Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session E06: Cold and Ultracold Multielectron Atoms
2:00 PM–3:48 PM,
Tuesday, June 1, 2021
Chair: Dan Stamper-Kurn, UC Berkeley
Abstract: E06.00007 : Two-photon Resolved-Sideband Raman Cooling of171Yb in an optical cavity.*
3:12 PM–3:24 PM
Moreover, it has been recently demonstrated that high-finesse optical cavities can significantly enhance the performances of optical lattice clocks (through quantum nondemolition measurements and/or many-body entanglement). The strong coupling between the optical cavity and the atomic ensemble represents another complication in the cooling process.
We demonstrate a resolved Raman sideband cooling of an ensemble of 171Yb coupled to a high-finesse optical cavity, without the assistance of atomic collisions. The atomic temperature in the tightly binding direction reaches1.8±0.5μK with average vibration numbern= 0.2 in 200 ms, while that of the other direction remains 8μK. Such low temperature enables us to perform an optical Rabi π-pulse with transfer probability exceeding 93% on the ultranarrow optical clock transition.
We further notice atoms self-organize into locations with maximal atom-photon-interaction. This also maximizes the metrological improvement provided by the high-finesse optical cavity.
*DARPA; ONR; CUA
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