Andrew D. Ludlow

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20012026

most citedAtomic clock performance beyond the geodetic limit

732 citations · 915 across the 14 of their papers we have counts for

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Showing 2025Show all

3 papers · 1 filter

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★ 12 cited

Cryogenic Optical Lattice Clock with $1.7 \times 1 0^{- 20}$ Blackbody Radiation Stark Uncertainty

Youssef S. Hassan, Kyle Beloy, Jacob L. Siegel +9

Controlling the Stark perturbation from ambient thermal radiation is key to advancing the performance of many atomic frequency standards, including state-of-the-art optical lattice…

physics.optics2025

Radio Frequency from Optical with Instabilities below $1 0^{- 15}$ - Generation and Measurement

A. Hati, M. Pomponio, N. V. Nardelli +7

This paper presents a frequency synthesis that achieves exceptional stability by transferring optical signals to the radio frequency (RF) domain at 100 MHz. We describe and charact…

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

Cryogenic Optical Lattice Clock with 1.7×10−20 Blackbody Radiation Stark Uncertainty

Radio Frequency from Optical with Instabilities below 10−15- Generation and Measurement

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

Cryogenic Optical Lattice Clock with $1.7 \times 1 0^{- 20}$ Blackbody Radiation Stark Uncertainty

Radio Frequency from Optical with Instabilities below $1 0^{- 15}$ - Generation and Measurement