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.

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., Safronova, M., Bromley, S., & 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: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 104
• Issue: 5
• Article Number: 052813
• DOI: https://doi.org/10.1103/physreva.104.052813
• Public URL: https://durham-repository.worktribe.com/output/1226782
• Related Public URLs: https://arxiv.org/abs/2110.00043