eng
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Living Reviews in Relativity
1433-8351
2005-01-24
8
1
10.12942/lrr-2005-1
lrr-2005-1
article
Quantum Gravity in 2+1 Dimensions: The Case of a Closed Universe
Steven Carlip
1
Department of Physics, University of California, Davis, CA 95616, U.S.A.
In three spacetime dimensions, general relativity drastically simplifies, becoming a ``topological'' theory with no propagating local degrees of freedom. Nevertheless, many of the difficult conceptual problems of quantizing gravity are still present. In this review, I summarize the rather large body of work that has gone towards quantizing (2+1)-dimensional vacuum gravity in the setting of a spatially closed universe.
http://www.livingreviews.org/lrr-2005-1
2+1 gravity
quantum gravity
quantum cosmology