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Q: Fachverband Quantenoptik und Photonik

Q 14: Precision Measurements and Metrology

Q 14.5: Vortrag

Dienstag, 10. März 2020, 12:00–12:15, a310

Lifetime Measurement of the Cesium 5D_5/2 State with Open Data Availability — •Sebastian Pucher^1,2, Philipp Schneeweiss^1,2, Arno Rauschenbeutel^1,2, and Alexandre Dareau^1,3 — ¹Vienna Center for Quantum Science and Technology, TU Wien – Atominstitut, Stadionallee 2, 1020 Vienna, Austria — ²Institut für Physik, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany — ³Laboratoire Charles Fabry, Institut d’Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France

We measure the lifetime of the cesium 5D_5/2 state using a time-resolved single-photon-counting method. We excite atoms in a hot vapor cell via an electric quadrupole transition at a wavelength of 685 nm and record the fluorescence of a cascade decay at a wavelength of 852 nm. We extract a lifetime of the 5D_5/2 state of 1356(9) ns. Our value clearly deviates from the previous experimental literature values [1, 2] but is very well in agreement with a recent theoretical prediction [3]. As we also discuss in the talk, we aim to further improve the transparency of studies of this kind by sharing our measurement outcomes and evaluations via an open-access repository.

[1] D. DiBerardino et al., Phys. Rev. A 57, 4204 (1998)
[2] B. Hoeling et al., Opt. Lett. 21, 74 (1996)
[3] M.S. Safronova et al., Phys. Rev. A 94, 012505 (2016)