A Discovery That Could Form The Core of a Workable Quantum Computer

I read something recently which I could tell had some unexpected possibilities beyond what one might have immediately thought. Research at Brown University which involved sending a stream of electrons into a container of liquid helium. There is a quantum interference at the surface of the liquid helium with some section of the wave function reflecting from the surface and some section entering the liquid helium where it forms an actual observable bubble strangely enough. Here is a link: Can the Wave Function of an Electron be Divided and Trapped? After I thought about the article for a day or so, I began to see that what they were describing was actually an extremely stable system that was performing a quantum calculation, in short, exactly the sort of system which could form the basis for a quantum computer. But how could this device they describe be turned into some sort of controllable, programmable calculator? Just as it stands, it seems that the device can probably be used to do factoring, so it could break cryptography. But it has more possibility than this. The injection of the electron and the detection of the electron wave sections at the bottom should be relatively simple electronics, so one does not need a quantum device to program or insert data into one's quantum calculator. The input can be controlled by relatively simple electronics which are controlled by a standard computer. The velocity with which the electron is injected can doubtless be controlled within some range to alter the quantities the device calculates. One can easily imagine a bank of these devices, say 16 or 1024 running in parallel with their input controlled by a single standard computer, and the output interpreted and fed back into the input for further calculation. The devices could even be clustered so that electron wave function of several tubes could interfere with each other allowing another level of calculation. There is even the possibility that one could put a detector on the input tube that detected electrons heading back up the tube. If the experiment behaved like the dual slit experiment, one should see the wave function collapse into two possible states, so one should have something like a switching function.