  We apply the Bogoliubov-de Gennes equations to the confinement of a
monopole-antimonopole pair in a superconductor. This is related to the problem
of a quark-antiquark pair bound by a confining string, consisting of a
colour-electric flux tube, dual to the magnetic vortex of type-II
superconductors. We study the confinement of the field lines due to the
superconducting state and calculate the effective potential between the two
monopoles. At short distances the potential is Coulombic and at large distances
the potential is linear, as previously determined solving the Ginzburg-Landau
equations. The magnetic field lines and the string tension are also studied as
a function of the temperature $T$. Because we take into account the explicit
fermionic degrees of freedom, this work may open new perspectives to the
breaking of chiral symmetry or to colour superconductivity.
