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Blackbody radiation shift in strontium lattice clocks revisited

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Christian Lisdat
  • Soren Dörscher
  • I. Nosske
  • Uwe Sterr

External Research Organisations

  • Physikalisch-Technische Bundesanstalt PTB

Details

Original languageEnglish
Article numberL042036
JournalPhysical Review Research
Volume3
Issue number4
Publication statusPublished - 9 Dec 2021
Externally publishedYes

Abstract

We reevaluate the blackbody radiation (BBR) induced ac-Stark shift of the strontium clock transition (5s5p)P03-(5s2)S01 at 698nm used as reference in optical lattice clocks and as secondary representation of the SI unit "second."At room temperature, this frequency shift is on the order of 5×10-15 of the transition frequency and causes the largest correction in strontium lattice clocks. With the ongoing reduction of measurement uncertainties of optical clocks, an assessment of the approximations made in the evaluation of the BBR shift is advised. Our reevaluation leads to an increase of the BBR correction by 4×10-18 for clock operation at 300K, considerably larger than its present uncertainty of 1.6×10-18. Consistently describing accurately known atomic properties with an atomic structure model, we reduce the fractional uncertainty of the atomic response to 1×10-18 at 300K, which allows operating Sr lattice clocks with an uncertainty of 1×10-18 at room temperature.

ASJC Scopus subject areas

Cite this

Blackbody radiation shift in strontium lattice clocks revisited. / Lisdat, Christian; Dörscher, Soren; Nosske, I. et al.
In: Physical Review Research, Vol. 3, No. 4, L042036, 09.12.2021.

Research output: Contribution to journalArticleResearchpeer review

Lisdat, C, Dörscher, S, Nosske, I & Sterr, U 2021, 'Blackbody radiation shift in strontium lattice clocks revisited', Physical Review Research, vol. 3, no. 4, L042036. https://doi.org/10.1103/physrevresearch.3.l042036
Lisdat, C., Dörscher, S., Nosske, I., & Sterr, U. (2021). Blackbody radiation shift in strontium lattice clocks revisited. Physical Review Research, 3(4), Article L042036. https://doi.org/10.1103/physrevresearch.3.l042036
Lisdat C, Dörscher S, Nosske I, Sterr U. Blackbody radiation shift in strontium lattice clocks revisited. Physical Review Research. 2021 Dec 9;3(4):L042036. doi: 10.1103/physrevresearch.3.l042036
Lisdat, Christian ; Dörscher, Soren ; Nosske, I. et al. / Blackbody radiation shift in strontium lattice clocks revisited. In: Physical Review Research. 2021 ; Vol. 3, No. 4.
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N1 - Funding Information: We acknowledge support by the Project 18SIB05 ROCIT, which has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 Research and Innovation Programme, and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy–EXC-2123 QuantumFrontiers, Project-ID 390837967; SFB 1464 TerraQ, Project-ID 434617780, within Project A04; and SFB 1227 DQ-mat, Project-ID 274200144, within Project B02. This work was partially supported by the Max Planck-RIKEN-PTB Center for Time, Constants and Fundamental Symmetries funded equally by the three partners.

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