Effect of Dzyaloshinskii-Moriya interactions on the phase diagram and magnetic excitations of SrCu2(BO3)(2)
Judit Romhanyi; Keisuke Totsuka; Karlo Penc
PHYSICAL REVIEW B, 2011年01月, 査読有り
Supersolid phase of three-dimensional spin- and hardcore-boson models
Hiroaki T. Ueda; Keisuke Totsuka
Physical Review B - Condensed Matter and Materials Physics, 2010年02月25日, 査読有り
Supersolid phase of three-dimensional spin- and hardcore-boson models
Hiroaki T. Ueda; Keisuke Totsuka
PHYSICAL REVIEW B, 2010年02月, 査読有り
Dilute-bose-gas approach to ground state phases of 3D quantum helimagnets under high magnetic field
Ueda, H.T.; Totsuka, K.; Momoi, T.
Journal of Physics: Conference Series, 2010年, 査読有り
Magnon Bose-Einstein condensation and various phases of three-dimensonal quantum helimagnets under high magnetic field
Hiroaki T. Ueda; Keisuke Totsuka
PHYSICAL REVIEW B, 2009年07月, 査読有り
Geometric phases and the magnetization process in quantum antiferromagnets
Akihiro Tanaka; Keisuke Totsuka; Xiao Hu
Physical Review B - Condensed Matter and Materials Physics, 2009年02月17日, 査読有り
Geometric phases and the magnetization process in quantum antiferromagnets
Akihiro Tanaka; Keisuke Totsuka; Xiao Hu
PHYSICAL REVIEW B, 2009年02月, 査読有り
Ground-state phase diagram and magnetic properties of a tetramerized spin- 1 2 J1 - J2 model: BEC of bound magnons and absence of the transverse magnetization
Hiroaki T. Ueda; Keisuke Totsuka
Physical Review B - Condensed Matter and Materials Physics, 2007年12月26日, 査読有り
Ground-state phase diagram and magnetic properties of a tetramerized pin-1/2 J(1)-J(2) model: BEC of bound magnons and absence of the transverse magnetization
Hiroaki T. Ueda; Keisuke Totsuka
PHYSICAL REVIEW B, 2007年12月, 査読有り
Spontaneous trimerization in a bilinear-biquadratic S=1 zig-zag chain
Philippe Corboz; Andreas M. Laeuchli; Keisuke Totsuka; Hirokazu Tsunetsugu
PHYSICAL REVIEW B, 2007年12月, 査読有り
A unifying approach to unconventional orders in frustrated spin systems
K. Totsuka; P. Lecheminant; S. Capponi
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007年03月, 査読有り
The SU(N) self-dual sine-Gordon model and competing orders
P. Lecheminant; K. Totsuka
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2006年12月, 査読有り
Competing orders and hidden duality symmetries in two-leg spin ladder systems
P. Lecheminant; K. Totsuka
PHYSICAL REVIEW B, 2006年12月, 査読有り
Competing orders and hidden duality symmetries in two-leg spin ladder systems
P. Lecheminant; K. Totsuka
Physical Review B - Condensed Matter and Materials Physics, 2006年, 査読有り
Anomalous magnetization of two-dimensional S=1/2 frustrated square-lattice antiferromagnet (CuCl)LaNb2O7
H Kageyama; J Yasuda; T Kitano; K Totsuka; Y Narumi; M Hagiwara; K Kindo; Y Baba; N Oba; Y Ajiro; K Yoshimura
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2005年12月, 査読有り
Phases of the generalized two-leg spin ladder: A view from the SU(4) symmetry
P. Lecheminant; K. Totsuka
Physical Review B - Condensed Matter and Materials Physics, 2005年01月, 査読有り
Phases of the generalized two-leg spin ladder: A view from the SU(4) symmetry
P Lecheminant; K Totsuka
PHYSICAL REVIEW B, 2005年01月, 査読有り
Magnetic excitation of orthogonal dimer heisenberg spin system for SrCu2(BO3)(2)
S Miyahara; K Totsuka; K Ueda
INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2003年11月, 査読有り
Low-lying excitations and magnetization process of coupled tetrahedral systems
K Totsuka; HJ Mikeska
PHYSICAL REVIEW B, 2002年08月, 査読有り
Magnetization process of random quantum spin chains
K Totsuka
PHYSICAL REVIEW B, 2001年10月, 査読有り
The field-induced gap due to four-spin exchange in a spin ladder
A Nakasu; K Totsuka; Y Hasegawa; K Okamoto; T Sakai
JOURNAL OF PHYSICS-CONDENSED MATTER, 2001年08月, 査読有り
Magnetization process of random quantum spin chains
K. Totsuka
Physical Review B - Condensed Matter and Materials Physics, 2001年, 査読有り
Magnetization plateaux and bound states of the Shastry-Sutherland model for SrCu2(BO3)2
Momoi, T.; Totsuka, K.
Canadian Journal of Physics, 2001年, 査読有り
Low-lying magnetic excitation of the Shastry-Sutherland model
K Totsuka; S Miyahara; K Ueda
PHYSICAL REVIEW LETTERS, 2001年01月, 査読有り
Effects of anisotropy and randomness on magnetization plateaus
K Totsuka
PHYSICA B, 2000年07月, 査読有り
Magnetization plateaus in two-dimensional spin systems
T. Momoi; K. Totsuka
Physica B: Condensed Matter, 2000年07月, 査読有り
Magnetization plateaus as insulator-superfluid transitions in quantum spin systems
T Momoi; K Totsuka
PHYSICAL REVIEW B, 2000年02月, 査読有り
Magnetization plateaus of the Shastry-Sutherland model for SrCu2(BO3)2: Spin-density wave, supersolid, and bound states
Momoi, T.; Totsuka, K.
Physical Review B - Condensed Matter and Materials Physics, 2000年, 査読有り
Magnetization plateaus as insulator-superfluid transitions in quantum spin systems
Momoi, T; Totsuka, K
Physical Review B, 2000年, 査読有り
Novel massive ground states of spin chains in a magnetic field
K Totsuka
EUROPEAN PHYSICAL JOURNAL B, 1998年10月, 査読有り
Magnetization plateau in the S=1/2 Heinsenberg spin chain with next-nearest-neighbor and alternating nearest-neighbor interactions
K Totsuka
PHYSICAL REVIEW B, 1998年02月, 査読有り
Magnetization plateau in th Heinsenberg spin chain with next-nearest-neighbor and alternating nearest-neighbor interactions
Keisuke Totsuka
Physical Review B - Condensed Matter and Materials Physics, 1998年, 査読有り
Non-classical magnetization process of quantum spin chains
K Totsuka
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998年01月, 査読有り
Magnetization processes in bond-alternating quantum spin chains
K Totsuka
PHYSICS LETTERS A, 1997年03月, 査読有り
Phase diagram of three-leg spin ladder
K Totsuka; M Suzuki
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1996年07月, 査読有り
THE SPIN-1/2 HEISENBERG SPIN LADDER WITH BOND ALTERNATION
K TOTSUKA; M SUZUKI
JOURNAL OF PHYSICS-CONDENSED MATTER, 1995年07月, 査読有り
ISOTROPIC SPIN-1 CHAINS WITH BOND ALTERNATION - ANALYTIC AND NUMERICAL-STUDIES
K TOTSUKA; Y NISHIYAMA; N HATANO; M SUZUKI
JOURNAL OF PHYSICS-CONDENSED MATTER, 1995年06月, 査読有り
REAL-SPACE RENORMALIZATION-GROUP ANALYSIS OF THE S=2 ANTIFERROMAGNETIC HEISENBERG CHAIN
Y NISHIYAMA; K TOTSUKA; N HATANO; M SUZUKI
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1995年02月, 査読有り
MATRIX FORMALISM FOR THE VBS-TYPE MODELS AND HIDDEN ORDER
K TOTSUKA; M SUZUKI
JOURNAL OF PHYSICS-CONDENSED MATTER, 1995年02月, 査読有り
HIDDEN SYMMETRY-BREAKING IN A GENERALIZED VALENCE-BOND SOLID MODEL
K TOTSUKA; M SUZUKI
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1994年10月, 査読有り
Hidden Order and Dynamiscs of Supersymmetric VBS models(New Development of Numerical Simulations in Low-Dimensional Quantum Systems: From Density Matrix Renormalization Group to Tensor Network Formulations) :
Hasebe Kazuki; Totsuka Keisuke
物性研究, 2011年
A Geometric Approach to Magnetization Plateaus(Topological Aspects of Solid State Physics) :
[要修正]“Symmetry-Protected Topological Orders in 1D - from VBS models to cold fermions,”
Keisuke Totsuka
Dept. of Phys., Kyoto University, March 2013, 2013年, 査読有り
[要修正]Bond-operator approach to phase diagram and low-lying excitations of Shastry-Sutherland model
Keisuke Totsuka
Autumn Meeting of the Physical Society of Japan’, Osaka Prefectural University, Japan 24 September 2010., 2010年, 査読有り
[要修正]Contractor Renormalization Study of 1Dand 2D Spin Systems with Ring-Exchange Interactions
Keisuke Totsuka
Autumn Meeting of the Physical Society of Japan’, Osaka Prefectural University, Japan 25 September 2010., 2010年, 査読有り
[要修正]Hidden order and dynamics of SUSY VBS models
Keisuke Totsuka
New Development of Numerical Simulations in Low-Dimensional Quantum Systems”, Kyoto, Japan October 27-29, 2010., 2010年, 査読有り
[要修正]Possible featureless spin liquids at magnetization plateaus
Keisuke Totsuka
“Unconventional magnetism in High Fields” (Advanced Study Group 2010), Max-Planck Institute for Physics of Complex Systems, Dresden, Germany 4 June 2010., 2010年, 査読有り
[要修正]Supersymmetric VBS models?hidden order and dynamics
Keisuke Totsuka
in “Workshop on Matrix Product State Formulation and Density Matrix Renormalization Group Simulations, Kobe, Japan 12?13 August 2009., 2009年, 査読有り
[要修正]A boson-pairing approach to physics of spin-nematic phases
Keisuke Totsuka
Autumn Meeting of the Physical Society of Japan’, Kumamoto University, Japan 26 September 2009., 2009年, 査読有り
[要修正]Possible featureless spin-liquid phases in high magnetic fields
Keisuke Totsuka
Topological Order: from QUantum Hall Systems to Magnetic Materials”, Max-Planck Institute for Physics of Complex Systems, Dresden, Germany 29 June?24 July 2009., 2009年, 査読有り
[要修正]Magnetic Structures of Frustrated Magnets in High Magnetic Fields ?an approach from magnon BEC
Keisuke Totsuka
in annual meeting of the project “Novel States of Matter Induced by Frustration”, Institute of Solid State Physics, Japan, 7-9 January 2009., 2009年, 査読有り
[要修正]Possible featureless spin liquid states in high magnetic fields ?magnetization plateaus with fractionalized excitations
Keisuke Totsuka
in “Frustration and Spin Liquids”, Kobe University, Japan, 22 December 2008., 2008年, 査読有り
[要修正]Z2-gauge theory approach for spin systems in strong magnetic fields and fractionalization
Keisuke Totsuka
in Autumn Meeting of the Physical Society of Japan’, Iwate University, Japan, 22 September 2008., 2008年, 査読有り
[要修正]Magnon BEC and Unconventional Quantum Orders
Keisuke Totsuka
in “Highly Frustrated Magnetism 2008”, Technical University Brunswick, Germany, 7-12 September 2008., 2008年, 査読有り
[要修正]Geometric approach to magnetization lateaus
Keisuke Totsuka
in “Topological Aspects of Solid State Physics,” Institute of Solid State Physics and Yukawa Institute for Theoretical Physics, Japan, 22?27 June 2008., 2008年, 査読有り
[要修正]A unifying approach to competing orders in frustrated magnets ?an approach from effective Hamiltonians
Keisuke Totsuka
LPTMS Universit´e Paris Sud Orsay, 20 April 2007, Paris, France., 2007年, 査読有り
[要修正]A unifying approach to competing orders in frustrated magnets ?from ladder to square lattice
Keisuke Totsuka
“Interaction and nanostructural effects in low-dimensional systems”, 5-30 November 2007, Kyoto, Japan., 2007年, 査読有り
[要修正]Effects of 4-spin interactions in generalized spin ladders -global phase structure and quantum phase transitions
K. Totsuka; P. Lecheminant
"International Symposium on Quantum Spin Systems (QSS04)” Nov.30-Dec.3, 2004, Shonan, Japan., 2004年, 査読有り
[要修正]Competing orders and hidden symmetry in spin ladder systems
K. Totsuka; P. Lecheminant
Yukawa International Seminar 2004 ”Physics of Strongly Correlated Electron Systems”, Nov.1- Nov.19, 2004 Kyoto, Japan., 2004年, 査読有り
"Realizing symmetry-protected topological phases with SU(N) ultra-cold fermions"
Keisuke Totsuka
"Novel Quantum States in Condensed Matter 2014", YITP Kyoto, November 14, 2014
"Symmetry-protected topological Mott insulators of ultra-cold fermions in one dimension"
Keisuke Totsuka
"Topology and Entanglement in Correlated Quantum Systems", MPIPKS Dresden, August 2, 2014
"Symmetry-protected topological Mott phases of ultra-cold fermions in one dimension"
Keisuke Totsuka
"New Horizon of Strongly-Correlated Physics", ISSP, July 2, 2014
"Symmetry-protected topological phases of alkaline-earth ultra-cold fermionic atoms in one dimension"
Keisuke Totsuka
STATPHYS25, Seoul, July 25, 2013
"SU(N)冷却原子を用いたトポロジカル相の実現 - エンタングルメントと非局所秩序 "
戸塚圭介
基研研究会「量子制御技術の発展により拓かれる量子情報の新時代」, 7月16日, 2015
"Spin-liquid magnetization plateaus in high magnetic field"
戸塚圭介
基研研究会「量子スピン系の物理」, 11月14日, 2012
講演・口頭発表等
SU(N) Kondo lattice model --ferromagnetism and supersymmetry
Keisuke Totsuka
SU(N) physics in condensed matter and cold atoms, 2022年05月10日, 招待有り
Designing topological gauge theories with quantum wires
Keisuke Totsuka
Entanglement in Strongly Correlated Systems, 2021年02月25日, 招待有り
Symmetry-protected topological phases with ultra-cold SU(N) fermions
Keisuke Totsuka
The Third Asia-Pacific workshop on Quantum Magnetism, 2019年11月29日, 招待有り
Symmetry-protected topological phases with ultra-cold SU(N) fermions
Keisuke Totsuka
The Fourth Kyoto-Beijing-Tokyo Workshop on Ultracold Atomic Gases, 2019年10月02日, 招待有り
Bulk properties and fluctuations in coupled-wire construction of Abelian topological phases
Keisuke Totsuka
seminar at Technical University Munich, Germany, 2019年07月10日, 招待有り
Lecture on 2D conformal field theories --a survival kit for condensed-matter physicists
Keisuke Totsuka
series of lectures at KAIST, Korea, 招待有り
Hunt for symmetry-protected topological phases in SU(N) ultra-cold fermions in double-well optical lattices
Keisuke Totsuka
Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts (BEC2018X), 2018年12月12日, 招待有り
Hunt for symmetry-protected topological phases in SU(N) ultra-cold fermions in one-dimensional optical lattices
Keisuke Totsuka
seminar at National Center for Theoretical Sciences, Taiwan, 2018年11月14日, 招待有り
Emergence of topological gauge theories from coupled arrays of wires
Keisuke Totsuka
seminar at Okinawan Institute of Technologies, 2018年10月11日, 招待有り
Symmetry-protected topological phases with broken parity in cold fermions in a double-well optical lattice
Quantum Cryptographic Primitives with Certified Everlasting Security(Certified Everlasting安全な量子暗号)
廣岡 大河, 理学研究科, 副査
2025年03月24日
A study on antiferromagnetic spin-1 chains coupled to environments:the ground-state properties and the computational power of mixed states(環境と結合した反強磁性的スピン1鎖の研究:基底状態の性質と混合状態の計算能力)
増井 陸, 理学研究科, 主査
2024年09月24日
Theoretical Study of Invertible States Using Matrix Product States(テンソルネットワークを用いた可逆状態の理論的研究)
大山 修平, 理学研究科, 副査
2024年03月25日
Quantum algorithm for persistent Betti numbers and topological data analysis(パーシステント・ベッチ数およびトポロジカルデータ解析に関する量子アルゴリズム)
早川 龍, 理学研究科, 副査
2024年03月25日
Geometric Method for Solvable Lattice Spin Systems(可解格子スピン系に対する幾何学的手法)
小倉 将紘, 理学研究科, 副査
2023年03月23日
Systematic construction methods of exactly analyzable models in low dimensions (厳密に解析できる低次元模型の系統的な構成方法)