Pure Mott phases in confined ultracold atomic systems

Details Pure Mott phases in confined ultracold atomic systems Pure Mott phases in confined ultracold atomic systems

2009-09-18

arxiv.org/abs/0909.3543v2

Phys. Rev. Lett 104, 167201 (2010)

Physics

Condensed Matter

Quantum Gases

4 Pages, 6 figures

Scientific paper

10.1103/PhysRevLett.104.167201

We propose a novel scheme for confining atoms to optical lattices by engineering a spatially-inhomogeneous hopping matrix element in the Hubbard-model (HM) description, a situation we term off-diagonal confinement (ODC). We show, via an exact numerical solution of the boson HM with ODC, that this scheme possesses distinct advantages over the conventional method of confining atoms using an additional trapping potential, including the presence of incompressible Mott phases at commensurate filling and a phase diagram that is similar to the uniform HM. The experimental implementation of ODC will thus allow a more faithful realization of correlated phases of interest in cold atom experiments.

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