Dipolar-induced resonance for ultracold bosons in a quasi-one-dimensional optical lattice

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]

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Titolo: Dipolar-induced resonance for ultracold bosons in a quasi-one-dimensional optical lattice
Autori: 
BARBIERO, LUCA
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Data di pubblicazione: 2013
Rivista: 
PHYSICAL REVIEW A  
Digital Object Identifier (DOI): http://dx.doi.org/10.1103/PhysRevA.88.023603
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