Lectures on Loop Quantum Gravity
Abstract
Quantum General Relativity (QGR), sometimes called Loop Quantum Gravity, has matured over the past fifteen years to a mathematically rigorous candidate quantum field theory of the gravitational field. The features that distinguish it from other quantum gravity theories are 1) background independence and 2) minimality of structures. Background independence means that this is a nonperturbative approach in which one does not perturb around a given, distinguished, classical background metric, rather arbitrary fluctuations are allowed, thus precisely encoding the quantum version of Einstein''s radical perception that gravity is geometry.
 Publication:

Quantum Gravity: From Theory to Experimental Search
 Pub Date:
 2003
 DOI:
 10.1007/9783540452300_3
 arXiv:
 arXiv:grqc/0210094
 Bibcode:
 2003LNP...631...41T
 Keywords:

 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory;
 Mathematical Physics
 EPrint:
 90 pages, Latex, 18 figures, uses graphicx and pstricks for coloured text and graphics, based on lectures given at the 271st WE Heraeus Seminar ``Aspects of Quantum Gravity: From Theory to Experimental Search'', Bad Honnef, Germany, February 25th  March 1st, to appear in Lecture Notes in Physics