New Comparisons for Local Quantities of the Two-Dimensional Hubbard Model

Details New Comparisons for Local Quantities of the Two-Dimensional Hubbard Model New Comparisons for Local Quantities of the Two-Dimensional Hubbard Model

2002-09-30

arxiv.org/abs/cond-mat/0209673v1

Int. J. Mod. Phys. B 17, 554 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures

Scientific paper

10.1142/S0217979203016224

We have compared the results of our approximation scheme, the composite
operator method, for the double occupancy and the internal energy of the
two-dimensional Hubbard model with numerical data obtained by means of the
Lanczos and quantum Monte Carlo schemes. The agreement is very good at both
half-filling and away from it showing how reliable is the approximation scheme.

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