English

Tantum Gravity

High Energy Physics - Theory 2025-09-04 v1 General Relativity and Quantum Cosmology Quantum Physics

Abstract

We argue there is an interesting triple-scaling limit of quantum gravity, namely when Planck's constant scales to infinity while Newton's constant and the speed of light tend to zero, keeping fixed the gravitational coupling GNc4G_N\,c^{-4} and the combination c\hbar\,c. We refer to this limiting theory as ``tantum gravity'' and describe in this Letter some of its main properties and prospects for physics. Most notably, the laws of black hole thermodynamics survive this limit, which means that puzzles related to black holes and their evaporation could be addressed more easily in tantum gravity than in fully-fledged quantum gravity.

Keywords

Cite

@article{arxiv.2501.00095,
  title  = {Tantum Gravity},
  author = {Florian Ecker and Adrien Fiorucci and Daniel Grumiller},
  journal= {arXiv preprint arXiv:2501.00095},
  year   = {2025}
}

Comments

5 pp, 1 figure

R2 v1 2026-06-28T20:52:47.633Z