数理解析研究所講究録
正俊 今田
量子一次元スピン系とGel'fand Levitan問題(ソリトンと統計物理学)
Masatoshi Imada
量子コンピュータのハードウェア最前線(学生/教養のページ)
勇人 中ノ
Yang-Baxter関係式とその応用(ソリトンと統計物理学)
Miki Wadati, Kiyoshi Sogo, M. Uchinami +1 more
量子系のエントロピ-と光通信 (エントロピ-と量子力学 )
昇 渡辺
三樹 和達, 清 十河, 守 打波 +1 more
Gel'fand Levitan Method for Quantum Spin Systems
The quantum Gel'fand Levitan method is formulated for the Ising-like Heisenberg Ising spin chain. The solution of the Gel'fand Levitan equation makes it possible to express the spin operators in terms of the creation and the annihilation operators of Bethe's eigenstates. The spin operators are expressed by the normal product expansion and the lowest order term is explicitly calculated.