Computing spectral densities in finite temperature field theory
- 15 May 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 47 (10) , 4586-4607
- https://doi.org/10.1103/physrevd.47.4586
Abstract
Convenient Cutkosky-like diagrammatic rules for computing the spectral densities of arbitrary two-point correlation functions in finite temperature field theory are derived. The approach is based on an explicit analytic continuation of imaginary-time Feynman diagrams. The application of this method to the perturbative evaluation of transport coefficients is briefly discussed.Keywords
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