EQSE Diagonalization of the Hubbard Model

Details EQSE Diagonalization of the Hubbard Model EQSE Diagonalization of the Hubbard Model

2000-08-30

arxiv.org/abs/cond-mat/0008458v1

Nucl.Phys.Proc.Suppl. 90 (2000) 202-204

Physics

Condensed Matter

5 pages, to appear in the proceedings of the International Light-Cone Meeting on Non-Perturbative QCD and Hadron Phenomenology

Scientific paper

10.1016/S0920-5632(00)00897-5

The application of enhanced quasi-sparse eigenvector methods (EQSE) to the Hubbard model is attempted. The ground state energy for the 4x4 Hubbard model is calculated with a relatively small set of basis vectors. The results agree to high precision with the exact answer. For the 8x8 case, exact answers are not available but a simple first order correction to the quasi-sparse eigenvector (QSE) result is presented.

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