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Yes. If you take an electron beam, put it through an [electron] beam splitter, put half through a magnetic field that would spin the electron around once, and
by evanb 6y ago
Yes. If you take an electron beam, put it through an [electron] beam splitter, put half through a magnetic field that would spin the electron around once, and recombine the beams you will see interference effects.
- l33tman 6y agoThanks, yeah think I've read about that version before. But "the magnetic field spins the electron around once", doesn't this feel a bit weak? You could conceivably just define "spin around once" as the B-field manipulation that returns the amplitude to +1, not -1. How do you define the B-field interaction in a way that is comparable to "spinning something around once"? I'm not trying to be annoying :) I feel this really is at the core of the spin-1/2 "rotate twice to rotate completely" confusion.. Because it's the "rotation" in comparison to the surroundings that cause the change in amplitude, a global rotation of the electron particle and the rest of the universe doesn't cause the electron to change amplitude, as then it's just a global coordinate transformation.
- evanb 6y agoWell, if you took a little bar magnet and shot it through it'd go around one time.