title: Three-dimensional Anderson localization of ultracold matter.
abstract: Anderson localization (AL) is a ubiquitous interference phenomenon in which waves fail to propagate in a disordered medium. We observe three-dimensional AL of noninteracting ultracold matter by allowing a spin-polarized atomic Fermi gas to expand into a disordered potential. A two-component density distribution emerges consisting of an expanding mobile component and a nondiffusing localized component. We extract a mobility edge that increases with the disorder strength, whereas the thermally averaged localization length is shown to decrease with disorder strength and increase with particle energy. These measurements provide a benchmark for more sophisticated theories of AL.
authors: Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
authors: S S
authors: SS
authors: Kondov
authors: W R
authors: WR
authors: McGehee
authors: J J
authors: JJ
authors: Zirbel
authors: B
authors: B
authors: DeMarco