A common-mode approach for minimizing motion-induced frequency shifts in optical ion clocks

Reaching utmost accuracy with optical atomic clocks requires precise control over the motional degrees of freedom of the spectroscopically probed atoms. Especially for clocks based on trapped ions, the motional heating during the spectroscopic interrogation can lead to significant clock errors due to motion-induced Doppler shifts and Stark shifts. The cancelation of probe-light induced frequency shifts indirectly also depends on the ion's motional state. For the case of the 467 nm electric octupole clock transition in singly-charged ytterbium we analyze the combined effect of these shift mechanisms and describe new ways to characterize and minimize them.