Thermo Field Dynamics for Quantum Fields with Continuous Mass Spectrum applied to Nuclear Physics

Abstract

Transport coefficients are obtained by incorporating a gauge principle into thermo field dynamics of inhomogeneous systems. In contrast to previous derivations, neither imaginary time arguments nor perturbation theory in powers of a coupling constant are used in the calculation. Numerical values are calculated for the pion component in hot nuclear matter.

Comments: 10 pages in LaTeX with two figures included as postscript code