Fluctuations and correlation of light: from atoms to stars

We study the fluctuations and correlations of light after interaction with cold or hot atomic vapors, either after transmission through the atoms, or after scattering by the atoms, in the single and multiple scattering regimes. In the near future we want to apply these measurement techniques to the study of the random laser.

We also collaborate with astrophysicists of the Observatoire de la Côte d'Azur (Lagrange laboratory) to work towards the revival of intensity interferometry (Hanbury Brown and Twiss technique) with modern photonic technologies.


People currently involved in this topic:

Robin Kaiser, Mathilde Fouché, William Guerin, Guillaume Labeyrie, Aurélien Eloy (PhD, 2015-2018).

External collaborators: Farrokh Vakili, Jean-Pierre Rivet and the C2PU team at Observatoire de la Côte d'Azur, Michel Lintz, Sébastien Tanzilli, Romain Bachelard (São Carlos, Brazil).


People involved in the past:

Antoine Dussaux (Postdoc, 2015-2016), Samir Vartabi Kashanian (PhD, 2013-2016), Riadh Rebhi (Postdoc, 2010-2012)




  • Diffusing-wave spectroscopy of cold atoms in ballistic motion
    A. Eloy, Z. Yao, R. Bachelard, W. Guerin, M. Fouché, R. Kaiser
    Submitted (2017), preprint: arXiv:1710.03974
  • Temporal intensity interferometry: photon bunching on three bright stars
    W. Guerin, A. Dussaux, M. Fouché, G. Labeyrie, J.-P. Rivet, D. Vernet, F. Vakili, R. Kaiser
    Mon. Not. Roy. Astron. Soc. 472, 4126 (2017), preprint: arXiv:1708.06119
  • Noise spectroscopy with large clouds of cold atoms
    S. Vartabi Kashanian, A. Eloy, W. Guerin, M. Lintz, M. Fouché, R. Kaiser
    Phys. Rev. A 94, 043622 (2016), preprint: arXiv:1606.07658
  • Temporal intensity correlation of light scattered by a hot atomic vapor
    A. Dussaux, T. Passerat de Silans, W. Guerin, O. Alibart, S. Tanzilli, F. Vakili, R. Kaiser
    Phys. Rev. A 93, 043826 (2016), preprint: arXiv:1601.00853
  • Fluctuation properties of laser light after interaction with an atomic system: Comparison between two-level and multilevel atomic transitions
    A. Lezema, R. Rebhi, A. Kastberg, S. Tanzilli, R. Kaiser
    Phys. Rev. A 92, 033853 (2015), preprint: arXiv:1502.07868


See also the Master and PhD thesis: