Mott-insulator phase of coupled 1D atomic gases in a 2D optical lattice

D. M. Gangardt 1, P. Pedri 2, 3, 4, L. M.N.B.F. Santos 2, 3, G. V. Shlyapnikov 1, 5

Physical Review Letters 96 (2006) 040403

We discuss the 2D Mott insulator (MI) state of a 2D array of coupled finite size 1D Bose gases. It is shown that the momentum distribution in the lattice plane is very sensitive to the interaction regime in the 1D tubes. In particular, we find that the disappearance of the interference pattern in time of flight experiments will not be a signature of the MI phase, but a clear consequence of the strongly interacting Tonks-Girardeau regime along the tubes.

  • 1. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud
  • 2. Institut für Theoretische Physik III,
    Universität Stuttgart
  • 3. Institut für Theoretische Physik,
    Universität Hannover
  • 4. Dipartimento di Fisica,
  • 5. Van der Waals-Zeeman Institute,
    University of Amsterdam