The Coincidence Limit of the Graviton Propagator in de Donder Gauge on de Sitter Background
E. O. Kahya (U. of Jena), S. P. Miao (U. of Utrecht), R. P. Woodard, (U. of Florida)
TL;DR
This paper calculates the behavior of the graviton propagator in de Sitter space within de Donder gauge, focusing on the coincidence limit and providing tools for regularization.
Contribution
It explicitly derives de Sitter breaking contributions and provides power series expansions for the structure functions of the graviton propagator.
Findings
Explicit de Sitter breaking contributions identified
Power series expansions for structure functions provided
Coincidence limit of the propagator evaluated
Abstract
We explicitly work out the de Sitter breaking contributions to the recent solution for the de Donder gauge graviton propagator on de Sitter. We also provide explicit power series expansions for the two structure functions, which are suitable for implementing dimensional regularization. And we evaluate the coincidence limit of the propagator.
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