A compact cold atom cavity clock

A sample of laser cooled atoms are created inside an additively manufactured loop-gap microwave cavity using a grating magneto-optic trap requiring only a single laser cooling beam. Using a Ramsey excitation scheme with free evolution times of up to 20 ms and based on the 87 Rb ground-state clock tr...

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Bibliographic Details
Published in:Journal of physics. Conference series 2024-11, Vol.2889 (1), p.12034
Main Authors: Bregazzi, A., Batori, E., Lewis, B., Affolderbach, C., Mileti, G., Griffin, P., Riis, E.
Format: Article
Language:English
Subjects:
Brittleness
Cold atoms
Laser cooling
Signal to noise ratio
Stability
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Summary:A sample of laser cooled atoms are created inside an additively manufactured loop-gap microwave cavity using a grating magneto-optic trap requiring only a single laser cooling beam. Using a Ramsey excitation scheme with free evolution times of up to 20 ms and based on the 87 Rb ground-state clock transition, we demonstrate a short-term stability of 1.5×10 −11 τ −1/2 , averaging down to 2×10 −12 after 100 s. The short-term stability limit is found to be dominated by the signal to noise ratio of the Ramsey fringes while for longer timescales the limitation is magnetic field noise due to the experiment being magnetically unshielded. Potential improvements to the setup and its operation point to a viable route forward for a miniaturised atomic microwave clock.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2889/1/012034