Discrete Approaches to Quantum Gravity in Four DimensionsAuthor(s): Loll Renate
Journal: Living Reviews in Relativity ISSN 1433-8351
Volume: 1; Start page: 13; Date: 1998;
Keywords: Quantum General Relativity
The construction of a consistent theory of quantum gravity is a problem in theoretical physics that has so far defied all attempts at resolution. One ansatz to try to obtain a non-trivial quantum theory proceeds via a discretization of space-time and the Einstein action. I review here three major areas of research: gauge-theoretic approaches, both in a path-integral and a Hamiltonian formulation; quantum Regge calculus; and the method of dynamical triangulations, confining attention to work that is strictly four-dimensional, strictly discrete, and strictly quantum in nature.