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Manuscript Title: Wilson loops, string tension and correlations in Monte Carlo simulation of compact U(1) lattice gauge theory.
Authors: M.J. Cole, K.J.M. Moriarty, P.E. Stolorz
Program title: LATT
Catalogue identifier: ACFJ_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 30(1983)421
Programming language: Fortran.
Computer: DEC VAX 11/780.
Operating system: DEC VAX 11/780: VMS 3.2.
RAM: 16K words
Word size: 32
Keywords: Elementary, Particle physics, Qcd, Lattice gauge theory, U(1), Quark confinement, Phase diagram, Phase transition, Statistical mechanics, Average action Per plaquette, Monte carlo simulation, Wilson loop, String tension, Correlations.
Classification: 11.5.

Nature of problem:
The program calculates Wilson loops, their correlations and the string tension for U(1) lattice gauge theory. These are useful observables for studying the phase structure of U(1) lattice gauge theory.

Solution method:
Monte Carlo techniques are used to generate a series of field configurations of the lattice system at a given temperature. For each configuration the Wilson loops are calculated, the string tension extracted and, if desired, correlations between the loops are evaluated. The program uses the technique of sweeping through the lattice.

Restrictions:
The storage required is dependent on the lattice size. The execution time increases with the lattice size and with the number of Monte Carlo iterations required, and is typically rather long. At temperatures much below the critical point, the Monte Carlo vetoing process becomes very slow.

Running time:
The test run took 13.5 s on the DEC VAX 11/780.