J. Guéna
PSL Research University
15 Papers
181 Citations
J. Guéna is an academic researcher from PSL Research University. The author has contributed to research in topics: Atomic clock & Atomic fountain. The author has an hindex of 8, co-authored 15 publications.
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Papers
Experimental realization of an optical second with strontium lattice clocks.
R. Le Targat,Luca Lorini,Y. Le Coq,Michal Zawada,J. Guéna,Michel Abgrall,Mikhail Gurov,Peter Rosenbusch,D. Rovera,B. Nagorny,R. Gartman,Philip G. Westergaard,Michael E. Tobar,M. Lours,Giorgio Santarelli,André Clairon,S. Bize,P. Laurent,Pierre Lemonde,Jérôme Lodewyck +19 more
TL;DR: An important step in the direction of a possible new definition of the second is presented, and 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).
Searching for an Oscillating Massive Scalar Field as a Dark Matter Candidate Using Atomic Hyperfine Frequency Comparisons.
TL;DR: This work uses 6 yrs of accurate hyperfine frequency comparison data of the dual rubidium and caesium cold atom fountain FO2 at LNE-SYRTE to search for a massive scalar dark matter candidate and provides improved constraints on the coupling of the putative scalar field to standard matter.
251
Ultra-low noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
J. Millo,Michel Abgrall,M. Lours,E. M. L. English,Haifeng Jiang,J. Guéna,André Clairon,S. Bize,Y. Le Coq,Giorgio Santarelli,Michael E. Tobar +10 more
TL;DR: In this paper, a fiber-based femtosecond laser was used to generate a low-noise microwave reference signal using an ultra-stable optical cavity, which was compared with a liquid Helium cryogenic sapphire oscillator and a Ti:Sapphire-based optical frequency comb system.
179
Ultralow noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
J. Millo,Michel Abgrall,M. Lours,E. M. L. English,Haifeng Jiang,J. Guéna,André Clairon,Michael E. Tobar,Sébastien Bize,Y. Le Coq,Giorgio Santarelli +10 more
TL;DR: In this article, the authors demonstrate the use of a fiber-based femtosecond laser locked onto an ultrastable optical cavity to generate a low-noise microwave reference signal.
169
A neutral atom frequency reference in the deep UV with 10^(-15) range uncertainty
TL;DR: An assessment of the ( 6s2) (1)S0 ↔ (6s6p)(3)P0 clock transition frequency in 199Hg is presented with an uncertainty reduction of nearly 3 orders of magnitude and an atomic quality factor Q of ∼10(14) is demonstrated.