Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological order in paired states of fermions in two-dimensions with
  breaking of parity and time-reversal symmetries   We numerically evaluate the entanglement spectrum (singular value
decomposition of the wavefunction) of paired states of fermions in two
dimensions that break parity and time-reversal symmetries, focusing on the
spin-polarized $p_x+ip_y$ case. The entanglement spectrum of the weak-pairing
(BCS) phase contains a Majorana zero mode, indicating non-Abelian topological
order. In contrast, for the strong-pairing (BEC) phase, we find no such mode,
consistent with Abelian topological order.

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The categories of this paper are: hep-th
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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: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio