Faraday-Shielded dc Stark-Shift-Free Optical Lattice Clock
Open accessAbstract
We demonstrate the absence of a dc Stark shift in an ytterbium optical lattice clock. Stray electric fields are suppressed through the introduction of an in-vacuum Faraday shield. Still, the effectiveness of the shielding must be experimentally assessed. Such diagnostics are accomplished by applying high voltage to six electrodes, which are grounded in normal operation to form part of the Faraday shield. Our measurements place a constraint on the dc Stark shift at the 10^{-20} level, in units of the clock frequency. Moreover, we discuss a potential source of error in strategies to precisely measure or cancel nonzero dc Stark shifts, attributed to field gradients coupled with the finite spatial extent of the lattice-trapped atoms. With this consideration, we find that Faraday shielding, complemented with experimental validation, provides both a practically appealing and effective solution to the problem of dc Stark shifts in optical lattice clocks.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The thermal shields facilitate characterisation of Stark effects from blackbody radiation and provide an in-situ Faraday enclosure shielding the atoms from static electric fields.
“This facilitates characterisation of a key systematic effect afflicting optical clocks, Stark effects from blackbody radiation bathing the ultracold atoms, and further provides an insitu Faraday enclosure shielding the atoms from static electric fields due to stray charges on the vacuum apparatus 24 .”
From Atomic clock performance enabling geodesy below the centimetre level (2018) · cites this paper as [23]
The BBR shift is characterised at better than the part-per-thousand level by means of an in-vacuum thermal shield.
“This shift is characterised at better than the part-per-thousand level by means of an in-vacuum thermal shield that provides the atoms with a near-ideal blackbody environment.”
From Atomic clock performance enabling geodesy below the centimetre level (2018) · cites this paper as [23]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
The citation lists haven’t been fetched yet
References 19 · Cited by 20
- Authors
- Beloy, K., Zhang, X., McGrew, W. F., Hinkley, N., Yoon, T. H., Nicolodi, D., Fasano, R. J., Schäffer, S. A., Brown, R. C., & Ludlow, A. D.
- Affiliations
- National Institute of Standards and Technology (US)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2018-05-02
- Volume
- 120
- Issue
- 18
- Pages
- 183201-183201
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2794962505
- Cited by
- 20
- References
- 19
- Citations by year
- 2025: 5 · 2024: 1 · 2022: 7 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 2
- FWCI
- 0.81
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Licence
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Institute of Standards and Technology
- National Aeronautics and Space Administration
- Defense Advanced Research Projects Agency
- 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 Subatomic Physics Research
- Physical Sciences › Computer Science › Computer Networks and Communications › Network Time Synchronization Technologies
- Keywords
- optical lattice clock, Faraday shield, ytterbium, stray electric fields, field gradient, clock frequency stability, trapped atoms
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 ›
Are you an author, or do you see a problem with this page? Request a review
