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Hannover 2020 – scientific programme

The DPG Spring Meeting in Hannover had to be cancelled! Read more ...

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Q: Fachverband Quantenoptik und Photonik

Q 59: Ultra-cold atoms, ions, and BEC VII (joint session A/Q)

Q 59.5: Talk

Friday, March 13, 2020, 12:15–12:30, f303

Atom number stabilization with single-atom precisionAndreas Hüper1, Cebrail Pür1, •Mareike Hetzel1, Jiao Geng1, Mick Kristensen2, Jan Arlt2, and Carsten Klempt11Institut für Quantenoptik, Leibniz Universität Hannover, Germany — 2Institut for Fysik og Astronomi, Aarhus Universitet, Denmark

The preparation and evaluation of quantum states for optimal entanglement-enhanced metrology relies on an accurate determination of the number of atoms. We present an accurate fluorescence detection of atoms trapped in a miniature magneto-optical trap. We utilize the accurate atom number detection for a number stabilization of a laser-cooled atomic ensemble. For a target ensemble size of seven atoms prepared on demand, we achieve a 92 % preparation fidelity and reach number fluctuation 18 dB below the shot noise level using real-time feedback on the magneto-optical trap.

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