Narrow-line cooling and determination of the magic wavelength of Cd

A. Yamaguchi, M. S. Safronova, K. Gibble, H. Katori

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Abstract

We experimentally and theoretically determine the magic wavelength of the (5s2)S10-(5s5p)P03 clock transition of Cd111 to be 419.88(14) and 420.1(7) nm. To perform Lamb-Dicke spectroscopy of the clock transition, we use narrow-line laser cooling on the S10-P31 transition to cool the atoms to 6 μK and load them into an optical lattice. Cadmium is an attractive candidate for optical lattice clocks because it has a small sensitivity to blackbody radiation and its efficient narrow-line cooling mitigates higher order light shifts. We calculate the blackbody shift, including the dynamic correction, to be fractionally 2.83(8)×10-16 at 300 K, an order of magnitude smaller than that of Sr and Yb. We also report calculations of the Cd P11 lifetime and the ground state C6 coefficient.

Original languageEnglish (US)
Article number113201
JournalPhysical Review Letters
Volume123
Issue number11
DOIs
Publication statusPublished - Sep 13 2019

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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