4 November 2003 Precision spectroscopy with ultracold atoms: measurement of optical frequencies
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Proceedings Volume 5226, 12th International School on Quantum Electronics: Laser Physics and Applications; (2003) https://doi.org/10.1117/12.518889
Event: 12th International School on Quantum Electronics Laser Physics and Applications, 2002, Varna, Bulgaria
Abstract
Precision laser spectroscopy at λ = 657 nm based on cold neutral Ca atoms released from a magneto-optical trap (MOT) is described. Systematic contributions to the uncertainty resulting from the residual velocity of the atoms and the acceleration in the gravitational field are determined and their influence is reduced by using a combination of different atom interferometers. The results are applied to an optical frequency standard based on Ca atoms. A fractional uncertainty in the measured clock frequency 2 • 10-14 is observed. The application of a novel method for producing ultra-cold atoms showed in first atom interferometric measurements the potential to further reduce the uncertainty to below 10-15.
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Juergen Helmcke, "Precision spectroscopy with ultracold atoms: measurement of optical frequencies", Proc. SPIE 5226, 12th International School on Quantum Electronics: Laser Physics and Applications, (4 November 2003); doi: 10.1117/12.518889; https://doi.org/10.1117/12.518889
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