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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.20725 |
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Table of Contents:
- We present remarkably simple covariant expressions for the graviton and ghost propagators in Anti-de Sitter and de-Sitter spacetimes valid in any spacetime dimension. In gravity there is a $2$-parameter family of covariant gauge-fixing conditions and the simplification occurs for a special choice of these parameters. In this gauge the graviton propagator satisfies $\nabla^μμ\nabla^νμ\, G_{μν,α'β'}(μ)=0$, where $μ$ is the geodesic distance between two points, and this condition implies an improved IR behavior. This gauge choice is not possible in flat spacetime.