William Warfield

activity

20242026

8 \times 1 0^{- 19}

systematic uncertainty

206 citations · 260 across the 5 of their papers we have counts for

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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

Atomic Coherence of 2 minutes and Instability of 1.5E-18 at 1 s in a Wannier-Stark Lattice Clock

Kyungtae Kim, Alexander Aeppli, William Warfield +3

We explore the limits of atomic coherence and measurement precision in a 87Sr optical lattice clock. We perform a detailed characterization of key effects, including lattice Raman…

physics.atom-ph2025★ 54 cited

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{τ/\mathrm{s…

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

Atomic Coherence of 2 minutes and Instability of 1.5E-18 at 1 s in a Wannier-Stark Lattice Clock

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