Transition from a two-dimensional superfluid to a one-dimensional Mott insulator |
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Authors: | Bergkvist Sara Rosengren Anders Saers Robert Lundh Emil Rehn Magnus Kastberg Anders |
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Affiliation: | Department of Theoretical Physics, Royal Institute of Technology, AlbaNova, SE-106 91 Stockholm, Sweden. |
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Abstract: | A two-dimensional system of atoms in an anisotropic optical lattice is studied theoretically. If the system is finite in one direction, it is shown to exhibit a transition between a two-dimensional superfluid and a one-dimensional Mott insulating chain of superfluid tubes. Monte Carlo simulations are consistent with the expectation that the phase transition is of Kosterlitz-Thouless type. The effect of the transition on experimental time-of-flight images is discussed. |
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