A remarkably simple covariant graviton propagator in (Anti-)de Sitter spacetime
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866911335866957824 |
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| author | Moga, Radu N. Skenderis, Kostas |
| author_facet | Moga, Radu N. Skenderis, Kostas |
| 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_20725 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A remarkably simple covariant graviton propagator in (Anti-)de Sitter spacetime Moga, Radu N. Skenderis, Kostas High Energy Physics - Theory General Relativity and Quantum Cosmology 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. |
| title | A remarkably simple covariant graviton propagator in (Anti-)de Sitter spacetime |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2512.20725 |