Transport coefficients and analytic continuation in dual /(1+1)-dimensional models at finite temperature

摘要: The conductivity of a finite temperature (1 + 1)-dimensional fermion gas described by the massive Thirring model is shown to be related retarded propagator dual boson sine-Gordon model. Duality provides natural resummation which resolves infra-red problems, and can at non-zero chemical potential or density. In addition, high temperatures, we apply dimensional reduction technique find resummed closed expressions for self-energy relate them conductivity. Particular attention paid discussion analytic continuation link with integrable field theories. implicit in duality powerful alternative standard diagrammatic evaluation transport coefficients temperature.