Towards a Bose-Glass of ultracold atoms in a disordered crystal of light
arXiv:cond-mat/0603655
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.
4 pages, 5 figures