  In this paper we study the interactions among a static quark-antiquark pair
in the presence of dense two-color quark matter with lattice simulation. To
this end we compute Polyakov line correlation functions and determine the
renormalized color averaged, color singlet and color triplet grand potentials.
The color singlet grand potential allows us to elucidate the number of quarks
induced by a static quark antiquark source, as well as the internal energy of
such a pair in dense quark matter. We furthermore determine the screening
length, which in the confinement phase is synonymous with the string breaking
distance. The screening length is a decreasing function of baryon density, due
to the possibility to break the interquark string via a scalar diquark
condensate at high density. We also study the large distance properties of the
color singlet grand potential in a dense medium and find that it is well
described by a simple Debye screening formula, parameterized by a Debye mass
and an effective coupling constant. The latter is of order of unity, i.e. even
at large density two-color quark matter is a strongly correlated system.
