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for journal 'PTPS'
author 'K.* Okunishi' : 7
total : 7

Search Results : 7 articles were found.

  1. Progress of Theoretical Physics Supplement No.145 (2002) pp. 52-57 : (2)
    First-Order Phase Transitions in Frustrated Spin Systems
    Akihisa Koga, Akira Kawaguchi, Kouichi Okunishi and Norio Kawakami
  2. Progress of Theoretical Physics Supplement No.145 (2002) pp. 119-124 : (2)
    Cusp Singularity in the Magnetization Curve of 1D Quantum Spin Systems
    Kouichi Okunishi
  3. Progress of Theoretical Physics Supplement No.145 (2002) pp. 204-207 : (2)
    Matrix Product State Approximation for the Maximum-Eigenvalue Eigenstate of the Quantum Transfer Matrix
    Nobuya Maeshima, Yasuhiro Hieida, Tomotoshi Nishino and Kouichi Okunishi
  4. Progress of Theoretical Physics Supplement No.159 (2005) pp. 77-81 : (2)
    Finite-Field Ground State of an $S = 1$ Anisotropic Antiferromagnetic Chain
    Takashi Tonegawa, Kouichi Okunishi, Tôru Sakai and Makoto Kaburagi
  5. Progress of Theoretical Physics Supplement No.159 (2005) pp. 158-162 : (2)
    Effect of Staggered Field on the Magnetization Process of $S = 1/2$ Antiferromagnetic Chains
    Akira Matsuo, Kohei Hosokawa, Yasuo Narumi, Kouichi Okunishi, Nobuya Maeshima, Takayuki Asano, Yoshitami Ajiro, Naoyuki Ishida, Takashi Nogami and Koichi Kindo
  6. Progress of Theoretical Physics Supplement No.159 (2005) pp. 251-255 : (2)
    Magnetization Plateau of $S = 1$ Spin Ladder BIP-TENO
    Munehisa Kikuchi, Kiyomi Okamoto, Kouichi Okunishi and Tôru Sakai
  7. Progress of Theoretical Physics Supplement No.159 (2005) pp. 297-301 : (2)
    Low-Energy Excitations of the $S = 1/2$ Quantum Spin Tube with the Triangular Lattice Structure
    Kouichi Okunishi, Shin-ichiro Yoshikawa, Tôru Sakai and Seiji Miyashita