Numéro
J. Phys. IV France
Volume 135, October 2006
Page(s) 3 - 7
DOI http://dx.doi.org/10.1051/jp4:2006135002
Publié en ligne 23 novembre 2006
Neuvième colloque sur les lasers et l'optique quantique
C. Chardonnet et G. Millot
J. Phys. IV France 135 (2006) 3-7

DOI: 10.1051/jp4:2006135002

Bloch oscillations of ultracold atoms: A tool for metrological measurements

P. Cladé1, M. Cadoret1, E. De Mirandes2, S. Guellati-Khélifa3, C. Schwob1, F. Nez1, L. Julien1 and F. Biraben1

1  Laboratoire Kastler Brossel, École Normale Supérieure, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France
    e-mail: schwob@spectro.jussieu.fr
2  European Laboratory for Non-Linear Spectroscopy, University of Florence, via Nello Carrara 1, 50019-Sesto-Fiorentino, Florence, Italy
3  INM, Conservatoire National des Arts et Métiers, 292 rue Saint Martin, 75141 Paris Cedex 03, France


(Published online 23 November 2006)

Abstract
We show that Bloch oscillations of ultracold atoms in an optical lattice are a strong tool to measure accurately some physical constants. We describe in this paper two experimental approaches using a pure and an accelerated vertical standing waves to perform respectively a determination of the local acceleration of gravity g to ppm precision and of the fine structure constant $\alpha$ with a relative uncertainty of 6,7 ppb.



© EDP Sciences 2006