G
Giorgio Santarelli
Researcher at University of Bordeaux
Publications - 198
Citations - 6759
Giorgio Santarelli is an academic researcher from University of Bordeaux. The author has contributed to research in topics: Atomic clock & Laser. The author has an hindex of 39, co-authored 184 publications receiving 6276 citations. Previous affiliations of Giorgio Santarelli include Pierre-and-Marie-Curie University & Centre national de la recherche scientifique.
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Journal ArticleDOI
Quantum projection noise in an atomic fountain: a high stability cesium frequency standard
Giorgio Santarelli,Ph. Laurent,Pierre Lemonde,André Clairon,Anthony Mann,S. Chang,Andre N. Luiten,Christophe Salomon +7 more
TL;DR: In this article, an ultrastable cryogenic sapphire oscillator is used to measure the short-term frequency stability of the fountain as a function of the number of detected atoms.
Journal ArticleDOI
Measurement of the Hydrogen 1 S - 2 S Transition Frequency by Phase Coherent Comparison with a Microwave Cesium Fountain Clock
M. Niering,Ronald Holzwarth,J. Reichert,P. V. Pokasov,Th. Udem,Martin Weitz,Theodor W. Hänsch,Pierre Lemonde,Giorgio Santarelli,Michel Abgrall,P. Laurent,Christophe Salomon,André Clairon +12 more
TL;DR: An absolute frequency measurement of the hydrogen 1S-2S two-photon transition in a cold atomic beam with an accuracy of 1.8 parts in 10(14) Hz is reported on.
Journal ArticleDOI
New limits on the drift of fundamental constants from laboratory measurements.
M. Fischer,Nikolai N. Kolachevsky,Marcus Zimmermann,Ronald Holzwarth,Thomas Udem,Theodor W. Hänsch,Michel Abgrall,J. Grünert,I. Maksimovic,Sébastien Bize,H. Marion,F. Pereira Dos Santos,Pierre Lemonde,Giorgio Santarelli,P. Laurent,André Clairon,Christophe Salomon,Martin Haas,Ulrich D. Jentschura,Christoph H. Keitel +19 more
TL;DR: The absolute 1S-2S transition frequency nu(H) in atomic hydrogen is remeasured and separate limits on alpha/alpha=(-0.9+/-2.9) x 10(-15) yr(-1) and the fractional time variation of the ratio of Rb and Cs nuclear magnetic moments mu(Rb)/mu(Cs) equal to (-0.5+/-1.7) provides information on the temporal behavior of the constant of strong interaction.
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A clock network for geodesy and fundamental science.
Christian Lisdat,Gesine Grosche,Nicolas Quintin,C. Shi,S. M. F. Raupach,Christian Grebing,Daniele Nicolodi,Fabio Stefani,Fabio Stefani,A. Al-Masoudi,S. Dörscher,Sebastian Häfner,Jean-Luc Robyr,Nicola Chiodo,S. Bilicki,E. Bookjans,A. Koczwara,Sebastian Koke,A. Kuhl,Fabrice Wiotte,F. Meynadier,Emilie Camisard,M. Abgrall,M. Lours,Thomas Legero,Harald Schnatz,Uwe Sterr,Heiner Denker,C. Chardonnet,Y. Le Coq,Giorgio Santarelli,Anne Amy-Klein,R. Le Targat,Jérôme Lodewyck,Olivier Lopez,Paul-Eric Pottie +35 more
TL;DR: The capability of performing high resolution international clock comparisons paves the way for a redefinition of the unit of time and an all-optical dissemination of the SI-second.
Journal ArticleDOI
Frequency stability degradation of an oscillator slaved to a periodically interrogated atomic resonator
TL;DR: A physical analysis of the response of a two-level atom to the interrogation oscillator phase noise in Ramsey and multi-Rabi interrogation schemes using a standard quantum mechanical approach helps to calculate the degradation of the frequency stability of a pulsed atomic frequency standard.