Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of strongly phase fluctuating d-wave superconductors and the spin
  response in underdoped cuprates   General theory of d-wave quasiparticles coupled to phase fluctuations of
superconducting order parameter is discussed. In the charge sector the
superfluid density is found to conform to Uemura scaling, and the charge
renormalization factor to decrease with underdoping. The spin susceptibilty
exhibits four distinct regimes with increasing frequency and scales with the
superconducting Tc, as observed.

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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
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The categories of this paper are: eess