Volume 49, Number 4, February II 2000
|Page(s)||424 - 430|
|Section||Atomic and molecular physics|
|Published online||01 September 2002|
Spatial diffusion of atoms cooled in a speckle field
Laboratoire Kastler Brossel (Laboratoire Kastler Brossel is
an unité de recherche de l'Ecole Normale Supérieure et de l'Université
Pierre et Marie Curie associée au CNRS.)
Département de Physique de l'Ecole Normale Supérieure
24, rue Lhomond, F-75231 Paris cedex 05, France
2 Department of Physics and Applied Physics, Strathclyde University Glasgow G4 0NG, UK
3 Max-Planck Institut für Quantenoptik Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
Accepted: 2 December 1999
Spatial diffusion of atoms in a disordered molasses created by a speckle field is studied both numerically and experimentally. It is shown that the ratio (kinetic temperature divided by spatial diffusion coefficient) can be expressed as a simple function of the light-shift, the frequency detuning from resonance and the speckle size. We find that the transition from the jumping to the oscillating regime of laser cooling is clearly reflected in the behaviour of this ratio.
PACS: 32.80.Pj – Optical cooling of atoms; trapping / 42.50.Vk – Mechanical effects of light on atoms, molecules, electrons, and ions
© EDP Sciences, 2000
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