K. Beloy

collaborators

4 papers

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

Direct measurement of the 3P0 clock state natural lifetime in 87Sr

Jonathan Dolde, Dhruva Ganapathy, Xin Zheng +3

Optical lattice clocks based on the narrow (5s2)1S0 - (5s5p)3P0 transition in neutral strontium (Sr) are among the most precise and accurate measurement devices in existence. Altho…

physics.atom-ph2025

Blackbody radiation Zeeman shift in Rydberg atoms

K. Beloy, B. D. Hunt, R. C. Brown +5

We consider the Zeeman shift in Rydberg atoms induced by room-temperature blackbody radiation (BBR). BBR shifts to the Rydberg levels are dominated by the familiar BBR Stark shift.…

physics.atom-ph2025

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…

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

Direct measurement of the 3P0 clock state natural lifetime in 87Sr

Blackbody radiation Zeeman shift in Rydberg atoms

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

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