Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Renormalization Group Approach to Spectral Properties of the Two-Channel
  Anderson Impurity Model   The impurity Green function and dynamical susceptibilties for the two-channel
Anderson impurity model are calculated. An exact expression for the self-energy
of the impurity Green function is derived. The imaginary part of the
self-energy scales as $\sqrt{|\w/T_K|}$ for $T\to 0$ serving as a hallmark for
non-Fermi behavior. The many-body resonance is pinned to a universal value
$1/(2\pi\Delta)$ at $\w=0$. Its shape becomes increasingly more symmetric for
the Kondo-regimes of the model. The dynamical susceptibilities are governed by
two energy scales $T_K$ and $T_h$ and approach a constant value for $\w\to 0$,
whereas relation $\chi''(\w)\propto \w$ holds for the single channel model.

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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci