Unconventional pairing phases in the two-dimensional attractive Hubbard model with population imbalance
| dc.creator | Rombouts, Stefan M. A. | |
| dc.date | 2009-02-09 | |
| dc.date.accessioned | 2026-07-07T12:39:29Z | |
| dc.date.available | 2026-07-07T12:39:29Z | |
| dc.description | The ground state phase diagram of the two-dimensional attractive Hubbard model with population imbalance is explored using a mean field ansatz. A linear programming algorithm is used to identify the blocked states, such that the population imbalance can be imposed exactly. This allows to explore regions of the number-projected phase diagram that can not be obtained with the conventional Bogoliubov-de Gennes ansatz. The Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) phase of pairs with non-zero momentum is found to be the ground state over a wide range of parameters, while phase separation occurs only in a limited region at small population imbalance. Through a particle-hole transformation these results can be related to the underdoped repulsive Hubbard model, where the FFLO phase takes the form of a particle-hole condensate that exhibits a spontaneous restoration of spin symmetry. | |
| dc.description | 3 figures | |
| dc.identifier | https://arxiv.org/abs/0902.1450 | |
| dc.identifier | http://arxiv.org/abs/0902.1450 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/219130 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Unconventional pairing phases in the two-dimensional attractive Hubbard model with population imbalance | |
| dc.type | text |