3D Anderson Localization in Variable-Scale Speckle Potentials

Anderson localization in three dimensions is controlled by the interplay between a particle's Boltzmann mean free path and its wavelength. We extend our measurement of 3D Anderson localization in an interaction-free, ultracold Fermi gas by varying the mean free path through changes in the correlation length of the disordered potential. The potential is created using optical speckle, and the correlation length is varied over a factor of five. We determine how the correlation length affects the mobility edge and the length scale of localization.