Deconfinement in a 2D optical lattice of coupled 1D boson systems

Abstract

We show that a two-dimensional (2D) array of 1D interacting boson tubes has a deconfinement transition between a 1D Mott insulator and a 3D superfluid for commensurate fillings and a dimensional crossover for the incommensurate case. We determine the phase diagram and excitations of this system and discuss the consequences for Bose condensates loaded in 2D optical lattices.

4 pages, 1 fig. Revision: simplified presentation of results

References in corpus (2)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Bosonizing one-dimensional cold atomic gases

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• One-dimensional phase transitions in a two-dimensional optical lattice
• From frustrated insulators to correlated anisotropic metals: charge ordering and quantum criticality in coupled chain systems
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• Deconfinement and cold atoms in optical lattices