Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Absence of a Slater Transition in the Two-Dimensional
  Hubbard Model"   In a recent paper, Phys. Rev. Lett. 87, 167010/1-4 (2001), Moukouri and
Jarrell presented evidence that in the two-dimensional (d=2) Hubbard model at
half-filling there is a metal-insulator transition (MIT) at finite temperature
even in weak coupling. While we agree with the numerical results of that paper,
we arrive at different conclusions: The apparent gap at finite-temperature can
be understood, at weak-coupling, as a crossover phenomenon involving large (but
not infinite) antiferromagnetic (AFM) correlation length. Phase-space effects
on the self-energy in d=2 are crucial, as are the ratio between AFM correlation
length and single-particle thermal de Broglie wavelength. In weak coupling,
d=2, there is in general no finite-temperature MIT transition in the
thermodynamic sense.

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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
0
The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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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: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc