This is something I have been wished it existed since Back to the Future’s Mr Fusion. I don’t think it’s possible to build it. My understanding (as a layman) is

This is something I have been wished it existed since Back to the Future’s Mr Fusion. I don’t think it’s possible to build it. My understanding (as a layman) is that you either need energies which melt all solid matter, or you either need impossibly high precision, to a point where you can play snooker with individual atoms. But that level of control also requires high energy, and you are back to square one