Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous scaling of conductivity in integrable fermion systems   We analyze the high-temperature conductivity in one-dimensional integrable
models of interacting fermions: the t-V model (anisotropic Heisenberg spin
chain) and the Hubbard model, at half-filling in the regime corresponding to
insulating ground state. A microcanonical Lanczos method study for finite size
systems reveals anomalously large finite-size effects at low frequencies while
a frequency-moment analysis indicates a finite d.c. conductivity. This
phenomenon also appears in a prototype integrable quantum system of
impenetrable particles, representing a strong-coupling limit of both models. In
the thermodynamic limit, the two results could converge to a finite d.c.
conductivity rather than an ideal conductor or insulator scenario.

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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: math
17
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: eess
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: hep-ex