Quantum diffusion of matter waves in 2D speckle potentials C. Miniatura, R. C. Kuhn, D. Delande and C. A. Müller Eur. Phys. J. B, 68 3 (2009) 353-364 Published online: 24 December 2008 DOI: 10.1140/epjb/e2008-00463-7