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  • Malo Cadoret; De Mirandes, Estefania; Cladé, Pierre; Schwob, Catherine; Nez, François; Julien, Lucile; Biraben, François; Guellati-Khélifa, Saïda

    arXiv.org, 12/2008
    Paper, Journal Article

    We use Bloch oscillations to transfer coherently many photon momenta to atoms. Then we can measure accurately the recoil velocity \(\hbar k/m\) and deduce the fine structure constant \(\alpha\). The velocity variation due to Bloch oscillations is measured using atom interferometry. This method yields to a value of the fine structure constant \(\alpha^{-1}= 137.035 999 45 (62)\) with a relative uncertainty of about \(4.5 \times 10^{-9}\).