Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disorder-Induced Topological Defects in a d=2 Elastic Medium at Zero
  Temperature   The density and correlations of topological defects are investigated
numerically in a model of a d=2 elastic medium subject to a periodic quenched
random potential. The computed density of defects decreases approximately
exponentially with the defect core energy. Comparing the defect-free ground
state with the ground state with defects, it is found that the difference is
described by string-like excitations, bounded by defect pairs, which have a
fractal dimension of 1.250(3). At zero temperature, the disorder-induced
defects screen the interaction of introduced vortex pairs.

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The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
1
The categories of this paper are: cs
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an