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

  Articoli su Riviste JCR/ISI  (anno 2013)

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

Affiliazione Autori:  INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy; Laboratoire Charles Coulomb, CNRS, Université Montpellier 2, Montpellier, France; Dipartimento di Fisica e Astronomia “Galileo Galilei”, Universita di Padova, Padova, Italy; Laboratoire de Physique Théorique, CNRS, Université de Toulouse, Toulouse, France

Riassunto:  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.

Rivista/Giornale:  PHYSICAL REVIEW A
Volume n.:  88 (2)      Pagine da: 023603  a: 023603
Ulteriori informazioni:  We acknowledge stimulating discussions with M. Baranov, G. Ferrari, L. P. Pitaevskii, G. V. Shlyapnikov, S. Stringari, and W. Zwerger. L. B. acknowledges the hospitality of the BEC Center, Trento, during the initial stage of the project. This work has been supported by ERC through a QGBE grant and by Provincia Autonoma di Trento.
DOI: 10.1103/PhysRevA.88.023603

*Impact Factor della Rivista: (2013) 2.991   *Citazioni: 22
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  12/05/2019

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