Critical Overview of Loops and Foams

Abstract : This is a review of the present status of loop and spin foam approaches to quantization of four-dimensional general relativity. It aims at raising various issues which seem to challenge some of the methods and the results often taken as granted in these domains. A particular emphasis is given to the issue of diffeomorphism and local Lorentz symmetries at the quantum level and to the discussion of new spin foam models. We also describe modifications of these two approaches which may overcome their problems and speculate on other promising research directions.
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Journal articles
Physics Reports, Elsevier, 2011, 506 (3-4), pp.41-86. <10.1016/j.physrep.2011.05.002>


https://hal.archives-ouvertes.fr/hal-00520869
Contributor : Logiciel Aigle <>
Submitted on : Friday, September 24, 2010 - 2:16:15 PM
Last modification on : Monday, June 25, 2012 - 11:00:40 AM

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Sergey Alexandrov, Philippe ROCHE. Critical Overview of Loops and Foams. Physics Reports, Elsevier, 2011, 506 (3-4), pp.41-86. <10.1016/j.physrep.2011.05.002>. <hal-00520869>

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