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.
Titolo: | New comparisons for local quantities of the two-dimensional Hubbard model |
Autori: | |
Data di pubblicazione: | 2003 |
Rivista: | |
Abstract: | 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. |
Handle: | http://hdl.handle.net/11386/1064229 |
Appare nelle tipologie: | 1.1.2 Articolo su rivista con ISSN |
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