@inproceedings{045b57f513764020aaf7fe2193ca2687,
title = "Advances in 133Cs fountains: control of the cold collision shift and observation of Feshbach resonances",
abstract = "This paper describes the work performed at BNM-SYRTE (Observatoire de Paris) over the past few years toward the improvement and the use of microwave frequency standards using laser-cooled atoms. First, recent improvements of the 133Cs and 87Rb atomic fountains are described. An important advance is the achievement of a fractional frequency instability of 1.6 × 10-14τ-1/2 where τ is the measurement time in seconds, thanks to the routine use of a cryogenic sapphire oscillator as an ultra-stable local frequency reference. The second advance is a powerful method to control the frequency shift due to cold collisions. These two advances lead to a frequency stability of 2 × 10-16 at 50 000 s for the first time for primary standards. In addition, these clocks realize the SI second with an accuracy of 7 × 10-16, one order of magnitude below that of uncooled devices.",
keywords = "Optical cooling of atoms, trapping, Time and frequency, Determination of fundamental constants",
author = "S. Bize and H. Marion and L. Cacciapuoti and C. Vian and P. Rosenbusch and \{Pereira dos Santos\}, F. and P. Wolf and M. Abgrall and I. Maksimovic and J. Gr{\"u}nert and G. Santarelli and P. Laurent and A. Luiten and M. Tobar and S.J.J.M.F. Kokkelmans and C. Salomon and A. Clairon",
year = "2005",
month = may,
day = "1",
doi = "10.1063/1.1928844",
language = "English",
isbn = "0-7354-0255-8",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics",
pages = "93--102",
editor = "L.G. Marcassa",
booktitle = "Atomic Physics 19: XIX International Conference on Atomic Physics (ICAP 2004) , 25-30 July, 2004, Rio de Janeiro, Brazil",
address = "United States",
note = "19th International Conference on Atomic Physics (ICAP 2004), ICAP 2004 ; Conference date: 25-07-2004 Through 30-07-2004",
}