Adiabaticity and localization in one-dimensional incommensurate lattices

Details Adiabaticity and localization in one-dimensional incommensurate lattices Adiabaticity and localization in one-dimensional incommensurate lattices

2008-08-29

arxiv.org/abs/0808.4143v2

Physics

Atomic Physics

4 pages, 3 figures; v2: figures improved (particularly fig 3), some refs. added, clarifications in discussion, fixed typos

Scientific paper

10.1103/PhysRevLett.101.260402

We experimentally investigate the role of localization on the adiabaticity of loading a Bose-Einstein condensate into a one-dimensional optical potential comprised of a shallow primary lattice plus one or two perturbing lattice(s) of incommensurate period. We find that even a very weak perturbation causes dramatic changes in the momentum distribution and makes adiabatic loading of the combined lattice much more difficult than for a single period lattice. We interpret our results using a band structure model and the one-dimensional Gross-Pitaevskii equation.

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