- Conference date: 4-9 June 2000
- Location: Florence, Itlay
We report on the measurement of the g-factor of the electron bound in an atomic ion. A single hydrogenic ion is stored in a Penning trap. The electronic spin state of the ion is monitored via the continuous Stern-Gerlach effect in a quantum non-demolition measurement. Quantum jumps between the two spin states (spin up and spin down) are induced by a microwave field at the spin precession frequency of the bound electron. The g-factor of the bound electron is obtained by varying the microwave frequency and counting the number of spin flips for a fixed time interval. Applications of the continuous Stern-Gerlach effect include high-accuracy tests of bound-state quantum electrodynamics (QED), the measurement of the atomic mass of the electron, the determination of the fine structure constant α, and the measurement of nuclear g-factors.
- G factor
- Quantum electrodynamic effects
- Quantum measurement theory
- Quantum effects
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