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

We demonstrate a Ramsey-type microwave clock interrogating the 6.835 GHz ground-state transition in cold [Formula: see text]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 [Formula: see t...

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Bibliographic Details
Published inScientific reports Vol. 14; no. 1; p. 931
Main Authors Bregazzi, A, Batori, E, Lewis, B, Affolderbach, C, Mileti, G, Riis, E, Griffin, P F
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 09.01.2024
Nature Publishing Group UK
Nature Portfolio
Subjects
Additive manufacturing
Clocks & watches
Cold
Lasers
Light
Optics
Physics
Syrups & sweeteners
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Summary:We demonstrate a Ramsey-type microwave clock interrogating the 6.835 GHz ground-state transition in cold [Formula: see text]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 [Formula: see text] 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 [Formula: see text]67 cm[Formula: see text], 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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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-51418-8