Lead author, Nature Photonics paper
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Last updated Nov 8, 2026
Researcher in the Regensburg collaboration
Physicists in Regensburg have timed a single electron tunneling through an energy barrier to within a fraction of a femtosecond. The measurement, published in Nature Photonics, is the first to watch an electron's quantum motion at both atomic spatial scale and attosecond time scale.
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