... controlled derivation in linear response theory of a Kubo formula for the ac-conductivity along the lines of the derivation for the dc-conductivity given in [BoGKS] This Kubo formula (see Corollary ... Mathematics, 166 (2007), 549–577 On Mott’s formula for the ac-conductivity in the Anderson model ¨ By Abel Klein, Olivier Lenoble, and Peter Muller* Abstract We study the ac-conductivity in linear ... always denote some finite constant depending only on a, b, The Anderson model and the main result The Anderson tight binding model is described by the random Schr¨dinger o operator H, a measurable...