Dahyeon Lee

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physics.atom-ph2026

Phase-continuous comparison of three all-optical time scales over 20 days

Dahyeon Lee, Kyungtae Kim, Zoey Z. Hu +11

Optical frequency standards have progressed rapidly over the past two decades, leading to the anticipated redefinition of the SI second by an optical frequency. However, time scale…

physics.atom-ph2025

Atomic clock frequency ratios with fractional uncertainty $\leq 3.2 \times 1 0^{- 18}$

Alexander Aeppli, Willa J. Arthur-Dworschack, Kyle Beloy +24

We report high-precision frequency ratio measurements between optical atomic clocks based on $^{27}$ Al $^{+}$ , $^{171}$ Yb, and $^{87}$ Sr. With total fractional uncertainties at or bel…

physics.atom-ph2025

A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering

Lingfeng Yan, Stefan Lannig, William R. Milner +5

Highly frequency-stable lasers are a ubiquitous tool for optical frequency metrology, precision interferometry, and quantum information science. While making a universally applicab…

physics.atom-ph2025

High-Stability Single-Ion Clock with $5.5 \times 1 0^{- 19}$ Systematic Uncertainty

Mason C. Marshall, Daniel A. Rodriguez Castillo, Willa J. Arthur-Dworschack +10

We report a single-ion optical atomic clock with fractional frequency uncertainty of $5.5 \times 1 0^{- 19}$ and fractional frequency stability of $3.5 \times10^{-16}/\sqrt{Ï/\mathrm{…

Phase-continuous comparison of three all-optical time scales over 20 days

Atomic clock frequency ratios with fractional uncertainty ≤3.2×10−18

A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering

High-Stability Single-Ion Clock with 5.5×10−19 Systematic Uncertainty

Atomic clock frequency ratios with fractional uncertainty $\leq 3.2 \times 1 0^{- 18}$

High-Stability Single-Ion Clock with $5.5 \times 1 0^{- 19}$ Systematic Uncertainty