High Accuracy Correction of Blackbody Radiation Shift in an Optical Lattice Clock

Thomas Middelmann, Stephan Falke, Christian Lisdat, and Uwe Sterr
Phys. Rev. Lett. 109, 263004 – Published 27 December 2012
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Abstract

We have determined the frequency shift that blackbody radiation is inducing on the 5s2 S015s5p P03 clock transition in strontium. Previously its uncertainty limited the uncertainty of strontium lattice clocks to 1×1016. Now the uncertainty associated with the blackbody radiation shift correction translates to a 5×1018 relative frequency uncertainty at room temperature. Our evaluation is based on a measurement of the differential dc polarizability of the two clock states and on a modeling of the dynamic contribution using this value and experimental data for other atomic properties.

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  • Received 14 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.263004

© 2012 American Physical Society

Authors & Affiliations

Thomas Middelmann, Stephan Falke*, Christian Lisdat, and Uwe Sterr

  • Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany

  • *stephan.falke@ptb.de

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Issue

Vol. 109, Iss. 26 — 28 December 2012

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