Challenges for Emergent Gravity
arXiv:1207.2504
Abstract
The idea of gravity as an "emergent" phenomenon has gained popularity in recent years. I discuss some of the obstacles that any such model must overcome in order to agree with the observational underpinnings of general relativity.
18 pages; v2: added discussion of TDiff invariance, emergence of diffeomorphism invariance, and more references
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