2006/07/17 by Brian Odom, David Hanneke, Brian D’Urso +1 · 2 citations
Physics and Astronomy · #Atomic and Molecular Physics #Nuclear Physics and Applications #Atomic and Subatomic Physics Research
paper · doi:10.1103/physrevlett.97.030801
openalex publication_date 2006/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/15
A new measurement resolves cyclotron and spin levels for a single-electron quantum cyclotron to obtain an electron magnetic moment, given by g/2=1.001 159 652 180 85 (76) [0.76 ppt]. The uncertainty is nearly 6 times lower than in the past, and g is shifted downward by 1.7 standard deviations. The new g, with a quantum electrodynamics (QED) calculation, determines the fine structure constant with a 0.7 ppb uncertainty--10 times smaller than for atom-recoil determinations. Remarkably, this 100 mK measurement probes for internal electron structure at 130 GeV.