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Speckle-intensity correlations of photons scattered by cold atoms

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2015

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Grémaud, Benoît
Miniatura, Christian

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https://doi.org/10.1103/PhysRevA.92.013819
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Physical Review A. 2015, 92(1), 013819. ISSN 1050-2947. eISSN 1094-1622. Available under: doi: 10.1103/PhysRevA.92.013819

Zusammenfassung

The irradiation of a dilute cloud of cold atoms with a coherent light field produces a random intensity distribution known as laser speckle. Its statistical fluctuations contain information about the mesoscopic scattering processes at work inside the disordered medium. Following up on earlier work by Assaf and Akkermans [Phys. Rev. Lett. 98, 083601 (2007)], we analyze how static speckle-intensity correlations are affected by an internal Zeeman degeneracy of the scattering atoms. It is proven on general grounds that the speckle correlations cannot exceed the standard Rayleigh law. On the contrary, because which-path information is stored in the internal atomic states, the intensity correlations suffer from strong decoherence and become exponentially small in the diffusive regime applicable to an optically thick cloud.

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530 Physik

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cond-mat.quant-gas, Optics, Disordered Systems and Neural Networks

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ISO 690MÜLLER, Cord A., Benoît GRÉMAUD, Christian MINIATURA, 2015. Speckle-intensity correlations of photons scattered by cold atoms. In: Physical Review A. 2015, 92(1), 013819. ISSN 1050-2947. eISSN 1094-1622. Available under: doi: 10.1103/PhysRevA.92.013819
BibTex
@article{Muller2015Speck-31878,
  year={2015},
  doi={10.1103/PhysRevA.92.013819},
  title={Speckle-intensity correlations of photons scattered by cold atoms},
  number={1},
  volume={92},
  issn={1050-2947},
  journal={Physical Review A},
  author={Müller, Cord A. and Grémaud, Benoît and Miniatura, Christian},
  note={Article Number: 013819}
}
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