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General Relativity and Quantum Cosmology

arXiv:2111.11448 (gr-qc)
[Submitted on 22 Nov 2021]

Title:Generalised scalar-tensor theories and self-tuning

Authors:Edmund J. Copeland, Sukhraj Ghataore, Florian Niedermann, Antonio Padilla
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Abstract:We explore a family of generalised scalar-tensor theories that exhibit self-tuning to low scale anti de Sitter vacua, even in the presence of a large cosmological constant. We are able to examine the linearised fluctuations about these vacua and compute the corresponding amplitude. Thanks to a subtle interplay between a weak scalar coupling and a low scalar mass, it is possible to exhibit self-tuning and compatibility with solar system tests of gravity without resorting to non-linearities and unreliable screening mechanisms. The weakness of the scalar coupling and the correspondingly slow response to vacuum energy phase transitions may present some interesting possibilities for connecting early universe inflation to the cancellation of vacuum energy.
Comments: 12 pages
Subjects: General Relativity and Quantum Cosmology (gr-qc); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Theory (hep-th)
Cite as: arXiv:2111.11448 [gr-qc]
  (or arXiv:2111.11448v1 [gr-qc] for this version)
  https://doi.org/10.48550/arXiv.2111.11448
Related DOI: https://doi.org/10.1088/1475-7516/2022/03/004

Submission history

From: Florian Niedermann [view email]
[v1] Mon, 22 Nov 2021 19:00:02 UTC (15 KB)
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