Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-Dimensional Anderson Localization of Ultracold Matter   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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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph