  In order to study the detailed dynamics and associated non-perturbative
features of QCD, a dual version of the color gauge theory based on the
topologically viable homogeneous fiber bundle approach has been analysed taking
into account its magnetic symmetry structure. In the dynamically broken phase
of magnetic symmetry, the associated flux tube structure on a S 2 -sphere in
the magnetically condensed state of the dual QCD vacuum has been analyzed for
the profiles of the color electric field using flux quantization and stability
conditions. The color electric field has its intimate association with the
vector mode of the magnetically condensed QCD vacuum and such field
configurations have been analyzed to show that the color electric flux gets
localized towards the poles for a large sphere case while it gets uniformly
distributed for the small sphere case in the infrared sector of QCD. The
critical flux tube densities have been computed for various couplings and are
shown to be in agreement with that for lead-ion central collisions in the near
infrared sector of QCD. The possible annihilation/unification of flux tubes
under some typical flux tube density and temperature conditions in the magnetic
symmetry broken phase of QCD has also been analyzed and shown to play an
important role in the process of QGP formation. The thermal variation of the
profiles of the color electic field is further investigated which indicates the
survival of flux tubes even in the thermal domain that leads the possibility of
the formation of some exotic states like QGP in the intermedate regime during
the quark-hadron phase transition.
