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Towards a Bose-Glass of ultracold atoms in a disordered crystal of light

L. Fallani·J. E. Lye·V. Guarrera·C. Fort·M. Inguscio
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Abstract

Starting from one-dimensional Mott Insulators, we use a bichromatic optical lattice to add controlled disorder to an ideal optical crystal where bosonic atoms are pinned by repulsive interactions. Increasing disorder, we observe a broadening of the Mott Insulator resonances and the transition to an insulating state with a flat density of excitations, suggesting the formation of a Bose-Glass.

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L. Fallani, J. E. Lye, V. Guarrera, C. Fort, M. Inguscio. 2006-11-13. Towards a Bose-Glass of ultracold atoms in a disordered crystal of light. https://arxiv.org/abs/cond-mat/0603655

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