Extended Recursion in Operator Space (EROS), a new impurity solver for the single impurity Anderson model
| dc.creator | Julien, Jean-Pierre | |
| dc.creator | Albers, R. C. | |
| dc.date | 2008-10-20 | |
| dc.date.accessioned | 2026-07-07T10:11:30Z | |
| dc.date.available | 2026-07-07T10:11:30Z | |
| dc.description | We have developed a new efficient and accurate impurity solver for the single impurity Anderson model (SIAM), which is based on a non-perturbative recursion technique in a space of operators and involves expanding the self-energy as a continued fraction. The method has no special occupation number or temperature restrictions; the only approximation is the number of levels of the continued fraction retained in the expansion. We also show how this approach can be used as a new approach to Dynamical Mean Field Theory (DMTF) and illustrate this with the Hubbard model. The three lowest orders of recursion give the Hartree-Fock, Hubbard I, and Hubbard III approximations. A higher level of recursion is able to reproduce the expected 3-peak structure in the spectral function and Fermi liquid behavior. | |
| dc.description | 4 pages, 3 figures submitted to PRL | |
| dc.identifier | https://arxiv.org/abs/0810.3302 | |
| dc.identifier | http://arxiv.org/abs/0810.3302 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/171883 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | Extended Recursion in Operator Space (EROS), a new impurity solver for the single impurity Anderson model | |
| dc.type | text |