Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 34, Issue 19, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6382/aa8535
Keywords
quantum gravity; dimensional reduction; dimensional estimators
Categories
Funding
- Department of Energy [DE-FG02-91ER40674]
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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.
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