ヤマダ　ヒロフミ   Hirofumi Yamada   山田　宏文    所属   千葉工業大学  情報変革科学部 教育センター（情報変革科学部）    職種   教授
言語種別	英語
発行・発表の年月	2012/12
形態種別	学術雑誌
査読	査読あり
標題	Continuum Limit of Susceptibility from Strong Coupling Expansion: Two-Dimensional Nonlinear O(N) Sigma Model at N>=3
執筆形態	単著
掲載誌名	Brazilian Journal of Physics
出版社・発行元	Springer-Verlag
巻・号・頁	42(5-6),pp.445-451
概要	On the basis of a strong-coupling expansion, we reinvestigate the scaling behavior of the susceptibility χ of the two-dimensional O(N) sigma model on the square lattice with Padé–Borel approximants. To exploit the Borel transform, we express the bare coupling g in a series expansion in χ. For large N, the Padé–Borel approximants exhibit scaling behavior at the four-loop level. We estimate the nonperturbative constant associated with the susceptibility for N ≥ 3 and compare the results with previous analytica l results and Monte Carlo data.
DOI	10.1007/s13538-012-0098-6