Abstract
After having roughly scanned the phase structure of the 3D Georgi-Glashow model on an 8 3 lattice, we investigate whether the vacuum supports an underlying (semiclassical) (anti)monopole structure. Starting from Monte Carlo generated equillibrium configurations, a Langevin-type relaxation procedure is applied in order to freeze out the quantum fluctuations. As expected, from continuum considerations, we find quasi stable plateaus in the action corresponding to pairs of monopoles-antimonopoles (m m ). These excitations are localized in space (although in general not spherical symmetric) and carry a magnetic charge of ±1. Our data show that the density of these pairs drops very sharply at the Higgs phase transition. In addition we observe stable abelian Dirac strings, which arise from (m m ) pairs annihilating through the boundaries.
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