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PreprintCC BY 4.0arXiv

Conformal Renormalisation of 8D Einstein Gravity

  • Giorgos Anastasiou
  • Ignacio J. Araya
  • Nicolas Boulanger
  • Rodrigo Olea
  • Davide Rovere
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Abstract

We show that Holographic Renormalisation (HR) in eight dimensions is encoded in the unique conformal gravity theory that admits an Einstein sector with constant negative curvature. We explicitly relate HR to Topological Regularisation (TR), where the latter prescribes to add the Euler term to the Einstein-Hilbert Lagrangian density, with a precise coefficient so as to ensure that the resulting density is polynomial in the anti de Sitter (AdS) curvature. The polynomial is still asymptotically divergent. We find that the aforementioned, unique conformal gravity action in 8D, reproduces the polynomial, together with extra boundary terms that cancel the divergent terms in the action. We conjecture that, in arbitrary even dimension, HR is equivalent to conformally completing the Einstein-Hilbert action with negative cosmological constant, plus the Euler term with fixed coupling prescribed by TR.

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Cite

BibTeXRIS
BibTeX
@misc{anastasiou2026conformal,
  title = {{Conformal Renormalisation of 8D Einstein Gravity}},
  author = {Giorgos Anastasiou and Ignacio J. Araya and Nicolas Boulanger and Rodrigo Olea and Davide Rovere},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2607.03679},
  eprint = {2607.03679},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.03679},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Conformal Renormalisation of 8D Einstein Gravity
AU  - Giorgos Anastasiou
AU  - Ignacio J. Araya
AU  - Nicolas Boulanger
AU  - Rodrigo Olea
AU  - Davide Rovere
PY  - 2026
DA  - 2026/10/12
PB  - arXiv
DO  - 10.48550/arxiv.2607.03679
UR  - https://arxiv.org/abs/2607.03679
AB  - We show that Holographic Renormalisation (HR) in eight dimensions is encoded in the unique conformal gravity theory that admits an Einstein sector with constant negative curvature. We explicitly relate HR to Topological Regularisation (TR), where the latter prescribes to add the Euler term to the Einstein-Hilbert Lagrangian density, with a precise coefficient so as to ensure that the resulting density is polynomial in the anti de Sitter (AdS) curvature. The polynomial is still asymptotically divergent. We find that the aforementioned, unique conformal gravity action in 8D, reproduces the polynomial, together with extra boundary terms that cancel the divergent terms in the action. We conjecture that, in arbitrary even dimension, HR is equivalent to conformally completing the Einstein-Hilbert action with negative cosmological constant, plus the Euler term with fixed coupling prescribed by TR.
ER  -