Adiabaticity and localization in one-dimensional incommensurate lattices
Atomic Physics
2009-11-13 v2
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.
Keywords
Cite
@article{arxiv.0808.4143,
title = {Adiabaticity and localization in one-dimensional incommensurate lattices},
author = {E. E. Edwards and M. Beeler and Tao Hong and S. L. Rolston},
journal= {arXiv preprint arXiv:0808.4143},
year = {2009}
}
Comments
4 pages, 3 figures; v2: figures improved (particularly fig 3), some refs. added, clarifications in discussion, fixed typos