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

2023/05/04 by Alan Bregazzi, Bregazzi, Alan, Etienne Batori +11 · 3 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences

paper · pdf · doi:10.48550/arxiv.2305.02944

openalex publication_date 2023/05/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate a Ramsey-type microwave clock interrogating the 6.835~GHz ground-state transition in cold \textsuperscript87Rb 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 ×10^-11 ~τ^-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 ≈67~cm\textsuperscript3, 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.

Cited by

• Dual-Frequency Absorption Spectroscopy in Laser-Cooled Rubidium Atoms: Theoretical Modeling and Experiment
• Single-Beam Magneto-Optical Trap in Back-to-Back Pyramidal and Conical Mirrors
• Narrow-Line Electric Quadrupole Cooling And Background-Free Imaging Of A Single Cs Atom With Spatially Structured Light

Related

• Tests of Cold Atom Clock in Orbit
• Noise budget of a trapped on chip cold atom Rubidium 87 clock
• In-vacuum microwave resonator for a compact cold atom frequency standard
• Realisation of a Frequency Standard Using an Atomic Fountain
• Portable Laser-Pumped Rb Atomic Clock with Digital Circuits