Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interaction-induced delocalization of quasiparticle pairs in the
  Anderson insulator   It has recently been established that a short-range interaction can strongly
delocalize a pair of particles moving in a disordered potential. We investigate
whether an analogous effect exists also for pairs of quasiparticles in the
Anderson insulator by employing an approximate numerical evaluation of the
two-particle Green function of the many-body system. At the Fermi energy, the
quasiparticle pair is localized on the scale of the single-particle
localization length. The delocalization effect is recovered when the excitation
energy of the pair is comparable to the bandwidth.

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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
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The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: physics
31
The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat