Extended Data Fig. 3: Measured ΔEZ oscillation frequency as a function of external magnetic field Bz.

Linear fit to the data above 100 mT shows dependence of 7.21 MHz/T, corresponding to a g-factor gradient Δg = g1 − g2 = 5.15 × 10−4.
Linear fit to the data above 100 mT shows dependence of 7.21 MHz/T, corresponding to a g-factor gradient Δg = g1 − g2 = 5.15 × 10−4.