Analytical mean-field approach to the phase-diagram of ultracold bosons in optical superlattices
| dc.creator | Buonsante, P. | |
| dc.creator | Penna, V. | |
| dc.creator | Vezzani, A. | |
| dc.date | 2004-09-15 | |
| dc.date.accessioned | 2026-07-07T03:00:49Z | |
| dc.date.available | 2026-07-07T03:00:49Z | |
| dc.description | We report a multiple-site mean-field analysis of the zero-temperature phase diagram for ultracold bosons in realistic optical superlattices. The system of interacting bosons is described by a Bose-Hubbard model whose site-dependent parameters reflect the nontrivial periodicity of the optical superlattice. An analytic approach is formulated based on the analysis of the stability of a fixed-point of the map defined by the self-consistency condition inherent in the mean-field approximation. The experimentally relevant case of the period-2 one-dimensional superlattice is briefly discussed. In particular, it is shown that, for a special choice of the superlattice parameters, the half-filling insulator domain features an unusual loophole shape that the single-site mean-field approach fails to capture. | |
| dc.description | 7 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0409385 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0409385 | |
| dc.identifier | Laser Physics 15 (2), 361 (2005) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/24870 | |
| dc.subject | Statistical Mechanics | |
| dc.title | Analytical mean-field approach to the phase-diagram of ultracold bosons in optical superlattices | |
| dc.type | text |