  We introduce a novel real-time formulation of lattice NRQCD designed for
simulations in the background of an highly occupied gluon field. By evolving
quarks in the background of a dynamically evolving gluon field we computed the
time-evolution of heavy-quarkonium spectral functions as well as the static and
for finitely heavy quarks generalised potential. We conclude that the back
reaction of the quarks is necessary for any binding process. Here we discuss
the methodology, our results and the origin of the absence of a binding
process.
