Abstract
Since independent-site (link) or independent-link (plaquette) variational states enhance the order or the disorder, respectively, in the treatment of spin (gauge) models, we prove that mixed states are able to improve the critical coupling while giving the qualitatively correct behavior of the relevant parameters.
- Received 9 April 1985
DOI:https://doi.org/10.1103/PhysRevD.32.1491
©1985 American Physical Society
