Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fusion rules and vortices in $p_x+ip_y$ superconductors   The "half-quantum" vortices ($\sigma$) and quasiparticles ($\psi$) in a
two-dimensional $p_x+ip_y$ superconductor obey the Ising-like fusion rules
$\psi\times \psi=1$, $\sigma\times \psi=\sigma$, and $\sigma\times \sigma=
1+\psi$. We explain how the physical fusion of vortex-antivortex pairs allows
us to use these rules to read out the information encoded in the topologically
protected space of degenerate ground states. We comment on the potential
applicability of this fact to quantum computation.
  Modified 11/30/05 to reflect manuscript as accepted for publication. Includes
corrected last section.

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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
3
The categories of this paper are: physics
36
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: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg