Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-04-19
Nucl.Phys. B654 (2003) 357-403
Physics
High Energy Physics
High Energy Physics - Theory
41 pages, 6 figures
Scientific paper
10.1016/S0550-3213(02)01145-8
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.
Evans T. S.
Nicola Angel Gomez
Rivers Ray J.
Steer Daniele A.
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