Atomic Clock with 1 × 10 − 18 Room-Temperature Blackbody Stark Uncertainty
Open accessAbstract
The Stark shift due to blackbody radiation (BBR) is the key factor limiting the performance of many atomic frequency standards, with the BBR environment inside the clock apparatus being difficult to characterize at a high level of precision. Here we demonstrate an in-vacuum radiation shield that furnishes a uniform, well-characterized BBR environment for the atoms in an ytterbium optical lattice clock. Operated at room temperature, this shield enables specification of the BBR environment to a corresponding fractional clock uncertainty contribution of 5.5×10(-19). Combined with uncertainty in the atomic response, the total uncertainty of the BBR Stark shift is now 1×10(-18). Further operation of the shield at elevated temperatures enables a direct measure of the BBR shift temperature dependence and demonstrates consistency between our evaluated BBR environment and the expected atomic response.
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These clocks are based on optical transitions, in which greater oscillation frequency leads to an increase of 10^5 in the quality factor of the transition and concomitant performance improvements.
“These clocks are based on optical transitions, in which greater oscillation frequency leads to an increase of 10 5 in the quality factor of the transition and concomitant performance improvements 22 .”
From Atomic clock performance enabling geodesy below the centimetre level (2018) · cites this paper as [22]
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Self-citation
- Authors
- Beloy, K., Hinkley, N., Phillips, N. B., Sherman, J. A., Schioppo, M., Lehman, J., Feldman, A., Hanssen, L. M., Oates, C. W., & Ludlow, A. D.
- Affiliations
- National Institute of Standards and Technology (US)
- ORCID
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2014-12-24
- Volume
- 113
- Issue
- 26
- Pages
- 260801-260801
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1754936697
- Cited by
- 137
- References
- 24
- Citations by year
- 2026: 5 · 2025: 13 · 2024: 8 · 2023: 10 · 2022: 10 · 2021: 7 · 2020: 10 · 2019: 15 · 2018: 18 · 2017: 14 · 2016: 16 · 2015: 11
- FWCI
- 6.80
- 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
- National Institute of Standards and Technology
- National Aeronautics and Space Administration
- Defense Sciences Office, DARPA
- DARPA QuASAR
- DARPA PULSE
- NRC-RAP
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Scientific Measurement and Uncertainty Evaluation
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Keywords
- blackbody radiation, Stark shift, atomic clocks, radiation shielding, room-temperature operation, clock uncertainty
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