While there does not seem to be a direct combination of QKD and PUF in that particular project, I wonder if that combination could be used to solve one of the problems of QKD: it is by itself not secure against a Man-in-the-Middle attack. Perhaps a PUF could solve that by some synergy with QKD (the issue seem to be: make it impossible for a MitM to appear holding the legitimate PUF, when he really is using the legitimate one remotely).
Are the QKD and PUF combined for that purpose? It yes, how, and how is it superior to the combination of classical crypto (which can solve MitM) and PUF (which should prevent cloning of the credentials), without QKD?
Reformulation: One problem with proof of ownership of a PUF (especially of the silicon memory kind envisioned in my first reference) is that they can be relayed, so that the verifier may believe he is interacting directly with the PUF, when in reality he is interacting with the PUF through some hostile proxy/MitM. My question is about using a quantum protocol to solve that, which hypothetically could make sense with some PUFs, e.g. optical. Perhaps this should be migrated to the physics site (but I have not the foggiest idea how).