Hannover 2010 – wissenschaftliches Programm

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SYFC: Symposium Variations of Fundamental Constants: Theory and Experiment

SYFC 1: Variations of Fundamental Constants I

SYFC 1.3: Hauptvortrag

Montag, 8. März 2010, 15:00–15:30, A 001

Stability of the proton-to-electron mass ratio tested with molecular spectroscopy using an optical link to frequency reference — •Anne Amy-Klein¹, Alexander Shelkovnikov^1,3, Robert J. Butcher^1,4, Olivier Lopez¹, Christophe Daussy¹, Haifeng Jiang², Fabien Kéfélian¹, Giorgio Santarelli², and Christian Chardonnet¹ — ¹LPL, CNRS, Université Paris 13, Villetaneuse, France — ²LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, France — ³Lebedev Physical Institute, Moscow, Russia — ⁴The Cavendish Laboratory, Cambridge, UK

Time and frequency metrology has experienced a lot of developments since ten years leading to the possibility of many fundamental tests of physics, as, for example, the search for a temporal variation of fundamental constants. However these tests are limited to macroscopic resonators or atomic systems while molecular systems are still difficult to probe with a high sensitivity, since experiments on molecules lacks of absolute frequency measurements set-ups. In that context, we have developed an optical link between our lab and the LNE-SYRTE, which allows us to benefit from their frequency references. Using this link, we performed the first experimental comparison of a molecular clock to an atomic clock, which gives a direct line to the proton-to-electron mass ratio stability. Recently, we extended the frequency dissemination technique to non-dedicated fibers of the telecommunication network simultaneously carrying digital data from the Internet traffic. This is very challenging for the development of transcontinental atomic and molecular clocks comparisons.