Dimension and Dimensional Reduction in Quantum Gravity
General Relativity and Quantum Cosmology
2017-09-27 v2 High Energy Physics - Theory
Abstract
A number of very different approaches to quantum gravity contain a common thread, a hint that spacetime at very short distances becomes effectively two dimensional. I review this evidence, starting with a discussion of the physical meaning of "dimension" and concluding with some speculative ideas of what dimensional reduction might mean for physics.
Keywords
Cite
@article{arxiv.1705.05417,
title = {Dimension and Dimensional Reduction in Quantum Gravity},
author = {S. Carlip},
journal= {arXiv preprint arXiv:1705.05417},
year = {2017}
}
Comments
33 page draft of solicited review article -- comments and added references welcome; v2: many added references, minor clean-up