ORCID Profile
0000-0001-5570-7546
Current Organisation
CNRS Délégation Alpes
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Publisher: IOP Publishing
Date: 25-04-2005
Publisher: EDP Sciences
Date: 11-2004
Publisher: Springer Science and Business Media LLC
Date: 09-07-2013
DOI: 10.1038/NCOMMS3109
Abstract: Progress in realizing the SI second had multiple technological impacts and enabled further constraint of theoretical models in fundamental physics. Caesium microwave fountains, realizing best the second according to its current definition with a relative uncertainty of 2-4 × 10(-16), have already been overtaken by atomic clocks referenced to an optical transition, which are both more stable and more accurate. Here we present an important step in the direction of a possible new definition of the second. Our system of five clocks connects with an unprecedented consistency the optical and the microwave worlds. For the first time, two state-of-the-art strontium optical lattice clocks are proven to agree within their accuracy budget, with a total uncertainty of 1.5 × 10(-16). Their comparison with three independent caesium fountains shows a degree of accuracy now only limited by the best realizations of the microwave-defined second, at the level of 3.1 × 10(-16).
Publisher: Springer Science and Business Media LLC
Date: 04-09-2008
Publisher: Elsevier BV
Date: 10-2004
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2013
Publisher: Springer Science and Business Media LLC
Date: 31-10-2013
DOI: 10.1038/NCOMMS3782
Publisher: IEEE
Date: 07-2012
Location: South Africa
No related grants have been discovered for Pierre Lemonde.