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Shoji Yamamoto
Researcher at Hokkaido University
Publications - 254
Citations - 8420
Shoji Yamamoto is an academic researcher from Hokkaido University. The author has contributed to research in topics: Heisenberg model & Antiferromagnetism. The author has an hindex of 38, co-authored 247 publications receiving 8091 citations. Previous affiliations of Shoji Yamamoto include Niihama National College of Technology & Okayama University.
Papers
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Journal ArticleDOI
Orbital Optimization in the Resonating Hartree-Fock Approximation and Its Application to the One Dimensional Hubbard Model
TL;DR: In this article, a tractable direct optimization algorithm is developed to optimize orbitals in the Slater determinants (S-dets) in a resonating Hartree-Fock (Res HF) wave function.
Journal ArticleDOI
Multiplateau magnetization curves of one-dimensional Heisenberg ferrimagnets
Shoji Yamamoto,Tôru Sakai +1 more
TL;DR: In this paper, the ground-state magnetization curves of ferrimagnetic Heisenberg chains of alternating spins S and s were numerically investigated and it was shown that the spin-S,s$ chain generally exhibits $2s$ magnetization plateaus even at the most symmetric point.
Journal ArticleDOI
Search for neutral Q-balls in super-Kamiokande II
Y. Takenaga,Ke. Abe,Y. Hayato,T. Iida,K. Ishihara,J. Kameda,Yusuke Koshio,A. Minamino,C. Mitsuda,M. Miura,S. Moriyama,Masayuki Nakahata,Y. Obayashi,H. Ogawa,Masato Shiozawa,Yasunari Suzuki,Atsushi Takeda,Y. Takeuchi,K. Ueshima,Hiroshi Watanabe,S. Yamada,I. Higuchi,C. Ishihara,Masaki Ishitsuka,T. Kajita,K. Kaneyuki,G. Mitsuka,S. Nakayama,H. Nishino,Ko Okumura,C. Saji,Y. Totsuka,S. Clark,Shantanu Desai,F. Dufour,A. Herfurth,E. Kearns,S. Likhoded,Michael Litos,J. L. Raaf,J. L. Stone,Lawrence Sulak,W. Wang,M. Goldhaber,David William Casper,J. P. Cravens,J. Dunmore,J. Griskevich,W. R. Kropp,D. W. Liu,S. Mine,C. Regis,M. B. Smy,H. W. Sobel,M. R. Vagins,K. S. Ganezer,J. Hill,W. E. Keig,J. S. Jang,J. Y. Kim,I. T. Lim,Kate Scholberg,N. Tanimoto,C. W. Walter,R. A. Wendell,R. W. Ellsworth,Shigeki Tasaka,E. Guillian,John G. Learned,S. Matsuno,M. D. Messier,A. K. Ichikawa,T. Ishida,T. Ishii,T. Iwashita,T. Kobayashi,T. Nakadaira,K. Nakamura,K. Nishikawa,K. Nitta,Yuichi Oyama,A. T. Suzuki,Makoto Hasegawa,H. Maesaka,Tsuyoshi Nakaya,Takuya Sasaki,Hiroshi Sato,Shoji Yamamoto,Masashi Yokoyama,T. J. Haines,Steven Dazeley,S. Hatakeyama,R. Svoboda,G. W. Sullivan,R. Gran,Alec Habig,Y. Fukuda,T. Sato,Y. Itow,Y. Itow,T. Koike,T. Koike,C. K. Jung,T. Kato,Ken-ichiro Kobayashi,C. McGrew,A. Sarrat,R. Terri,C. Yanagisawa,N. Tamura,Makoto Sakuda,M. Sugihara,Y. Kuno,Michitoshi Yoshida,S. B. Kim,B. S. Yang,T. Ishizuka,H. Okazawa,Y. Choi,H. Seo,Y. Gando,Takehisa Hasegawa,Kunio Inoue,H. Ishii,K. Nishijima,Hirokazu Ishino,Y. Watanabe,M. Koshiba,Song Chen,Zhi Deng,Yueh-Feng Liu,D. Kielczewska,H. G. Berns,K. K. Shiraishi,Eric Thrane,K. Washburn,R. J. Wilkes +136 more
TL;DR: A search for Q-balls has been carried out in Super-Kamiokande II with 541.7 days of live time as mentioned in this paper, but no candidate for successive contained event groups has been found.
Journal ArticleDOI
Quantum Monte Carlo approach to elementary excitations of antiferromagnetic Heisenberg chains.
Journal ArticleDOI
High-speed tangentially viewing soft x-ray camera to study magnetohydrodynamic fluctuations in toroidally confined plasmas (invited)
TL;DR: In this paper, a high-speed tangentially viewing soft x-ray camera system has been developed and installed on the large helical device (LHD) using a video camera with a maximum framing rate of 13.5 kHz.