Combination of BLOCH oscillations with a Ramsey-Bordé interferometer: new determination of the fine structure constant.
Phys Rev Lett
; 101(23): 230801, 2008 Dec 05.
Article
em En
| MEDLINE
| ID: mdl-19113536
ABSTRACT
We report a new experimental scheme which combines atom interferometry with Bloch oscillations to provide a new measurement of the ratio h/mRb. 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/mRb leads to a new determination of the fine structure constant alpha(-1) =137.03599945 (62) with a relative uncertainty of 4.6 x 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.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article