Magic wavelength of the $^{138}\mathrm{Ba}^{+}$ $6s$ $^{2}S_{1/2}--5d$ $^{2}D_{5/2}$ clock transition

Magic wavelength of the ${}^{138}{Ba}^{+}$ $6 s$ ${}^{2}S_{1 / 2} - 5 d$ ${}^{2}D_{5 / 2}$ clock transition

S. R. Chanu, V. P. W. Koh, K. J. Arnold, R. Kaewuam, T. R. Tan, Zhiqiang Zhang, M. S. Safronova, and M. D. Barrett

Phys. Rev. A 101, 042507 – Published 22 April 2020

Abstract

The zero crossing of the dynamic differential scalar polarizability of the $S_{1 / 2} - D_{5 / 2}$ clock transition in ${}^{138}{Ba}^{+}$ has been determined to be $459.1614 (28) THz$ . Together with previously determined matrix elements and branching ratios, this tightly constrains the dynamic differential scalar polarizability of the clock transition over a large wavelength range ( $≳ 700 nm$ ). In particular, it allows an estimate of the blackbody radiation shift of the clock transition at room temperature.

Received 28 October 2019
Revised 5 March 2020
Accepted 26 March 2020

DOI:https://doi.org/10.1103/PhysRevA.101.042507

Physics Subject Headings (PhySH)

Atomic & molecular structure Atomic, optical & lattice clocks

Atomic, Molecular & Optical

Authors & Affiliations

S. R. Chanu¹, V. P. W. Koh², K. J. Arnold¹, R. Kaewuam¹, T. R. Tan^1,2, Zhiqiang Zhang¹, M. S. Safronova^3,4, and M. D. Barrett ^1,2,*

¹Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore
²Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore
³Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
⁴Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, Maryland 20742, USA