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The Spin-Foam Approach to Quantum Gravity

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Author(s): Alejandro Perez

Journal: Living Reviews in Relativity
ISSN 1433-8351

Volume: 16;
Start page: 3;
Date: 2013;
Original page

Keywords: Quantum gravity

ABSTRACT
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.
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