A Ginzburg-Landau analysis of the colour electric flux tube

In a simulation of SU(2) gauge theory we investigate, after maximal Abelian projection, the dual Maxwell equations for colour field and monopole current distributions around a static quark-antiquark pair Q overlineQ in vacuo. Within the dual superconductor picture we carry out a Ginzburg-Landau type analysis of the flux tube profile. As a result we can determine the coherence length of the GL wave function related to the monopole condensate, ξ = .27(3) fm, to be compared to the penetration length, λ = .16(2) fm (scaled with the string tension).