Nested Bethe Ansatz for Spin Ladder Model with Open Boundary Conditions

The nested Bethe ansatz (BA) method is applied to find the eigenvalues and the eigenvectors of the transfer matrix for spin-ladder model with open boundary conditions. Based on the reflection equation, we find the general diagonal solution, which determines the generalboundary interaction in the Hamiltonian. We introduce the spin-ladder model with open boundary conditions. By finding the solution K± of the reflection equation which determines the nontrivial boundary terms in the Hamiltonian, we diagonalize the transfer matrix of the spin-ladder model with open boundary conditions in the framework of nested BA.

作 者： WU Jun-fang ZHANG Chun-min YUE Rui-Hong LI Run-Ling   作者單位： WU Jun-fang(Department of Physics, Xi'an Jiao Tong University, Xi'an 710049, China;Department of Physics, Xi'an University of Engineering Science and Technology, Xi'an 710048, China)

ZHANG Chun-min(Department of Physics, Xi'an Jiao Tong University, Xi'an 710049, China)

YUE Rui-Hong(Institute of Modern Physics, Northwest University, Xi'an 710069, China)

LI Run-Ling(Missile Institute, Air Force Engineering University, Xi'an 710051, China) 

刊 名： 理論物理通訊（英文版）  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2005 43(4)  分類(lèi)號(hào)：   關(guān)鍵詞： integrable model   coordinate Bethe ansatz   quantum inverse scattering method   Bethe ansatz equation   nested Bethe ansatz  

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