Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-08-21
Physics
High Energy Physics
High Energy Physics - Theory
standard LaTeX, 34 pages
Scientific paper
We demonstrate how to obtain explicitly the propagators for quantum fields residing in curved space-time using the heat kernel for which a new construction procedure exists. Propagators are determined for the case of Rindler, Friedman-Robertson-Walker, Schwarzschild and general conformally flat metrics, both for scalar, Dirac and Yang-Mills fields. The calculations are based on an improved formula for the heat kernel in a general curved space. All the calculations are done in $d=4$ dimensions for concreteness, but are easily generalizable to arbitrary $d$. The new method advocated here does not assume that the fields are massive, nor is it based on an aymptotic expansion as such. Whenever possible, the results are compared to that of other authors.
Antonsen Frank
Bormann Karsten
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