Format

Send to

Choose Destination
See comment in PubMed Commons below
Phys Rev Lett. 2008 Dec 5;101(23):230801. Epub 2008 Dec 3.

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

Author information

  • 1Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France.

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.

PMID:
19113536
DOI:
10.1103/PhysRevLett.101.230801
[PubMed]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Physical Society
    Loading ...
    Support Center