Single-site entanglement at superconductor-insulator transition in the Hirsch model
| dc.creator | Anfossi, Alberto | |
| dc.creator | Boschi, Cristian Degli Esposti | |
| dc.creator | Montorsi, Arianna | |
| dc.creator | Ortolani, Fabio | |
| dc.date | 2005-03-24 | |
| dc.date | 2007-03-19 | |
| dc.date.accessioned | 2026-07-07T07:52:15Z | |
| dc.date.available | 2026-07-07T07:52:15Z | |
| dc.description | We investigate the transition to the insulating state in the one-dimensional Hubbard model with bond-charge interaction x (Hirsch model), at half-filling and T=0. By means of the density-matrix renormalization group algorithm the charge gap closure is examined by both standard finite size scaling analysis and looking at singularities in the derivatives of single-site entanglement. The results of the two techniques show that a quantum phase transition takes place at a finite Coulomb interaction u_c(x) for x>0.5. The region 0<u<u_c turns out to have a superconducting nature, at least for not too large x>x_c. | |
| dc.description | 5 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0503600 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0503600 | |
| dc.identifier | Phys. Rev B 73, 085113 (2006) | |
| dc.identifier | doi:10.1103/PhysRevB.73.085113 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/125811 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Quantum Physics | |
| dc.title | Single-site entanglement at superconductor-insulator transition in the Hirsch model | |
| dc.type | text |