Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport Coefficients and Analytic Continuation in Dual 1+1 Dimensional
  Models at Finite Temperature   The conductivity of a finite temperature 1+1 dimensional fermion gas
described by the massive Thirring model is shown to be related to the retarded
propagator of the dual boson sine-Gordon model. Duality provides a natural
resummation which resolves infra-red problems, and the boson propagator can be
related to the fermion gas at non-zero temperature and chemical potential or
density. In addition, at high temperatures, we can apply a dimensional
reduction technique to find resummed closed expressions for the boson
self-energy and relate them to the fermion conductivity. Particular attention
is paid to the discussion of analytic continuation. The resummation implicit in
duality provides a powerful alternative to the standard diagrammatic evaluation
of transport coefficients at finite temperature.

29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: eess
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
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The categories of this paper are: stat
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex