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arXiv:0809.3177 · The European Physical Journal Special Topics

Atom interferometry based on light pulses: Application to the high precision measurement of the ratio h/m and the determination of the fine structure constant

Malo Cadoret, Estefania de Mirandés, Pierre Cladé, F. Nez, Lucile Julien, F. Biraben, Saïda Guellati-Khélifa

Published Jun 1, 2009• 27 citations
arXivHTMLPDF
DOI
10.1140/epjst/e2009-01046-2

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In Paris, we are using an atom interferometer to precisely measure the recoil velocity of an atom that absorbs a photon. In order to reach a high sensitivity, many recoils are transferred to atoms using the Bloch oscillations technique. In this lecture, I will present in details this technique and its application to high precision measurement. I will especially describe in details how this method allows us to perform an atom recoil measurement at the level of $1.3 \times 10^{-9}$. This measurement is used in the most precise determination of the fine structure constant that is independent of quantum electrodynamics.

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Development of atom interferometry and its application in precision measurement are reviewed in this paper. The principle, features and the implementation of atom interferometers are introduced, the recent progress of precision measurement with atom interferometry, including determination of gravitational constant and fine structure constant, measurement of gravity, gravity gradient and rotation, test of weak equivalence principle, proposal of gravitational wave detection, and measurement of quadratic Zeeman shift are reviewed in detail. Determination of gravitational redshift, new definition of kilogram, and measurement of weak force with atom interferometry are also briefly introduced.
In Paris, we are using an atom interferometer to precisely measure the recoil velocity of an atom that absorbs a photon. In order to reach a high sensitivity, many recoils are transferred to atoms using the Bloch oscillations technique. In this lecture, I will present in details this technique and its application to high precision measurement. I will especially describe in details how this method allows us to perform an atom recoil measurement at the level of 1.3×10−91.3 \times 10^{-9}1.3×10−9. This measurement is used in the most precise determination of the fine structure constant that is independent of quantum electrodynamics.