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arXiv · 2305.02944

A cold-atom Ramsey clock with a low volume physics package

Alan Bregazzi·Etienne Batori·Ben Lewis·Christoph Affolderbach·Gaetano Mileti·Erling Riis·Paul Griffin
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Abstract

We demonstrate a Ramsey-type microwave clock interrogating the 6.835~GHz ground-state transition in cold \textsuperscript{87}Rb atoms loaded from a grating magneto-optical trap (GMOT) enclosed in an additively manufactured loop-gap resonator microwave cavity. A short-term stability of $1.5 \times10^{-11} $~$\tau^{-1/2}$ is demonstrated, in reasonable agreement with predictions from the signal-to-noise ratio of the measured Ramsey fringes. The cavity-grating package has a volume of $\approx$67~cm\textsuperscript{3}, ensuring an inherently compact system while the use of a GMOT drastically simplifies the optical requirements for laser cooled atoms. This work is another step towards the realisation of highly compact portable cold-atom frequency standards.

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Alan Bregazzi, Etienne Batori, Ben Lewis, Christoph Affolderbach, Gaetano Mileti, Erling Riis, Paul Griffin. 2023-05-04. A cold-atom Ramsey clock with a low volume physics package. https://arxiv.org/abs/2305.02944

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