Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1996-01-09
Phys.Lett. B380 (1996) 346-352
Physics
High Energy Physics
High Energy Physics - Lattice
11 pages, Latex, 5 PostScript figures, uuencoded
Scientific paper
10.1016/0370-2693(96)00498-4
We show that, independently of the boundary conditions, the two phases of the 4-dimensional compact U(1) lattice gauge theory can be characterized by the presence or absence of an ``infinite'' current network, with an appropriate definition of ``infinite'' for the various types of boundary conditions imposed on the finite lattice. The probability for the occurrence of an ``infinite'' network takes values 0 or 1 in the cold and hot phase, respectively. It thus constitutes a very efficient order parameter, which allows one to determine the transition region at low computational cost. In addition, for open and fixed boundary conditions we address the question of the impact of inhomogeneities and give examples of the reappearance of an energy gap already at moderate lattice sizes.
Kerler Werner
Rebbi Claudio
Weber Axel
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