The emergence of charged collective modes from a large N extrapolation of the Hubbard model
| dc.creator | Foerster, D. | |
| dc.creator | Ovchinnikov, A. A. | |
| dc.date | 2001-05-22 | |
| dc.date | 2001-10-10 | |
| dc.date.accessioned | 2026-07-07T02:41:30Z | |
| dc.date.available | 2026-07-07T02:41:30Z | |
| dc.description | We consider a symplectic extrapolation of the Hubbard model of N fold replicated electrons and solve this model exactly in two special cases, at N=infinity in the bosonic sector and for any N on a dimer of two points. At N=infinity we find a multiplet of collective modes that contains neutral spin fluctuations and charged pair fluctuations that are degenerate with each other at zero doping. Our solution of the symplectic model on a dimer of two points for any N interpolates smoothly between N=1 and N=infinity without any visible discontinuity. These results suggest that the inclusion of charged pairing modes in weakly doped antiferromagnets is essential and that an expansion about the N=infinity limit is appropriate in this context. | |
| dc.description | 11 pages, 2 figures. Corrects an error in a previous version of this work and relates our methods with more conventional and mainstream ones | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0105437 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0105437 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/17766 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | The emergence of charged collective modes from a large N extrapolation of the Hubbard model | |
| dc.type | text |