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