Precision spectroscopy in Yb+ ions

Abstract

We report on our progress on multi-ion spectroscopy with Yb+ ions. We first characterized the spatial homogeneity of the magnetic- and the rf-field. Subsequently, to equalize the immense AC Stark shifts of the individual ions in a Coulomb crystal, we utilize a holographic phase plate to convert the Gaussian beam into a flat-top shape. These efforts enable us to excite an 8-ion crystal (172Yb+) on the highly forbidden electric octupole transition. Using 173Yb+ with reduced AC Stark shift, the same beam profile could support the multi-ion operation of 20 ions. This paves the way for future multi-ion optical clocks.

References in corpus (11)

• Hyper-Ramsey Spectroscopy of Optical Clock Transitions
• Search for variation of the fundamental constants in atomic, molecular and nuclear spectra
• Linear Paul trap design for an optical clock with Coulomb crystals
• Controlling systematic frequency uncertainties at the $10^{-19}$ level in linear Coulomb crystals
• Efficient atomic clocks operated with several atomic ensembles
• New ideas for tests of Lorentz invariance with atomic systems
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• Lifetime of the ${}^2{F}_{7/2}$ level in Yb${}^{+}$ for spontaneous emission of electric octupole radiation
• Evaluation of a ${}^{88}$Sr${}^{+}$ optical clock with a direct measurement of the blackbody radiation shift and determination of the clock frequency
• Hyperfine-induced electric dipole contributions to the electric octupole and magnetic quadrupole atomic clock transitions
• Robust and scalable rf spectroscopy in first-order magnetic sensitive states at second-long coherence time