Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy transport in Heisenberg chains beyond the Luttinger liquid
  paradigm   We study the energy transport between two interacting spin chains which are
initially separated, held at different temperatures and subsequently put in
contact. We consider the spin-1/2 XXZ model in the gapless regime and exploit
its integrability properties to formulate an analytical Ansatz for the
non-equilibrium steady state even at temperatures where the low-energy
Luttinger liquid description is not accurate. We apply our method to compute
the steady energy current and benchmark it both with the known low-energy limit
and at higher temperatures with numerical simulations. We find an excellent
agreement even at high temperatures, where the Luttinger liquid prediction is
shown to fail.

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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: econ
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg