOI
• Spin dynamics in molecular ring nanomagnets: Significant effect of acoustic phonons and magnetic anisotropies, Shoji Yamamoto,Toshiya Hikihara, Oct. 2006, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 75, 10, 103701 (4 pages), Scientific journal

  DOI
• Renormalization of impurity scattering in one-dimensional interacting electron systems in magnetic field, T Hikihara,A Furusaki,KA Matveev, Jul. 2005, PHYSICAL REVIEW B, 72, 3, 035301 (10 pages), Scientific journal

  DOI
• Interplay among spin, orbital and lattice degrees of freedom in t(2g) electron systems with edge-sharing network of octahedra, Y Motome,H Tsunetsugu,T Hikihara,N Shannon,K Penc, 2005, PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 159, 159, 314, 318, Scientific journal

  DOI
• Duality relations and exotic orders in electronic ladder systems, T. Momoi,T. Hikihara, 2005, J. Phys. Soc. Jpn., 74 Suppl., 226, 233
• Phase transitions in spin-orbital coupled model for pyroxene titanium oxides, T. Hikihara,Y. Motome, 2005, J. Phys. Soc. Jpn., 74 Suppl., 212, 215
• Orbital and spin interplay in spin-gap formation in pyroxene ATiSi(2)O(6) (A=Na,Li), T Hikihara,Y Motome, Dec. 2004, PHYSICAL REVIEW B, 70, 21, 214404 (12 pages), Scientific journal

  DOI
• Scalar chiral order in spin ladders with four-spin exchanges, T Momoi,T Hikihara,M Nakamura, May 2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 914, 915, Scientific journal

  DOI
• Boundary contributions to specific heat and susceptibility in the spin-1/2 XXZ chain, A. Furusaki,T. Hikihara, 2004, Phys. Rev. B, 69, 094429 (5 pages)
• Correlation Amplitudes for the spin-1/2 XXZ chain in a magnetic field, T. Hikihara,A. Furusaki, 2004, Phys. Rev. B, 69, 064427 (11 page)
• Numerical renormalization study on magnetic properties of edge states in carbon nanotubes, T Hikihara,Hu\, X, May 2003, PHYSICA B-CONDENSED MATTER, 329, 1166, 1167, Scientific journal

  DOI
• Exact duality relations in correlated electron systems, T. Momoi,T. Hikihara, 2003, Phys. Rev. Lett., 91, 256405 (4 page)
• Dynamical Structure Factor in Cu Benzoate and other spin-1/2 antiferromagnetic chains, F.H.L. Essler,A. Furusaki,T.Hikihara, 2003, Phys. Rev. B, 68, 064410 (5 page)
• Ground-state properties of nanographite systems with zigzag edges, T.Hikihara,X. Hu,H.-H. Lin,C.-Y. Mou, 2003, Phys. Rev. B, 68, 035432 (9 page)
• Scalar chiral ground states of spin ladders with four-spin exchanges, T.Momoi,T.Hikihara,M. Nakamura,X.Hu, 2003, Phys. Rev. B, 67, 174410 (8 page)
• Spin-chirality duality in a spin ladder with four-spin cyclic exchange, T.Hikihara,T.Momoi,X.Hu, 2003, Phys. Rev. Lett., 90, 087204 (4 page)
• An S=1/2 impurity spin in the antiferromagnetic S=1 bond-alternating chain, N Ogawa,T Hikihara,M Kaburagi,T Tonegawa, 2002, PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 145, 145, 156, 169, Scientific journal
• Ground-State Phase Diagram of Frustrated Anisotropic Quantum Spin Chain, Toshiya Hikihara,Makoto Kaburagi,Hikaru Kawamura, 2002, Prog. Theor. Phys. Suppl., 145, 58, 63
• Ground State Phase Diagram of Frustrated Antiferromagnetic S = 1 Chain with Uniaxial Single-Ion-Type Anisotropy, T.Hikihara, 2002, J. Phys. Soc. Jpn., 71, 319, 325

  DOI
• Chiral order of spin-1/2 frustrated quantum spin chains, T Hikihara,M Kaburagi,H Kawamura, Nov. 2001, CANADIAN JOURNAL OF PHYSICS, 79, 11-12, 1587, 1591, Scientific journal

  DOI
• Chiral-ordered phases in a frustrated S=1 chain with uniaxial single-ion-type anisotropy, T Hikihara, Nov. 2001, CANADIAN JOURNAL OF PHYSICS, 79, 11-12, 1593, 1597, Scientific journal

  DOI
• Ground state of an Ising-type spin-1/2 chain with competing interactions, T Tonegawa,H Matsumoto,T Hikihara,M Kaburagi, Nov. 2001, CANADIAN JOURNAL OF PHYSICS, 79, 11-12, 1581, 1585, Scientific journal

  DOI
• Ground state of a quantum mixed spin-1/2-1/2-1-1 chain with uniaxial single-ion-type anisotropy, T Tonegawa,T Hikihara,M Kaburagi, May 2001, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 226, 420, 422, Scientific journal
• Finite-field ground state of an antiferromagnetic spin-1/2 chain with competing interactions, T Tonegawa,T Hikihara,K Okamoto,M Kaburagi, Jan. 2001, PHYSICA B, 294, 39, 42, Scientific journal

  DOI
• Ground state of an S=1/2 distorted diamond chain in a finite magnetic field, T Tonegawa,K Okamoto,T Hikihara,Y Takahashi,M Kaburagi, Jan. 2001, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 62, 1-2, 125, 128, Scientific journal

  DOI
• Ground State Phase Diagrams of Frustrated Spin-S XXZ chains : Chiral Ordered Phases, T.Hikihara,M.Kaburagi,H.Kawamura, 2001, Phys. Rev. B, 63, 174430 (11 page)
• Spin correlations in the two-leg antiferromagnetic ladder in a magnetic field, T.Hikihara,A.Furusaki, 2001, Phys. Rev. B, 63, 134438 (11 page)
• Ground State Properties of an S=1/2 Distorted Diamond Chain, T.Tonegawa,K.Okamoto,T.Hikihara,Y.Takahashi,M.Kaburagi, 2000, J. Phys. Soc. Jpn., 69, Suppl.A, 332, 338
• Ground-State Phase Diagram of the Spin-1/2-1/2-1-1 Chain, T.Hikihara,T.Tonegawa,M.Kaburagi,T.Nishino,S.Miyashita,H.-J. Mikeska, 2000, J. Phys. Soc. Jpn., 69, 1207, 1218

  DOI
• Ground State Phase Diagram of Frustrated S=1 XXZ chains : Chiral Ordered Phases, T.Hikihara,M.Kaburagi,H.Kawamura,T.Tonegawa, 2000, J. Phys. Soc. Jpn., 69, 259, 266

  DOI
• Numerical renormalization-group study of spin correlations in one-dimensional random spin chains, T Hikihara,A Furusaki,M Sigrist, Nov. 1999, PHYSICAL REVIEW B, 60, 17, 12116, 12124, Scientific journal

  DOI
• Density matrix renormalization group: Introduction from a variational point of view, T Nishino,T Hikihara,K Okunishi,Y Hieida, Jan. 1999, INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 13, 1, 1, 24
• Spin and chiral orderings of frustrated quantum spin chains, M.Kaburagi,H.Kawamura,T.Hikihara, 1999, J. Phys. Soc. Jpn., 68, 3185, 3188

  DOI
• Fixed Point of the Finite System DMRG, H.Takasaki,T.Hikihara,T.Nishino, 1999, J. Phys. Soc. Jpn., 68, 1537, 1540

  DOI
• One-dimensional Heisenberg antiferromnagnet in which two S=1/2 and two S=1 spins are arranged alternatively, T Tonegawa,T Hikihara,T Nishino,M Kaburagi,S Miyashita,HJ Mikeska, Jan. 1998, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 177, 647, 649, Scientific journal

  DOI
• Correlation amplitude for the S=1/2 XXZ spin chain in the critical region : Numerical renormalization-group study of an open chain, T.Hikihara,A.Furusaki, 1998, Phys. Rev. B, 58, R583-R586

  DOI
• Kondo effect in XXZ spin chain, A.Furusaki,T.Hikihara, 1998, Phys. Rev. B, 58, 5529, 5538

  DOI
• Ground-state and thermodynamic properties of the quantum mixed spin 1/2-1/2-1-1 chain, T.Tonegawa,T.Hikihara,M.Kaburagi,T.Nishino,S.Miyashita,H.-J. Mikeska, 1998, J. Phys. Soc. Jpn., 67, 1000, 1013

  DOI

MISC

• DENSITY-MATRIX RENORMALIZATION GROUP METHOD FOR TOMONAGA-LUTTINGER LIQUID, Toshiya Hikihara, 2012, FRONTIERS IN QUANTUM INFORMATION RESEARCH: DECOHERENCE, ENTANGLEMENT, ENTROPY, MPS AND DMRG, 4, 265, 280
• Density-Matrix Renormalization Group Method for Tomonaga-Luttinger Liquid, Toshiya Hikihara, 2012, Kinki University Series on Quantum Computing vol.4, Frontiers in Quantum Information Research, ed. M. Nakahara and S. Tanaka, World Scientific, 265, 280
• エネルギー・スケール変調による量子系の境界条件・トポロジーの制御, 引原俊哉,桂法称,丸山勲,西野友年, 2012, 67, 6, 394, 398

Books etc

• ライブラリ物理の演習しよう5 演習しよう物理数学, 2016
• ライブラリ物理の演習しよう6 演習しよう振動・波動, 2017

Presentations

• 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, 引原俊哉, 上田宏, 奥西巧一, 原田健自, 西野友年, 日本物理学会第79回年次大会（2024年）, 18 Sep. 2024, 16 Sep. 2024, 19 Sep. 2024, Japanese, Japan, Domestic conference
• Tree tensor network approaches for quantum many-body systems with quenched randomness, Toshiya Hikihara, YIPQS long-term workshop Quantum Information, Quantum Matter and Quantum Gravity, 28 Sep. 2023, English, Japan, International conference
• Visualization of Entanglement Geometry by Structural Optimization of Tree Tensor Network, Toshiya Hikihara, Hiroshi Ueda, Kouichi Okunishi, Kenji Harada, Tomotoshi Nishino, CCP2023 - 34th IUPAP Conference on Computational Physics, 05 Aug. 2023, English, Japan, International conference
• Structural optimization of tree tensor networks, T. Hikihara, Tensor Network States: Algorithms and Applications 2023, 21 Aug. 2023, English, Shanhai, China, International conference
• 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II, 引原俊哉, 上田宏, 奥西巧一, 原田健自, 西野友年, 日本物理学会2023年春季大会, 23 Mar. 2023, 22 Mar. 2023, 25 Mar. 2023, Japanese, Japan, Domestic conference
• ランダム量子スピン系に対するテンソルネットワーク数値計算法の開発, 引原俊哉, 第１８回量子スピン系研究会, 17 Dec. 2022, 16 Dec. 2022, 17 Dec. 2022, Japanese, Japan, Domestic conference
• 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, 引原俊哉, 上田宏, 奥西巧一, 原田健自, 西野友年, 日本物理学会2022年秋季大会, 13 Sep. 2022, 12 Sep. 2022, 15 Sep. 2022, Japanese, Domestic conference
• Entanglement-based algorithm of the tensor-network strong-disorder renormalization group, Toshiya Hikihara, YITP international workshop, Quantum Information Entropy in Physics, 23 Mar. 2022, 21 Mar. 2022, 25 Mar. 2022, Japan, International conference
• Frustrated random-singlet state in the s=1/2 random-bond Heisenberg antiferromagnet on the zigzag chain, Toshiya Hikihara, Kazuki Uematsu, and Hikaru Kawamura, The International Conference on Frustration, Topology and Spin Textures (ICFTS), 22 Dec. 2021, International conference
• ジグザグ梯子格子上のS=1/2ランダムハイゼンベルグ模型におけるフラストレート・ランダムシングレット状態, 引原俊哉, 第１６回量子スピン系研究会, 18 Dec. 2021, Domestic conference
• Frustrated random-singlet state in the random-bond J1-J2 spin chain, Toshiya Hikihara, Kazuki Uematsu, and Hikaru Kawamura, 2021 JPS Annual (76th) Meeting, 15 Mar. 2021, 12 Mar. 2021, 15 Mar. 2021, Domestic conference
• Ground-state phase diagram and low-temperature propertiesof the random-bond J1-J2 spin chain, Kazuki Uematsu, Toshiya Hikihara, and Hikaru Kawamura, 2021 JPS Annual (76th) Meeting, 15 Mar. 2021, 12 Mar. 2021, 15 Mar. 2021, Domestic conference
• Magnetostriction measurement of the quasi-one-dimensional frustrated spin-1/2 magnet LiCuVO4 under magnetic field, T. Hikihara, A. Miyata, S. Furukawa, R. K. Kremer, S. Zherlitsyn, and J. Wosnitza, 15th Symposium of quantum spin systems, 05 Jan. 2021, 05 Jan. 2021, 05 Jan. 2021, Domestic conference
• Magnetostriction of the quasi-one-dimensional frustrated spin-1/2 magnet LiCuVO4, T. Hikihara, A. Miyata, S. Furukawa, R. K. Kremer, S. Zherlitsyn, and J. Wosnitza, FYR02 QLC meeting, 22 Dec. 2020, 21 Dec. 2020, 25 Dec. 2020, Domestic conference
• spin-1/2 J1-J2 XYZ 鎖における非GL的量子臨界相転移, 引原俊哉,Christopher Mudry,古崎昭,森本高裕, 日本物理学会2019年秋季大会, 12 Sep. 2019, Japanese, Domestic conference
• 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, 関孝一,引原俊哉,奥西巧一, 日本物理学会2019年秋季大会, 11 Sep. 2019, Japanese, Domestic conference
• フラストレート・スピンダイマー系におけるスピンネマティック秩序状態の多変数変分モンテカルロ法による解析, 三澤貴宏,引原俊哉,桃井勉, 日本物理学会2019年秋季大会, 11 Sep. 2019, Japanese, Domestic conference
• 様々なエネルギースケール変換による一次元量子系の特性変化, 引原 俊哉, 研究会「サイン2 乗変形（SSD）とその周辺2019」, 11 Jul. 2019, Japanese, Domestic conference
• 二次元ランダム量子スピン系に対する実空間繰り込み群法の改良と性能評価, 関孝一,引原俊哉,奥西巧一, 日本物理学会第74回年次大会（2019年）, 15 Mar. 2019, Japanese, Domestic conference
• 二次元ランダム量子スピン系解析のための実空間繰り込み群法の改良, 引原 俊哉,関孝一,奥西巧一, 基研研究会 スピン系物理の最前線, 02 Nov. 2018
• 量子モンテカルロ法を用いたランダム量子スピン系の実空間繰り込み群法の性能評価, 関孝一,引原俊哉,奥西巧一, 日本物理学会2018年秋季大会, 12 Sep. 2018, Japanese, Domestic conference
• 2次元フラストレート・スピンダイマー系におけるスピンネマティック秩序状態の変分法による解析, 引原 俊哉,桃井勉, 日本物理学会2018年秋季大会, 10 Sep. 2018
• Ground States in an Anisotropic S=1/2 Ladder with Different Leg Interactions, HIKIHARA Toshiya,T. Tonegawa,K. Okamoto,S. Furuya,T. Sakai, International Conference on Magnetism 2018, 17 Jul. 2018
• 脚相互作用が異なった異方的 S=1/2 ２本脚ラダーの基底状態相図 IV, 利根川孝,岡本清美,古谷峻介,引原俊哉,坂井徹, 日本物理学会第73回年次大会（2018年）, 23 Mar. 2018, Japanese, Domestic conference
• 脚相互作用が異なった異方的 S=1/2 2本脚ラダーの基底状態：ボソン化, 古谷峻介,利根川孝,岡本清美,引原俊哉,坂井徹, 日本物理学会2017年秋季大会, 21 Sep. 2017, Japanese, Domestic conference
• 脚相互作用が異なった異方的 S=1/2 2本脚ラダーの基底状態：数値計算, 利根川孝,古谷峻介,岡本清美,引原俊哉,坂井徹, 日本物理学会2017年秋季大会, 21 Sep. 2017, Japanese, Domestic conference
• 脚相互作用が異なった異方的 S=1/2 2本脚ラダーの基底状態相図 III, 利根川孝,引原俊哉,岡本清美,坂井徹, 日本物理学会第72回年次大会（2017年）, 11 Mar. 2017, Japanese, Domestic conference
• Spin-nematic ordering in two- and three-dimensional frustrated quantum magnets composed of spin dimers, Junjiro Kanamori Memorial International Symposium, 2017
• SSD and other energy deformations, Workshop on Sine square deformation and related topics, 2017
• S=1/2反強磁性ハイゼンベルグ鎖におけるダイマー相関振幅とボンド交替による励起ギャップ, 日本物理学会2017年秋季大会, 2017
• 強磁性ダイマーからなる2次元フラストレート量子スピン系におけるスピンネマティック秩序状態, 日本物理学会2017年秋季大会, 2017
• ランダム量子スピン系解析のための実空間繰り込み群法の改良 II, 日本物理学会第72回年次大会, 2017
• Generation of 2D AKLT and related entangled states, The 75th Okazaki Conference, Tensor Network States: Algorithms and Applications 2016, 2016
• Bell-Bond-Solid状態, 日本物理学会2016年秋季大会, 2016
• ランダム量子スピン系解析のための実空間繰り込み群法の改良, 日本物理学会2016年秋季大会, 2016
• 一次元フラストレート量子スピン系におけるカイラリティ・スピン多極子秩序, 量子スピン系研究会, 2016
• フラストレート量子スピン系における厳密基底状態, 量子スピン系研究会, 2016
• Generation of 2D AKLT and related entangled states, The 75th Okazaki Conference, Tensor Network States: Algorithms and Applications 2016, 2016
• 2つのS=1/2スピンをユニットとしたフラストレート量子スピン系の厳密基底状態, 日本物理学会第71回年次大会, 2016
• Quantum-state engineering in quantum many-body systems, 物性理論・統計力学セミナー2015, 2015
• 制御性の高い量子多体系における二次元Affleck-Kennedy-Lieb-Tasaki 状態の生成, 基礎物理学研究所研究会「量子制御技術の発展により拓かれる量子情報の新時代」, 2015
• サイン変形系の量子情報論的操作への応用, 基礎物理学研究所研究会「量子情報の新展開」- 複雑性の極限における 普遍的物理の探求-, 2014
• 量子情報論的操作によるAffleck-Lieb-Kennedy-Tasaki 状態の生成, 日本物理学会2014年秋季大会, 2014
• Entanglement generation via one-dimensional quantum systems under sinusoidal deformation, ISSP international symposium, Emergent Quantum Phases in Condensed Matter (EQPCM2013), 2013
• Sinusoidal deformation and its applications, Statistical Physics of Quantum Matter (satellite conference of StatPhys25), 2013
• 磁場中擬一次元フラストレート強磁性体におけるスピン多極子相, 量子スピン系研究会, 2013
• サイン変形を施した一次元量子多体系における長距離エンタングルメントの生成, 日本物理学会第68回年次大会, 2013
• サイン変形を施した一次元量子多体系の両端qubit間に発生する長距離エンタングルメント, 量子情報技術研究会（QIT28）, 2013
• Controlling entanglement distribution and Engineering quantum many-body states- Be ambitious, yet realistic -, 強相関電子系理論の最前線- 若手によるオープン・イノベーション-, 2013
• 量子スピン系研究におけるエンタングルメント, 量子スピン系研究会, 2012
• 量子多体系におけるエンタングルメント：はじめに, 日本物理学会2012年秋季大会、 領域11，領域1合同シンポジウム 「量子多体系におけるエンタングルメント」, 2012
• 量子スピン系研究とエンタングルメント, 基研研究会「量子スピン系の物理」, 2012
• 量子多体系研究における境界効果の効用, 強相関電子系理論の最前線 - 若手によるオープン・イノベーション -, 2012
• サイン二乗変形を施した量子スピン系における長距離エンタングルメント, 日本物理学会2012年 秋季大会, 2012
• 二次元量子系におけるサイン二乗変形の効果, 2012
• 一次元量子臨界系における sine-square deformation の効果, 日本物理学会2011年 秋季大会, 2011
• 磁場中フラストレート強磁性スピン鎖におけるカイラル相・スピン多極子相とその観測可能性, 強相関電子系理論の最前線- 若手によるオープン・イノベーション-, 2011
• Entanglement entropy in 1D critical system with open boundaries and sinusoidal deformation, New Development of Numerical Simulations in Low-Dimensional Quantum Systems: From Density Matrix Renormalization Group to Tensor Network Formulations, 2010
• Columnar dimer phase in the frustrated spin ladder, International conference Highly Frustrated Magnetism 2010 (HFM2010), 2010
• Entanglement entropy in 1D critical system with open boundaries and sinusoidal deformation, New Development of Numerical Simulations in Low-Dimensional Quantum Systems: From Density Matrix Renormalization Group to Tensor Network Formulations, 2010
• Columnar dimer phase in the frustrated spin ladder, International conference Highly Frustrated Magnetism 2010 (HFM2010), 2010
• フラストレートした２本鎖梯子量子スピン系におけるColumnar dimer相, 日本物理学会第65回年次大会, 2010
• S=1/2 XXZ 量子スピン鎖におけるダイマー相関関数振幅, 日本物理学会2010年秋季大会, 2010
• DMRG for Tomonaga-Luttinger liquids, Workshop on Matrix Product State Formulation and Density Matrix Renormalization Group Simulations (MPS and DMRG), 2009
• 新手法開発の現状 -- MERAを中心に --, 日本物理学会2009年秋季大会, 2009
• DMRG for Tomonaga-Luttinger liquids, Workshop on Matrix Product State Formulation and Density Matrix Renormalization Group Simulations (MPS and DMRG), 2009
• アームチェア・ナノグラファイトリボンにおける平坦バンド遍歴強磁性, 日本物理学会第64回年次大会, 2009
• DMRGによる相関関数の解析, 基研研究会「密度行列繰り込み群法を用いた物性研究の新展開」, 2008
• Novel quantum states in a frustrated ferromagnetic chain under a magnetic field, 科研費特定領域研究 「フラストレーションが創る新しい物性」 第１回トピカルミーティング「フラストレート新規物質」, 2008
• フラストレーションをもつ最近接強磁性＝次近接反強磁性ジグザグスピン鎖の磁気相図, 日本物理学会第63回年次大会, 2008
• 最近接・次近接相互作用がフラストレートしたジグザグ梯子量子スピン系の磁気相図, 日本物理学会2008年秋季大会, 2008
• 最近接・次近接相互作用をもつジグザグ梯子量子スピン鎖の磁気相図, 科研費特定領域研究 「フラストレーションが創る新しい物性」 第３回トピカルミーティング「フラストレーションとスピン液体」, 2008

Research Projects

• Apr. 2019, Principal investigator, Competitive research funding
• Apr. 2010, Mar. 2012, Competitive research funding
• Apr. 2009, Mar. 2012, Principal investigator, Competitive research funding
• Apr. 2006, Mar. 2008, Principal investigator, Competitive research funding
• Apr. 2004, Mar. 2007, Principal investigator, Competitive research funding
• Apr. 2012, Mar. 2015, Principal investigator, Competitive research funding
• Apr. 2015, Principal investigator, Competitive research funding
• Apr. 2017, Competitive research funding