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A: Fachverband Atomphysik
A 11: Precision Measurements and Metrology: Optical Clocks (with Q)
A 11.3: Vortrag
Montag, 6. März 2017, 17:30–17:45, P 104
Relative field sensitivities in 171Yb+ transitions — •Richard Lange, Nils Huntemann, Christian Sanner, Christian Tamm, Burghard Lipphardt, and Ekkehard Peik — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
The 171Yb+ ion exhibits two transitions that are employed in our setup of a single-ion optical frequency standard, the 2S1/2 → 2D3/2 electric quadrupole (E2) [PRA 89, 023820] and the 2S1/2 → 2F7/2 electric octupole (E3) [PRL 108, 090801] transition. In order to provide a frequency standard with highest accuracy, deviations from the unperturbed transition frequencies due to external perturbations have to be taken into account and corrected for. In particular, the effects related to external magnetic and electric fields as well as field gradients need to be investigated. The significantly higher sensitivity of the E2 transition frequency to these perturbations allows for an examination of the E3 transition frequency shifts on a magnified scale.
With precise information about the relative field sensitivities, uncertainties in the E3 transition frequency due to field perturbations can be reduced: Shifts of the E3 transition frequency can be corrected more accurately analyzing changes in the E2 transition frequency than measuring the fields and field gradients directly. In this talk we present improved measurement results of the relative field sensitivities of the E2 and E3 transition frequencies and discuss the effects of these results on the uncertainty budgets of our frequency standards.