2009/01/02 by Michele Modugno · 2 citations
Physics and Astronomy · #cond-mat.other
paper · pdf · doi:10.1088/1367-2630/11/3/033023
published as New Journal of Physics 11 (2009) 033023 · 13 pages, 6 figures
arxiv created 2009/01/02 · arxiv updated 2015/02/26
We investigate the localization properties of a one-dimensional bichromatic optical lattice in the tight binding regime, by discussing how exponentially localized states emerge upon changing the degree of commensurability. We also review the mapping onto the discrete Aubry-Andre' model, and provide evidences on how the momentum distribution gets modified in the crossover from extended to exponentially localized states. This analysis is relevant to the recent experiment on Anderson localization of a noninteracting Bose-Einstein condensate in a quasiperiodic optical lattice [G. Roati et al., Nature 453, 895 (2008)].