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[文献書誌] Masaaki Nakamura, Johannes Voit: "Lattice twist operators and vertex operators in sine-Gordon theory in one dimension"Physical Review B. 65. 153110-153113 (2002)
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[文献書誌] Masaaki Nakamura, Synge Todo: "Order Parameter to Characterize Valence-Bond-Solid States in Quantum Spin Chains"Physical Review Letters. 89. 077204-077207 (2002)
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[文献書誌] Masaaki Nakamura, Synge Todo: "Novel Order Parameter to Characterize Valence-Bond-Solid States"Progress of Theoretical Physics Supplement. 145. 217-220 (2002)
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[文献書誌] M.Matsumoto, S.Todo, M.Nakamura, C.Yasuda, H.Takayama: "Ground state of antiferromagnetic Heisenberg two-leg ladder in terms of the valence-bond solid picture"Physica B. (発表予定).
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[文献書誌] Masaaki Nakamura: "Identification of topologically different valence bond states in spin ladders"Physica B. (発表予定).