Exact Numerical Solutions of Bose-Hubbard Model  

作　　者：ZHANGDan PANFeng 

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

出　　处：《Communications in Theoretical Physics》2004年第2期183-188,共6页理论物理通讯（英文版）

基　　金：The project supported by National Natural Science Foundation of China under Grant No.10175031;;the Natural Science Foundation of Liaoning Province of China under Grant No.2001101053

摘　　要：Hamiltonian of a one-dimensional Bose–Hubbard model is re-formulated by using differential realization of the boson algebra. Energy matrices can then be generated systematically by using a Mathematica package. The output can be taken as the input of other diagonalization codes. As examples, exact energy eigenvalues and the corresponding wavefunctions for some cases are obtained with a Fortran diagonalization code. Phase transition of the model is analyzed.

关 键 词：INSULATOR SUPERFLUID phase transition phase diagram 

分 类 号：O35[理学—流体力学]