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A: Fachverband Atomphysik

A 14: Poster: Precision spectroscopy of atoms and ions (with Q)

A 14.19: Poster

Monday, March 17, 2014, 16:30–18:30, Spree-Palais

Towards cavity-based non-destructive readout of a Strontium lattice clock — •Ulrich Eismann, Chunyan Shi, Jean-Luc Robyr, Sébastien Bize, Rodolphe Le Targat, and Jérôme Lodewyck — LNE-SYRTE - Observatoire de Paris, CNRS, UPMC, 61 Avenue de l’Observatoire, 75014 Paris, France.

Recently, the Cesium fountain clocks currently defining the SI second have been superseded in both stability and accuracy by atomic clocks referenced to optical transitions. A way to significantly improve the stability of these clocks is to implement a non-destructive readout of the clock state populations, potentially allowing new applications like relativistic geodesy.

We propose a novel route and demonstrate first results of a doubly-differential non-destructive detection scheme for Strontium atoms inside a high-finesse dual-wavelength cavity. Furthermore, spin squeezing of the coupled atom-cavity system allows pushing of the readout noise below the standard quantum limit.