Abstract
The Bethe-Peierls approximation is applied to the classical Ising model in dimensions and in a variational treatment of the Hamiltonian gauge model in 2+1 dimensions. These analytical and simple calculations are in good agreement with exact results.
- Received 2 June 1983
DOI:https://doi.org/10.1103/PhysRevD.29.300
©1984 American Physical Society