Sr+88 445-THz single-ion reference at the 10 -17 level via control and cancellation of systematic uncertainties and its measurement against the SI second

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.109.203002
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TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume109
Issue20
Article number203002
Pages# of pages: 4
SubjectAbsolute frequency measurements; Center frequency; Ion transition; Laser-cooled; Optical frequency standard; Polarizabilities; Single ion; Strontium ion; Systematic uncertainties; Time transfer; Frequency standards; Ions; Strontium; Uncertainty analysis
AbstractWe describe experiments and measurements on a trapped and laser-cooled single ion of Sr+88 which, when probed on its reference 5sS1/22→4dD5/22 transition at 445THz, provides an optical frequency standard of evaluated accuracy outperforming the current realization of the SI second. Studies are presented showing that micromotion-associated shifts of the standard can be reduced to the 10 -18 level and uncertainties in the blackbody-induced shifts for the current system are at the low 10 -17 level due to the relatively well-known polarizability of the strontium ion system and careful choice of the trap structure. The current evaluated systematic shifts for the ion transition are at a fractional uncertainty of 2×10 -17. An absolute frequency measurement performed over a two-month period relative to a maser referenced to the SI second via Global Positioning System time transfer has determined the center frequency for the transition at ν SD= 444779044095485.5±0.9Hz (1σ).
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Measurement Science and Standards
Peer reviewedYes
NPARC number21269546
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Record identifier274298e0-fe5e-48f5-8e2a-99255f633147
Record created2013-12-12
Record modified2016-05-09
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