Can gravitational dynamics be obtained by diffeomorphism invariance of action?
General Relativity and Quantum Cosmology
2008-11-26 v2
Abstract
It has recently been suggested that the gravitational dynamics could be obtained by requiring the action to be invariant under diffeomorphism transformations. We argue that the action constructed in usual way is automatically diffeomorphism invariant in nature, which thus invalidates this alternative perspective to obtain gravitational dynamics. Especially, we also show what is wrong with the technical derivation of gravitational dynamics in the alternative approach.
Cite
@article{arxiv.gr-qc/0703064,
title = {Can gravitational dynamics be obtained by diffeomorphism invariance of action?},
author = {Sijie Gao and Hongbao Zhang},
journal= {arXiv preprint arXiv:gr-qc/0703064},
year = {2008}
}
Comments
version published in PRD