Stability of the Bulk Phase Diagram of the SU(2) Lattice Gauge Theory with Fundamental - Adjoint Action

Using improved mean field and strong coupling expansions we re-analyse the bulk phase diagram of the fundamental-adjoint action of the SU(2) Lattice Gauge Theory. We find that the qualitative features of the bulk phase diagram are robust and unchanged by the inclusion of higher order terms. On the other hand, some of the quantitative features, such as the location of the endpoint of the line of bulk phase transitions, seem to be strongly dependent on the higher order terms of the strong coupling expansion. E-mail:[email protected] E-mail:[email protected] Lattice regularization of a continuum action is not unique. For non-abelian gauge theories the Wilson action [1] is the most popular one, but other actions have been studied in the literature. In particular, lately there has been a resurgence of interest in the Bhanot-Creutz action[2] S = ∑