High accuracy correction of blackbody radiation shift in an optical lattice clock

2012/08/31 by Thomas Middelmann, Stephan Falke, Christian Lisdat +1 · 1 citation
Physics and Astronomy · #physics.atom-ph #physics.optics #quant-ph

paper · pdf · doi:10.1103/physrevlett.109.263004

published as Phys. Rev. Lett. 109, 263004 (2012) · 9 pages, 4 figures, including appendix with supplementary text. Version 2 with adjusted value of differential static polarizability due to field plate separation measurement

arxiv created 2012/10/29 · arxiv updated 2013/01/01

Abstract

We have determined the frequency shift that blackbody radiation is inducing on the 5s^{2 1}S₀ -- 5s5p ³P₀ clock transition in strontium. Previously its uncertainty limited the uncertainty of strontium lattice clocks to 1×10^-16. Now the uncertainty associated to the black body radiation shift correction translates to 5× 10^-18 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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