Dual-Platform Precision Measurement of the 3 2D 5/2 to 4 2S 1/2 g-Factor Ratio in 40 Ca+
Researchers measured the ratio of Landé g-factors between two energy states of a Calcium ion using two different traps: a room-temperature Penning trap and a cryogenic surface electrode radiofrequency trap. Both methods yielded nearly identical results, providing a highly accurate ratio that significantly reduces uncertainty compared to previous work. This dual approach validates Ca+ as an excellent system for precision measurements.