Unified Solutions of the Hard—Core Fermi—and Bose—Hubbard Models  

作　　者：DAILian－Rong PANFeng 

机构地区：[1]DepartmentofPhysics,LiaoningNormalUniversity,Dalian116029,China

出　　处：《Communications in Theoretical Physics》2003年第4期469-472,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金，辽宁省教育厅资助项目

摘　　要：A unified algebraic approach to both the hard-core Fermi- and Bose-Hubbard models is extended to boththe finite- and infinite-site with periodic condition cases. Excitation energies and the corresponding wavefunctions ofboth the models with nearest neighbor hopping are exactly derived by using a new and simple algebraic method. It isfound that spectra of both the models are determined simply by eigenvalue problem of N × N hopping matrix, where Nis the number of sites for finite system or the period of sites for infinite system.

关 键 词：激发光谱 数值计算 特征值问题 Fermi-Hubbard模型 BOSE-HUBBARD模型 

分 类 号：O433[机械工程—光学工程] O411[理学—光学]