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Anderson localization of Bogoliubov excitations is studied for disordered lattice Bose gases in planar quasi-one-dimensional geometries. The inverse localization length is computed as function of energy by a numerical transfer-matrix scheme, for strips of different widths. These results are described accurately by analytical formulas based on a weak-disorder expansion of backscattering mean free paths.
Riccardo Rattazzi, Alexander Monin, Gil Badel
Benoît Marie Joseph Deveaud, Marcia Portella Oberli, Yoan Léger, Maxime Richard, Verena Kohnle