Observation of Spin Flips with a Single Trapped Proton

We have observed spin quantum-jumps with a single trapped proton for the first time. The result is a pioneering step forward in the endeavor to directly measure the magnetic properties of the proton and the antiproton with high precision, and was just published in Physical Review Letters. The measuring principle is based on the observation of a single proton stored in a Penning trap.


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