Selective highly charged ions as the prospective optical clock candidates with quality factors larger than $10^{15}$

Abstract

We propose here a few selective highly charged ions (HCIs), namely Ni${}^{12+}$ and Cu${}^{13+}$, Pd${}^{12+}$ and Ag${}^{13+}$, that not only promise to be very high accurate optical clocks below $10^{-19}$ uncertainties, but also offer quality factors larger than $10^{15}$ and yet possess simple atomic structures for the experimental set-up. Moreover, these ions have strong optical magnetic-dipole (M1) transitions than the previously proposed HCI clocks. They can be used for the cooling and detection techniques. To demonstrate the projected fractional uncertainties below $10^{-19}$ level, we have estimated the typical orders of magnitudes due to many of the conventional systematics manifested in an atomic clock experiment, such as Zeeman, Stark, black-body radiation, and electric quadrupole shifts, by performing calculations of the relevant atomic properties.

5 pages

References in corpus (3)

• Highly-charged ions for atomic clocks, quantum information, and search for $\alpha$-variation
• Optical transitions in highly-charged californium ions with high sensitivity to variation of the fine-structure constant
• Magnetic-dipole transitions in highly-charged ions as a basis of ultra-precise optical clocks

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