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EnglishWe study the role of the dipolar-induced resonance (DIR) in a quasi-one-dimensional system of ultracold bosons. We first describe the effect of the DIR on two particles in a harmonic trap. Then, we consider a deep optical lattice loaded with ultracold dipolar bosons. In order to describe this system, we introduce a novel atom-dimer extended Bose-Hubbard model, which is the minimal model correctly accounting for the DIR. We analyze the impact of the DIR on the phase diagram at T=0 by exact diagonalization of a small-sized system. We show that the DIR strongly affects this phase diagram. In particular, we predict the mass density wave to occur in a narrow domain corresponding to weak nearest-neighbor interactions, and we predict the occurrence of a collapse phase for stronger dipolar interactions.
| Titolo: | Dipolar-induced resonance for ultracold bosons in a quasi-one-dimensional optical lattice | |
| Autori: | Bartolo, Nicola; Papoular, David Jonathanrenaud; Barbiero, Luca; C., Menotti; Recati, Alessio | |
| Autori Unitn: | ||
| Titolo del periodico: | PHYSICAL REVIEW A | |
| Anno di pubblicazione: | 2013 | |
| Codice identificativo Scopus: | 2-s2.0-84883620534 | |
| Codice identificativo WOS: | WOS:000322784100005 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevA.88.023603 | |
| Handle: | http://hdl.handle.net/11572/34734 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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