According to current science what is the theoretically most tiny form of minigolf that could be made?

Do we have the technology to play minigolf using subatomic particles?

If the particles become waves when no one is looking that is ok a little cheating and magic is in the spirit of minigolf handwaving.

I am NOT talking about making a putter and golfball and snapping a cute shot I am dead serious I want to play the tiniest golf possible.