Improved Limit on a Temporal Variation ofmp/mefrom Comparisons ofYb+and Cs Atomic Clocks
Open accessAbstract
Accurate measurements of different transition frequencies between atomic levels of the electronic and hyperfine structure over time are used to investigate temporal variations of the fine structure constant α and the proton-to-electron mass ratio μ. We measure the frequency of the (2)S1/2→(2)F7/2 electric octupole (E3) transition in (171)Yb(+) against two caesium fountain clocks as f(E3)=642,121,496,772,645.36 Hz with an improved fractional uncertainty of 3.9×10(-16). This transition frequency shows a strong sensitivity to changes of α. Together with a number of previous and recent measurements of the (2)S1/2→(2)D3/2 electric quadrupole transition in (171)Yb(+) and with data from other elements, a least-squares analysis yields (1/α)(dα/dt)=-0.20(20)×10(-16)/yr and (1/μ)(dμ/dt)=-0.5(1.6)×10(-16)/yr, confirming a previous limit on dα/dt and providing the most stringent limit on dμ/dt from laboratory experiments.
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Comparing resonance frequencies of optical clocks has led to new tests of fundamental physics, such as bounding the time variation of fundamental constants.
“Thanks to these unparalleled performances, comparing the resonance frequencies of optical clocks has led to new tests of fundamental physics, such as bounding the time variation of fundamental constants [7,8].”
From Test of Special Relativity Using a Fiber Network of Optical Clocks (2017) · cites this paper as [7]
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- Authors
- Huntemann, N., Lipphardt, B., Tamm, C., Gerginov, V., Weyers, S., & Peik, E.
- Affiliations
- Physikalisch-Technische Bundesanstalt (DE)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2014-11-17
- Volume
- 113
- Issue
- 21
- Pages
- 210802-210802
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2047595182
- Cited by
- 366
- References
- 38
- Citations by year
- 2026: 6 · 2025: 31 · 2024: 26 · 2023: 22 · 2022: 19 · 2021: 31 · 2020: 37 · 2019: 40 · 2018: 43 · 2017: 38 · 2016: 39 · 2015: 31 · 2014: 3
- FWCI
- 18.34
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Deutsche Forschungsgemeinschaft
- European Metrology Research Programme (SIB04)
- EURAMET
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Molecular Physics
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Scientific Measurement and Uncertainty Evaluation
- Keywords
- proton-electron mass ratio, electric octupole transition, E2 transitions, hyperfine structure
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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