# A note on the novel 4D Einstein-Gauss-Bonnet gravity

@article{Ai2020ANO,
title={A note on the novel 4D Einstein-Gauss-Bonnet gravity},
author={Wen-Yuan Ai},
journal={arXiv: General Relativity and Quantum Cosmology},
year={2020}
}
• Wen-Yuan Ai
• Published 2020
• Physics
• arXiv: General Relativity and Quantum Cosmology
Recently, a novel 4D Einstein-Gauss-Bonnet gravity has been proposed by Glavan and Lin [Phys. Rev. Lett. 124, 081301 (2020)] by rescaling the coupling $\alpha \rightarrow \alpha/(D-4)$ and taking the limit $D\rightarrow 4$ at the level of equations of motion. This prescription, though was shown to bring non-trivial effects for some spacetimes with particular symmetries, remains mysterious and calls for scrutiny. Indeed, there is no continuous way to take the limit $D\rightarrow 4$ in the higher… Expand