Ground-state energy of the Hubbard model: Cluster-perturbative results

Article

关键词: T-J MODEL;    EXACT DIAGONALIZATION;    CORRELATED ELECTRONS;    FERMION SYSTEMS;    LATTICE MODELS;    ANTIFERROMAGNETS;   

DOI  :  10.1103/PhysRevB.57.8755

来源: SCIE

【 摘 要 】

When electron correlations are important it is often necessary to use numerical methods to solve the Hamiltonian for a finite system (cluster) exactly. Unfortunately, such methods are restricted to small systems. We propose to combine the exact numerical diagonalization for small clusters with the perturbative calculations to take into account the intracluster as well as intercluster interactions. [S0163-1829(98)03915-0].

【 授权许可】

Free