Now showing items 1-3 of 3

  • One-dimensional Bose gas in optical lattices of arbitrary strength 

    Astrakharchik, Grigori; Krutitsky, K.V.; Lewenstein, Maciej; Mazzanti Castrillejo, Fernando Pablo (2016-02-08)
    Article
    Open Access
    One-dimensional Bose gas with contact interaction in optical lattices at zero temperature is investigated by means of the exact diffusion Monte Carlo algorithm. The results obtained from the fundamental continuous model ...
  • Optical lattices as a tool to study defect-induced superfluidity 

    Astrakharchik, Grigori; Krutitsky, K.V.; Lewenstein, Maciej; Mazzanti Castrillejo, Fernando Pablo; Boronat Medico, Jordi (AMER PHYSICAL SOC, 2017-09-05)
    Article
    Open Access
    We study the superfluid response, the energetic and structural properties of a one-dimensional ultracold Bose gas in an optical lattice of arbitrary strength. We use the Bose-Fermi mapping in the limit of infinitely large ...
  • Phase diagram of quasi-two-dimensional bosons in a laser-speckle potential 

    Astrakharchik, Grigori; Krutitsky, K.V.; Navez, Patrick (2013-06)
    Article
    Open Access
    We have studied the phase diagram of a quasi-two-dimensional interacting Bose gas at zero temperature in the presence of random potential created by laser speckles. The superfluid fraction and the fraction of particles ...