Transformations of real-time finite-temperature Feynman rules
- 15 September 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 50 (6), 4097-4109
- https://doi.org/10.1103/physrevd.50.4097
Abstract
We consider transformations of the 2×2 propagator matrix in real-time finite-temperature field theory, resulting in transformed n-point functions. As special cases of such a transformation we examine the Keldysh basis, the retarded/advanced RA basis, and a Feynman-like FF¯ basis, which differ in this context as to how ‘‘economically’’ certain constraints on the original propagator matrix elements are implemented. We also obtain the relation between some of these real-time functions and certain analytic continuations of the imaginary-time functions. Finally, we compare some aspects of these bases which arise in practical calculations.Keywords
This publication has 25 references indexed in Scilit:
- Diagonalization of propagators in thermo field dynamics for relativistic quantum fieldsNuclear Physics B, 1994
- Analytic continuation of thermalN-point functions from imaginary to real energiesPhysical Review D, 1994
- Diagonalization of full finite temperature Green's functions by quasi-particlesPhysics Letters B, 1993
- A comparison of the real-time and the imaginary-time formalisms of finite-temperature field theory for 2, 3 and 4-point Green functionsNuclear Physics B, 1992
- N-point finite temperature expectation values at real timesNuclear Physics B, 1992
- Finite-temperature retarded and advanced Green functionsPhysics Letters B, 1992
- Spectral representation of three-point functions at finite temperaturePhysics Letters B, 1990
- Three-point functions at finite temperaturePhysics Letters B, 1990
- Real- and imaginary-time field theory at finite temperature and densityPhysics Reports, 1987
- Equilibrium and nonequilibrium formalisms made unifiedPhysics Reports, 1985