Combination of Bloch oscillations with a Ramsey-Bordé interferometer : new determination of the fine structure constant - Archive ouverte HAL
Article Dans Une Revue Physical Review Letters Année : 2008

Combination of Bloch oscillations with a Ramsey-Bordé interferometer : new determination of the fine structure constant

Résumé

We report a new experimental scheme which combines atom interferometry with Bloch oscillations to provide a new measurement of the ratio $h/m_{\mathrm{Rb}}$. By using Bloch oscillations, we impart to the atoms up to $1600$ recoil momenta and thus we improve the accuracy on the recoil velocity measurement. The deduced value of $h/m_{\mathrm{Rb}}$ leads to a new determination of the fine structure constant $\alpha^{-1}=137.035\,999\,45\,(62)$ with a relative uncertainty of $4.6\times 10^{-9}$. The comparison of this result with the value deduced from the measurement of the electron anomaly provides the most stringent test of QED.
Fichier principal
Vignette du fichier
papier-16-10-2008.pdf (230.25 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00331743 , version 1 (17-10-2008)

Identifiants

Citer

Malo Cadoret, Estefania de Mirandes, Pierre Cladé, Saïda Guellati-Khélifa, Catherine Schwob, et al.. Combination of Bloch oscillations with a Ramsey-Bordé interferometer : new determination of the fine structure constant. Physical Review Letters, 2008, 101 (23), pp.230801. ⟨10.1103/PhysRevLett.101.230801⟩. ⟨hal-00331743⟩
240 Consultations
146 Téléchargements

Altmetric

Partager

More