Strong-Coupling Phases of Frustrated Bosons on a 2-leg Ladder with Ring Exchange
| dc.creator | Sheng, D. N. | |
| dc.creator | Motrunich, Olexei I. | |
| dc.creator | Trebst, Simon | |
| dc.creator | Gull, Emanuel | |
| dc.creator | Fisher, Matthew P. A. | |
| dc.date | 2008-05-02 | |
| dc.date.accessioned | 2026-07-07T09:58:04Z | |
| dc.date.available | 2026-07-07T09:58:04Z | |
| dc.description | Developing a theoretical framework to access quantum phases of itinerant bosons or fermions in two dimensions (2D) that exhibit singular structure along surfaces in momentum space but have no quasi-particle description remains as a central challenge in the field of strongly correlated physics. In this paper we propose that distinctive signatures of such 2D strongly correlated phases will be manifest in quasi-one-dimensional "N-leg ladder" systems. Characteristic of each parent 2D quantum liquid would be a precise pattern of 1D gapless modes on the N-leg ladder. These signatures could be potentially exploited to approach the 2D phases from controlled numerical and analytical studies in quasi-1D. As a first step we explore itinerant boson models with a frustrating ring exchange interaction on the 2-leg ladder, searching for signatures of the recently proposed two-dimensional d-wave correlated Bose liquid (DBL) phase. A combination of exact diagonalization, density matrix renormalization group, variational Monte Carlo, and bosonization analysis of a quasi-1D gauge theory, all provide compelling evidence for the existence of a new strong-coupling phase of bosons on the 2-leg ladder which can be understood as a descendant of the two-dimensional DBL. We suggest several generalizations to quantum spin and electron Hamiltonians on ladders which could likewise reveal fingerprints of such 2D non-Fermi liquid phases. | |
| dc.description | 22 pages, 15 figures | |
| dc.identifier | https://arxiv.org/abs/0805.0255 | |
| dc.identifier | http://arxiv.org/abs/0805.0255 | |
| dc.identifier | Phys. Rev. B 78, 054520 (2008). | |
| dc.identifier | doi:10.1103/PhysRevB.78.054520 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/167579 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | Strong-Coupling Phases of Frustrated Bosons on a 2-leg Ladder with Ring Exchange | |
| dc.type | text |