1303.3130 (N. Bartolo et al.)

Dipolar-Induced Resonance for Ultracold Bosons in a Quasi-1D Optical
Lattice    [PDF]

N. Bartolo, D. J. Papoular, L. Barbiero, C. Menotti, A. Recati

We study the role of the dipolar interaction, correctly accounting for the Dipolar-Induced Resonance (DIR), in a quasi-one-dimensional system of ultracold bosons. We first show how the DIR affects the lowest-energy states of two particles in a harmonic trap. Then, we consider a deep optical lattice loaded with ultracold dipolar bosons. We describe this many-body system using an atom-dimer extended Bose-Hubbard model. We analyze the impact of the DIR on the phase diagram at T=0 by exact diagonalization of a small-sized system. In particular, the resonance strongly modifies the range of parameters for which a mass density wave should occur.

View original: http://arxiv.org/abs/1303.3130