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Effect of interactions on the localization of a Bose-Einstein condensate in a quasi-periodic lattice

J. E. Lye·L. Fallani·C. Fort·V. Guarrera·M. Modugno·D. S. Wiersma·M. Inguscio
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Abstract

The transport properties of a Bose-Einstein condensate in a 1D incommensurate bichromatic lattice are investigated both theoretically and experimentally. We observe a blockage of the center of mass motion with low atom number, and a return of motion when the atom number is increased. Solutions of the Gross-Pitaevskii equation show how the localization due to the quasi-disorder introduced by the incommensurate bichromatic lattice is affected by the interactions.

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J. E. Lye, L. Fallani, C. Fort, V. Guarrera, M. Modugno, D. S. Wiersma, M. Inguscio. 2006-11-06. Effect of interactions on the localization of a Bose-Einstein condensate in a quasi-periodic lattice. https://doi.org/10.1103/physreva.75.061603

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