Investigating Confinement in Dually Transformed U(1) Lattice Gauge Theory
arXiv:hep-lat/9705019 · doi:10.1103/PhysRevD.57.123
Abstract
The dually transformed path integral of four-dimensional U(1) lattice gauge theory is used for the calculation of expectation values in the presence of external charges. Applying the dual simulation to flux tubes for charge distances up to around 20 lattice spacings, we find a deviation from the behaviour of a dual type-II superconductor in the London limit at large distances. The roughening of the flux tube agrees with the effective string picture of confinement. Further we show that finite temperature effects are negligible for time extents larger than the charge distance. Finally we analyze the different contributions to the total energy of the electromagnetic field. The parallel component of the magnetic field turns out to have the strongest influence on the deviation from the linear behaviour at small charge distances.
17 pages, latex, epsf-figures included, submitted to Phys.Rev.D; complete postscript file also available at ftp://is1.kph.tuwien.ac.at/pub/zach/pr97.ps.gz
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