Related Experiment Video
Updated: Jul 6, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
A cold-atom Ramsey clock with a low volume physics package
A Bregazzi1, E Batori2, B Lewis3
1SUPA and Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK. alan.bregazzi@strath.ac.uk.
Abstract:
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.
Related Concept Videos
Equilibrium Conditions for a Particle
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
The Quantum-Mechanical Model of an Atom
Forced Oscillations
Atomic Nuclei: Larmor Precession Frequency
Physical Pendulum
When dealing with complicated systems, the mass moment of inertia is an important parameter, as it...
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...

