Researchers at Delft University of Technology in the Netherlands have succeeded in observing the magnetic nucleus of a single atom switching between states in real time. They measured the nuclear “spin” by detecting its influence on the electrons of the same atom using the needle of a scanning tunneling microscope. Unexpectedly, the spin remained stable for several seconds, opening new possibilities for precise control of nuclear magnetism. The study, published in Nature Communications, represents progress toward quantum sensing at the atomic level.
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