Atomic frequency standards are used to generate accurate and precise time and frequency,
enabling many communications, synchronization, and navigation systems in modern life …

Atomic frequency standards are used to generate accurate and precise time and frequency,
enabling many communications, synchronization, and navigation systems in modern life …

The accuracy of atomic isotope shift factors limits the extraction of nuclear charge radii from
isotope shift measurements because determining these factors is experimentally and …

We report on the development of a microwave frequency standard based on a lasercooled
171Yb+ ion trap system. The electronics, lasers, and magnetic shields are integrated into a …

We propose a high-performance atomic clock based on the 1.81 PHz transition between the
ground and first-excited state of doubly ionized lead. Utilizing an even isotope of lead, both …

We report a high-performance transportable microwave frequency standard scheme based
on sympathetically cooled 113 Cd+ ions using 40 Ca+ as coolant ions. A transportable …

We reported the realization of a 174 Yb+–113 Cd+ bi-species Coulomb crystal comprising
174 Yb+, a heavier ion, as coolant and verified the potential of applying a coolant ion with a …

The ion microwave frequency standard is a candidate for the next generation of microwave
frequency standard with the potential for very wide applications. The Dick effect and second …

We measured the ground-state hyperfine splitting of trapped^ 113Cd^+ ions to be
15199862855.02799 (27) Hz with a fractional uncertainty of 1.8× 10^− 14. The ions were …

We present the determination of the ground-state hyperfine splitting (⁠ ν HFS⁠) in laser-
cooled 171 Yb+ ions using our microwave quantum frequency standard (QFS). Employing …