This article reviews the present status of the spin-foam approach to the quantization of gravity. Special attention is payed to the pedagogical presentation of the recently-introduced new models for four-dimensional quantum gravity. The models are motivated by a suitable implementation of the path integral quantization of the Plebanski formulation of gravity on a simplicial regularization. The article also includes a self contained treatment of 2+1 gravity. The simple nature of the latter provides the basis and a perspective for the analysis of both conceptual and technical issues that remain open in four dimensions.
Keywords: Quantum gravity
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Since a Living Reviews in Relativity article may evolve over time, please cite the access <date>, which uniquely identifies the version of the article you are referring to:
Alejandro Perez,
"The Spin-Foam Approach to Quantum Gravity",
Living Rev. Relativity 16, (2013), 3. URL (cited on <date>):
http://www.livingreviews.org/lrr-2013-3
ORIGINAL | http://www.livingreviews.org/lrr-2013-3 |
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Title | The Spin-Foam Approach to Quantum Gravity |
Author | Alejandro Perez |
Date | accepted 11 June 2012, published 14 February 2013 |