  The structure of the Abelian-projected (AP) flux tube in SU(2) gauge theory
in the maximally Abelian gauge is studied by applying the Hodge decomposition
to the Abelian Wilson loop. It is shown that the profile of the AP flux tube
has the same structure as the classical flux tube solution in the dual Abelian
Higgs model, which is composed of a Coulombic and a solenoidal electric field
linked by monopole supercurrent.
