Challenges for emergent gravity

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. ► A tenable model of emergent gravity must duplicate the successes of...

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Bibliographic Details
Published inStudies in History and Philosophy of Modern Physics Vol. 46; pp. 200 - 208
Main Author Carlip, Steven
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2014
Subjects
Emergent spacetime
Quantum gravity
Emergent spacetime
Quantum gravity
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ISSN1355-2198
1879-2502
DOI10.1016/j.shpsb.2012.11.002

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Summary: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. ► A tenable model of emergent gravity must duplicate the successes of general relativity. ► This requires the emergence of a number of “universal” properties. ► These include Lorentz invariance, diffeomorphism invariance, and the principle of equivalence. ► I describe the systematic difficulties in achieving such a goal.
ISSN:1355-2198
1879-2502
DOI:10.1016/j.shpsb.2012.11.002