  The moduli space of covariantly constant gauge fields is infinite-dimensional
and describes non-perturbative solutions of the Yang-Mills equation of
superposed chromomagnetic flux tubes (vortices) of opposite magnetic charges.
These gauge field configurations are stretched along the potential valleys of a
constant energy density and are separated by potential barriers between
classically degenerate vacua that are forming a complicated potential landscape
of the QCD vacuum. It is suggested that the solutions describe the condensate
of dense chromomagnetic vortices representing a dual analog of the Cooper pairs
condensate in a superconductor. The solutions represent exact non-perturbative
solutions of the YM equation in the background chromomagnetic field.
