  The color-electric flux tube of Abelian-projected (AP) SU(2) lattice gauge
theory in the maximally Abelian gauge (MAG) is revisited. It is shown that the
lattice Gribov copy effect in the MAG is crucial for the monopole-related parts
of the flux-tube profiles. Taking into account both the gauge fixing procedure
and the effect of finite quark-antiquark distance properly, the scaling
property of the flux-tube profile is confirmed. The quantitative relation
between the measured AP flux tube and the flux-tube solution of the U(1) dual
Abelian Higgs (DAH) model is also discussed. The fitting of the AP flux tube in
terms of the DAH flux tube indicates that the vacuum can be classified as
weakly type-I dual superconductor.
