M. Larcher, C. Menotti, B. Tanatar, P. Vignolo
We study the localization properties of a test dipole feeling the disordered potential induced by dipolar impurities trapped at random positions in an optical lattice. This random potential is marked by correlations which are a convolution of short-range and long-range ones. We show that when short-range correlations are dominant, extended states can appear in the spectrum. The effect of long-range correlations is to restore localization over the whole spectrum and to enhance or reduce localization at the band center, depending on the localization regime determined by short-range correlations.
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http://arxiv.org/abs/1303.5605
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