From Wikipedia, the free encyclopedia
|This article does not cite any sources. (December 2009) (Learn how and when to remove this template message)|
In some physics theories, choosing a 3-geometry via spin network and 4-geometry via spin foam, any superposition of spin networks is called a kinematical state and any superposition of spin foams is called a quantum history.
|This quantum mechanics-related article is a stub. You can help Wikipedia by expanding it.|