Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonperturbative renormalization-group approach for quantum dissipative
  systems   We analyze the dissipative quantum tunneling in the Caldeira-Leggett model by
the nonperturbative renormalization-group method. We classify the dissipation
effects by introducing the notion of effective cutoffs. We calculate the
localization susceptibility to evaluate the critical dissipation for the
quantum-classical transition. Our results are consistent with previous
semiclassical arguments, but give considerably larger critical dissipation.

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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn