ON THE ANALYTICAL STUDY IN LATTICE GAUGE FIELD THEORY
- Received Date: 1900-01-01
- Accepted Date: 1900-01-01
- Available Online: 1986-02-05
Abstract: The relation between the saddle point approximation and the action variational method in the lattice gauge field theory is discussed. It is expounded that in the thermodynamical limit by using a trial action composed of mean fields, the variational approach leads to the results as well as the higher order corrections obtained in the saddle point approximation. It is also pointed out that order by order corrections to the variational approach can be worked out systematically in an improved variational approach.