Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scaling of quantum discord in spin models   We study the scaling of quantum discord (a measure of quantum correlation
beyond entanglement) in spin models analytically and systematically. We find
that at finite temperature the block scaling of quantum discord satisfies an
area law for any two-local Hamiltonian. We show that generically and
heuristically the two-site scaling of quantum discord is similar to that of
correlation functions. In particular, at zero temperature it decays
exponentially and polynomially in gapped and gapless (critical) systems,
respectively; at finite temperature it decays exponentially in both gapped and
gapless systems. We compute the two-site scaling of quantum discord in the XXZ
chain, the XY chain (in a magnetic field), and the transverse field Ising chain
at zero temperature.

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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys