  The behaviour of centre vortices in the presence of dynamical fermions is
studied for the first time in the context of the static quark potential and the
Landau-gauge gluon propagator. These results indicate that in the presence of
dynamical fermions, centre vortices are able to better encapsulate the
long-range behaviour of QCD, compared to previous studies on pure Yang-Mills
lattices. This work provides strong evidence that centre vortices are
responsible for the long-range linear potential and the enhanced infrared gluon
propagator, which are indicative of confinement in QCD.
