Comments on noncommutative gravity
High Energy Physics - Theory
2010-11-11 v3 General Relativity and Quantum Cosmology
Abstract
We study the possibility of obtaining noncommutative gravity dynamics from string theory in the Seiberg-Witten limit. We find that the resulting low-energy theory contains more interaction terms than those proposed in noncommutative deformations of gravity. The role of twisted diffeomorphisms in string theory is studied and it is found that they are not standard physical symmetries. It is argued that this might be the reason why twisted diffeomorphisms are not preserved by string theory in the low energy limit. Twisted gauge transformations are also discussed.
Cite
@article{arxiv.hep-th/0605113,
title = {Comments on noncommutative gravity},
author = {Luis Alvarez-Gaume and Frank Meyer and Miguel A. Vazquez-Mozo},
journal= {arXiv preprint arXiv:hep-th/0605113},
year = {2010}
}
Comments
37 pages. Typos corrected. Final version to appear in Nuclear Physics B