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Improved limits for violations of local position invariance from atomic clock comparisons

arXiv

Authors: R. Lange, N. Huntemann, J. M. Rahm, C. Sanner, H. Shao, B. Lipphardt, Chr. Tamm, S. Weyers, E. Peik

Year

2020

Paper ID

19981

Status

Preprint

Abstract Read

~2 min

Abstract Words

136

Citations

N/A

Abstract

We compare two optical clocks based on the ²S_1/2\(F=0\)→ {}²D_3/2\(F=2\) electric quadrupole (E2) and the ²S_1/2\(F=0\)→ {}²F_7/2\(F=3\) electric octupole (E3) transition of ¹⁷¹Yb⁺ and measure the frequency ratio ν_E3/ν_E2=0.932 829 404 530 965 376(32). We determine the transition frequency ν_E3=642 121 496 772 645.10(8) Hz using two caesium fountain clocks. Repeated measurements of both quantities over several years are analyzed for potential violations of local position invariance. We improve by factors of about 20 and 2 the limits for fractional temporal variations of the fine structure constant α to 1.0(1.1)times10^-18/yr and of the proton-to-electron mass ratio μ to -8(36)times10^-18/yr. Using the annual variation of the Sun's gravitational potential at Earth Φ, we improve limits for a potential coupling of both constants to gravity, \(c²/α\) (dα/dΦ)=14(11)times 10^-9 and \(c²/μ\) (dμ/dΦ)=7(45)times 10^-8.

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We compare two optical clocks based on the ^2S1/2(F=0) -> ^2D3/2(F=2) electric quadrupole (E2) and the ^2S1/2(F=0) -> ^2F7/2(F=3) electric octupole (E3) transition of ^171Yb^+...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2010.06620 [2] arXiv https://arxiv.org/abs/2010.06620 [3] Publisher https://arxiv.org/abs/2010.06620

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