Coherent backscattering of light by atoms in the saturated regime

Details Coherent backscattering of light by atoms in the saturated regime Coherent backscattering of light by atoms in the saturated regime

2004-03-08

arxiv.org/abs/quant-ph/0403057v1

Physics

Quantum Physics

16 pages, 10 figures

Scientific paper

10.1103/PhysRevA.70.023817

We present the first calculation of coherent backscattering with inelastic scattering by saturated atoms. We consider the scattering of a quasi-monochromatic laser pulse by two distant atoms in free space. By restricting ourselves to scattering of two photons, we employ a perturbative approach, valid up to second order in the incident laser intensity. The backscattering enhancement factor is found to be smaller than two (after excluding single scattering), indicating a loss of coherence between the doubly scattered light emitted by both atoms. Since the undetected photon carries information about the path of the detected photon, the coherence loss can be explained by a which-path argument, in analogy with a double-slit experiment.

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