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Claude Cohen Tannoudji

Prix Nobel en 1997 pour le ralentissement et le piégeage des atomes par la lumière laser.

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Accueil du site > Thèses et habilitations > Bloch oscillations of ultra-cold atoms : application to high-precision measurements

Bloch oscillations of ultra-cold atoms : application to high-precision measurements

PhD thesis defense of Manuel Andia.

Friday, September 25th at 2:30 P.M., room 56.B, level -1, Université Pierre et Marie Curie, 4 place Jussieu - 75005 Paris.

Abstract :

This work developed around three experiments.
The first one concerned the measurement of the ratio h/m between Planck’s constant and rubidium atomic mass. We have carried out a thorough study of systematic effects, such as the Gouy phase or the quadratic Zeeman effect. The development of a new compact and high-power laser source (12W@780nm) allowed to decrease the effect of Gouy phase by a factor of 4.
The second experiment revolved around the realization of a compact and precise gravimeter, using Bloch oscillations to maintain atoms against gravity. This allowed for a measurement of local gravity acceleration with a promising preliminary sensitivity of 4.7E-7 g in 1s.
Finally, the third experiment consisted in the realization of the double diffraction technique, with the aim of implementing Bloch-oscillation-based large momentum transfer beamsplitters.

This PhD thesis was carried out under the supervision of Saïda Guellati-Khélifa and Pierre Cladé, at Laboratoire Kastler Brossel.

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