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I was watching a lecture on quantum mechanics, and the lecturer was talking about the 720 degree rotation required for a spin 1/2 particle to return to an identical state. I'm aware of this, but I was more interested in the experiment to show that there is an actual difference.

He described an experiment where neutrons where fired into the double slit experiment, and one of the beams was rotated 360 degrees, and maxima turned into minima and vise versa.

My question: how did the experimenters rotate the particles? I could imagine a magnetic field that rotates over distance and the poles on both sides of the apparatus being identical, but I'm not sure if that's the method used.

So am I right in thinking that, or did they use another method?

Thanks in advance

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# Spin 1/2 and 720 degree rotation

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