Conservation of the spectral moments in the n-pole approximation
| dc.creator | Mancini, F. | |
| dc.date | 1998-03-23 | |
| dc.date.accessioned | 2026-07-07T03:10:11Z | |
| dc.date.available | 2026-07-07T03:10:11Z | |
| dc.description | A formulation of the Green's function method is presented in the n-pole approximation. Without referring to a specific model we give a general scheme of calculations that easily permits the computation of the "single-particle" Green's function in terms of the energy matrix. A theorem is proved which states that the moments of the spectral density function are conserved up to the order 2(n-l+1), where l is the order of the composite field. A comparison with the spectral density approach is also discussed. | |
| dc.description | 12 pages, RevTeX | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9803276 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9803276 | |
| dc.identifier | Physics Letters A 249, 231 (1998) | |
| dc.identifier | doi:10.1016/S0375-9601(98)00728-2 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28162 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | Conservation of the spectral moments in the n-pole approximation | |
| dc.type | text |