Measurement of the tune-out wavelength for 133Cs at 880nm

Ratkata, A.; Gregory, P.D.; Innes, A.D.; Matthies, J.A.; McArd, L.A.; Mortlock, J.M.; Safronova, M.S.; Bromley, S.L.; Cornish, S.L.

doi:10.1103/physreva.104.052813

Measurement of the tune-out wavelength for 133Cs at 880nm

Ratkata, A.; Gregory, P.D.; Innes, A.D.; Matthies, J.A.; McArd, L.A.; Mortlock, J.M.; Safronova, M.S.; Bromley, S.L.; Cornish, S.L.

Authors

Mew Ratkata apichayaporn.ratkata@durham.ac.uk
PGR Student Doctor of Philosophy

P.D. Gregory

Andrew Innes andrew.d.innes@durham.ac.uk
PGR Student Doctor of Philosophy

Alex Matthies jonas.a.matthies@durham.ac.uk
Postdoctoral Research Associate

L.A. McArd

Jonathan Mortlock jonathan.m.mortlock@durham.ac.uk
Postdoctoral Research Associate

M.S. Safronova

S.L. Bromley

Professor Simon Cornish s.l.cornish@durham.ac.uk
Professor

Abstract

We perform a measurement of the tune-out wavelength, λ 0 , between the D 1 , 6 2 S 1 / 2 → 6 2 P 1 / 2 , and D 2 , 6 2 S 1 / 2 → 6 2 P 3 / 2 , transitions for 133 Cs in the ground hyperfine state ( F = 3 , m F = + 3 ) . At λ 0 , the frequency-dependent scalar polarizability is zero leading to a zero scalar ac Stark shift. We measure the polarizability as a function of wavelength using Kapitza-Dirac scattering of a 133 Cs Bose-Einstein condensate in a one-dimensional optical lattice, and determine the tune-out wavelength to be λ 0 = 880.21790 ( 40 ) stat ( 8 ) sys nm. From this measurement we determine the ratio of reduced matrix elements to be ∣ ∣ ⟨ 6 P 3 / 2 ∥ d ∥ 6 S 1 / 2 ⟩ ∣ ∣ 2 / ∣ ∣ ⟨ 6 P 1 / 2 ∥ d ∥ 6 S 1 / 2 ⟩ ∣ ∣ 2 = 1.9808 ( 2 ) . This represents an improvement of a factor of 10 over previous results derived from excited-state lifetime measurements. We use the present measurement as a benchmark test of high-precision theory.

Citation

Ratkata, A., Gregory, P., Innes, A., Matthies, J., McArd, L., Mortlock, J., …Cornish, S. (2021). Measurement of the tune-out wavelength for 133Cs at 880nm. Physical Review A, 104(5), Article 052813. https://doi.org/10.1103/physreva.104.052813

Journal Article Type	Article
Acceptance Date	Nov 3, 2021
Online Publication Date	Nov 22, 2021
Publication Date	2021-11
Deposit Date	Nov 2, 2021
Publicly Available Date	Feb 2, 2022
Journal	Physical Review A
Print ISSN	1050-2947
Electronic ISSN	1094-1622
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	104
Issue	5
Article Number	052813
DOI	https://doi.org/10.1103/physreva.104.052813
Related Public URLs	https://arxiv.org/abs/2110.00043

Files

Published Journal Article (683 Kb)
PDF

Copyright Statement
Reprinted with permission from the American Physical Society: Ratkata, A., Gregory, P.D., Innes, A.D., Matthies, J.A., McArd, L.A., Mortlock, J.M., Safronova, M.S., Bromley, S.L. & Cornish, S.L. (2021). Measurement of the tune-out wavelength for 133Cs at 880nm. Physical Review A 104(5): 052813. © (2021) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.