Comments on noncommutative gravity

Details Comments on noncommutative gravity Comments on noncommutative gravity

2006-05-11

arxiv.org/abs/hep-th/0605113v3

Nucl.Phys.B753:92-127,2006

Physics

High Energy Physics

High Energy Physics - Theory

37 pages. Typos corrected. Final version to appear in Nuclear Physics B

Scientific paper

10.1016/j.nuclphysb.2006.07.009

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.

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