期刊
SCIENCE
卷 334, 期 6052, 页码 66-68出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1209019
关键词
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资金
- Defense Advanced Research Projects Agency
- Office of Naval Research [N000140911023]
- NSF [0855027]
- Division Of Physics
- Direct For Mathematical & Physical Scien [0855027] Funding Source: National Science Foundation
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.
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