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arXiv · 0808.4143

Adiabaticity and localization in one-dimensional incommensurate lattices

E. E. Edwards·M. Beeler·Tao Hong·S. L. Rolston
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Abstract

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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E. E. Edwards, M. Beeler, Tao Hong, S. L. Rolston. 2008-10-13. Adiabaticity and localization in one-dimensional incommensurate lattices. https://doi.org/10.1103/physrevlett.101.260402

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