We 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. © 2013 American Physical Society.
Dipolar-induced resonance for ultracold bosons in a quasi-one-dimensional optical lattice / Bartolo, N.; Papoular, D. J.; Barbiero, L.; Menotti, C.; Recati, A.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - ELETTRONICO. - 88:2(2013). [10.1103/PhysRevA.88.023603]
|Titolo:||Dipolar-induced resonance for ultracold bosons in a quasi-one-dimensional optical lattice|
|Data di pubblicazione:||2013|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevA.88.023603|
|Appare nelle tipologie:||1.1 Articolo in rivista|