Light transport in cold atoms: the fate of coherent backscattering in the weak localization regime

Details Light transport in cold atoms: the fate of coherent backscattering in the weak localization regime Light transport in cold atoms: the fate of coherent backscattering in the weak localization regime

2003-04-11

arxiv.org/abs/physics/0304045v1

Physica B 328 (2003) 157

Physics

Atomic Physics

Scientific paper

10.1016/S0921-4526(02)01786-6

The recent observation of coherent backscattering (CBS) of light by atoms has emphasized the key role of the velocity spread and of the quantum internal structure of the atoms. Firstly, using highly resonant scatterers imposes very low temperatures of the disordered medium in order to keep the full contrast of the CBS interference. This criterion is usually achieved with standard laser cooling techniques. Secondly, a non trivial internal atomic structure leads to a dramatic decrease of the CBS contrast. Experiments with Rubidium atoms (with a non trivial internal structure) and with Strontium (with the simplest possible internal structure) show this behaviour and confirm theoretical calculations.

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