  We consider the quantum chromodynamics (QCD) Kondo effect for a single heavy
quark in quark matter composed of light quarks with chiral symmetry breaking.
Introducing several spinor structures in QCD Kondo condensates, i.e.,
particle-projected condensate, antiparticle-projected condensate, and normal
condensate without projection, we calculate the attractive energy gained by the
heavy quark within the mean-field approximation in the path-integral formalism.
We show that the normal condensate is favored at low density and the
particle-projected condensate is favored at high density, when the light quark
has a nonzero mass. We interpret such a density-dependent transition between
the two condensates in terms of the Kondo resonances.
