Transformations of real time finite temperature Feynman rules

van Eijck, M.A.; Kobes, R.; van Weert, C.G.

doi:10.1103/PhysRevD.50.4097

Transformations of real time finite temperature Feynman rules

M.A. van Eijck
(
- Amsterdam U.
)
,
R. Kobes
(
- Annecy, LAPP and
- Winnipeg U.
)
,
C.G. van Weert
(
- Amsterdam U.
)

Jun, 1994

27 pages

Published in:

Phys.Rev.D 50 (1994) 4097-4109

e-Print:

hep-ph/9406214 [hep-ph]

DOI:

10.1103/PhysRevD.50.4097

Report number:

ITFA-94-15,
ENSLAPP-A-471-94,
NSF-ITP-94-61

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Abstract:

We consider transformations of the

2\times2

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

F\bar F

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.

finite temperature
n-point function: transformation
Feynman graph

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