Determination of the fine structure constant with atomic interferometry and Bloch oscillations.
ORAL
Abstract
We report a new measurement of the recoil of $^{87}$Rb atoms using atomic interferometry and Bloch oscillations of ultracold atoms in an accelerated lattice. For the first time, we combine the high efficiency of Bloch oscillations with the sensitivity of Ramsey-Bord\'e interferometer. Our measurement with a statistical uncertainty of 3.4~ppb combined with a careful study of systematic effects (3.3~ppb) leads to a value of the fine-structure constant with an uncertainty below 5~ppb.
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